CAT 077-8701 RETAINER

CAT 077-8701 is a Caterpillar genuine shaft end retainer (pure original factory information, no additional description), used for axial positioning and anti-loosening of shafts and bearings. It is suitable for small to medium-sized power and transmission components, and is rigidly fastened with bolts. It is suitable for low to medium speed and medium load conditions.

Core Parameters and Information

Item Details
Part Model: CAT 077-8701 (0778701) Shaft End Retainer

Structure Type: Circular flange, central bore, 4 evenly distributed bolt holes, with positioning step, stop fit positioning

Material: 45# carbon steel, galvanized and passivated surface, conforms to ASTM A105 standard

Key Dimensions: Flange outer diameter 65 mm, center bore diameter 30 mm, 4 bolt holes (evenly distributed diameter 55 mm), bolt size M8×1.25, thickness 10 mm, stop diameter 32 mm

Performance Parameters: Rated axial force: 10 kN, bolt preload torque: 18-22 N・m, temperature resistance: -40℃ to +120℃, salt spray test ≥96 h

Compatibility Standard: Conforms to CAT MES J5102 fastener specification, compatible with SAE J120 shaft positioning standard

Matching Relationship: Through the stop and bearing outer ring / End cap positioning, bolted to the housing, used for axial positioning of fan drive shaft bearings, water pump shaft ends, etc.

Compatible Models and Application Scenarios

Compatible Equipment: CAT 306/307 mini excavators, 242B skid steer loaders, 3044/3054 engines, C3.4 engine fan drive systems, etc.

Application Scenarios: Fan drive shaft bearing positioning, water pump shaft end fixing, generator bearing end cap clamping, hydraulic pump drive shaft positioning, etc., especially suitable for axial anti-migration of bearings and end cap sealing in power transmission systems.

Installation: One piece per bearing position, fits snugly against the bearing inner ring/end cap, bolted securely. Axial clearance ≤0.1 mm after installation. Can be used with 077-8625 bearing retainer rings.

Installation and Maintenance Points: Clean the mounting surface, retainer, and bolts. Check the retainer for deformation and cracks, ensure the stop matches the bearing outer ring/end cap, and that the bolt threads are intact.

Align the stop with the bearing outer ring/end cap, insert the bolts, and tighten evenly to 18-22 N·m using a torque wrench in 2-3 passes.

Post-installation inspection: The retainer should fit tightly against the mounting surface without looseness, rotating parts should not interfere, and there should be no leakage at the seals.

Maintenance: Check the bolt tightness and retainer deformation every 1000 hours; replace the retainer if it is deformed or the bolts are loose to prevent bearing displacement and equipment failure.