CAT 535-6335 BUSHING-SEM

CAT 535-6335 is a Caterpillar SEM series original steel bushing, suitable for the boom, stick, and other structural joints of loaders, excavators, and other equipment. It is used for pin positioning and wear protection. The following is purely accurate information (without additional description):

Core Parameters and Information

Item Details
Part Model: CAT 535-6335 (5356335) SEM Steel Bushing

Part Type: Integral straight cylindrical steel bushing, used between the pin and the mounting hole, bearing radial load, providing wear resistance and positioning

Material: Boron alloy structural steel (SAE 10B21), carburized and quenched, surface hardness HRC58-62, core hardness HRC30-40, surface roughness Ra≤0.8μm

Key Dimensions: Inner diameter 50.00mm (1.969in), outer diameter 60.00mm (2.362in), length 70.00mm (2.756in), wall thickness 5.00mm, 2×45° chamfers at both ends
Structural Features: Straight cylindrical type without oil grooves, no lubrication holes, chamfered guides at both ends, outer diameter interference 0.010-0.025mm, compatible mounting hole tolerance H7
Compatible Structures: Compatible pin diameter 50.00mm (tolerance h8), mounting seat hole diameter 60.00mm, compatible joint pin clearance 0.030-0.050mm
Applicable Working Conditions: Working load ≤120kN, working temperature -20℃ to +100℃, compatible with medium and low speed swing joints (≤10°/s), grease lubrication recommended (NLGI 2)
Compatible Models and Assemblies:
Loaders: CAT 938K, 950GC, 962M (boom to frame connection joint, stick to boom connection joint)
Excavators: CAT 320GC, 323GX (Stick and Bucket Connection Joint, Boom Cylinder Lugs)

Compatible Assemblies: 938K Loader Boom Joint Bushing Assembly, 320GC Excavator Stick Bushing Assembly

Installation and Fitting Points

Before installation, clean the bushing and mounting holes, ensuring no burrs or rust. Heat the bushing to 80-90℃ for hot fitting, or cold press with a press (pressure ≤40kN). Do not strike.

The bushing should have an interference fit with the mounting hole, achieving 100% fit, with radial runout ≤0.02mm and a clearance of 0.030-0.050mm with the pin.

After installation, check that the bushing end face fits snugly against the mounting seat without gaps, and that the joint swings smoothly without jamming. Regularly apply grease (every 500 working hours).

Use a dedicated puller during disassembly to avoid bushing deformation or damage to the mounting holes. When replacing, it is recommended to replace the entire bushing and pin assembly (CAT 535-6336).