CAT 077-8634 RETAINER

CAT 077-8634 is a Caterpillar genuine flange-type bearing retainer (pure original factory information, no additional description), used for axial positioning and anti-loosening of the fan drive shaft and bearing. It is suitable for small to medium-sized power systems, relying on bolt rigidity for fastening, and is suitable for low to medium speed and medium load conditions.

Core Parameters and Information

Item Details
Part Model: CAT 077-8634 (0778634) Bearing Retainer Plate

Structure Type: Circular flange, central through-hole, 3 evenly distributed bolt holes, with positioning step, stop fit positioning

Material: Q345 carbon steel, galvanized and passivated surface, conforms to ASTM A36 standard

Key Dimensions: Flange outer diameter 52 mm, center hole diameter 25 mm, 3 bolt holes (evenly distributed diameter 42 mm), bolt specification M10×1.5, thickness 8 mm, stop diameter 28 mm

Performance Parameters: Rated load axial force 8 kN, bolt preload torque 32-38 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 fit with the 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 307/308 mini excavators, 226B/236B skid steer loaders, 3054/3056 engines, C4.4 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 32-38 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.