Description
FP801074 - AUTO SLACK ADJUSTER - 28 SPLINE - 1 1/2" - 6" (DRIVE AXLE)
PART NUMBER(S):
Fleet Products: FP801074 | OE: 801074, A41-3275-Z-1144, R801074 | Automann: 139.283
DESCRIPTION:
Model: Automatic Slack Adjuster – Drive Axle
Vehicles: Heavy-duty trucks with drive axle drum brakes (e.g., Freightliner, Peterbilt)
• Spline Count: 28
• Camshaft Diameter: 1 1/2"
• Arm Length: 6" (center-to-center)
• Mount Type: Straight arm
• Mounting Hole Center Distance: 6"
• Clevis Type: Straight, typically 1/2" pin hole, 5/8-18 UNF threads
• Offset: 0°
• Brake Type: Drum
• Piston Color: Yellow
• Body Angle: 0°
• Material: Forged steel
• Lubrication: Zerk fitting or pre-lubricated (depending on variant)
• Chamber Size Compatibility: Type 24 brake chambers
• Torque Rating: >45 in-lbs
• Unique Identifiers: Crewson type design, includes AS3019 clevis with dual nuts (½")
• OEM Designation: Replaces A41-3275-Z-1144, used on drive axles
Applications:
Designed for drive axle drum brake systems in heavy-duty commercial vehicles. Engineered to maintain brake adjustment automatically, this unit supports improved braking consistency and performance in severe-duty operations. Frequently used in OEM and replacement positions across major commercial truck platforms.
CROSS-REFERENCE(S):
801074, R801074, A41-3275-Z-1144, A143275J1154S, 8235-R803112, R803112, R802491, R802490, R803111, R801071, R801075, E11402A, E11402, ROR803112, ROR-R801074, S-23559, S23559, SA1074, ABP N42AS, TDA R801074, TDA R803112, FLTR801074, A81074, R801074C8T, MPGS-23559, ATX23559, R801074-RC, GTPR801074, ATP23559, 23559SS, VIPR801074, R801074HTP, GTS23559, PSR801074, TF R801074, 139.283, 139.2830, 139.2836, 139.2837, AM1392830, AM1392836, E-11402, E-11421, E-11422, E-11423, E-11424, FC01074, M-4047, RFR801074, OTR801074, WA1141, S-21241, 400-10212, AS1141, FL1141, 014141, PA1141, 05-1141, 621141, TTP1141, TR1141, 1141, WA286959N, 286959N, A3275X61114428, E1141, E11417, E11417A, AS1140, 05-363, 05363, 2018227C91, 1090265, 3918360, 3947646, 400-10156, 400-20211, 40020211, 8086517, A-14767, AS1020, AS1040, BA670GRP, BHS-A670, E168, A23275A599S, A23275N768S, A23275U593S, A23275W595S, A233275H1152S, A243275H1152, A273275H1152S, A283275H1152S, A293275A599S, A293275U593S, A323275H1152, A323275N768, A353275A1145, A353275H1152S, A353275A1145S, A363275Z1144S, A373275N768, A393275A1145, A393275A1145S, A393275Z1144, A393275Z1144S, A413275A1145, A433275A1145S, A433275Z1144S, A443275A599S, A443275U593S, A443275Z1144, A443275Z1145, A463275Z1144S, A463275A1145S, A473275A1145, A473275Z1144, A563275A599S, A563275U593S, A573275A1145, A573275Z1144, R801072, R801073, R801079, R802440, R802441, R802444, R802445, R802446, R802447, R802462, R802463, R803044, R803045, R803046, R803047, R803048, R803049, R803050, R803051, R803052, R803053, R803108, R803110A cross-reference listing means this part may be a compatible replacement for these part numbers based on OEM or distributor data.
IMPORTANT INSTALLATION NOTES:
✔ Always install per OEM and manufacturer instructions to ensure correct brake function and safety
✔ Use only compatible clevis and pin sizes (typically 1/2" pin; clevis threads 5/8-18 UNF)
✔ Ensure straight-arm orientation and proper torque settings during installation
✔ Verify lubrication access if zerk fitting is present; some units may be permanently lubricated
✔ Confirm compatibility with Type 24 brake chambers
✔ Adjust and test slack adjuster for proper engagement and functionality post-installation
✔ Periodically inspect automatic slack adjusters for wear or malfunction
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Warranty Information
