CAT 088-4113 BUSHING

CAT 088-4113 (0884113) is a Caterpillar genuine bimetallic composite straight-tube bushing for construction machinery. It is compatible with the articulation points of the working devices of 259D3/279D3 skid steer loaders and 906H/907H mini excavators. It is used in conjunction with the 088-2972 bearing and 088-2526 retainer to provide wear-resistant support for the articulation point assembly, reducing friction between the pin and bearing, adapting to high-frequency vibration conditions, and ensuring stable operation of the articulated parts.

Core Parameters and Information

Project Details
Part Model: CAT 088-4113 (0884113) Bimetallic Composite Straight Cylindrical Bushing

Type: Bimetallic Wear-Resistant Bushing for Engineering Machinery Hinge Points

Material: Low-carbon steel backing + copper-lead alloy (CuPb24Sn4) composite layer, tin-plated surface, hardness HB80-100, excellent wear resistance and load-bearing capacity

Key Dimensions: Inner diameter 60mm, outer diameter 70mm, length 38mm, wall thickness 5mm, tolerance H7/g6, compatible shaft diameter φ60mm

Compatible Models: CAT 259D3/279D3 skid steer loaders, 906H/907H mini excavators

Matching Relationship: Compatible with 088-2972 radial ball bearings, 088-2526 elastic retainer rings, 087-1873… Dust ring accessories for wear-resistant support and load transfer in articulated joint assemblies.

Suitable Applications:
Suitable parts: Skid steer loaders, mini excavators, boom and frame, linkages and boom, and other articulated joint assemblies. Used for wear-resistant support between pins and bearings, reducing friction and wear, suitable for frequent load changes and vibration conditions.

Application Scenarios: Outdoor operations such as excavation and loading. The bimetallic composite structure improves wear resistance, reduces increased clearance and abnormal noise at articulated joints due to friction, extends component life, and reduces maintenance costs.

Core Functions: Provides wear-resistant support, reduces the coefficient of friction between pins and bearings; the copper-lead alloy layer has self-lubricating properties, suitable for boundary lubrication conditions; the steel backing enhances structural strength, withstands radial loads, and is suitable for high-frequency vibration conditions.

Installation and Maintenance Points

Installation: Clean the mounting holes and bushing. Use a dedicated pressing tool to smoothly press in, ensuring a tight fit with the hole wall without looseness. Install in conjunction with the bearing, retainer, and dust ring, ensuring coaxiality between the bushing, pin, and bearing, preventing axial movement, and ensuring smooth, unobstructed operation.

Maintenance: Check the bushing for wear, deformation, cracks, or looseness every 200 hours. Regularly add CAT DEO special grease; replace immediately if any abnormalities are found to prevent excessive clearance from damaging components.

Replacement: Remove the old bushing and check the mounting holes and pin for damage. Before installing the new bushing, verify the dimensions. After pressing, test the hinge area to confirm there are no abnormal noises or axial movement.