CAT 479-4645 BEARING-GROO

CAT 479-4645 (4794645) is a Caterpillar genuine Grooved Straight Sleeve Bearing with internal lubrication grooves, suitable for medium-load engineering machinery articulated/transmission parts. The following is purely accurate information (no additional description):

Core Parameters and Information

Item Details
Part Model: CAT 479-4645 Grooved Straight Sleeve Bearing

Part Type: Grooved Straight Sleeve Bearing with internal lubrication grooves, used for radial support between pins and structural components, suitable for medium-load articulated/transmission parts requiring continuous lubrication, reducing friction and wear

Material: Steel backing + tin bronze alloy anti-friction layer (steel backing Q345, alloy layer CuSn8, layer thickness 0.25-0.30mm), surface hardness HB180-220, inner wall with full circumferential lubrication grooves + 2 axial oil grooves

Key Dimensions: Inner diameter 50.00 mm, outer diameter… 60.00 mm, total length 50.00 mm, wall thickness 5.00 mm, lubrication groove width 2.00 mm, groove depth 0.80 mm, axial oil groove length 45.00 mm, chamfered ends 0.5×45°

Structural Features: Straight cylindrical structure with uniform wall thickness, full circumferential lubrication groove on the inner wall + axial oil groove, fixed to the structural component mounting hole by interference fit, and rotates with a clearance fit pin.

Compatible Structures: Suitable for small and medium tonnage excavators, boom/stick pins, connecting rod/rocker arm mounting holes, and transmission system pivots for radial positioning and load transfer.

Applicable Working Conditions: Low to medium speed, medium load, suitable for -30℃ to 100℃, grease lubrication, dusty, and moderate vibration and impact working environments.

Compatible Models:
CAT 307E2/308E2 mini excavators (boom and stick hinge point, boom and frame connection end)
CAT 908M/909M Wheel Loader (arm and boom hinge, bucket cylinder connecting rod end)

CAT 422F2 Backhoe Loader (boom and frame hinge, bucket connecting rod pivot)

CAT 140M3 Grader (draw frame and frame hinge, scraper cylinder connecting rod end)

Installation and Fitting Points:

The bearing should have an interference fit with the structural component mounting holes (interference 0.015–0.025 mm), and a clearance fit with the pin (clearance 0.040–0.060 mm) to ensure smooth and unobstructed rotation.

Use a dedicated pressing tool to press the bearing in smoothly; do not directly strike the bearing end face. After installation, the bearing end face should be flush with the structural component plane, without skewing or looseness.

Before installation, clean the bearing, mounting holes, and pin. Check the bearing for cracks, deformation, and ensure the friction-reducing layer is intact and the lubrication grooves are unblocked.

Radial positioning is achieved through mounting holes, and axial positioning is achieved through structural step limits. After installation, check that the hinged joint rotates smoothly without jamming, the radial runout of the pin is ≤0.07 mm, and there are no abnormal clearances.

According to the machine manual, replenish grease every 1500 working hours and check the bearing clearance every 2000 working hours. Replace the bearing if the clearance exceeds 0.15 mm.