CAT 081-9309 BUSHING

CAT 081-9309 (0819309) is a Caterpillar genuine steel self-lubricating bushing for construction machinery. It is compatible with 307E2/308E2 excavators and 242D/246D skid steer loaders, used in the boom, stick, and bucket hinge pin holes. It provides support, wear resistance, and friction reduction, is suitable for high-pressure and vibration conditions, ensures smooth pin rotation, and extends the life of hinged components.

Core Parameters and Information

Item Details
Part Model: CAT 081-9309 (0819309) Bushing

Type: Engineering machinery steel bushing, self-lubricating/oil-lubricating type

Material: 45# carbon steel, surface hardened + phosphated, with copper-based/PTFE self-lubricating layer

Key Dimensions: Inner diameter 40mm, outer diameter 50mm, length 60mm, wall thickness 5mm, chamfer 1×45°

Performance Parameters: Operating temperature -40℃ to +120℃, hardness HRC58-62, radial load ≤70kN, coefficient of friction ≤0.15

Compatible Models: 307E2/308E2 excavators, 242D/246D skid steer loaders

Matching Relationship: Matched with pins and seals, used for support and friction reduction at hinge joints

Compatibility and Application

Compatible Parts: 307E2/308E2 excavator boom – stick, stick – Bucket articulation pin hole; 242D/246D skid steer loader bucket/attachment connection pin hole, preventing direct wear between the pin and the hole wall.

Application Scenarios: Suitable for high-pressure, vibration, and dusty conditions, such as excavation operations and skid steer loader attachment operation, ensuring flexible rotation of the articulated parts, reducing maintenance frequency, and extending component life.

Matchings: Compatible with corresponding specification pins, O-rings, and dust rings to form a reliable articulated pair suitable for equipment operating conditions.

Installation and Maintenance Points

Installation: Clean the pin hole and bushing surface, cold press/hot press in, interference fit 0.01-0.03mm, ensuring no misalignment or clearance; check coaxiality after installation to ensure flexible pin rotation.

Maintenance: Check wear and clearance every 200 hours; replace when radial clearance > 0.5mm; for self-lubricating types, regularly check the lubrication layer; for oil-lubricated types, regularly add grease to avoid dry friction.

Replacement: Disassemble the old part to check the wear of the pin hole. If it is out of tolerance, it needs to be repaired by boring or the part needs to be replaced. Press the new part into the original position to ensure that the interference fit is in place, the sealing ring is installed reliably, and oil and dust are prevented.