Attachment_001__ATPD-2395F_-_M870A4_Semitrailer_Lowbed_Construction_Equi....pdf

Comments, suggestions, or questions on this document should be addressed to U.S. Army RDECOM, Tank Automotive Research, Development and Engineering Center, ATTN: RDTA-EN/STND/TRANS MS #268, 6501 E. 11 Mile Road, Warren, MI 48397-5000 or sent by email to usarmy.detroit.rdecom.mbx.tardec-standardization@mail.mil. Since contact information can change, you may want to verify the currency of this address information using the ASSIST Online database at https://assist.dla.mil.

DISTRIBUTION STATEMENT A. Approved for public release.

NOT MEASUREMENT

SENSITIVE

ATPD-2395F

05 February 2015

SUPERSEDING

ATPD- 2395E

30 October 2014

PURCHASE DESCRIPTION

M870A4 SEMITRAILER, LOWBED,

CONSTRUCTION EQUIPMENT TRANSPORTER (SLCET) 40 TON

1. SCOPE

1.1 General Description. The M870A4 is a low-bed semitrailer with a rated payload of 40 tons (80,000 lbs). The M870A4 trailer is to be used to transport a variety of Engineering Construction Equipment (ECE), tracked and wheeled vehicles. The M870A4 will be employed for tactical use on primary roads, secondary roads, improved trails, and trails. The M870A4 will operate under worldwide climatic conditions in a military environment. The M870A4 shall satisfy the applicable standards of Society of Automotive Engineers (SAE), Department of Transportation (DOT), Federal Motor Vehicle Safety Standards (FMVSS), and Federal Motor Carrier Safety Regulations (FMCSR). The M870A4 shall be transportable by highway, rail, marine and air modes worldwide.

1.2 Components. The contractor shall make maximum use of parts, components, and assemblies currently provisioned within the Army Supply System, provided use of these items does not adversely impact cost or the attainment of required trailer performance levels. The contractor is encouraged to use off-the-shelf commercial components/material providing the performance (DOT and Army) and definition requirements specified herein are met, along with the paint/finish requirements specified herein.

2. APPLICABLE DOCUMENTS

ATPD-2395F

2.1 General. The documents listed in this section are specified in sections 3 or 4 of this PD. This section does not include documents cited in other sections of this PD or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements of documents cited in sections 3 and 4 of this specification, whether or not they are listed.

2.2 Government Documents.

2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the applicable issues of these documents are those current at the date of solicitation release.

INTERNATIONAL STANDARDIZATION AGREEMENTS

STANAG 4007 - Electrical Connectors between Prime Movers, Trailers and Towed

(Copies of these documents are available from http://nsa.nato.int/nsa/ or NATO Standardization Agency, North Atlantic Treaty Organization HQ, 1110 Brussels, Belgium, or as directed by the contracting officer.)

FEDERAL SPECIFICATIONS

MMM-A-181 - Adhesives, Phenol, Resorcinol or Melamine Base

FEDERAL STANDARDS

FED-STD-595/33446 - Tan 683A FED-STD-595/34094 - Green 383 FED-STD-595/37030 - Black

COMMERCIAL ITEM DESCRIPTION

A-A-50271 - Plate, Identification A-A-52611 - Valve and Valves Spuds, Caps, and Cores, Pneumatic Tire

DEPARTMENT OF DEFENSE SPECIFICATIONS

MIL-PRF-10924 - Grease, Automotive and Artillery MIL-DTL-53072 - Chemical Agent Resistant Coating (CARC) System

Application Procedures and Quality Control Inspection

MIL-DTL-64159 - Camouflage Coating, Water Dispersible Aliphatic Polyurethane, Chemical Agent Resistant

DEPARTMENT OF DEFENSE STANDARDS

MIL-STD-209 - Lifting & Tiedown Provisions MIL-STD-464 - Electromagnetic Environmental Effects

Requirements for Systems MIL-STD-642 - Identification Markings of Combat & Tactical

Transport Vehicles MIL-STD-810 - Environmental Engineering Consideration and

Laboratory Tests MIL-STD-889 - Dissimilar Metals MIL-STD-1179 - Lamps, Reflectors and Associated Signaling

Equipment for Military Vehicles MIL-STD-1180 - Safety Standards for Military Ground Vehicles MIL-STD-1366 - Transportability Criteria MIL-STD-1472 - Human Engineering

(Copies of these documents are available from https://assist.dla.mil/quicksearch/ or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.)

ARMY REGULATION

AR 70-38 - Research, Development, Test & Evaluation of Material for Extreme Climatic Conditions

(Copies of these documents are available from http://www.army.mil/usapa/index.html)

ARMY TECHNICAL BULLETIN

TB 43-0213 - Corrosion Prevention and Control, Including Rustproofing Procedures for Tactical Vehicles and Trailers

(Copies of this document are available from https://www.logsa.army.mil.)

2.2.2 Other applicable Government Documents, drawings, and publications. The following other Government documents, drawings, and publications form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract.

TACOM MANUAL

TACOM Administrator’s Manual (AM) for use with SAE J2014 Pneumatic Tires for Military Tactical Wheeled Vehicles

SURFACE DEPLOYMENT AND DISTRIBUTION COMMAND TRANSPORTATION

ENGINEERING AGENCY (SDDCTEA) PUBLICATIONS

TEA PAM 70-1 - Transportability for Better Deployability

(Copies of this pamphlet are available from http://www.tea.army.mil/pubs/pubs_order.htm or from Military Surface Deployment and Distribution Command Transportation Engineering Agency (SDDCTEA), 709 Ward Drive, Bldg. 1990, Scott AFB, IL 62225.)

DEPARTMENT OF TRANSPORTATION (DOT)

Title 49, Part 393 - Parts and Accessories Necessary for Safe Operation 49CFR393.40 - Required Brake Systems 49CFR393.41 - Parking Brake System 49CFR393.42 - Brakes Required on all Wheels 49CFR393.43 - Breakaway and Emergency Braking 49CFR393.45 - Brake Tubing and Hoses, Hose Assemblies and End

Fittings 49CFR393.47 - Brake Actuators, Slack Adjusters, Linings/Pads and

Drums/Rotors 49CFR393.52 - Brake Performance 49CFR393.53 - Automatic Brake Adjusters and Brake Adjustment

Indicators 49CFR393.55 - Antilock Brake Systems 49CFR393.70 - Coupling Devices and Towing Methods 49CFR393.86 - Rear Impact Guards and Rear End Protection 49CFR393.201 - Frames 49CFR393.207 - Suspension Systems

Title 49, Part 571 - Federal Motor Vehicle Safety Standards (FMVSS) 49CFR571.108 - Lamps, Reflective Devices, and Associated

Equipment 49CFR571.119 - New Pneumatic Tires for Motor Vehicles with a

GVWR of more than (10,000 pounds) and Motor- Cycles

49CFR571.120 - Tire Selection and Rims 49CFR571.121 - Air Brake Systems 49CFR571.223 - Rear Impact Guard 49CFR571.224 - Rear Impact Protection

(Copies of these documents are available from www.fdsys.gov or U.S. Government Printing Office, P.O. Box 979050, St. Louis, MO 63197-9000.)

2.3 Non-Government publications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of the documents are those cited in the solicitation or contract.

AMERICAN WELDING SOCIETY (AWS)

AWS A2.4 - Standard Symbols for Welding, Brazing, and Nondestructive Examination

AWS A3.0M/A3.0 - Standard Welding Terms and Definitions AWS B2.1/B2.1M - Base Metal Grouping for Welding Procedure and

Performance Qualifications AWS D1.1/D1.1M - Structural Welding Code – Steel AWS D1.2/D1.2M - Structural Welding Code – Aluminum AWS D1.3/D1.3M - Structural Welding Code – Sheet Steel AWS D1.6/D1.6M - Structural Welding Code – Stainless Steel

(Copies of these documents are available from www.aws.org or American Welding Society, 550 N.W. LeJeune Road, Miami, FL 33126.)

ASTM INTERNATIONAL

ASTM D610 - Evaluating Degree of Rusting on Painted Steel

Surfaces ASTM D1171 - Rubber Deterioration - Surface Ozone Cracking

Outdoors or Chamber

(Copies of these documents are available from www.astm.org or ASTM International, P.O. Box C700, West Conshohocken, PA 19428-2959.)

THE TIRE AND RIM ASSOCIATION, INC.

Tire and Rim Association Year Book

(Copies of this document are available from www.us-tra.org or The Tire and Rim Association, Inc., 175 Montrose West Avenue, Suite 150, Copley, OH 44321.)

SAE STANDARDS AND RECOMMENDED PRACTICES

SAE J267 - Wheels/Rims—Performance Requirements and Test

Procedures—Truck and Bus SAE J318 - Automotive Air Brake Line Couplers (Gladhands) SAE J534 - Lubrication Fittings SAE J560 - Seven-Conductor Electrical Connector for Truck-

Trailer Jumper Cable SAE J588 - Turn signal lamps for use on Motor vehicles less than 2032 MM in overall width SAE J682 - Rear Wheel splash and Stone Throw protection SAE J700 - Upper Coupler Kingpin – Commercial Trailers and

Semitrailers SAE J702 - Brake and Electrical Connection Locations – Truck

Tractor and Truck Trailer

SAE J848 - Fifth Wheel Kingpin, Heavy-Duty - Commercial Trailers and Semitrailers

SAE J1292 - Automobile, Truck, Truck-Tractor, Trailer and Motor Coach Wiring

SAE J1889 - L.E.D. Signal and Marking Lighting Devices SAE J2014 - Pneumatic Tires for Military Tactical Wheeled

Vehicles (Section A.7) SAE J2360 - Lubricating Oil, Gear Multipurpose (Metric)

Military Use

(Copies of these documents are available from www.sae.org or SAE Customer Service, 400 Commonwealth Drive, Warrendale, PA 15096-0001.)

ASSOCIATION OF AMERICAN RAILROADS (AAR)

Standard M-931-99 - Trailers for Intermodal Service

(The Association of American Railroads, 425 Third Street, SW, Suite 1000, Washington, DC 20024, www.railinc.com.)

2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a conflict between the text of this document and the references cited herein (except for related specification sheets), the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained.

3. REQUIREMENTS.

3.1 General Design. The subject army M870A4 is considered a tactical rear area support vehicle due to its mission profile, including some trail travel, under extreme climatic conditions (see 4.3.1).

a. All performance and definition requirements here in this PD are concurrent requirements (see 4.3.1).

b. The M870A4 shall have an expected Economically Useful Life (EUL) of 30 years (see 4.3.1).

c. Design will be such that maintenance and servicing can be accomplished keeping any new special tools or support equipment to a minimum. Any new special tools/support equipment added to the Army supply system must be approved by the ILS IPT (see 4.3.1).

3.1.1 Prime Movers. Prime movers shall include the M983 Light Equipment Transporter

(LET) series and M916 LET series tractors. References to prime movers in this document are inclusive of all models in the M983 LET and M916 LET series (see 4.3.1.1).

a. The M870A4 must also be capable of being towed by a commercial tractor within the limitations of the commercial tractor’s capabilities (see 4.3.1.1).

b. The M870A4 shall show no evidence of part failure, deformation, permanent set, or interference between parts when operated in accordance with its mission profile (see 4.3.1.1).

3.2 Vehicle Dimension Requirements. The M870A4 without payload, on level ground, shall conform to the dimensions specified in Table I (see 4.3.2).

Table I. Vehicle Dimension Requirements.

Overall length 48 feet maximum

Deck height 44.6 inches maximum

Overall width with outrigger brackets stowed 96 inches maximum

Overall width with outrigger brackets expanded 120 inches minimum Upper fifth wheel height (empty) from the ground to underside of upper 5th wheel plate.

64 +/- 1 inches

3.2.1 Overall Clearance. The angle of approach shall be no less than 15 degrees and the angle of departure shall be no less than 15 degrees (see 4.3.2).

3.2.2 Overall Length. The overall length of the M870A4 shall not exceed 48 feet when measured from the forwardmost to rearwardmost point on the M870A4 (see 4.3.2).

3.2.3 Vehicle Curb Weight. The M870A4 Vehicle Curb Weight (VCW) shall not exceed 21,000 lbs. The VCW is defined as the weight of the M870A4, with all accessories, attachments, Basic Issue Items (BII), and a full load of lubricants on board (see 4.3.2).

3.2.4 Gross Vehicle Weight. The Gross Vehicle Weight (GVW) of the M870A4 shall not exceed 101,000 lbs. The GVW is defined as the maximum payload (80,000 lbs) plus the VCW of the M870A4 (see 4.3.2).

3.3 Safety and Design.

a. The M870A4 and furnished accessories shall comply with all Federal Motor Vehicle Safety

Standards and Federal Motor Carrier Safety Regulations, applicable to a vehicle of this weight class at the time of manufacture, except 1) there shall be no license plate area and 2) the ABS warning light will be located on the front left corner of the trailer (see 4.3.3).

b. The M870A4 and furnished accessories shall comply with MIL-STD-1180 Safety Standards for Military Ground Vehicles (see 4.3.3).

c. The M870A4, parts and components shall be free of sharp projections and edges that may cause operator/maintainer injury. Operators and maintenance personnel shall not be unknowingly exposed to rotating or moving parts, hot surfaces, electrically energized components, components containing high pressures, or any other inherently hazardous components or systems. All hand holds and steps shall be an integral and permanent part of the M870A4. A moveable ladder, if provided, shall be stored in a readily accessible location.

All step surfaces and work areas shall be provided with a non-skid surface (see 4.3.3).

3.3.1 Side Slopes. The M870A4 in all load conditions when towed by its prime movers shall be capable of operating in both directions on a 10% side slope. The M870A4 shall not exhibit any fluid leaks while operating on side slopes (see 4.3.3.1).

3.3.2 Longitudinal Slopes. The M870A4 in all load conditions when towed its prime movers shall be capable of operating in both directions on a 20% longitudinal slope. The M870A4 shall not exhibit any fluid leaks while operating on longitudinal slopes (see 4.3.3.2).

3.3.3 Lateral Stability. The M870A4 in all load conditions when towed by its prime movers and operating on paved highways shall sustain a steady state 0.30g lateral acceleration without any of the wheels leaving the ground (see 4.3.3.3).

3.3.4 Lane Change. The M870A4, when towed by its prime movers, shall be capable of performing an emergency lane change maneuver at:

a. Curb weight at 40 miles per hour (mph) without any tires leaving the ground (see

4.3.3.4).

b. GVW at 20 mph without any tires leaving the ground (see 4.3.3.4).

3.4 Performance.

3.4.1 Turning Ability. The M870A4 at rated payload shall be capable of a 90 degree turn angle to the right and to the left at an intersection of two 30 foot wide roadways, wall-to-wall in one continuous movement when coupled to the prime movers without cramping, side-slipping, or damage to the M870A4 or the prime mover (see 4.3.4.1).

3.4.2 Tracking Ability. The M870A4 shall conform to the tracking requirements of 49CFR393.70 (a) when the axles are aligned and the M870A4 shall track in a straight line within 2 inches (see 4.3.4.2).

3.4.3 Payload. The M870A4 shall be capable of transporting the rated payload of 80,000 lbs. Payloads shall not cause any permanent deformation in the frame, gooseneck, or any other part. The M870A4 shall be suitable for the concentrated pin point, and localized stresses caused by mobile loads being loaded onto the M870A4 by tracks, track-pads, wheels, and any other non-evenly distributed loads that would be imparted onto the M870A4 by the equipment listed in Annex A. The M870A4 shall be capable of loading, transporting, and off-loading the equipment listed in Annex A (see 4.3.4.3).

3.4.3.1 Fifth Wheel Load. The load on the prime mover's fifth wheel shall not exceed 40,000 pounds when the M870A4 is at GVW or when carrying any of the equipment identified in Annex A (see 4.3.4.3.1).

3.4.4 Equipment and Vehicle Loading.

3.4.4.1 Front Loading. The M870A4 shall be capable of loading and off-loading all of the equipment listed in Annex A over the front of the trailer. The trailer shall be capable of loading operable and inoperable equipment in Annex A utilizing the prime mover’s winch or by push assist during loading. No part of the M870A4 shall interfere with the ability to load and off-load inoperable equipment utilizing only the prime mover’s on-board winch (see 4.3.4.4.1).

3.4.4.2 Rear Loading. The M870A4 shall have two rear loading ramps capable of withstanding the applied portion of the load during loading and off-loading the equipment in Annex A without permanent deformation. The rear loading ramps shall be adjustable to accommodate the loading and off-loading of the equipment listed in Annex A. The rear loading ramps shall accommodate the loading and off-loading of the Engineering Construction Equipment (ECE) in Annex A with the exception of the following: High Speed Compactor, Asphalt Paving Machine, Type I Vibratory Roller, Type II Vibratory Roller, Dual Steel-Wheeled Roller, and the Type I HYEX, Type II HYEX and Type III HYEX. The ramps shall be attached to the trailer on hinges that allow the ramps to be swung up for storage and travel. Adjustment of width of stowed and deployed ramps shall be possible by not more than two soldiers (see 4.3.4.4.2).

3.5 Operational Modes Summary (OMS)/Mission Profile (MP). The M870A4 shall be capable of operation over the operational modes and mission profile as defined in Table II (see 4.3.5).

Table II. OMS/MP

Course Mileage, Percent % Loading Condition Maximum Speed, Miles Per hour (mph)

Primary Road 15 90% at GVW, 10% at VCW

Secondary Road 25 90% at GVW, 10% at VCW

Improved Trails 50 90% at GVW, 10% at VCW

Trails 10 90% at GVW, 10% at VCW

3.5.1 Reliability (R). The reliability shall be at least 6,141 Mean Miles Between Hardware System Abort (MMBHSA). Maintenance and human induced failures are excluded (see 4.3.5.1).

3.5.2 Maintainability (M). The field-level Maintenance Ratio (MR) shall not exceed

0.0013 Maintenance Man-Hours per Operating Mile (MMH/OM) (unscheduled maintenance) and 0.001 MMH/OM (scheduled maintenance). Operator Level Daily (Before/During/After Operations) Preventive Maintenance Checks and Services are not included in the MR. No sustainment-level maintenance actions are allowed (see 4.3.5.2).

3.5.3 Environmental. The M870A4, and components, shall be able to withstand and operate under the following extreme conditions of weather, terrain and roads specified herein and in AR 70-38 (15 Sep 1979). The M870A4 shall be able to operate in hot and basic climatic regions (-25 degrees Fahrenheit (F) to 120 degrees F). The M870A4 shall be capable of uncovered long term storage in hot (160 degrees F), basic and cold (-50 degrees F) climatic areas to include stowage on pre-positioned afloat vessels up to 30 months without loss of mission essential functions with routine unit-level maintenance performed every six months (see 4.3.5.3).

3.5.3.1 Ozone. All rubber components used on the M870A4 shall be ozone resistant to the degree specified in accordance with (IAW) ASTM D1171 using ozone chamber exposure Method A (see 4.3.5.3).

3.5.3.2 Fungus. The M870A4 shall be able to operate in any environment that encourages growth of fungi for a minimum of 30 days, using test method 508.5 of MIL-STD-810 (see 4.3.5.3).

3.5.3.3 Fording. The M870A4 shall be able to ford in salt and fresh water up to 20 inches deep for 15 minutes without water contamination of hubs/wheel bearings (see 4.3.3.5.3).

3.5.4 Speed. On primary roads, the M870A4 shall be capable of hauling up to 35 tons at a sustained speed of 65 mph and up to a maximum load of 40 tons at sustained speeds of 55 mph (see 4.3.5.4).

3.6 Dissimilar Metals. Dissimilar metals shall not be used in intimate contact with each other. Dissimilar metals shall be protected against galvanic corrosion per MIL-STD-889 (see 4.3.6).

3.7 Materials. Material used in the manufacture of the M870A4 shall be new and of the highest industry quality as normally used for this type of equipment, considering strength, durability, ductility, and the purpose for which the equipment is to be used (see 4.3.7).

3.7.1 Hazardous Materials (HAZMAT) Usage. Asbestos, beryllium, beryllium alloys, cadmium, cadmium alloys, Class I and Class II Ozone Depleting Substances, hexavalent chromium, lead, leaded alloys, mercury, nickel, nickel alloys, radioactive materials and other Group 1 Agents classified as "carcinogenic to humans" by the International Agency for Research on Cancer (IARC) Monographs, shall not be present in or on any delivered materials, required for the operation and sustainment of the system, or used in final system manufacture and assembly processes. The following materials may be used without prior approval from the Government:

a. Cadmium on electrical connectors and back shells used to mate with cadmium electrical connectors on Government Furnished Equipment (GFE).

b. Chemical Agent Resistant Coating (CARC) primers and topcoats.

c. Lead-acid batteries.

d. Lead solder.

e. Steel containing up to 0.35 % lead by weight.

f. Aluminum containing up to 0.4 % lead by weight.

g. Copper and Brass alloys containing up to 4 % lead by weight.

h. Beryllium and Beryllium alloys used in electrical components.

i. Nickel and Nickel alloys used in electrical components.

j. Mercury containing components compliant with European Union (EU) Directive 2002/95/EC (RoHS).

3.8 Frame. The frame shall not have any performance failures on components IAW

49CFR393.201. The main frame members shall be adequately braced with a sufficient number of cross members to prevent permanent deformation. The outside frame members shall run the full length of the load space. The rear cross member shall extend the full width of the M870A4. The frame shall show no permanent deformation after torsional loads during normal operations in accordance with the OMS/MP in Table II (see 4.3.8).

3.8.1 Frame Flanges. Main frame members shall have one piece upper and lower flanges, running the length of the M870A4 (see 4.3.8).

3.8.2 Frame Splices. The frame members shall not be spliced (see 4.3.8).

3.9 Suspension System. The suspension system shall be IAW 49CFR393.207. Under all load conditions, loads shall not exceed maximum component load ratings and shall be equalized over all of the axles. Clearances shall prevent interference between the tires and any other parts of the M870A4 under the operating conditions specified herein, except that tire scuffing on frame members, which does not leave visual marks in the tire side wall base material, is allowed during ramp negotiations for roll-on/roll-off ship requirements. The loading on any axle shall not exceed its rated capacity. Suspension articulation shall be adequate so as to meet the RO/RO requirements in paragraph 3.25.1. Suspension articulation shall be adequate to keep all wheels in contact with the ground when any combination of wheels is elevated 8 inches above the ground.

Bushings shall be of extended long-life material. Jounce bumpers shall keep the axles from hitting the frame (see 4.3.9).

3.9.1 Axles. Clearances shall preclude interference between tires and any portion of the M870A4 when operating under all load conditions specified herein. The suspension shall have at least three axles and be capable of safely loading and transporting all of the equipment listed in Annex A (see 4.3.9.1).

3.9.2 Lubrication. All moving parts normally requiring lubrication shall be provided with accessible pressure grease fittings. Pressure type lubrication fittings shall be readily accessible for servicing and shall conform to SAE J534. Pressure relief fittings shall be used where high pressure lubricating equipment could cause damage to seals (see 4.3.9.2).

3.10 Axle and Wheel Ends.

a. Axles shall have preset wheel ends and shall utilize pre-adjusted bearings. The axle ends shall be of field serviceable design and utilize extended life wheel seals (see 4.3.10).

b. Wheel end lubricant shall conform to SAE J2360 Grade 75W/90 (see 4.3.10).

c. Wheel ends, and hubs shall be filled with SAE J2360 Grade 75W/90 gear oil (see 4.3.10).

d. Non-window type hub caps shall be furnished (see 4.3.10).

e. Provide single wheel/axle end pro torque type mounting nut, for each axle end (see 4.3.10).

f. A hub mileage meter shall be provided on road-side, front axle and be calibrated in miles

(see 4.3.10).

3.11 Wheels and Tires. Tires and wheels shall conform to Federal Motor Vehicles Safety Standards (FMVSS) 571.119 and 571.120. All tire and wheel ratings and dimensions shall conform to the Tire and Rim Association (T&RA) or the European Tire and Rim Technical Organization (ETRTO) Standards Manual at the maximum speed of the M870A4. Tires and wheels rated capacity shall be at least 15% greater than the maximum load imposed on each tire, measured at each wheel, at the ground, with the trailer loaded with a 40-ton payload. Wheel and tire assemblies currently in the Army system shall be assessed for form, fit, function, and ruled suitable or rejected for use. (Reference TACOM Administrator's Manual (AM) for use with SAE J2014, (R) Pneumatic Tire/Wheel/Runflat Assembly Qualifications for Military Tactical Wheeled Vehicles Appendix A.) Wheel and tire assemblies shall be balanced (see 4.3.11).

3.11.1 Tires. Tires shall be of steel belted radial tubeless type design with all terrain tread. Tire size, manufacturer, design and ply rating shall be the same for all tires on each M870A4. Tires shall have a minimum tread life of 10,000 miles for the mission profile of the M870A4 IAW SAEJ2014 Tire Tread Life Durability. Tires furnished shall be new with tire age not more than 18 months from date of manufacture, and have a storage life of 5 years IAW paragraph 4.3.10 of the TACOM Administrator's Manual (AM) for use with SAE J2014. Tires shall also meet requirements for Tread wear Indicators paragraph 4.3.3, Materials paragraph 4.3.5, Ozone Resistance paragraph 4.3.8, Tire Markings paragraph 4.3.11, and Anomalies paragraph 4.3.12 of the TACOM Administrator's Manual (AM) for use with SAE J2014. Tire air pressure shall be stenciled on both sides of the M870A4 (see 4.3.11.1).

3.11.2 Wheel Requirements. Tubeless, Hub Piloted, single piece disc type wheels shall be furnished. Wheel load and pressure rating shall be equal or greater than the tire capacity.

Wheel size shall be the same for all wheels on each M870A4. Wheel shall meet requirements for Radial & Cornering Fatigue Test per SAE J267 at its maximum load rating. The inner and outer wheels shall be mounted with wide flanged wheel lug nuts, one per stud. Torque wheel lug nuts with use of a torque wrench in proper commercial sequence. Wheel mounting nuts shall be corrosion resistant per paragraph 3.20.2 Corrosion Control and Performance using applicable corrosion protective coating for fasteners. The wheels shall be painted IAW paragraph 3.20.1.1 (see 4.3.11.2).

3.11.3 Spare Wheel and Tire Assembly. An inflated spare tire mounted on the spare wheel shall be furnished. The tire and wheel shall be identical to the tires and wheels furnished on the trailer (see 4.3.11.3).

3.11.4 Spare Tire Carrier. The spare wheel and tire assembly shall be removable and stowable by two operators. A tire carrier shall be provided which shall provide secure stowage for the spare wheel and tire assembly, and shall be located in such a way as to not obstruct the loading of vehicular equipment or bulk cargo onto the M870A4 and shall not interfere with usage of the prime mover’s winch. The spare wheel/tire assembly carrier shall incorporate some type of mechanism used to raise and lower the spare wheel/tire assembly from its stowed location on the trailer to the ground and from the ground to its stowed location on the M870A4 (see 4.3.11.4).

3.11.5 Tire Valves. Tire valves shall be IAW CID A-A-52611, shall be readily accessible for manual inflation, and shall be provided with sealing valve cap. If configured in a dual application, the tire/wheel assembly shall be equipped with valve extensions. The valve extensions shall not extend beyond the outside edge of the rim and be so mounted as to permit checking tire pressure and inflation.

3.12 Brakes. A multi-channel Antilock Braking System (ABS) shall be installed on the M870A4 and shall meet the requirements for brake performance specified within FMVSS

571.121 regulation for maximum payload. The brake system shall conform to Federal Motor Carrier Safety Regulations 393.40 through 393.42(b), 393.43, 393.45 through 393.53 and 393.55.

The brake system shall provide acceptable brake timing between tractor and trailer. Drum brakes or disc brakes are acceptable to meet the requirement. The M870A4 ABS shall have full functionality in 24-volt blackout operation (see 4.3.12).

a. Brakes shall be air brakes of S-cam drum type or disc (see 4.3.12).

b. ABS required on all axles. ABS diagnostic box shall be located above fording level with easy access for maintenance (see 4.3.12).

c. Spring failsafe brakes are required on all axle ends (see 4.3.12).

d. Brake shoes shall be provided of extended life type (see 4.3.12).

e. A brake caging capability is required with caging bolt provision that secures the caging bolt to the airbrake chamber until its use is required. Under normal operations standard rubber cap plugs installed in the failsafe brake chamber in place of the caging bolts are required (see 4.3.12).

f. All failsafe brake chamber assemblies to either vent to axle tube or assembly to be sealed (see 4.3.12).

g. S-Cam assembly to have bushings which are open ended to the atmosphere on one side and completely sealed on the opposite side (see 4.3.12).

3.12.1 Service Brakes. The service brakes shall be air operated and shall conform to

49CFR393 as applicable. The braking system shall be installed so as to have protection against damage caused by objects striking components, and meet the requirements of FMVSS121 (see 4.3.12.1).

3.12.1.1 Service Brake Performance. The M870A4 service brakes with the use of the truck tractor-trailer combination, with rated payload, shall meet the stopping distance requirements of 49CFR393.52 (see 4.3.12.1).

3.12.2 Glad Hands. The glad hands shall be of the self-sealing type and conform to SAE J318. Glad hand location shall comply with SAE J702. Glad hand covers shall be provided to protect the glad hand seals and to keep debris out of the glad hand when disconnected. Glad hand covers shall be tethered near the glad hand. Glad hands shall be located in such a way so that they do not interfere with the coupling/uncoupling and loading/unloading of the M870A4 (see 4.3.12.2).

3.12.3 Parking brakes. The parking brakes shall be IAW 49CFR393.41 and 49CFR571.121. The spring parking brakes shall be on each axle and shall automatically apply upon disconnection of the emergency air lines and under emergency conditions. The parking brakes shall hold the M870A4 at GVW while coupled to its prime mover without the use of the prime mover’s brakes on a 20% longitudinal grade facing both uphill and downhill (see 4.3.12.3).

3.12.4 Anti-Lock Brake System (ABS). The ABS shall operate on both 12v and 24v.

Use of a voltage converter box to meet the 24v operation requirement is acceptable. ABS, with each axle end sensed and controlled independently, is required on all axles and shall meet current industry and 49CFR571.121 requirements and provide Power Line Carrier (PLC) communication of ABS malfunction to the prime mover cab. The PLC architecture shall be compliant with SAE J2497. A diagnostic warning blink light shall be mounted on an angle at the left side front of the M870A4 and shall be in view of truck operator. The diagnostic warning blink light shall provide diagnostics capability at minimum to include fault isolation capability sufficient to identify critical failures without use of an off board device. The ABS / electronic control unit box shall be water proof to road splash/spray and shall be located above fording level with easy access for maintenance (see 4.3.12.4).

3.13 Upper Coupler. The upper coupler plate shall completely cover, and be compatible with both a full oscillating and fore and aft rocking fifth wheel. The upper coupler plate shall provide a minimum 30 years of useful life. There shall be no blind cavities which can collect water. Drainage holes shall be a minimum of 1” diameter. There shall be no drainage holes directly above the fifth wheel plate or within the range of motion of the fifth wheel. The upper coupler plate shall conform to 49CFR393.70 (b). The bottom surface of upper coupler plate shall be coated with 15W or 30W oil or Grease, Automotive and Artillery (GAA) grease (MIL-PRF- 10924). The forward end of the upper coupler plate shall have a turned up lip for ease of coupling. The lip shall provide for a smooth interface to avoid damage to prime movers equipped with 5th wheel top plate urethane inserts. The lip may have cutouts for electrical and brake air provisions (see 4.3.13).

3.13.1 Kingpin. The kingpin shall conform to SAE J700 and J848. The kingpin and its securing method shall be adequate to withstand the load imposed by Trailer on Flat Cars (TOFC) IAW Association of American Railroads (AAR) M-931. The kingpin shall be replaceable and interchangeable for both 2” and 3.5” SAE kingpins (see 4.3.13.1).

3.14 Landing Legs. The landing legs shall be capable of supporting a load at GVW and be adjustable in order able to maintain a coupling height compatible with all prime movers. The landing legs shall be located in such a way that they will not cause any interference with the operation of the prime movers. The M870A4 shall be provided with low ground pressure landing pads for use on soft soils or high temperatures on asphalt. The low ground pressure landing pads shall be stowed in the toolbox, or inconspicuously and securely stowed elsewhere on the M870A4 (see 4.3.14).

3.15 Lighting. Trailer lighting, including reflectors and conspicuity markings, shall be IAW 49CFR571.108 and MIL-STD-1179. The lights shall include DOT requirements for ABS connectivity. The M870A4 shall be equipped with a lighting system compatible with both commercial and military truck-tractors. All running lights and reflectors with the exception of the rear side marker lights shall be mounted in recessed or otherwise guarded locations, for protection. The brake lights shall override the four-way emergency flashers or the two systems shall be independent of each other. Turn signal lamps shall conform to SAE J588. The rear identification lights shall be located in a protected location (see 4.3.15).

3.15.1 Service Lighting Requirements. All vehicle service lights except blackout running lights shall be of the Light Emitting Diode (LED) type that fully meet MIL-STD-1179 and 49CFR571.108 requirements and shall operate on both 12-volt and 24-volt direct current (DC). License plate light and related harness is not to be furnished. Midship turn signals are not to be furnished. Conspicuity markings using reflective sheeting tape with extended life shall be furnished. Commercial reflectors (painted before assembly) shall be used (see 4.3.15.1).

3.15.2 Blackout Lighting System. A 24v LED vehicle blackout lighting system for tail light and stop light shall be provided. The energy emission of any M870A4 light source to be illuminated in blackout mode shall be limited to the visible spectrum of 380 to 700 nanometers (nm), with the following exception: energy may be radiated in the 700 to 1200 nm band range provided it is less that 1% of the energy radiated in the 380 to 700 nm band. The 24 volt lamp assembly is to include one, yellow, solid state lamp in the center and a pair of red, solid state lamps on each side of the center lamp. The four red lamps shall appear as individual lights up to 60 feet, from 60 to 120 feet the four red lights shall converge into two points of light. Lights will be visible at 1000, plus or minus 200 feet. When M870A4 is on a 20 percent downgrade no light shall be visible from an altitude which exceeds 400 feet. During blackout lighting operation the service lighting and the ABS diagnostic light shall be non-functional (see 4.3.15.2).

3.15.3 LED. The LED’s shall be IAW SAE J1889 and shall operate on both 12-volt and 24-volt DC (see 4.3.15.3).

3.15.4 Electrical Wiring and Harness Requirements. All electrical wiring shall conform to SAE J1292. All electrical harness connections are to be water tight, environmentally sealed, positive retention type to protect it from rain, and road spray. Wiring shall be secured to prevent chaffing and loose connections. The electrical end connections shall be greased to current industry standards. Grounding screws shall be corrosion resistant in accordance with paragraph

3.20.2 and industry standards for grounding electrical systems (see 4.3.15.3.1).

3.15.4.1 Electrical Receptacle. The M870A4 shall be equipped with one 12-contact receptacle with cover for 24-volt, and one 7-contact receptacle with cover for 12-volt installed at the front of the M870A4. The 12-contact receptacle shall conform to STANAG 4007 except where it must be modified to be compatible with both the M983 LET and M916 LET series prime movers (reference Annex B for prime mover pin assignments). The 7-contact receptacle shall conform to SAE J560 round socket with cover. Both receptacles shall be located IAW SAE J702. There shall be no possibility for the 7-contact receptacle to be energized at 24 volts when the 24-volt receptacle is connected (see 4.3.15.4).

3.16 Rear End Protection. The rear end protection shall comply with the requirements of 49CFR393.86, 49CFR571.223 and 49CFR571.224 (see 4.3.16).

3.17 Mud Flaps. Anti-Sail mud flaps shall be provided behind the rear wheels IAW SAE J682 and installed IAW industry standards (see 4.3.17).

3.18 Deck.

3.18.1 Flooring. The M870A4 deck shall be covered with dried, non-pressure treated, dense Apitong/Keruing hardwood boards of non-ship-lap type. All boards shall be full length with the exception of the two center boards used as the deck width extensions. The deck width extension boards shall consist of not more than three segments each. Finger jointed boards to achieve full trailer length are acceptable. Finger joints are to be vertical and bonded together using adhesive MMM-A-181. Finger joints are to be a minimum of 60 inches apart and shall withstand a minimum bending strength of 13,300 psi (see 4.3.18.1).

3.18.1.1 Test Performance. The thickness of the wood flooring and spacing between the crossmembers shall be sufficient to safely handle all loading and operating conditions as identified within this ATPD. Deck boards shall not break and cross members shall not deform during the operation of the M870A4 (see 4.3.18.1.1).

3.18.1.2 Attachment of Flooring. Flooring shall be secured with corrosion-resistant fasteners meeting paragraph 3.20.2 Corrosion Control and Performance. The center boards shall be secured to permit their easy removal by two soldiers without special tools. These removable boards shall be capable of being used in the extension brackets specified. All other boards shall be secured at two locations at each cross sill/member. If screws are used, the top of each screw shall be countersunk below the top of the wood surface so as not to be a hazard. The ends of each full length floor board shall be supported by frame structure(see 4.3.18.1.2).

3.18.2 Deck Width Extension. Side extension brackets for planking shall be furnished to provide at least 120” overall width of the M870A4. The number of brackets per side and design shall be the manufacturer’s standard, except in no case shall the bracket center to center spacing be more than 2 feet. Provisions shall be made for storage of the brackets when not being used.

Brackets shall be located, vertically, that when the removable planks specified in 3.18 are in place, the top of the plank shall be level with the remaining planks in the deck. Widening provisions shall be provided in the concentrated payload area. Provisions for securing extension brackets to prevent inadvertent deployment while operating on rough terrain shall be furnished.

Provisions for securing the removable boards to the extension brackets shall be furnished (see 4.3.18.2).

3.18.3 Low-bed Level Deck. The deck shall be of sufficient length to safely transport all of the equipment in Annex A (see 4.3.2). The M870A4 shall have a level deck extending from the gooseneck to the beavertail or the end of the trailer. There shall be no wheel housings or kick up over the wheels. The M870A4 tires shall not extend above the deck when the M870A4 is being loaded from the rear with equipment identified in Annex A. Wheel well covers are required. (see 4.3.18.3).

3.19 Mechanical Folding Gooseneck. The gooseneck shall be of the mechanical folding type, be full width of the M870A4, and include a tapered approach ramp for safe loading of the equipment listed in Annex A. Folding goosenecks shall fold flat to the ground, and raise to coupling height mechanically by use of the prime mover winch. The gooseneck shall taper in such a way that all equipment in Annex A can be loaded without the use of shoring or additional ramps. The folding gooseneck shall have a failsafe mechanical lock for transport and be non-binding during lowering and raising. The locks shall be safe and not deform in transportation, including front trailer supports. If a pneumatic lock system is used, a manual backup is required.

The M870A4 gooseneck shall be capable of carrying equipment accessories such as loader buckets and dozer blades. The folding gooseneck shall be operable by one soldier with assist from the prime mover winch (see 4.3.19).

3.19.1 Coupling with and Uncoupling from Prime Movers. Coupling and uncoupling shall be assisted by a winch with a cable on the prime movers when present. When a commercial tractor without a winch is utilized, the M870A4 shall be coupled with the landing legs engaged.

The M870A4 shall be able to be coupled and uncoupled, on uneven surfaces which include primary roads, secondary roads, improved trails and trails, in all soil conditions and all climatic conditions. The design of gooseneck shall be compatible with the prime movers specified in paragraph 3.1.1 (see 4.3.19).

3.20 Paint/Corrosion Control and Performance.

3.20.1 Paint. The M870A4 including the undercarriage, suspension and axles shall be cleaned, pretreated, primed and topcoated IAW MIL-DTL-53072. CARC topcoating shall be IAW MIL-DTL-64159. The topcoat color shall be Tan 686A per color chip 33446 or Green 383 per color chip 34094 IAW FED-STD-595. The topcoat color will be specified in the contract or delivery order. (see 4.3.20.1).

a. All hardware and components not normally painted shall be treated to provide low reflectance surface (see 4.3.20.1).

b. Items not normally painted shall have corrosion resistance finish consistent with the requirements identified in 3.20.2 (see 4.3.20.1).

3.20.1.1 Wheel Paint System. The M870A4 wheels shall be cleaned, pretreated, primed and topcoated IAW MIL-DTL-53072. The wheels shall be primed IAW MIL-DTL-53084 primer. The wheel topcoat shall be IAW MIL-DTL-64159. The topcoat wheel color shall be Lusterless Black per chip number 37030 IAW FED-STD-595. Do not apply CARC topcoat paint to wheel studs, bead seat of rim or portions enclosed by tire. The total paint coating thickness shall not exceed 0.0035 inches (3.5 mils) in the wheel mating surface to hub (both sides) and nut seat area. Coating thickness shall be measured at a minimum of five locations on each of the wheel mating surface to hub locations (both sides) between bolt holes.

3.20.2 Corrosion Control and Performance. The M870A4 shall operate for extended periods of time in corrosive environments involving one or more of the following: high humidity per AR 70-38, salt spray, road de-icing agents, ground contact, gravel impingement, fording, atmospheric contamination and temperature extremes (-50 to +160 F degrees). During the

M870A4’s service life there is to be no failure(s) caused by corrosion requiring repair or replacement of parts other than scheduled maintenance items. Only normal washing per the technical manual, scheduled maintenance (exclusive of paint touch up) and repair of accidentally damaged areas (not a result of intended use, deficiency in design, materials, manufacturing or normal wear), is to be necessary to keep the corrosion or degradation prevention in effect. Such capability shall be achieved by a combination of production techniques, materials selection and design features. Paragraph 6.4 references documents that may be used for guidance to achieve the required levels of performance. Joints shall be designed to prevent the penetration and entrapment of corrosion-causing moisture. All aluminum and steel parts shall be pretreated and primed. Steel and aluminum parts mated together shall have an added galvanic coating applied between the mating services to prevent galvanic reaction (see 4.3.20.2).

a. During the service life, surface corrosion shall:

1. Meet or exceed corrosion grade 8 in accordance with ASTM D 610 on any steel surface (approximately stage one (1) in the US Army Corrosion Rating System, TB 43-0213, on any non-ferrous surface) (see 4.3.20.2).

2. Exhibit no loss of original base metal thickness greater than 2% or 25.4 microns (.001 inch), whichever is less (see 4.3.20.2).

b. There shall be no adverse effect on form, fit or function of any component due to corrosion or degradation, throughout the in-service life (see 4.3.20.2).

c. Directed Military Specification parts shall be exempt from these requirements. All other exceptions to these requirements shall be listed with a brief rationale and submitted to the Government for approval prior to any evaluation, contract award or start of work (see 4.3.20.2).

d. Trailers with less than 1,000 miles of operation shall exhibit no corrosion of any kind (see 4.3.20.2).

e. At 12,000 miles Trailers shall not exceed corrosion stage 1 in accordance with TB 43- 0213 (see 4.3.20.2).

3.20.3 Wood Preservation. Apply a coat of commercial wood sealant or linseed oil to wood surfaces, top and bottom (see 4.3.20.3).

3.21 Marking. The M870A4 exterior markings shall be placed and sized in accordance with MIL-STD-642. Markings, letters and numbers on the M870A4 shall be lusterless paint conforming to MIL-DTL-64159. Markings, letters and numbers shall be black chip 37030 of FED-STD-595 used over a green or tan background or green chip 34094 of FED-STD-595 used over black background. Markings for tire pressure, M870A4 tiedown provisions, center of gravity (empty) and M870A4 lift provisions shall be applied to the M870A4 in block letters or numbers 2 inch in height. The longitudinal center of gravity of the unloaded M870A4 shall be conspicuously marked on both sides of the M870A4. The individual cargo tiedown provisions on the deck are not to be stenciled (see 4.3.21).

3.22 Data Plates. Data plates shall be in accordance with Class 2, Composition C of A- A-50271. The background color of data plates shall be black. The plates shall be legible and readily viewable to service personnel. Plates shall be attached to the web exterior of the main frame rail on the curb side on the front 1/3 of the trailer length (see 4.3.22).

3.22.1 Trailer Data Plate. The information required for the trailer data plate shall be inscribed or stamped in such a manner that the legend will be discernible if inadvertently painted over. The trailer data plate shall include at least the information shown below (see 4.3.22):

Nomenclature:

Make and model: M870A4 Manufacturer’s serial number:

Registration number:

NSN Number:

Vehicle curb weight: kg (pounds) Payload, maximum: kg (pounds) Gross vehicle weight rating, max: kg (pounds) Gross combination weight rating, max: kg (pounds) Date of delivery: (month and year) (date of delivery shall be left blank until the M870A4 is accepted by government inspector.)

Warranty: mo. km (miles) Contract number:

US Property

3.22.2 Trailer Shipping Data Plate. A Trailer Shipping Data plate shall be provided IAW

MIL-STD-209 (see 4.3.22).

3.22.3 Lubrication Data Plate. A lubrication data plate chart shall be provided. The lubrication data plate shall direct attention to all lubrication fittings and points. The data plate shall identify type and grade of lubricants for each application and include required changes for critical temperatures ranges (see 4.3.22.3).

3.23 Registration Numbers. The registration number shall be welded on main (road side) longitudinal beam web at 2” high and weldment 1/16” minimum height (see 4.3.23).

3.24 Reserved.

3.25 Transportability. The M870A4 shall be transportable without special permits worldwide by highway, rail, Army landing craft (LCU-2000, LSV, and JHSV) and larger vessels/ships to include roll-on/roll-off vessels, lift-on/lift-off vessels, and fixed-wing air (C-5 & C-17 aircraft) modes IAW MIL-STD-1366 and TEA Pamphlet 70-1. Preparation, by two crew members, for transport by any mode shall not exceed 30 minutes using BII. All parts required to be removed shall have a place for storage on the M870A4 (see 4.3.25).

3.25.1 Marine Transportation - Roll-On/Roll-Off (RO/RO). To maintain safe operations and prevent interference problems the trailer and truck-trailer combination shall have adequate clearance underneath them to prevent contact at the ramp crest/toe for a 15 degree ramp and enough clearance above them to prevent projection interference problems. Angles shall be defined in accordance with SAE J1100. The M870A4 at VCW shall be capable of negotiating the worst case ramp angle of 15 degrees by the roll-on/roll-off method, without ramp approach shoring and without any portion, except the tires, of the M870A4 contacting the surface of the ground, ramp, or aircraft cargo compartment floor (see 4.3.25.1).

3.25.2 Rail Transportation. The M870A4 shall meet the unrestricted rail transport for North America when loaded on a…