Description
FP400-10140 - AUTO SLACK ADJUSTER - 28 SPLINE, 1 1/2" - 5", 6"
PART NUMBER(S):
Fleet Products: FP400-10140 | OE: 400-10140, A14-3275-X-1142, 40010140 | Automann: 133.283, 135.2830, 135.1055, 135.S2830
DESCRIPTION:
Model: Automatic Slack Adjuster
Vehicles: Heavy-duty trucks and trailers with drum brake systems
• Adjuster Type: Automatic (self-adjusting)
• Camshaft Spline Diameter: 1.5"
• Spline Count: 28
• Arm Length: 5" and 6" (center-to-center)
• Style: Haldex/Midland strap-mount type
• Casting Angle: 34°
• Mounting Offset: 0" (straight arm, non-offset)
• Mounting Style: Bolt-on, strap bracket
• Brake Type: Drum brake
• Clevis Pin Diameter: 1/2"
• Clevis Thread Size: 5/8"-18 (straight thread)
• Brake Chamber Compatibility: Type 20
• Sensing Type: Stroke-sensing
• Maximum Torque: >45 in-lb
• Piston Color: Yellow (typical per OE reference)
• Lubrication: Zerk fitting equipped (greasable)
• Material: Forged steel construction
• Unique Identifiers: Replaces A14-3275-X-1142, fits applications matching spline and cam specs
• System Integrity: High-performance OEM replacement with no core charge
Applications:
Designed for heavy-duty commercial vehicle brake systems using drum brakes and requiring a 28-spline, 1.5" cam, with either 5" or 6" arm length. Used commonly on drive and trailer axles across multiple makes. Ensures consistent brake adjustment and compliance with OEM brake performance requirements.
CROSS-REFERENCE(S):
400-10140, 40010140, A14-3275-X-1142, 133.283, 133.2830, 135.1055, 135.2830, 135.S2830, 05-655, 10140P, 3518990, 3523702, 25QD410, 3946256, 400-20234, 40010140M1D, 40020234M1D, 409-10093, 409-10125, 409-10149, 409-10178, 409-10225, 409-10241, 409-10314, 409-10360, 409-10404, 409-10405, 409-10426, 409-10457, 409-10531, 409-10552, 409-10561, 409-10566, 409-10615, 409-10732, 409-10742, 8235M807024, ABPN42AS40010140, E6925B, EM50410, FLT40010140, HAL40010140, HDX40010140, HDX40020234, L3604, M-4059, M807024, MID40010140, MID40020234, MIR-400-10140, PL-10140, PROSA56140, R806023, R806024, R806024A, RB-10140, S-23849, S23849, SA10100, TDAM807024, WA10140R, WBA07155A, 286958N, A3275X56114228, ROCR802412, 8235-R802412, A1-3275-S-1085S, A3-3275-U-1191S, ATIR802412, 05-562, AS1039, E-6993AA cross-reference listing means this part may be a compatible replacement for these part numbers based on OEM or distributor data.
IMPORTANT INSTALLATION NOTES:
✔ Install only using correct clevis, pin size, and straight arm configuration
✔ Torque mounting hardware to OEM specifications
✔ Confirm zerk fitting accessibility for periodic greasing
✔ Check initial setup for proper stroke length and adjustment limits
✔ Periodically inspect slack adjuster for wear, lubrication, and function
✔ Replace if excessive free stroke, imbalance, or misalignment is observed
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Warranty Information
