CAT 489-2175 Bearing Assembly-Roller

CAT 489-2175 is a Caterpillar original single-row tapered roller bearing assembly, commonly used in heavy-duty rotating parts such as gearboxes, drive axles, or final drives. The following is purely accurate information (without additional description):

Core Parameters and Information

Item Details
Part Model: CAT 489-2175 (4892175) Single-row tapered roller bearing assembly (including inner ring, outer ring, rollers, and cage)

Part Type: Tapered roller bearing assembly, suitable for drive shafts, differentials, or gearbox output shafts, withstands radial + bidirectional axial combined loads, suitable for medium-to-high speed rotating conditions

Material: Outer ring / Inner ring: Chromium-molybdenum alloy steel (SAE 52100), Rollers: High-carbon chromium bearing steel, Cage: Stamped steel plate / Phenolic resin, Hardness HRC60-64

Key Dimensions: Inner diameter 69.85mm, Outer diameter 120.65mm, Total width 36.51mm, Taper angle 10°15′, 18 rollers, roller diameter 12.7mm

Structural Features: Double-row tapered roller bearings, outer ring with dust lip, inner ring with single flange, cage made of stamped steel plate, suitable for 69.85mm diameter journals, clearance 0.015-0.035mm

Compatible Structure: Suitable for 69.85mm journals, installation tolerance: journal k5, bearing housing bore H7, operating temperature -40℃ to +120℃, rated dynamic load 112kN, rated static load 145kN

Lubrication Requirements: Oil lubrication, recommended CAT 9X-2010 gearbox oil, oil level must submerge the center of the lowest roller in the bearing, change oil every 2000 working hours

Compatible Models and Assemblies:

Excavator: CAT 320D2, 323F, 326GC (Slewing Gearbox Output Shaft, Travel Drive Axle Main Reducer)

Loaders: CAT 930M, 938M (Second Shaft of Transmission, Front Drive Axle Differential)

Compatible Assemblies: 320D2 Slewing Gearbox Output Shaft Bearing Assembly, 930M Transmission Second Shaft Bearing Assembly

Matching Parts: 489-2175 Bearing Assembly, 8T-4125 Shaft Retaining Ring, 161-8220 Sealing Ring, 5P-1949 Bearing End Cap

Installation and Fitting Points: Before installation, clean the journal, bearing housing bore, and bearing to remove iron filings and oil. Use hot mounting (heat bearing to 80-100℃) or cold pressing installation, with a pressure ≤50kN. Do not strike the bearing end face to avoid deformation.

The journal fit tolerance is k5, and the bearing housing bore fit tolerance is H7. After installation, the bearing end face should fit snugly against the housing bore without any gap, and the shaft should rotate without any jamming. The radial clearance should be 0.015-0.035mm.

After installation, inject the specified type and amount of lubricating oil. Check for leaks before installing into the machine.

Use a special puller for disassembly to avoid damaging the housing bore or journal. When replacing, check the journal wear (≤0.05mm). If it exceeds the tolerance, replace the journal or the entire shaft assembly simultaneously.