CAT 077-4243 RETAINER

CAT 077-4243 is a Caterpillar genuine retainer (pure original factory information, no additional description), a shaft elastic retainer (external retaining ring), adapted for shafts/rod components of CAT engineering machinery, used for axial positioning to prevent movement and ensure stable component operation.

Core Parameters and Information

Item Details
Part Model: CAT 077-4243 (0774243) Retaining Ring

Structure Type: Retaining ring for shafts, with opening and double mounting jaws, external clamping axial limiting structure

Material: 65Mn spring steel, blackened surface oxide, hardness HRC47-51, tensile strength ≥1250 MPa

Key Dimensions: Inner diameter 42 mm, outer diameter 49 mm, thickness 1.5 mm, opening width 5 mm, jaw diameter 2.5 mm, fitting shaft groove width 1.6 mm

Performance Parameters: Operating temperature -40℃ to 180℃, elastic recovery rate ≥95%, shear strength ≥800 MPa, anti-loosening axial force ≥7.5 kN

Compatibility Standard: Complies with CAT locking ring technical specifications, dimensional accuracy IT9 grade, surface roughness Ra≤1.6 μm Compatible Models and Assemblies

Compatible Parts: Various shafts, bearings, bushings, and other components requiring axial positioning.

Compatible Equipment: CAT 326D2/330D2 excavators, 980M loaders, D8T bulldozers, etc., used for axial positioning of shaft components such as gearboxes, hydraulic pumps, and travel mechanisms.

Installation: 1-2 pieces depending on the machine model and location. Install in the shaft groove to prevent axial movement of parts.

Installation and Maintenance Points

Clean the shaft groove and retainer. Check the retainer for deformation, cracks, gaps, normal elasticity, and intact clamp holes.

Use shaft retainer pliers to pry open the retainer and insert it into the shaft groove, ensuring it is fully engaged at the bottom of the groove and fits snugly against the end face of the part without gaps.

After installation, check that the axial movement of the part is ≤0.03 mm, and that it operates smoothly without jamming or abnormal noise.

Maintenance: Check the elasticity and installation condition of the retainer every 2000 hours. Replace immediately if deformation, decreased elasticity, or breakage occurs to prevent part displacement and damage.