CAT 101-8509 BUSH

CAT 101-8509 (1018509) is a Caterpillar original straight-tube steel-backed composite bushing, suitable for steering and transmission linkage joints in loaders, graders, and other equipment. The following is purely precise information (no additional description): Cat®…

Core Parameters and Information

Item Details
Part Model: CAT 101-8509 Straight-tube steel-backed composite bushing

Part Type: Steel backing + bronze powder sintered layer + PTFE self-lubricating inner liner, straight-tube bushing, withstands radial loads, suitable for linkage joints and steering tie rod joints, maintenance-free and self-lubricating

Material: Steel backing Q235B (HB180-200), bronze powder sintered layer (thickness 0.3-0.5mm), PTFE + glass fiber inner liner (thickness 0.2-0.3mm), salt spray test ≥96h

Key Dimensions: Inner diameter 50.80mm (2.0000in), outer diameter… 63.50mm (2.5000in), length 76.20mm (3.0000in), wall thickness 6.35mm, chamfer 1.5×45°, fit tolerance H7

Structural Features: Self-lubricating without oil grooves, line contact load bearing, suitable for oil/grease lubrication, rated dynamic load 55kN, rated static load 120kN, coefficient of friction μ≤0.06 (dry state), operating temperature -30℃ to 120℃

Compatible Structures: Steering link hinge bushing, gearbox shift link bushing, used with 101-8510 retaining ring, 101-8511 spacer, installation interference 0.020-0.030mm

Applicable Working Conditions: Articulated parts of construction machinery, low-speed oscillation (≤60 times/min), medium load (≤40kN), suitable for impact loads, suitable for -30℃ to… 120℃ Compatible Models and Assemblies

Loaders: CAT 938M, 950M, 962M (Steering Link Hinge Assembly)

Graders: CAT 140M, 160M (Drive Linkage Bushing Assembly)

Compatible Assemblies: 950M Steering Link Hinge Assembly, 140M Drive Linkage Bushing Assembly

Installation and Fitting Points
The seat hole should be clean and free of burrs. Use a special press for cold pressing installation. The interference fit should be 0.020-0.030mm. Do not strike the end face to avoid deformation of the steel backing and liner detachment.

Before installation, check that the liner is free of scratches and the steel backing is free of cracks. The inner diameter roundness should be ≤0.01mm, and the surface roughness Ra ≤0.8μm.

After assembly, the clearance between the axle and the bushing should be 0.05-0.10mm. There should be no jamming during swinging, radial runout ≤0.05mm, and no abnormal noise.

Use a puller to remove it; do not pry the steel backing. When replacing, replace the bushing, retaining ring, and spacer as a whole to ensure a precise fit.