CAT 077-6793 RETAINER

CAT 077-6793 is a Caterpillar genuine shaft retainer (pure original factory information, no additional description), used for shaft positioning in drivetrain systems, suitable for heavy-duty vibration conditions, and used in conjunction with 077-6194 bearings and 077-6361 retaining rings.

Core Parameters and Information

Item Details
Part Model: CAT 077-6793 (0776793) Circlip

Structure Type: Shaft-mounted elastic retaining ring, open design, with mounting groove, blackened oxidized surface for corrosion protection (CAT)

Material: 65Mn spring steel, quenching hardness HRC 42-48, blackened surface, salt spray test ≥48 h, thickness tolerance ±0.02 mm

Key Dimensions: Inner diameter 100 mm, outer diameter 115 mm, thickness 3 mm, opening width 8 mm, mounting groove diameter 105 mm, groove width 3.2 mm, chamfer 1×45°

Performance Parameters: Axial load ≥15 kN, radial runout ≤0.05 mm, flatness ≤0.03 mm, axial movement after assembly ≤0.05 mm

Compatibility Standard: Complies with CAT retaining ring specifications, dimensional tolerance GB/T 894.1 – 7 grade, surface roughness… Ra≤1.6 μm, hardness conforms to SAE J403Cat

Matching Relationship: Embedded in the mounting groove on the shaft, positioning the inner ring of the 077-6194 bearing to prevent axial movement. Used in conjunction with the 077-6361 retaining ring.

Compatible Models and Application Scenarios

Compatible Parts: Matches 077-6194 tapered roller bearings, 077-6361 bearing retaining rings, and 077-6071 bushings. Used in gearbox intermediate shafts, drive axle differential shafts, hydraulic pump drive shafts, etc., to position the bearing inner ring and limit axial displacement (Cat).

Compatible Equipment: CAT 349D2/352 excavators, 988K loaders, D8T bulldozers, 777 mining trucks, etc., suitable for shaft positioning under heavy-load conditions in transmission systems (Cat).

Matching Installation: One piece is provided for each bearing. During installation, embed the piece into the shaft groove, ensuring it fits snugly against the inner ring end face of the bearing. No bolts are required; the Cat is secured by elasticity.

Installation and Maintenance Points:
Clean the retainer and shaft groove. Check the retainer for deformation, cracks, and corrosion. Measure the inner diameter, thickness, and shaft groove dimensions to ensure tolerance matching.

Use special snap ring pliers to open the retainer opening, embed it into the mounting groove on the shaft, and release the snap ring pliers. The retainer will automatically spring back and lock in place. Check for a seamless fit with the bearing inner ring.

After installation, rotate the bearing. It should rotate freely without jamming. Axial runout ≤ 0.05 mm, radial runout ≤ 0.08 mm, and there should be no abnormal noise.

Maintenance: Check the retainer’s elasticity and wear every 1000 hours. Replace if deformation, corrosion, or wear > 0.1 mm is found. Use special snap ring pliers for disassembly; do not pry forcefully to avoid breaking the retainer.