CAT 231-4085 BEARING

CAT 231-4085 is a Caterpillar genuine single-row tapered roller bearing, suitable for the drive axle differential of wheel loaders/excavators. The following is purely accurate information (without additional description) Cat®…:

Core Parameters and Information

Item Details
Part Model: CAT 231-4085 (2314085) Single-row Tapered Roller Bearing

Part Type: Single-row tapered roller bearing, separable inner/outer ring, withstands radial + bidirectional axial loads, suitable for low-speed, heavy-load, and impact conditions

Material: SAE 52100 high-carbon chromium bearing steel, hardened to HRC60-64, raceway surface roughness Ra≤0.08μm

Key Dimensions: Inner diameter 55.00mm, outer diameter 100.00mm, total width 27.25mm, number of rollers 14, large end chamfer 1.5×45°

Structural Features: Separable inner ring/ Outer ring: stamped steel cage, outer ring with double flanges, inner ring with single flange, contact angle 15°.
Compatible Structure: Journal fit tolerance k6, bearing housing fit tolerance J7, rated radial load 112kN, rated static load 135kN, operating temperature -40℃ to +120℃.
Lubrication Requirements: Oil lubrication (CAT DEO-ULS 15W-40) or grease lubrication (CAT 4V-9668), grease filler filler 1/3 of bearing cavity.
Compatible Machines and Assemblies:
Loaders: CAT 938M, 950M (front drive axle differential planetary carrier)
Excavators: CAT 320GC, 323GC (travel drive axle main reducer)
Compatible Assemblies: Drive axle differential support bearing assembly, main reducer input shaft bearing
Matching Parts: 231-4085 bearing, 8T-4125 elastic retaining ring, 320-8563 Bushing (for positioning)
Installation and Fitting Points
**Before installation, clean the journal, inner ring, outer ring, and roller assembly to remove iron filings and oil.** Cold press installation is required; pressure ≤25kN. Do not strike the inner or outer ring end faces to avoid deformation.

Journal fit tolerance: k6. Interference fit between the inner ring and the shaft: 0.018-0.035mm. After installation, the inner ring end face should fit snugly against the shaft shoulder without gaps, and rotation should be smooth.

Bearing housing fit tolerance: J7. Interference fit between the outer ring and the bearing housing: 0.008-0.018mm, ensuring space for thermal expansion and contraction.

Adjust axial clearance during installation to 0.020-0.035mm. Use a dedicated puller for disassembly to avoid damaging the journal/bearing housing.