Description
FP400-10141 - AUTO SLACK ADJUSTER - 28 SPLINE, 1 1/2" - 5.5", 6.5"
PART NUMBER(S):
Fleet Products: FP400-10141 | OE: 400-10141, 40010011, A14-3275-Z-1144, 40920046, 40020240, ZZ40020240, 539640020240, M808005 | Automann: 133.2831
DESCRIPTION:
Model: Automatic Slack Adjuster
Vehicles: Freightliner, Mack, Volvo, and other heavy-duty trucks and trailers with compatible drum brake systems
• Spline Count: 28
• Camshaft Diameter: 1.5"
• Arm Length: 5.5", 6.5" (center-to-center, straight arm)
• Mounting Style: Straight, 0° offset
• Body Angle: 34°
• Clevis Pin Diameter: 5/8"
• Material: Heat-treated ductile nodular iron housing, forged steel arm
• Lubrication: Factory-lubricated & sealed; Zerk fitting included for optional greasing
• Performance: Automatic self-adjusting system; long-stroke compatible; heavy-duty gearset
• System Integrity: Unhanded design, drilled worm wheel, sealed for durability
• Compatibility: Type 24/30 brake chambers (inferred), all major clevis systems
• Style: Haldex/Midland configuration
• Technology: OE-grade replacement, compatible with ABS-equipped brake systems
Applications:
Designed for use on drive axle drum brake systems in North American heavy-duty truck and trailer applications. Used where 28 spline, 1.5" camshaft, and 5.5"/6.5" straight arm adjusters are required. Replaces OE and aftermarket slack adjusters including A14-3275-Z-1144.
CROSS-REFERENCE(S):
05-663, 10141P, 133.2831, 135.2831, 135.S2835, 25QD410P10, 3946254, 400-10141, 400-20231, 400-20240, 40010011, 40010011M1D, 40010141, 40010141M1D, 40020231M1D, 409-10215, 409-10229, 409-10390, 409-10406, 409-10408, 409-10429, 409-10530, 409-10532, 409-10551, 409-10553, 409-10628, 409-10650, 40910215, 410141P, 806004A, 8235R806026, 8235R806026A, ABP N42AS 40010141, AM1332831, AM135S2835, E-6927B, E6927B, EM50450, FLT40010141, HAL40010141, HDX 40010141, HDX 40020231, L3605, M-4060, M807004, MD40010141, MID40010011, MID40010141, MID40020231, MIR-400-10141, PL-10141, PROSA56141, R806004, R806004A, R806026, R806026A, RB-10141, S-23850, S23850, SA10101, TDAR806026A, WA10141R, WRA07100A, HDX40020231, 40920019, 40020231, ZZ40020231, 539640020231, MID40020231
A 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 follow OEM torque specifications and install procedures
✔ Confirm spline and cam diameter before fitment
✔ Use only compatible clevis hardware (5/8" pin size recommended)
✔ Ensure Zerk fitting is accessible for periodic lubrication (if required)
✔ Do not reuse worn clevis or bushings; replace with matching hardware
✔ Inspect for correct arm angle and brake stroke on initial setup
✔ Periodically inspect auto-adjust function for wear and system integrity
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