Model 326/346 Type 3 Fire Engine Specification

Issue Date: March 2023

Supersedes: October 2022

Type 3 Fire Engine Specification, Model 326/346 – Supersedes October 2022

TABLE OF CONTENTS

RECORD OF REVISIONS

1 — GENERAL

1.1 General Statement

1.2 NFPA 1900 Compliance

1.3 Weight Requirement

1.4 Height Requirement

1.5 Tilt Test

1.6 Ramp Break-Over Angle

1.7 Apparatus Body Height

1.8 In-Service Weights and Center of Gravity

1.9 Specification Deviations

1.10 Brand Name or Equivalent Products

2 — CHASSIS REQUIREMENTS FOR REFERENCE ONLY

2.1 Wheelbase

2.2 Cab to Axle

2.3 After Frame

2.4 Tow Hooks

2.5 Frame Rails

2.6 Bumper, Front

2.7 Frame Extension

2.8 Axle, Front

2.9 Suspension, Front

2.10 Brake System, Dual Air

2.11 Steering Column

2.12 Steering Wheel

2.13 Steering Gear

2.14 Exhaust

2.15 Electrical System

2.16 Alternator

2.17 Battery System

2.18 Radio

2.19 Starter

2.20 Grille

2.21 Front End

2.22 Engine

2.23 Radiator

2.24 Transmission, Automatic

2.25 Transfer Case (Model 346 Only)

2.26 Transmission Controls

2.27 Axle, Rear

2.28 Suspension, Rear

2.29 Fuel Tank

2.30 Diesel Exhaust Fluid Tank

2.31 Cab

2.32 Tires and Wheels

2.33 Speed Limitation

2.34 Connected diagnostics

3 — CHASSIS ELECTRICAL REQUIREMENTS

3.1 Chassis Electrical Additional Equipment and Modifications

3.2 Battery Master Switch

3.3 Battery “On” Indicator Light

3.4 Electronic Control Module Programming

3.5 Back Up Alarm

3.6 Ground Lights

3.7 Antennas

3.8 Radio Pre-Wire

3.9 Auxiliary Lighting

3.10 Multiplex System

3.11 Rear View Backup Camera System

3.12 Tire Pressure Monitoring System (TPMS)

3.13 Jump Start Stud Location

4 — TRAFFIC WARNING SYSTEMS

4.1 Traffic Warning Systems Requirements

4.2 Electronic Siren and Controller

4.3 Speaker

4.4 Forward Upper Zone A/B/D Lightbar

4.5 Aft Upper Zone B/D Warning Lights

4.6 Upper Zone C Warning Lights

4.7 Lower Zone A Warning Lights

4.8 Forward Lower Zone B/D Warning Lights

4.9 Aft Lower Zone B/D Warning Lights

4.10 Lower Zone C Warning Lights

4.11 Air Horn

4.12 Headlight Flasher

5 — CHASSIS ADDITIONS AND MODIFICATIONS

5.1 Additional Equipment

5.2 Apparatus Fluid Types and Quantities

5.3 Seating Capacity

5.4 Seat Belts

5.5 Seat Belt Warning

5.6 Vehicle Height Warning

5.7 Final Stage Manufacturer Vehicle Certification

5.8 Noise Hazard Warning

5.9 Air Filter Ember Protection Screen Warning

5.10 Do Not Move Apparatus Warning

5.11 Cab Console

5.12 Center Console Aft Storage

5.13 Chassis Manufacturer Grab Handle

5.14 Front Tow Hooks

5.15 Rear Tow Eyes

5.16 Front Bumper Extension

5.17 Hose Storage Tray

5.18 Front Fenders, Rubber

5.19 Mud Flaps

5.20 Cab Steps, Batteries, and Air Tanks

5.21 Exhaust System

5.22 Vertical Exhaust

5.23 Heat Protection

5.24 Air Line, Fuel Hose, Electrical Harness and Connector Protection

5.25 Cabin Air Ember Guard

5.26 Transmission Power Take Off

6 — APPARATUS BODY DESCRIPTION

6.1 General Requirements

6.2 Body Design and Construction Requirements

6.3 Body Materials

6.4 Body Mounting

6.5 Drip Moldings

6.6 Vertical Surfaces

6.7 Grab Handle

6.8 Rear Step

6.9 Hose Bed Access Ladder

6.10 Compartmentation

6.11 Driver's Side Compartments

6.12 Passenger's Side Compartments

6.13 Rear Seat Storage Compartment

6.14 Hose Reel Compartment

6.15 Dunnage Compartments

6.16 Compartment Doors - Aluminum Overlap Type

6.17 Door Latches and Hardware

6.18 Door Hold Open Devices

6.19 Rear Compartment Door

6.20 Compartment Floor Mats

6.21 Adjustable Shelf Channels

6.22 Tool Bracket Mounting Channels

6.23 Compartment Shelves

6.24 Fenders and Wheel Wells

6.25 Wheel Chock Storage Compartments

6.26 Body Scuff Guards

6.27 Hose Bed

6.28 Hose Bed Dividers

6.29 Hose Bed Cover

6.30 Stainless Steel Body Trim

6.31 Hard Suction Hose Storage

6.32 Passenger Side - Rear Cab Step Storage

7 — PUMP AND PLUMBING

7.1 Pump General

7.2 Pump Specifications

7.3 Pump Body and Seals

7.4 Impeller

7.5 Pump Shaft

7.6 Drive Unit Construction

7.7 PTO Shift

7.8 Pump Shift Indicator Lights

7.9 Rear Mounted Pump Operator's Panel

7.10 Pump/Plumbing Compartment

7.11 Pump Panel Lights

7.12 Required Testing – Indicator Lights and Engine Speed Advancement Interlock

8 — VALVES, CONTROLS, GAUGES & PLUMBING REQUIREMENTS

8.1 Items Provided

8.2 Main Pump Discharge and Intake Plumbing

8.3 Pump Operator’s Panel Controls

8.4 Pump Performance Acceptance Test Plate

8.5 Pump Operating Instruction Plate

8.6 Test Gauge Connections

8.7 Switch Panel

8.8 Pump Panel Labeling

8.9 Master Discharge Pressure Gauge

8.10 Master Intake Pressure Gauge

8.11 Pump Cooler/Bypass

8.12 Master Drain

8.13 Pressure Gauge Access Door

8.14 In-Cab Gauge

8.15 Remote Throttle and Engine Status Center (ESC)

8.16 Automatic Pump Override

8.17 Water Tank Level Sight Gauge

8.18 Water Tank Level Electronic Gauges

8.19 Class A Foam Tank Level Gauge

8.20 Priming Pump

8.21 Discharge Locations

8.22 Intake Location

8.23 Tank Fill

8.24 Tank to Pump Line

8.25 Direct Tank Fill/Drain

8.26 Backpack Fill

8.27 Booster Hose Reel

8.28 Foam Proportioning System

8.29 Foam Upload System

8.30 Pump Performance Test and Certification

9 — WATER TANK

9.1 Construction

9.2 Clean Out Plug

9.3 Tank Capacity

9.4 Foam Tank

10 — BODY ELECTRICAL REQUIREMENTS

10.1 General Electrical Requirements

10.2 Electrical Equipment

10.3 Rear DOT Lighting

10.4 Taillights, Brake Lights

10.5 Turn Signal Lights

10.6 Back Up Lights

10.7 License Plate Bracket and Light

10.8 Rear Upper Marker Lights

10.9 Cluster/Clearance Lights and Reflectors

10.10 Rear Directional Light Bar

10.11 Scene Lights

10.12 Compartment Lights

10.13 Hose Bed Area Lighting

11 — ELECTRICAL SYSTEM PERFORMANCE TEST, LOW-VOLTAGE

11.1 Test Requirement

11.2 Test Sequence

11.3 Reserve Capacity Test

11.4 Alternator Performance Test at Idle

11.5 Alternator Performance Test at Full Load

11.6 Low Voltage Alarm Test

11.7 Documentation

12 — APPARATUS FINISH

12.1 Body Finish Procedure

12.2 Apparatus Body Color

12.3 Chassis Finish

12.4 Striping

12.5 Cab and Body Lettering and Striping

12.6 Truck Identification Plate

13 — EQUIPMENT

13.1 Provided Equipment

13.2 Manuals and Drawings

13.3 Road Kit

13.4 Wheel Chocks

13.5 Tool Holders

13.6 Nozzle Mounts

14 — WARRANTY PROVISIONS

14.1 Fifteen Year Apparatus Warranty

14.2 Water Tank Warranty

15 — APPARATUS OPTIONS

15.1 Self-Contained Breathing Apparatus (SCBA) Seating

15.2 Spare SCBA Bottle Storage

15.3 Wheel Chock Storage Compartments

15.4 Chainsaw Bracket

16 — STANDARD VEHICLE MARKING DIAGRAM

Record of Revisions

Date Revision summary

July 2009 • Initial Release June 2010 • Revision

January 2011 • Revision February 2014 • Added Table of Contents

• Added Record of Revisions since January 2011

• Added requirement to maintain break-over angle

• Added auxiliary lighting to front of apparatus

• Deleted rear amber warning light

• Deleted requirement for three individual non-SCBA seats in the rear of cab interior

• Deleted Hi/Lo switch in cab console

• Deleted requirement to relocate chassis-mounted air tanks

• Revised requirement for height of vertical exhaust

• Added conspicuity tape to rear step

• Added maximum rung spacing and minimum width for hose bed access ladder

• Added rear seat(s) storage compartment

• Revised specification for rear compartment door (hose reel compartment)

• Added hydrostatic testing requirement for pump

• Clarified pump panel throttle authority requirements

• Clarified when pump shift indicator lights shall illuminate

• Added plumbing system test requirement

• Added parameters to pump operating instruction plate

• Revised specification for master discharge and intake pressure gauge

• Deleted “Gauge Drain” requirement

• Revised specification for in-cab gauge

• Added requirement to priming pump performance

• Revised connection to primer control from one line to two lines

• Changed #2 manual valve

• Added one LED scene light to rear of apparatus

• Revised compartment lights

Date Revision summary

• Revised apparatus warranty requirement to fifteen years April 2015 • April 2015 Revised distance of minimum 12 inches between rear ladder side rails exteriors

• Added under seat storage compartment dimensions

• Added requirement that under seat storage compartment floor shall be flat

• Revised specification for Pump Cooler/By-Pass

• Added standard vehicle marking drawing

• Revised pump cooler/pump bypass in its entirety

August 2015 • Updated Format

• Revised specifications for rear scene light and red lights

• Revised center console mounts

• Added specifications for rear scene light and red lights

• Deleted standalone rear scene lights and red lights

• Added brand name or equivalents specification

• Updated engine status center type

February 2016 • Updated Format

• Amended cab step wheel chock storage compartment

• Amended rear cab step storage to passenger side rear cab step

• Removed requirement for flat cab

• Removed under-seat storage dimensions to account for OEM manufacturer’s design

• Minor modifications to numbering

• Added Standard Vehicle Marking Diagram

• Modified apparatus length NTE 306 inches

• Added additional requirements to the pump shift indicator lights

• Added additional requirements to the rear mounted operator’s panel

• Added required testing – Pump Indicator Lights

• Added required testing – Engine Speed Advancement Interlock

• Added table – Indicator Light Test Conditions and Verifications

January 2017 • Amended pump drive unit requirements to include gearbox mounting

• Amended DOT and emergency warning lighting

• Added multiplexing

Date Revision summary

• Added front license plate bracket

• Added rear view camera

• Removed pressure relief valve

February 2018 • Revised Chapter 1 in its entirety

• Revised pump cooler/pump bypass in its entirety

• Amended rear view backup camera

• Added tire pressure monitoring system

• Amended compartmentation requirements

• Amended body design requirements

• Amended compartment door requirements

• Amended body construction requirements

• Amended body subframe requirements

• Amended electronic siren and controller

• Amended traffic warning system requirements

• Amended battery master switch

• Revised key portions of Chapter 5

• Amended wheel chock storage

• Amended dunnage compartments

• Revised numerous sections of Chapter 6

• Amended forward upper zone a/b/d lightbar

• Amended zone C warning lights

• Amended scene lights

• Amended rear side cab step storage

• Revised pump general info

• Revised pump shaft

• Revised pump impeller

• Revised pump body and seals

• Revised pump drive unit construction

April 2019 • Amended upper zone C warning lights

• Amended aft lower zone B/D warning lights

• Amended lower zone C warning lights

• Added jump start stud location

October 2020 • Amended electronic siren controller requirements

Date Revision summary

• Amended traffic warning system requirements

• Amended body design requirements

• Amended taillight and turn signal requirements

• Amended scene light requirements

• Amended directional light bar requirements

January 2022 • Converted “Apparatus Body Only Specification” to Turnkey Specification

• Revised back up alarm requirements

• Added connected engine diagnostic system

• Removed map light

• Updated radio to Bluetooth

• Added “do not move apparatus warning light”

October 2022 • Revised Tire Pressure Monitoring System (TPMS) March 2023 • Revised back up alarm

• Changed NFPA 1906 to NFPA 1900 [Future revisions] • This space is reserved for future revisions.

1 — General

1.1 General Statement

1.1.1 The intent of this specification is to provide a, four-door (33,000 GVWR Model 326, 37,000 GVWR Model 346), crew cab fire engine with 600 gallons of usable water. This specification is for the two-wheel drive model (Model 326) and the four-wheel drive model (Model 346).

1.2 NFPA 1900 Compliance

1.2.1 The apparatus described in this specification shall be compliant with the requirements of NFPA 1900, latest edition, except where noted. Any deviations from NFPA 1900 shall be noted in this specification or shall be approved in writing by the Government.

1.3 Weight Requirement

1.3.1 The in-service weight shall not exceed 90% of the front axle GAWR and 20,000 lbs. on the rear axle when:

1.3.2 fully loaded with water, foam, and fuel

1.3.3 with 250 pounds per seat, and

1.3.4 2300 pounds of equipment evenly distributed in the storage compartments

1.4 Height Requirement

1.4.1 Apparatus body height shall not exceed the chassis height. Completed apparatus height shall not exceed 125 inches, including the exhaust stack and light bar, unless approved by the Government.

1.5 Tilt Test

1.5.1 The apparatus shall pass a tilt test at the estimated in-service weight in accordance with NFPA 1900 tilt test criteria prior to acceptance by the Government.

1.6 Ramp Break-Over Angle

1.6.1 The ramp break-over angle shall be maintained with the installation of the fire package.

1.7 Apparatus Body Height

1.7.1 The apparatus body height shall be closely matched to the chassis height.

1.8 In-Service Weights and Center of Gravity

1.8.1 The apparatus builder shall submit estimated in-service weights (minus equipment) for the completed apparatus, including the front axle, rear axle, and combined weight.

1.8.2 The apparatus builder shall submit estimated horizontal and vertical center-of-gravity for the completed apparatus.

1.8.3 The apparatus builder shall submit estimated front axle and rear axle weight distribution percentages, including front to rear axle ratio.

1.9 Specification Deviations

1.9.1 Deviation from the chassis or apparatus body specifications shall not be allowed without prior written approval. Any requested deviations must be submitted in writing to the Government. Verbal requests will not be considered.

1.10 Brand Name or Equivalent Products

1.10.1 Products equivalent to the brand name components specified herein may be approved by the Government. Equivalent products shall not be used unless approved in writing by the Government prior to contract award and documented in the resultant contract. After the contract award, approvals for equivalent products may be considered, and if approved, shall be documented in writing by the Government.

2 — Chassis Requirements FOR REFERENCE ONLY

2.1 Wheelbase

2.1.1 Model 326

2.1.1.1 185 inches

2.1.2 Model 346

2.1.2.1 193 inches

2.2 Cab to Axle

2.2.1 74 inches

2.3 After Frame

2.3.1 63 inches

2.4 Tow Hooks

2.4.1 Front, two; inside rail; frame mounted

2.5 Frame Rails

2.5.1 Heat treated alloy steel; Minimum resistance bending moment (RBM) of 1,400,000 inch-pounds; 120,000 pounds per square inch yield. The frame shall not reduce the GVWR.

2.6 Bumper, Front

2.6.1 Steel; swept back; powder coated Argent Gray

2.7 Frame Extension

2.7.1 Integral or bolt-on, 8 to 14 inches in front of grille, delete front engine power take off (PTO) capability

2.8 Axle, Front

2.8.1 Non-Driving (Model 326)

2.8.1.1 12,000 pound capacity (Meritor™ MFS-12-143A, or equivalent)

2.8.2 Driving (Model 346)

2.8.2.1 14,000 pound capacity (Meritor™ MX-14-120, or equivalent)

2.9 Suspension, Front

2.9.1 Model 326

2.9.1.1 Spring; taper leaf; parabolic; 12,000 pound capacity; with shock absorbers

2.9.2 Model 346

2.9.2.1 Spring; taper leaf; parabolic; 14,000 pound capacity; with shock absorbers

2.10 Brake System, Dual Air

2.10.1 Includes:

2.10.1.1 Front brakes: 16.5 inches by 5 inches; S-Cam type; with 20 square inch MGM™ or equivalent long stroke brake chambers

2.10.1.2 Rear brakes: 16.5 inches by 7 inches; with MGM™ or equivalent TR3030 long stroke brake chamber and heavy duty spring actuated parking brake

2.10.1.3 Dust shields; front and rear axles

2.10.1.4 Slack adjusters; front and rear; automatic

2.10.1.5 Drain valve; twist type

2.10.1.6 Drain valve (Berg™, or equivalent); manual; with chain

2.10.1.7 Gauges; located in cab instrument panel; "Air 1" and "Air 2"

2.10.1.8 Air dryer (Bendix™ AD-IP, or equivalent); with heater

2.10.1.9 Brake lines; color and size coded; nylon

2.10.1.10 Parking brake valve; with yellow knob; located on cab instrument panel

2.10.1.11 Air Brake ABS: Full vehicle wheel control system (4-channel) (Bendix™ Antilock Brake System, or equivalent)

2.10.1.12 Air compressor (Bendix™ Tu-Flo 550, or equivalent); 13.2 cubic feet per minute capacity

2.10.1.13 Spring brake modulator valve

2.11 Steering Column

2.11.1 Tilting

2.12 Steering Wheel

2.12.1 2-spoke; 18 inch diameter; black

2.13 Steering Gear

2.13.1 Power (Sheppard™ M-100, or equivalent)

2.14 Exhaust

2.14.1 Switchback exhaust; vertical tailpipe; after-treatment device; frame mounted outside right frame rail under cab, includes vertical tailpipe and guard

2.15 Electrical System

2.15.1 12 volt

2.15.2 Includes:

2.15.2.1 Headlights; two; LED if available

2.15.2.2 Horn; electric; single

2.15.2.3 Horn; air accommodation package; less horn

2.15.2.4 Starter switch; electric; key operated

2.15.2.5 Headlight dimmer switch integral with turn signal lever

2.15.2.6 Turn signal switch; self-canceling

2.15.2.7 Windshield wiper; 2-speed; integral with turn signal switch; with wash/intermittent feature

2.15.2.8 Circuit breakers; manual reset; replaces all fuses except for 5 amp

2.15.2.9 Wiring; chassis; color coded and continuously numbered

2.16 Alternator

2.16.1 12 volt direct current; 240 amp capacity; Leece-Neville™ 14923PA, or equivalent)

2.16.2 2.4 inch diameter alternator pulley

2.17 Battery System

2.17.1 Two or three; 1950 minimum cold cranking amps total; maintenance-free; steel battery box;

mounted left side under cab

2.17.2 Jump start stud; remote mounted; driver side; final location to be approved by the Government. Mounting within the wheel well shall not be accepted.

2.18 Radio

2.18.1 AM/FM stereo with Bluetooth and weather band; two coaxial speakers

2.19 Starter

2.19.1 12 volt direct current (Leece-Neville™ M130D, or equivalent); with thermal over-crank protection

2.20 Grille

2.20.1 Stationary; chrome

2.21 Front End

2.21.1 Tilting, fiberglass; with rubber fender extensions

2.22 Engine

2.22.1 Diesel; 50 state compliant; 330 horsepower; 1000 pound foot torque; Cummins L9 Fire Service Engine. No emissions related vehicle speed or engine torque inducements or de-rates.

2.22.2 Includes:

2.22.2.1 Air cleaner; dual element, standard with inner cone

2.22.2.2 Fuel/water separator and fuel filter in a single assembly, with water-in-fuel sensor and heater

2.22.2.3 Block heater; 120 volt/1250 watt (Phillips™, or equivalent)

2.22.2.4 Fan drive (Horton Drivemaster™, or equivalent); two speed; direct-drive, manual fan drive override

2.22.2.5 Indicator, low coolant level with audible alarm

2.22.2.6 Ember screens

2.22.2.7 Engine air intake; hood-mounted. Must isolate the entire air intake system including hood cavity. Air filter housing ember screens may be used in addition to this requirement but are not acceptable as a replacement. Must meet NFPA 1900 requirements.

2.22.2.8 Cabin air intake; prevents embers larger than 0.039 inches from entering the cabin

2.22.2.9 Bug screen, mounted behind grill

2.22.2.10 Engine compression brake

2.22.2.11 Brake light turns on when engine compression brake is activated

2.22.2.12 Expanded engine temperature effects to allow higher engine temperature operating ranges without shutdown

2.22.2.13 Disable idle shut down feature

2.22.2.14 Disable engine coolant temperature shutdown protection feature

2.23 Radiator

2.23.1 The chassis cooling system shall be capable of maintaining the normal engine temperature operating range at full engine load at 0 miles per hour.

2.24 Transmission, Automatic

2.24.1 Model 326

2.24.1.1 Allison™ 3500 EVS_P; wide ratio; 6 speed; with oil level sensor; with PTO provision;

less retarder, or equivalent

2.24.2 Model 346

2.24.2.1 Allison™ 3000 EVS_P; close ratio; 5 speed; with overdrive; with oil level sensor; with PTO provision; less retarder

2.25 Transfer Case (Model 346 Only)

2.25.1 Two speed; 10,000 pound-foot capacity (Meritor™ T-4210 2, or equivalent), without PTO provision

2.25.2 Includes:

2.25.2.1 Oil cooler: remote mounted

2.25.2.2 Electric over air control

2.26 Transmission Controls

2.26.1 T-bar type; for Allison 3000 and 4000 transmissions; cab dashboard mounted

2.27 Axle, Rear

2.27.1 Model 326

2.27.1.1 Single; 21,000 pound capacity, Meritor™ MS-21-14X-4DCR, or equivalent

2.27.1.2 Includes:

• Differential; locking, driver-controlled

• Drain plug, magnetic, for single rear axle

• Gearing for 75 miles per hour maximum (See 2.33—Speed Limitation)

• When the apparatus is driven over 15 miles per hour the driver-controlled rear locking differential shall automatically disengage and shall not automatically re-engage when driven below 15 miles per hour

• Dust shield

2.27.2 Model 346

2.27.2.1 Single; 23,000 pound capacity, Meritor™ RS-23-160, or equivalent

2.27.2.2 Includes:

• Differential; locking, driver-controlled

• Drain plug, magnetic, for single rear axle

• Gearing for 75 miles per hour maximum (See 2.33—Speed Limitation)

• When the apparatus is driven over 15 miles per hour the driver-controlled rear locking differential shall automatically disengage and shall not automatically re-engage when driven below 15 miles per hour

• Dust shield

2.28 Suspension, Rear

2.28.1 Model 326

2.28.1.1 Spring; single; 23,500 pound capacity; with 4,500 pound auxiliary rubber spring; with shock absorbers

2.28.2 Model 346

2.28.2.1 Spring; single; 31,000 pound capacity; with 4,500 pound auxiliary rubber spring; with shock absorbers

2.29 Fuel Tank

2.29.1 Capacity: 70 gallon single tank; non-polished aluminum; D or rectangle style; top draw;

mounted left side under cab. No part of the fuel tank or diesel exhaust fluid tank shall extend past the back of the cab; maximum ground clearance possible

2.30 Diesel Exhaust Fluid Tank

2.30.1 Capacity: A diesel exhaust fluid (DEF) tank will be provided in a storage capacity ratio to meet the requirements for the provided fuel tank. Mounted under the cab, with no part of the DEF tank extending past the back of the cab; maximum ground clearance possible

2.31 Cab

2.31.1 Conventional 6-person crew cab

2.31.2 Includes:

2.31.2.1 Clearance lights; five; flush-mounted

2.31.2.2 Exterior grab handles; three; aft of cab doors; two driver's side of cab; one passenger's side of cab (due to exhaust pipe); with rubber insert

2.31.2.3 Interior grab handles; seven; passenger's side front and both rear cab doors

2.31.2.4 Exterior cab steps; meet NFPA 1900; eight; two steps per cab door; maintain ground clearance

2.31.2.5 Mirrors; exterior; two; rectangular; Must meet FMVSS 111 specifications; with breakaway type mounting brackets; heated heads thermostatically controlled, power both sides; with light-emitting diode (LED) clearance lights

2.31.2.6 Electric window controls; all four outboard seating positions

2.31.2.7 Gauge cluster, English with electronic speedometer; tachometer; oil pressure; coolant temperature; fuel level; voltmeter; washer fluid level

2.31.2.8 Warning system; low fuel level, low oil pressure, high coolant temperature, low voltage

2.31.2.9 Gauge, transmission temperature

2.31.2.10 Gauge, applied air

2.31.2.11 Gauge; air cleaner restriction

2.31.2.12 Seat, driver's and passenger's; National™ 2000 or equivalent; high back; vinyl; air suspension; air lumbar; arm rest on inboard side; seatbelt sensor system

2.31.2.13 Seat; rear bench; full width, vinyl; with fixed back and two outboard integral headrests

2.31.2.14 3-point seat belts; driver's & passenger's & outboard rear cab seats (total of four); Red or orange in color

2.31.2.15 2-point seat belt; center rear seat (total of one); red or orange in color

2.31.2.16 Air conditioner; with integral heater and defroster

2.31.2.17 Fresh air filter for HVAC; protected by ember guard

2.31.2.18 Factory tinted glass; 50-state compliant

2.31.2.19 Dome light with automatic dimming, door activated and push ON/OFF

2.31.2.20 Overhead storage console with nets; CB pocket; pearl gray interior

2.31.2.21 Deluxe cab interior trim

2.31.2.22 Molded plastic door trim panels

2.31.2.23 Molded plastic storage pocket; driver's and passenger's front cab doors

2.31.2.24 Padded cloth headliner

2.31.2.25 Black rubber floor covering

2.31.2.26 Vinyl sun visors

2.31.2.27 Cab suspension; air bag type

2.31.2.28 Accommodation package for fog lights

2.31.2.29 Single color cab exterior finish paint, 5032 “Forest Service Green”

2.32 Tires and Wheels

2.32.1 Steel disc wheels; painted white; with 10-stud pattern; 8.25 inch by 22.5 inch DC rims; hub piloted

2.32.2 Tires Front: 12R22.5 Michelin XZE, or equivalent; load range H; 16 ply

2.32.3 Tires Rear: 12R22.5 Michelin XDN-2, or equivalent; load range H; 16 ply

2.32.4 Included with chassis order, one spare wheel and one spare tire matching the wheels and front tires, delivered affixed to the cab and chassis.

2.33 Speed Limitation

2.33.1 The vehicle speed shall be speed governed to the NFPA 1900 requirement of 68 miles per hour.

2.34 Connected diagnostics

2.34.1 A connected diagnostics system shall be provided. Connected diagnostics shall provide a wireless connection to the engine systems to provide immediate diagnosis of engine system fault alert and clear recommendations regarding continued vehicle opertation or the need for immediate service.

2.34.2

3 — Chassis Electrical Requirements

3.1 Chassis Electrical Additional Equipment and Modifications

3.1.1 The apparatus chassis shall be equipped with a heavy-duty 12 volt direct current (VDC) negative ground electrical system. The electrical system shall include all parts, components, switches, relays, wiring, and other devices required to assure complete, consistent and proper operation of the completed apparatus. Wiring shall be routed and/or protected to eliminate exposure to moving parts or debris.

3.1.2 All lights are required to comply with Federal Government Codes for vehicles of this size and design shall be provided and installed. These lights shall include headlamps and front turn signals with hazard switch, cab marker and clearance lights, back up lights, stop-turn-tail and license plate lights.

3.1.3 All switches for the warning lights and other electrical equipment shall be mounted on a separate switch panel located on the center console in the cab interior.The switches shall be functionally laid out, properly identified and shall be located within easy reach of both the driver and the officer. The warning light system shall have a “master” switch, which shall allow for the pre-selection of all warning lights. All switches shall be of a heavy-duty design.

3.1.4 The following additional electrical equipment shall be installed on, and modifications performed to, the specified cab and chassis by the apparatus builder:

3.2 Battery Master Switch

3.2.1 One battery master body disconnect switch shall be provided in the cab. The switch shall be rated for 175 amps continuous duty and 800 amps intermittent duty. The switch shall be properly labeled “ON/OFF” and located on the floorboard to the left side of the driver’s seat and placed as far aft as possible to protect against accidental actuation. A Cole Hersee brand™ brand, Model #M-2484-16, with a Model #82065 switch plate “Off/On” label meets the labeling requirement. The switch shall be positioned so to not impact the driver seat or operation of the vehicle. Terminals shall not be exposed but protected from damage and inadvertent contact.

3.2.2 An OEM chassis battery master switch may be installed in lieu of item in 3.2.1.

3.3 Battery “On” Indicator Light

3.3.1 One “Battery On” indicator light, with a green lens, shall be provided on the dashboard in the cab interior within view of the driver’s seating position. This light shall illuminate anytime the battery switch is turned to the “ON” position and the brightness shall dim automatically when the chassis headlights are turned on. The brightness of light shall not impair the driver's ability to see and operate the vehicle.

3.4 Electronic Control Module Programming

3.4.1 The cab and chassis electronic control module shall be programmed as required to allow the use of the original equipment manufacturer's cruise control feature as a manually controlled fast idle and as a backup to the pump operator’s panel throttle.

3.5 Back Up Alarm

3.5.1 One solid state back up alarm shall be provided at the rear of the apparatus protected from impact and debris. The back-up alarm shall be wired to the reverse circuit of the transmission and shall provide an audible alarm to the rear of the apparatus when reverse gear is selected. The alarm shall have a volume of 87 to 112 decibels while in operation.

The backup alarm cone shall be mounted in a manner to prevent the accumulation of dust and debris. The alarm shall have a disconnect plug for easy replacement.

3.6 Ground Lights

3.6.1 Four 4-inch clear LED lights shall be provided under the vehicle's perimeter; on the chassis steps, ground-facing with two on each side. These lights shall be wired to the cab door switches and a switch on the cab center console so that the light will turn on when a cab door is opened or when the vehicle is placed in “blocking mode.” The vehicle is in blocking mode when the vehicle’s transmission is in “Park” with the parking brake set and the emergency master switch turned on with the forward-facing takedown lights off. The ground lighting “OFF” delay will be synchronized with the chassis exterior courtesy lighting delay.

3.7 Antennas

3.7.1 Four antenna bases shall be supplied and mounted on the cab roof as specified. The antenna cables shall be routed to the cab interior, terminating at location of radio mounting bracket.

3.8 Radio Pre-Wire

3.8.1 The chassis cab interior shall be wired with battery power, battery ground, switched power, and radio rebroadcast wires to the siren or PA, and labeled to simplify USFS radio installation. The radio shall be wired to reduce the FM radio volume when the GMH radio is keyed.

3.9 Auxiliary Lighting

3.9.1 A pair of white LED auxiliary lights shall be installed in the center bumper cutout, mounted to the front surface of the bumper hose tray, on either side of the license plate location.

They shall be capable of being adjusted for both elevation and azimuth. The distance between the two lights shall be maximized. Each light shall produce a minimum of 3000 lumens and be equipped with a diffused lens capable of projecting light with flood pattern.

The maximum size of each light shall be 3¼ inches high by 3¼ inches wide by 3¼ inches deep and shall be equipped with an integral mounting bracket and wiring harness pigtail with connector. OEM chassis wiring and dash switch shall be used for installation if so equipped; otherwise, the lights shall be installed with a relay and dash-mounted switch. Any mounting fasteners used for these lights shall not damage the hose stored in the bumper hose tray. The dash switch shall be labeled “AUXILIARY LIGHTS, OFF HIGHWAY USE ONLY.” Rigid Industries™ Dually D2 Diffusion lights, or equivalent, shall be installed.

3.10 Multiplex System

3.10.1 A multiplexed solid-state management system for controlling the electrical system devices shall be provided. The system shall be fully programmable, and capable of performing load management functions, system monitoring and reporting. All electrical circuits and wiring shall be rated at 125% of the maximum load being imposed. Hale™ Class 1® ES-Key, Hale™ Class 1® Supernode, and Welden™ V-MUX® multiplexing systems meet this requirement.

3.11 Rear View Backup Camera System

3.11.1 A rear-view backup camera and display shall be provided. The display shall have a minimum display measurement of 7 inches diagonally and be factory installed in the dash. If an OEM camera system is not available, the builder shall propose the make and model of system for approval by the Government. The proposed system shall be installed in-dash unless written approval is approved by the Government. The backup camera shall be high durability and able to withstand harsh vibration; IP69K rated; and able to withstand 7Gs of force. The camera shall be shipped loose for installation by the apparatus builder.

Combined AM/FM/WX radio and backup display systems are acceptable if approved in writing by the Government.

3.12 Tire Pressure Monitoring System (TPMS)

3.12.1 If not provided by the chassis manufacturer, a tire pressure monitoring system shall be installed. Aftermarket tire pressure monitoring systems shall be approved by the government prior to installation. Considerations for the approval of aftermarket solutions will be quality, durability, warranty, repair service, and savings to the Government.

3.13 Jump Start Stud Location

3.13.1 Jump start stud; remote-mounted; driver side; final location to be approved by the Government. Mounting within the wheel well shall not be accepted. Studs shall be clearly marked and identified.

4 — Traffic Warning Systems

4.1 Traffic Warning Systems Requirements

4.1.1 Requests for equivalent products shall be considered. Considerations for the approval of equivalent products will be quality, durability, warranty, repair service, and savings to the Government. Any requests for substitution of equivalent products must be approved by the Government in writing.

4.2 Electronic Siren and Controller

4.2.1 The manufacturer shall supply and install one electronic siren and digital control panel with 6 auxiliary buttons, 4 position slide switch, 6 position rotary speaker tone selector, traffic director control button, manual siren button, and airhorn button in the cab center console.

The control panel shall be flush mounted. The location of the controller shall be convenient to both the driver and the officer. The siren shall have four basic siren tones: manual, wail, yelp, and hi-lo. The “emergency master” switch shall power the controller. The manufacturer shall install a Tomar brand, 948L-SIREN-R, or equivalent.

4.2.2 The manufacturer shall program and label the electronic siren and digital control panel’s auxiliary buttons as follows:

• Auxiliary Switch “1” – Left Alley

• Auxiliary Switch “2” – Right Alley

• Auxiliary Switch “3” – Front Flood

• Auxiliary Switch “4” – Rear Scene

• Auxiliary Switch “5” – Left Scene

• Auxiliary Switch “6” – Right Scene

4.2.2.1 Additional auxiliary switches shall be provided separate from the siren controller:

• Auxiliary Switch “7” - Ground Lights

• Auxiliary Switch “8” – Cabin Lighting

4.3 Speaker

4.3.1 The manufacturer shall supply and install one 100 W siren speaker mounted behind the driver’s side of the front bumper. The manufacturer shall wire the speaker to the specified electronic siren controller. The manufacturer shall wire the lights to the Tomar brand, model, 948L-SIREN-R siren controller located on the cab center console. The manufacturer shall install Tomar brand, model SPK-100 speaker, or equivalent.

4.4 Forward Upper Zone A/B/D Lightbar

4.4.1 The manufacturer shall supply and install one LED lightbar on the cab roof, facing forward.

The lightbar shall be 58 inches wide. The lightbar shall be constructed of extruded aluminum with cast aluminum end caps. The aluminum extrusion shall be clear anodized.

All lightbar LED modules shall be waterproof using a vibration-welding sealing. The lightbar LED modules shall have total internal reflection (TIR) collimator optics to prevent stray warning light. The lightbar shall have one waterproof internal controller to control the entire lightbar. The internal lightbar controller shall feature CA-13 compliant flash rates and two steady-burn LED modules. The lightbar LED modules facing forward and at each end shall be able to override to steady white scene lights independently of each other. The manufacturer shall wire the lights to the Tomar brand, model, 948L-SIREN-R siren controller located on the cab center console. The manufacturer shall install Tomar brand, model 970-581-0601-1, or equivalent.

4.4.2 The lightbar shall consist of the following:

• Eight 12LED warning modules facing forward, with six red LEDs, six white LEDs and clear Lexan lenses

• Two 12LED forward facing single-color, steady burning, with twelve red LED and clear Lexan lenses

• Four 24LED module at each corner with twelve red LEDs, twelve white LEDs and clear Lexan lenses

• Two 3LED modules forward facing spot scene lights with an 8.5-degree beam pattern with clear Lexan lenses

• One 3LED spot alley module at each end cap.

4.4.3 The manufacturer shall permanently mount the lightbar to the cab roof and wire it to the “Lightbar” switch in the cab center console.

4.4.4 Diagram LED Lighting Locations and Flashing/Steady Configuration

Figure 1—Diagram of LED Lighting locations and the flashing/steady configuration

4.4.5 The manufacturer shall mount the lightbar in a position that maximizes the height above the apparatus cabin.

4.4.6 The manufacturer shall mount the lightbar horizontally, not pointed upwards or downwards along the apparatus roof cabin. The manufacturer can use modified feet or shims, but the lightbar mount must also adhere to section 4.4.3.

4.5 Aft Upper Zone B/D Warning Lights

4.5.1 The manufacturer shall supply and install two 3-inch by 7-inch dual color LED warning lights with mounting flanges, side-facing, one per side on the upper aft corners of the apparatus.

The warning lights shall consist of twenty-four LEDs, twelve LEDs red in color, twelve LEDs white in color, and with clear Lexan lens. The lights shall be waterproof using a vibration-welding sealing process. The lights shall have TIR collimator optics to prevent stray warning light. The lights shall flash red and white at 75 flashes per minute (FPM) in a simultaneous flash pattern. The warning light shall have the ability to override to steady burn white for use as an additional scene light. The manufacturer shall wire the lights to the Tomar brand, model, 948L-SIREN-R siren controller located on the cab center console. The manufacturer shall install Tomar brand, model R37D-W-RW-02, or equivalent.

4.6 Upper Zone C Warning Lights

4.6.1 The manufacturer shall supply and install two 7-inch by 9-inch dual color multi-function warning/scene LED lights with mounting flanges, rear facing, one per side, on the upper outboard rear of the apparatus. The multi-function lights shall consist of twenty-four LEDs with clear Lexan lenses. The upper half of the lights shall have twelve red warning LEDs with horizontal oriented optics. The lower half of the lights shall have twelve white LEDs with 13-degree angled down optics. The lights shall be waterproof using a vibration-welding process. The lights shall have TIR collimator optics to reduce stray warning light. The manufacturer shall wire the red LED lights to the Tomar brand, model, 948L-SIREN-R siren controller located on the cab center console. The manufacturer shall wire the white LED lights “Rear Scene” button on the Tomar brand, 984L-SIREN-R siren controller located on the cab center console and to the “Rear Scene” switch on the rear pump operator's panel.

The manufacturer shall install Tomar brand, model R79LVD13-RW-01 and R79LVD13-RW- 02, or equivalent.

4.7 Lower Zone A Warning Lights

4.7.1 The manufacturer shall supply and install two 3 inch by 7 inch dual color LED warning lights with mounting flanges on the front of the apparatus, forward-facing, one per side on the lower outboard corners of the cab grille. The warning lights shall consist of twenty-four LEDs, twelve LEDs red in color, twelve LEDs white in color, and with clear Lexan lens. The lights shall be waterproof using a vibration-welding sealing process. The lights shall have TIR collimator optics to prevent stray warning light. The lights shall flash red and white at 75 FPM in a flicker flash pattern. The lights shall flash in opposite phase of each other when blocking the roadway. The manufacturer shall wire the lights to the Tomar brand, model, 948L-SIREN-R siren controller located on the cab center console. The manufacturer shall install Tomar brand, model R37D- RW-03 and R37D-W-RW-04, or equivalent.

4.8 Forward Lower Zone B/D Warning Lights

4.8.1 The manufacturer shall supply and install two dual color LED warning lights with mounting flanges on the tilt hood of the apparatus, side facing, one per side, as low and as far forward as possible on the sides of the hood. The warning lights shall consist of twenty-four LEDs, twelve red LEDs, twelve white LEDs, and with clear Lexan lenses. The warning light shall flash red at 75 FPM. The warning light shall have the ability to override to steady burn white for use as an additional scene light. The lights shall be waterproof using a vibration-welding sealing process. The lights shall have TIR collimator optics to prevent stray warning light. The manufacturer shall wire the lights to the Tomar brand, model, 948L-SIREN-R siren controller located on the cab center console. The manufacturer shall install Tomar brand, model RSDV13-RW-01, or equivalent.

4.9 Aft Lower Zone B/D Warning Lights

4.9.1 The manufacturer shall supply and install two 3-inch by 7-inch dual color LED warning lights with mounting flanges on the front of the apparatus, side-facing, one per side on the lower aft corners of the apparatus. The warning lights shall consist of twenty-four LEDs, twelve LEDs red in color, twelve LEDs white in color, and with clear Lexan lens. The lights shall be waterproof using a vibration-welding sealing process. The lights shall have TIR collimator optics to prevent stray warning light. The lights shall flash red and white at 75 FPM in a simultaneous flash pattern. The warning light shall have the ability to override to steady burn white for use as an additional scene light. The manufacturer shall wire the lights to the Tomar brand, model, 948L-SIREN-R siren controller located on the cab center console. The manufacturer shall install Tomar brand, model R37D-W-RW-02, or equivalent.

4.10 Lower Zone C Warning Lights

4.10.1 The manufacturer shall supply and install two 3-inch by 7-inch dual color LED warning/back-up lights on the rear of the apparatus, rear-facing, one per side on the lower rear of the apparatus above the rear step in the bottom position of the common housing with the DOT lights. The warning lights shall consist of twenty-four LEDs, twelve LEDs red in color, twelve LEDs white in color, and with clear Lexan lens. The lights shall be waterproof using a vibration-welding sealing process. The lights shall have TIR collimator optics to prevent stray warning light. The lights shall flash red and white at 75 FPM in a simultaneous flash pattern. The warning light shall have the ability to override to steady burn white for use as a back-up light. The manufacturer shall wire the lights to the Tomar brand, model, 948L-SIREN-R siren controller located on the cab center console. The manufacturer shall install Tomar brand, model R37D-W- RW-01(right) and R37D-W-RW-02 (left), or equivalent.

4.11 Air Horn

4.11.1 One Buell™ brand, Model #1063, or equivalent, 15-inch air horn shall be provided and mounted under the hood on the passenger’s side. One-foot switch shall be provided on the driver's side cab floor, and one momentary pushbutton switch shall be provided on the upper right corner of the officer's side top surface of the cab center console.

4.12 Headlight Flasher

4.12.1 The manufacturer shall supply and install one solid-state headlight flasher wired for daytime operation. The flasher shall be a multipurpose type with a high beam activated cut out option. The manufacturer shall wire the flasher to the Tomar brand, model 948L- SIREN-R siren controller “Wig Wag” switch located on the cab center console, through the parking brake valve, so that it is disabled when the parking brake is applied. The manufacturer shall install Tomar brand, model HF-1 flasher, or equivalent.

5 — Chassis Additions and Modifications

5.1 Additional Equipment

5.1.1 The following additional equipment shall be installed on, and modifications performed to the specified cab and chassis by the apparatus manufacturer:

5.2 Apparatus Fluid Types and Quantities

5.2.1 A permanently mounted label, showing the recommended fluid types and quantities for the apparatus chassis and associated components, shall be provided in the apparatus cab interior near the driver’s seating position.

5.2.2 This label shall list the recommended fluid types and quantities for the following components:

• Chassis Engine Lubricant

• Chassis Engine Coolant

• Chassis Power Steering Fluid

• Chassis Transmission Fluid

• Chassis Drive Axle Lubricant

• Pump Gearbox Lubricant

5.3 Seating Capacity

5.3.1 A warning label, listing the seating capacity of the completed apparatus, shall be provided in the apparatus cab interior. This label shall be located so that it is visible from all seating positions.

5.3.2 This apparatus shall have a seating capacity of five personnel.

5.4 Seat Belts

5.4.1 3-point shoulder harness type seat belts shall be provided on all four outboard seating positions. The center rear seating position shall have a 2-point lap belt type seat belt.

5.4.2 All seatbelts shall be red or orange in color.

5.5 Seat Belt Warning

5.5.1 A warning label, stating: “DANGER- Personnel Must Be Seated And Seat Belts Must Be Fastened While Vehicle Is In Motion Or DEATH OR SERIOUS INJURY MAY RESULT” shall be provided in the apparatus cab interior. This label shall be located so that it is visible from all seating positions.

5.6 Vehicle Height Warning

5.6.1 A warning label listing the overall height, length and GVWR of the completed apparatus, shall be provided in the apparatus cab interior. This label shall be located so that it is visible from the driver’s seating position.

5.7 Final Stage Manufacturer Vehicle Certification

5.7.1 A Final Stage Manufacturer vehicle certification label shall be provided and installed in the apparatus cab driver’s door jamb area.

5.8 Noise Hazard Warning

5.8.1 A warning label, stating: “WARNING: Noise Hazards Occur During Siren Operation” shall be provided and installed in the apparatus cab interior. This label shall be located so that it is visible from all seating positions.

5.9 Air Filter Ember Protection Screen Warning

5.9.1 A warning label, stating: “This apparatus is equipped with an air filter ember protection screen; routine inspection is required” shall be provided and installed in the apparatus cab interior. This label shall be located so that it is visible from the driver’s seating position.

5.10 Do Not Move Apparatus Warning

5.10.1 One surface mounted red LED light shall be provided in the center cab console, at the top, or most forward position. The light shall flash whenever side compartment doors are open, and the parking brake is released. The light shall be wired directly into the door ajar switch and hazard circuit. The hazard warning light shall be marked with a label stating, “DO NOT

MOVE APPARATUS WHEN LIGHT IS ON.”

5.11 Cab Console

5.11.1 The cab shall be equipped with an operator's control console located between the front driver's and officer's air ride seats. This console shall be sized to accommodate customer-mounted radios. The console shall be fabricated from steel and painted with a matte black finish. The console shall be securely mounted to the cab floor. The driver’s and officer’s side panels for the center console shall be extended as a continuous piece outward at a 90-degree angle from the bottom of the console. The center console shall be secured using the inboard mounting studs of the driver’s and officer’s air ride seat bases. There shall be two attachment points on the left horizontal extension of the console under the driver’s seat base. There shall be two attachment points on the right horizontal extension of the console under the officers’ seat base.

5.11.2 The console shall contain the following controls and switches:

• One 2½-inch diameter backlit discharge pressure gauge, 0-600 psi

• One Fire Research Corporation™ brand, Model #WL2500, or equivalent, mini display tank level gauge

• One Tomar brand, model, 948L-SIREN-R or equivalent siren controller

• One flexible map light

• Four 12-volt power outlets

• One emergency master switch

5.12 Center Console Aft Storage

5.12.1 A compartment for storage of items, such as maps and hand-held radios, shall be provided and attached directly behind the center console. The storage compartment shall be fabricated from steel and painted with a matte black finish. The height and width shall not exceed the cab console, and the depth shall be approximately 8 inches The storage compartment shall be configured to be easily removable for access to the console inspection panel.

5.13 Chassis Manufacturer Grab Handle

5.13.1 One exterior chassis manufacturer grab handle shall be provided and installed aft of rear door; on driver’s side of cab; with rubber insert.

5.14 Front Tow Hooks

5.14.1 Two original equipment front tow hooks shall be supplied with the chassis from the chassis manufacturer.

5.15 Rear Tow Eyes

5.15.1 Two heavy-duty tow eyes shall be provided at the rear of the apparatus, below the rear step. The tow eyes shall be mounted to the chassis frame.

5.16 Front Bumper Extension

5.16.1 A front bumper extension shall be provided at the forward end of the chassis frame rails.

The bumper extension shall be covered with aluminum diamond plate. Support bracing shall be provided as required. The ends of the aluminum diamond plate cover shall be radiused and ground smooth.

5.16.2 When completed, the overall length of the apparatus shall not exceed 306 inches.

5.17 Hose Storage Tray

5.17.1 One hose storage tray shall be provided in the center of the front bumper extension. The storage tray shall be approximately 20 inches long by 7 inches wide by 12 inches deep.

5.17.2 The tray shall be provided with an expanded metal mesh floor to allow drainage and air circulation. An aluminum diamond plate cover shall be provided for the hose well. The cover shall be approximately 1-inch shorter than the length of the hose well to allow the front discharge hose to remain pre-connected to the front bumper discharge swivel with the cover closed.

5.17.3 The hose storage tray shall be capable of holding fifty feet of 1½-inch hose.

5.18 Front Fenders, Rubber

5.18.1 An extruded black rubber fenderette shall be installed on each front wheel well opening on the chassis tilt hood.

5.19 Mud Flaps

5.19.1 One pair of flexible rubber mud flaps shall be provided on both sides of the apparatus body behind the rear wheels. The mud flaps shall not bear company logo.

5.19.2 The mud flaps shall extend down far enough to be effective but shall not allow the flaps to become entangled with the rear tires when the apparatus is backing up.

5.20 Cab Steps, Batteries, and Air Tanks

5.20.1 All cab steps shall be modified in such a manner as to provide maximum ground clearance.

The driver’s side…