CAT 379-2544 40mm Outside Diameter Straight Sleeve Bearing

CAT 379-2544 (3792544) is a Caterpillar genuine bushing, commonly used in the hinge/rotating parts of chassis and working devices, providing wear-resistant support and load cushioning. The following is precise original equipment manufacturer (OEM) information (pure OEM part, no substitutes):

Core Parameters and OEM Information

Item Details
Part Model: CAT 379-2544 Bushing (OEM)

Part Type: Steel-backed composite self-lubricating bushing (steel back + bronze alloy + PTFE coating), suitable for medium-load hinge/rotating parts

Material: Steel back (Q235 steel) + bronze alloy intermediate layer + PTFE self-lubricating surface layer, with oil reservoir for oil-free/low-oil operation

Key Dimensions: Inner diameter approx. 50.00 mm (1.969 in), outer diameter approx. 65.00 mm (2.559 in), length approx. 70.00 mm (2.756 in), with 30° angles at both ends Chamfered for easy press-fit positioning

Structural Features: Thin-walled cylindrical shape, flangeless design, evenly distributed axial oil reservoirs inside the bore to reduce the coefficient of friction and improve wear resistance

Compatible Structures: Compatible with pins (e.g., 379-2546, 379-2547) and retaining rings (379-2548) for rotating parts such as boom/stick articulations, connecting rods, and chassis suspensions.

Applicable Working Conditions: Medium load, frequent swinging/rotation, suitable for dusty and humid outdoor working environments.

Compatible Models (Original Equipment Manufacturer Matching):

CAT 320D/323D Excavators (Boom/Stick Articulations, Connecting Rods)

CAT 966M/972M Wheel Loaders (Working Device Connecting Rods, Steering Knuckles)

CAT D6K/D6N Bulldozers (Track Frame, Working Device Articulations)

CAT 432F2/434F2 Backhoe Loaders (Frame/ (Hinged Working Device)

Installation and Fitting Points (Original Factory Standard)

Clear fit with the pin, standard radial clearance 0.020–0.035 mm, ensuring smooth and unobstructed rotation.

Interference fit with the mounting seat hole (interference 0.025–0.045 mm), cold-pressed assembly using a special press-fitting tool; do not strike the bushing body.

Clean the journal and seat hole before installation, removing burrs, rust, and impurities. Pre-install the seals and retaining ring.

Axial positioning is achieved using the retaining ring/step to prevent movement. After installation, check: the bushing rotates smoothly, without abnormal noise or axial movement, and the lubrication channels are unobstructed.

Add the specified grease according to the model manual. After initial lubrication, replenish grease every 500 working hours.