CAT 077-6071 BUSHING

CAT 077-6071 is a Caterpillar genuine straight-tube steel-backed composite bushing (pure original factory information, no additional description), used for shaft and bore clearance compensation and positioning in engineering machinery transmission systems, reducing friction and wear, and suitable for shaft operation under heavy loads and impact conditions.

Core Parameters and Information

Item Details
Part Model: CAT 077-6071 (0776071) Sleeve Bushing

Structure Type: Straight cylinder, no flange, inner bore with lubrication groove, steel backing + copper-lead alloy anti-friction layer + tin-lead alloy plating, chamfered ends, no grease fitting

Material: Steel backing is 20# steel, anti-friction layer CuPb10Sn10, plating Sn-Pb, thickness 0.05 mm, bonding strength ≥150 MPa

Key Dimensions: Inner diameter 80 mm, outer diameter 90 mm, length 50 mm, chamfer 1×45°, lubrication groove width 2 mm, depth 0.3 mm, 4 grooves evenly distributed circumferentially

Performance Parameters: Radial clearance 0.05-0.10 mm, rated load 25 MPa, coefficient of friction ≤0.08, applicable temperature -40℃ to 120℃, limiting speed 1500 rpm

Compatibility Standards Conforms to CAT bushing specifications, dimensional tolerance GB/T 15044-7, surface roughness Ra≤1.6 μm, and bonding strength ISO 13379.

Matching Relationship: Compatible with CAT 077-5842 bearings and 077-5945 retaining rings. The bushing is press-fitted into the housing bore, with a clearance fit between the shaft and bushing. The interference fit between the bushing and the housing is 0.02-0.04 mm.

Compatible Models and Applications:

Compatible Parts: Compatible with 077-5842 tapered roller bearings, 077-5945 bearing retaining rings, and 077-5974 drive plates. Used in gearbox output shaft bearing housings, drive axle differential housing bores, hydraulic pump housing shaft bores, etc., to compensate for clearances and position the bearing outer ring/shaft diameter.

Compatible Equipment: CAT 349D2/352 excavators, 988K loaders, D8T bulldozers, 777 mining trucks, etc. Suitable for shaft hole positioning in transmission systems, especially suitable for shaft support under heavy load and vibration conditions.

Installation: One bushing is provided for each shaft hole. It is press-fitted into the housing hole, fitting snugly against the bearing outer ring end face to ensure axial positioning accuracy and reduce wear caused by vibration.

Installation and Maintenance Points: Clean the bushing and housing hole. Check that the bushing is free from deformation and plating peeling, and that the housing hole is free from burrs and rust, and that dimensions and tolerances match.

Use a pressing tool to smoothly press the bushing into the housing hole, applying even pressure and avoiding skewing. After pressing, the bushing end face should be flush with the housing hole end face without any steps.

After installation, check that the clearance between the bushing inner diameter and shaft diameter meets requirements, that rotation is flexible without jamming, and that the lubrication groove is unobstructed, ensuring even distribution of grease.

Maintenance: Check the bushing wear every 1000 hours. Replace it when the inner diameter wear exceeds 0.2 mm. Do not knock or press repeatedly after disassembly to avoid deformation of the steel backing and peeling of the coating.