Description
CAT 004-4555 RETAINER
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CAT 004-4555 is a Caterpillar genuine bearing retainer (pure original factory information, no additional description):
Core Parameters and Information
Item Details
Part Model: CAT 004-4555 (0044555) Retainer
Part Type: Bearing Shaft End Retainer (Flange-type Locking Nut + Locking Washer Integrated Structure), used to lock the bearing inner ring, preventing axial movement and circumferential rotation
Material: Alloy structural steel (40Cr), tempered + blackened surface treatment
Key Dimensions: Thread M85×2 mm, flange outer diameter 110 mm, thickness 15 mm, 12 locking teeth, wrench groove width 18 mm
Structural Features: Flange with locking teeth, nut with wrench groove, works with locking washer to prevent loosening, integrated installation, reliable anti-loosening
Surface Treatment: Blackened (oxidized) treatment, rust prevention level meets CAT standard C1
Matching Method Fits the shaft end thread (6g), flange end face presses against the bearing inner ring, locking gasket for anti-loosening.
Operating temperature: -40℃ ～ +120℃
Preload torque: 180–200 N·m
Weight: 0.82 kg
Compatible models and assemblies:
Excavators: CAT 320D2, 323D2, 326D2 (swing motor output shaft, travel gearbox input shaft bearing fixing)
Loaders: CAT 950M, 966M (gearbox output shaft, drive axle differential bearing fixing)
Matching parts: 004-4555 retainer, locking gasket, bearing, shaft end seal ring, locking bolt
Installation and fitting points: Clean the shaft end thread and bearing inner ring end face, ensuring no oil stains or burrs, and that the thread precision meets the 6g requirement.
Installation sequence: Install bearing in place → Install locking washer → Screw in retainer → Tighten with a special wrench to the pre-tightening torque → Bend the locking washer teeth to engage with the retainer flange teeth to prevent loosening.
Post-installation inspection: Retainer is not loose, locking washer is bent in place, bearing axial clearance ≤ 0.02 mm.
Do not reuse: Locking washer and retainer must be replaced after disassembly to ensure anti-loosening performance.
