2-FXL20.pdf
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- Attached to
- Competitive Selection OH|DOT023A26-4
- Contract number
- DOT023A26-4
- Issued by
- Ohio
About this file
This document is a technical specification sheet for a Mack Trucks FXL20 Front Axle, published in 2007 by Mack Trucks, Inc. located in Allentown, Pennsylvania. The document provides detailed engineering specifications for a 20,000 lbs (9,072 kg) front axle configuration, focusing on technical design, component materials, and performance characteristics.
The specification sheet details the front axle's key features, including a forged I-Beam construction, unitized wheel hubs that require no maintenance, and sealed tapered kingpins and bearings. The axle includes specific technical details such as a chromium molybdenum alloy steel steering knuckle, a modified carbon steel steering knuckle pin, and tapered roller bearings. The document also provides suspension and brake specifications, including spring capacity options for different chassis models, brake actuation type (air), and lining details. The technical sheet is designed to provide comprehensive engineering information for potential truck configuration and manufacturing purposes.
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Text version
• Unitized wheel hubs—requires no maintenance—permanently sealed with grease.
• Sealed tapered kingpins and bearings keep out road splash, extend axle life and lower maintenance.
• Forged I-Beam construction, strong and lightweight.
DETAIL SPECIFICATIONS
MAKE: MACK
Type . . . . . . . . . . . . . Reverse Elliot, Drop-Forged
& Heat Treated I-Beam Size (Beam Center Height) . . . . . 4.75" [121 mm] Flange Width . . . . . 3.50" [89 mm] Top & Bottom Web Thickness . . . . . . . . . . . . . . . 0.75" [19 mm] Section Modulus . . . . . . . . . . . 9.90" in3 [172 cm3]
STEERING KNUCKLE:
Material . . . . . . . . . . . . . Chromium Molybdenum
Alloy Steel, Heat Treated Spindle Diameter
Inner Bearing . . . . . . . . . . . . . . 2.68" [68 mm] Outer Bearing . . . . . . . . . . . . . . 2.68" [68 mm]
Steering Knuckle Pin:
Material . . . . . . . . . Modified Carbon Steel, Heat
Treated & Induction Hardened Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Tapered Diameter
Top . . . . . . . . . . . . . . . . . . . . . . 1.57" [40 mm] Bottom . . . . . . . . . . . . . . . . . . . 2.36" [60 mm]
Mack Trucks, Inc., Allentown, Pennsylvania
FXL20
20,000 LBS. [9 072 kg]
STEERING KNUCKLE: (Continued)
Inclination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6° Knuckle Pin Support
Upper . . . . . . . . . . . . . .Tapered Roller Bearing Lower . . . . . . . . . . . . . . . . . . Grooved bushing
Thrust Bearing Type . . . . . . . . . . . . . . Tapered Roller Bearing
Location . . . . . . . . . . . . . . . . . Top of Knuckle Pin Hub . . . . . . . . . . . . . . . . . . . . . . . . . . Ductile Iron Bearings . . . . . . . . . . . . Tapered Roller (Unitized) Lubrication . . . . . . . . . . . . . . . Permanently lubed with Synthetic Grease
Pivot Centers:
FXL20 . . . . . . . . . . . . . . . . .69.92" [1 776 mm]
Spring Centers . . . . . 33.5" [851 mm] MRU, LEU 32.5" [826 mm] GU
NOTE: FXL used with wide base type tires will exceed 96" [2 438 mm] overall width.
SPRING CAPACITY
(GRD. LOAD RATING) SPRING SIZE
SPRING SIZE CHASSIS MODEL
APPLICATIONLENGTH WIDTH
20,000 LB.
[9 072 KG]
STD.
Taperleaf - Shackle 52.52" [1 334 mm] 4" [102 mm] GU
Taperleaf - Slipper 50.25" [1 276 mm] 3.5" [89 mm] MRU/LEU
Multileaf - Shackle 52.52" [1 334 mm] 4" [102 mm] GU (OPT.)
Multileaf - Slipper 50.25" [1 276 mm] 3.5" [89 mm] MRU
18,000 lb.
[8 165 kg]
Multileaf - Shackle 52.52" [1 334 mm] 4" [102 mm] GU
Multileaf - Slipper 50.25" [1 276 mm] 3.5" [89 mm] MRU
20,000 lb.
[9 072 kg]
HD
Multileaf - Shackle 52.52" [1 334 mm] 4" [102 mm] GU
Multileaf - Slipper 50.25" [1 276 mm] 3.5" [89 mm] MRU/LEU
FRONT AXLE
©2007 Mack Trucks, Inc. Printed in U.S.A.FRO030 240 1501 2/26/2007
A SALES ENGINEERING PUBLICATION
The information in this brochure was accurate as known as of the date of the publication. Illustrations may not be representative of current product. Mack Trucks, Inc. reserves the right to make changes in specifications, equipment or design, or to discontinue models or options without notice at any time.
FXL20
20,000 LBS. [9 072 kg]
SUSPENSION
MULTILEAF EYE & SLIPPER
TAPERLEAF EYE & SLIPPERTAPERLEAF SHACKLE
MULTILEAF SHACKLE
TYPE CAM
SIZE DIAMETER
WIDTH
16.5" [419 mm]
6" [152 mm]
MAKE Arvin Meritor
ACTUATION Air
LINING THICKNESS 0.85" [22 mm] Tapered
LINING AREA, TOTAL 378 in 2 [2 439 cm2]
CHAMBER SIZE—
Sq. In. Per Wheel
1 @ 24 [155 cm2]
SLACK ADJUSTER LENGTH 5.5" [140 mm]
BRAKE ADJUSTMENT Self-Adjusting
DUST SHIELDS Optional
BRAKES
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