2-FXL23.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 sales engineering publication from Mack Trucks, Inc., located in Allentown, Pennsylvania, detailing technical specifications for the FXL23 Front Axle, a heavy-duty truck axle designed for 23,000 lbs. [10,433 kg] load capacity. The publication provides comprehensive engineering details about the front axle's construction, materials, and performance characteristics.
The FXL23 front axle features a reverse Elliot, drop-forged, and heat-treated I-Beam construction with a 4.75" beam center height, forged from lightweight materials. Key technical specifications include a chromium molybdenum alloy steel steering knuckle, tapered kingpins, unitized wheel hubs that are permanently sealed with grease, and sealed tapered bearings. The axle offers two suspension configurations: a multileaf shackle for GU chassis models and a multileaf eye & slipper for MRU chassis models. Brake specifications include 16.5" Arvin Meritor cam-type brakes with air actuation, 0.85" tapered lining, and self-adjusting mechanisms. The document notes that when used with wide base type tires, the axle will exceed 96" overall width.
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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
FXL23
23,000 LBS. [10 433 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
Pivot Centers:
FXL23 . . . . . . . . . . . . . . . . .69.92" [1 776 mm]
Spring Centers . . . . . . . . . . 33.5" [851 mm] MRU 32.5" [876 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
23,000 LB.
[10 433 KG]
Multileaf - Shackle 52.52" [1 334 mm] 4" [102 mm] GU
Multileaf - Slipper 50.25" [1 276 mm] 3.5" [89 mm] MRU
FRONT AXLE
©2007 Mack Trucks, Inc. Printed in U.S.A.FRO033 240 1505 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.
FXL23
23,000 LBS. [10 433 kg]
SUSPENSION
MULTILEAF EYE & SLIPPERMULTILEAF SHACKLE
BRAKES
TYPE CAM
SIZE DIAMETER
WIDTH
MAKE
16.5" [419 mm] 6" [152 mm] 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 @ 30 [194 cm2]
SLACK ADJUSTER LENGTH 5.5" [140 mm]
BRAKE ADJUSTMENT Self-Adjusting
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