CAT 8I-0818 BUSHING

CAT 8I-0818 is a Caterpillar genuine straight-tube universal bushing (sleeve bearing), suitable for rotating parts of loaders, graders, and other working devices. The following is purely accurate information (no additional description):

Core Parameters and Information

Item Details
Part Model: CAT 8I-0818 (8I0818) Straight-tube Universal Bushing

Part Type: Straight-tube universal bushing, used for rotating support between the working device linkage, rocker arm, and frame, bearing radial loads, suitable for low-to-medium speed, light-to-medium load conditions

Material: Low-carbon alloy steel base material, surface hardened (hardness HRC52-58), compatible with lithium-based grease (NLGI 2) lubrication

Key Dimensions: Inner diameter 44.45mm (1.75in), outer diameter 55.56mm (2.1875in), total length 34.93mm (1.375in), chamfered ends 1×45°, fit tolerance H7/r6

Structural Features Flangeless straight-tube structure, no oil groove or oil hole (suitable for centralized lubrication systems), rated radial load 32kN, operating temperature -20℃ to 110℃, static radial clearance 0.012-0.020mm

Compatible Structure: Compatible pin diameter 44.45mm, mounting hole diameter 55.56mm, installation interference 0.015-0.025mm

Applicable Working Conditions: Rotating parts of the working device, speed ≤500rpm, radial load ≤25kN

Compatible Models and Assemblies:

Loaders: CAT 938G, 950G (boom and rocker arm bushing assembly)

Graders: CAT 120G, 140G (drawbridge bushing assembly)

Compatible Assemblies: 938G boom and rocker arm bushing assembly, 140G Traction Frame Bushing Assembly Installation and Fitting Points: Before installation, clean the mounting holes and the outer diameter of the bushing. Use a special press to cold-press it in place. Do not strike the end face to prevent deformation.

After installation, ensure an interference fit (0.015-0.025mm) and a clearance fit (0.012-0.020mm) with the pin to guarantee smooth and unobstructed rotation.

After assembly, check the coaxiality to be ≤0.02mm. Apply lithium-based grease promptly after installation.

For disassembly, use a special puller to remove the bushing. When replacing, check the pin and mounting hole for wear. If the wear is >0.05mm, repair or replacement is required.