Description
FP065174 - AUTO SLACK ADJUSTER - 28 SPLINE, 1 1/2" - 5 1/2"
PART NUMBER(S):
Fleet Products: FP065174 | OE: 065174, 064174, 065247, K043197 | Automann: 137.281, 137.2810
DESCRIPTION:
Model: Auto Slack Adjuster
Vehicles: Heavy-duty trucks and trailers, including Freightliner, Mack, and Navistar models
• Spline Count: 28
• Camshaft Diameter: 1 1/2"
• Arm Length: 5.5" (center-to-center)
• Mount Type: Straight (no offset)
• Mounting Hole Center Distance: 5.5"
• Clevis Pin Size: 1/2"
• Clevis Thread: 0.625" diameter, 18 TPI (straight)
• Brake Chamber Compatibility: Type 24
• Anchor Bracket Style: Strap
• Material: Forged high alloy steel gears, heat-treated housing
• System Integrity: Clearance-sensing, collar lock clevis, factory-lubricated sealed mechanism
• Performance/Technology: Automatic self-adjusting; centralized clutch
• Piston Color: Red
• Carrier Type: Unhanded design with drilled worm wheel
• Body Angle: 0°
• Torque Rating: >45 inch-pounds
• Lubrication: Zerk fitting (accessible); factory sealed
• OEM Quality: Replaces A35-3275-Z-1144 red piston model
• Unique Identifiers: Long-stroke compatible, heavy-duty ductile nodular iron construction
Applications:
Designed for drive and trailer axle positions on drum brake systems using a 28-spline, 1 1/2" camshaft and 5.5" straight arm configuration. Commonly installed in Freightliner trailers (ABPN42AS065174), Mack trucks (745-065174), and Navistar/International vehicles (ZAC065174). Fits axles equipped with Type 24 brake chambers. Reliable for high-torque heavy-duty applications requiring precision automatic adjustment.
CROSS-REFERENCE(S):
05-763, 064174, 065174, 065247, 137.281, 137.2810, 139.2832, 286960N, 40020240, 65174, 65174P, 745065174, 745-065174, ABPN42AS065174, AM1372810, A35-3275-Z-1144, A3275X55114428, BEN-065174, BEN-K043197KT, BER-065174, BW K041771, BW K043197, BW-K043197, BW064174, BW065174, BW065247, BX064174, BX065174, BX065247, BX1065174, BXK041771, BXK043197, CS56040, E-11417, E-15024, K034076, K041397, K041771, K041771BXW, K043197, K043197BXW, K065174, MK42100S, MER-R802446, MER-R802447, OTR-OTR65174, R801079, R802446, S-23552, S23552, SA2174, SCSA65174, TDAR801079, 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 follow OEM and manufacturer installation instructions
✔ Ensure proper torque spec and alignment during install
✔ Verify clevis compatibility (1/2" pin, 0.625"–18 TPI thread)
✔ Lubricate if model includes a zerk fitting; some are permanently lubricated
✔ Confirm brake chamber compatibility (Type 24 recommended)
✔ Inspect periodically for wear, function, and initial adjustment setting
✔ Install in correct axle position; typically used in drive or trailer axles
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