CAT 374-6516 BEARING-SLV-GD

CAT 374-6516 is a Caterpillar genuine YM sleeve bearing (straight-tube steel bushing), suitable for heavy-duty articulated joints. The following is purely precise information (no additional description):

Core Parameters and Information

Item Details
Part Model: CAT 374-6516 (3746516) YM Sleeve Bearing (Straight-tube, no flange, with lubrication groove)

Part Type: Heavy-duty steel sleeve bearing, compatible with pins and mounting holes, withstands radial static load ≤95kN, dynamic load ≤52kN

Material: 20CrMnTi alloy steel, surface carburized and quenched + polished, hardness HRC58-62, wear-resistant layer thickness 0.4-0.6mm

Key Dimensions: Inner diameter 50.80mm (2.000in), outer diameter 63.50mm (2.500in), length 76.20mm (3.000in), wall thickness 6.35mm, chamfered ends 1.5×45°, lubrication groove depth 0.8mm, width 3mm

Structural Features: Straight cylindrical type, no flange, inner wall with spiral lubrication groove + annular oil grooves at both ends, interference fit 0.02-0.03mm, compatible with standard pins

Compatible Structure: Compatible pin diameter 50.80mm (tolerance h7), mounting hole diameter 63.50mm (tolerance H7), hole surface roughness Ra≤0.8μm

Applicable Working Conditions: Excavator boom and stick hinge points, loader bucket cylinder lugs, working pressure 0-30MPa, swing angle ≤±12°, speed ≤80rpm

Compatible Models and Assemblies:

Excavators: CAT 320D2, 323D2, 336D2 (boom-stick hinge bushing assembly)
Loaders: CAT 966H, 972H (Bucket Cylinder Upper Earring Sleeve Bearing Assembly)
Compatible Assemblies: 320D2 Boom-Stick Hinge Bushing Assembly, 966H Bucket Cylinder Upper Earring Sleeve Bearing Assembly
Installation and Fitting Points:

Clean the mounting hole and bushing before installation. Use cold pressing method for installation; hot fitting is prohibited to prevent deformation. After pressing, the bushing end face should be flush with the mounting hole end face, with an axial deviation ≤0.03mm.

After pressing, ream the hole to 50.80mm (H7). After reaming, the surface roughness Ra ≤0.4μm, with no scratches and an ellipticity ≤0.015mm.

After assembly, check for radial runout ≤0.04mm, and a pin-bushing fit clearance of 0.01-0.02mm, ensuring smooth swing without abnormal noise.

For disassembly, use a special puller to remove the bushing. When replacing, check for wear in the mounting hole. If the wear >0.05mm, repair or replace the mounting seat.