CAT 077-8864 RETAINER

CAT 077-8864 is a Caterpillar genuine shaft end retainer (pure original factory information, no additional description), used to lock the axial position of drive shaft end components to prevent movement. It is suitable for small to medium-sized power and transmission systems, installed using bolts and a positioning structure, and is suitable for low to medium speed and medium load conditions.

Core Parameters and Information

Item Details
Part Model: CAT 077-8864 (0778864) Shaft End Retainer

Structure Type: Flange-type rigid retainer with a central locating hole, circumferentially distributed mounting holes, and an axial locating step, compatible with shaft end flange connections

Material: 40Cr alloy steel, galvanized and passivated surface treatment, conforming to CAT MES J4202 retainer specification

Key Dimensions: Outer diameter 80 mm, inner diameter 30 mm, thickness 8 mm, locating hole diameter 30 mm, number of mounting holes 4, mounting hole diameter 6 mm, hole spacing circle diameter 60 mm, locating step height 2 mm

Performance Parameters: Rated axial locking force 8 kN, operating temperature -40℃ to +150℃, flatness ≤0.05 mm, runout ≤0.1 mm, hardness HRC32-38

Compatibility Standard: Compatible with SAE J620 Standard shaft end connection; positioning holes are compatible with CAT 077-8727 bearing shaft ends.

Compatibility: Compatible with CAT 306/307 excavators, 242B skid steer loaders, 3044/3054 engines, etc. Can be used with CAT 077-8717 bearing retaining rings, 077-8727 bearings, and 077-8807 drive plates.

Compatible Models and Application Scenarios:
Compatible Equipment: CAT 306/307 mini excavators, 242B/246B skid steer loaders, 3044/3054/3056 engines, hydraulic pump drive shafts, fan drive shafts, etc.

Application Scenarios: Fan drive shaft end locking, water pump shaft end fixing, generator shaft end positioning, hydraulic pump drive shaft end anti-axial movement, etc. Used to lock shaft end components, prevent axial movement, and ensure stable operation of the transmission system.

Matching Installation: Secured to the shaft end with bolts. Used with 077-8727 bearing, 077-8717 bearing retaining ring, and 077-8807 drive plate. Axial clearance after installation should be ≤0.1 mm.

Installation and Maintenance Points: Clean the shaft end, retainer, and mounting bolts. Check the retainer for deformation and cracks, ensure the shaft end dimensions match the retainer, and confirm the mounting holes are intact.

Align the retainer’s positioning holes with the shaft end, ensuring it fits against the drive plate or bearing end face. Tighten the bolts in a crisscross pattern, ensuring the torque meets the equipment manual requirements (generally 20-25 N·m).

Post-Installation Inspection: Ensure the retainer is not loose or wobbly, rotating parts do not interfere, and there is no axial movement.

Maintenance: Check the retainer bolt torque and wear every 1000 hours. Replace the retainer promptly if it is deformed or the threads are damaged to prevent malfunctions caused by loose shaft end components.