Description
FP065172 - AUTO SLACK ADJUSTER - 10 SPLINE, 1 1/2" - 6"
PART NUMBER(S):
Fleet Products: FP065172 | OE: 65172, A24-3275-J-1154, 065344, K041876 | Automann: 137.1012
DESCRIPTION:
Model: Automatic Slack Adjuster (Red Piston)
Vehicles: Designed for drive and trailer axle drum brake systems on heavy-duty commercial vehicles including Freightliner, Volvo, Mack, and International
• Spline Count: 10
• Camshaft Diameter: 1 1/2"
• Arm Length: 6" (center-to-center)
• Mount Type: Straight arm
• Mounting Hole Center Distance: 6"
• Mounting Offset: 0°
• Brake Type: Drum brakes
• Piston Color: Red (identifies variant replacing A24-3275-J-1154)
• System Integrity/Technology: Automatic self-adjusting with stroke-sensing clutch mechanism
• Material: Forged steel housing with bronze bushings
• Clevis Pin Size: 1/2"
• Clevis Thread Size: 5/8"-18 (standard, straight-thread type)
• Brake Chamber Size Compatibility: Type 24 (confirmed)
• Torque Rating: >45 in-lbs
• Lubrication: Greaseable via zerk fitting
• Body Angle: 0° (unhanded design)
• Special Features: OEM-grade sealed design, direct-fit with centralized clutch for consistent adjustment
• Unique Identifiers: Replaces A24-3275-J-1154; often marked by red piston cap for field identification
Applications:
This slack adjuster is used across North American fleet drive and trailer axles configured for drum brakes requiring a 10 spline, 1.5" cam interface and 6" arm. Specifically suited to configurations using Type 24 brake chambers and is compatible with major fleet platforms including Freightliner Cascadia, Volvo VNL, International LT/ProStar, and Mack Granite/Pinnacle where OEM specifications align.
CROSS-REFERENCE(S):
065172, 065344, 05-760, 05-763, 1090272, 12385342, 134.3742, 137.103, 137.1030, 137.1012, 1676747C1, 1693122C, 23551SS, 286961N, 40020240, 5000900, 5396CS52315, 5462, 65172, 65172P, 6814201339, 701188, 745-065172, 745-065174, 745065172, 8235-R802071, A14-3275-A-1145, A15-3275-A-1145S, A24-3275-J-1154, A3275X611154, A52-3275A599S, AS1038, ATIR802071, ATP23551, ATX23551, BEN-065172, BER065172, BER-065172, BW K041876, BW065172, BWK041871, BX065172, BX065344, BXW065172, E-11408, E-15017, E-15024, E-2459, FP65172, GTP065172, GTS23551, K041768, K041768BXW, K041871, K041876, K065174, M-4044, MK411065S, MK42100S, MM1201S, MPGS-23551, NS65172, OTR65172, P4935, PS065172, R801044, R801071, RF065172, ROCR802071, R802071, R802071-RI, S-23551, S23551, SA2172, SFK065172, STM MK42100S, TDAR802071, TDAR801079, TF065172, TRW065172, TSM065172, TDA R802071, TWDR802071, V1090272, VIP065172, VTC-35503, VTC-35512, ZAC065174
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 install per OEM torque specifications and adjustment guidelines
✔ Confirm spline count, arm length, and camshaft diameter before installation
✔ Use only compatible clevises and 1/2" pins; improper pin size may lead to brake misalignment
✔ Ensure grease zerk remains accessible for periodic lubrication unless sealed-for-life variant is used
✔ Slack adjuster must be checked during brake service intervals for proper travel and clutch engagement
✔ Lubricate as required or specified by manufacturer to prevent seizure or premature wear
✔ Red piston variant indicates this model supersedes A24-3275-J-1154; verify against legacy part markings
✔ Designed for unhanded installation; no left/right variants required
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