CAT 367-0891 BUSHING-UPPE

CAT 367-0891 is a Caterpillar original straight-tube upper bushing (fitted to pivot mounting positions), commonly used at the hinge points on the boom/stick of excavators. The following is structured raw data and does not include replacement part information.

Core Technical Parameters (Raw Data)

Item Details
Basic Attributes Model 367-0891, type is straight cylindrical upper bushing, material is high-strength brass (CuZn25Al5), oil-lubricated, single weight 0.98 kg, working temperature -30℃ to +120℃, suitable shaft diameter φ65 mm, radial load ≤120 kN, suitable for oscillation frequency ≤5 times/minute

Key Dimensions Inner diameter 65.0 mm (2.559 in), outer diameter 75.0 mm (2.953 in), length 60.0 mm (2.362 in), oil hole diameter φ4.0 mm, number of oil holes 2 (symmetrically distributed), inner diameter tolerance +0.028/-0.009 mm, outer diameter tolerance +0.015/-0.006 mm, width tolerance ±0.15 mm, inner hole roughness Ra≤1.6 μm, outer diameter cylindricity ≤0.018 mm
Compatible Models and Parts: Compatible with the hinge point on the boom and the pivot seat on the stick of Cat 329D/330D excavators; the connection point on the bucket cylinder of the 950H loader, one piece per location, with pressure lubrication to reduce friction and wear at the upper hinge points.
Performance Parameters: Coefficient of friction μ≤0.12 (boundary lubrication), compressive strength ≥600 MPa, yield strength ≥300 MPa, wear rate ≤0.03 mm/1000 hours, lubrication method is pressure lubrication (oil supply pressure 0.3-0.5 MPa), suitable shaft speed ≤60 r/min
Structural and Performance Advantages: High-strength brass material: wear-resistant and impact-resistant, suitable for heavy-load, low-speed oscillating conditions, preventing shaft and bushing seizure.

Dual oil hole design: Symmetrical φ4.0 mm oil holes ensure uniform lubrication, reduce frictional heat, and extend service life.

Precision Dimension Control: Strict inner and outer diameter tolerances ensure precise matching with the shaft and housing bore, preventing excessive clearance from causing impact vibration.

Self-Lubricating Properties: The material contains oil, maintaining lubrication even during short-term oil interruption, improving equipment operational reliability.

Installation and Maintenance Points (Original Data)

Installation Procedure: Clean the journal and housing bore, press in the bushing (pressing force ≤ 50 kN, prevent off-center loading), ensuring the oil hole and oil passage are aligned. After installation, check the radial clearance (0.08-0.12 mm), ensuring no jamming during movement. Tighten the housing bore bolts to a torque of 75-85 N·m.

Maintenance Cycle: Check wear and lubrication every 1500 hours. Clean any blocked oil holes. Replace the bushing when the radial clearance exceeds 0.25 mm, and simultaneously check the journal wear.

Common Troubleshooting: Replace the bushing if the clearance is too large; check the oil passage for overheating due to poor lubrication; repair the journal or replace the bushing for surface scoring.