Description
CAT 6V-1780 Track Roller Bearing
| CAT 6V-1780 Track Roller Bearing |
| CAT 544-4871 RING-WEAR-GD |
| CAT 396-0666 BEARING-SLV-GD |
| CAT 4D-2305 RETAINER |
| CAT 6J-0684 TRUNNION |
| CAT 374-1461 BEARING-SLV-GD |
| CAT 4K-1098 TRUNNION |
| CAT 209-5871 BUSHING |
The CAT 6V-1780 is a Caterpillar original equipment manufacturer (OEM) single-row radial ball bearing (ring ball bearing) for track loaders, suitable for track loader/bulldozer track roller axles. The following is purely accurate information (without additional description):
Core Parameters and Information
Item Details
Part Model: CAT 6V-1780 (6V1780) Ring Ball Bearing for Track Loaders
Part Type: Single-row radial ball bearing (with cage), bearing radial loads, suitable for low-speed, heavy-duty conditions
Material: Inner ring / Outer ring / Balls: GCr15 bearing steel (hardened HRC60-64), Cage: Reinforced nylon PA66-GF25
Key Dimensions: Inner diameter 45.00mm (k6 tolerance), outer diameter 85.00mm (h7 tolerance), width 20.00mm; Ball diameter 9.525mm, number of balls 10, chamfered r1.0mm
Structural Features: Double-sided stamped seal, pre-filled with lithium-based grease, radial clearance C3 (0.012-0.025mm), outer ring with mounting groove
Matching: Inner ring interference fit with track roller axle (0.010-0.018mm), outer ring transition fit with track roller housing (H7 tolerance)
Rated Load: Dynamic radial load 28.2kN, static radial load 15.8kN
Limiting Speed: Grease lubrication 1800rpm (actual track roller operating conditions ≤500rpm)
Operating Temperature: -30℃ to +120℃
Weight: 0.48kg
Compatible Models and Assemblies:
Crawler Loaders: CAT 963B, 973
Bulldozers: CAT D6R, D7R (track roller assembly)
Crawler Tractors: CHALLENGER 65C/65D, 75C/75D, 85C/85D
Engine Compatibility: CAT 3116, 3176, 3176C, 3196, 3306 (matching hydraulic power box connecting rod assembly)
Matching parts: 6V-1780 bearings, seals (12-3456), lock nuts (8T-4123), shaft retaining rings (9X-3456)
Installation and fitting points: Clean the track roller journal and housing bore, ensuring no burrs or rust. Surface roughness Ra≤1.6μm, journal hardness HRC55-58.
Cold press fitting. Apply force evenly to the inner ring end face using a special tool. Do not strike the outer ring/seals.
After installation, check radial runout ≤0.03mm, axial runout ≤0.04mm, bolt preload torque 55-65N・m.
No additional grease required (factory prefill amount is 2/3 of the bearing cavity volume, lithium-based grease NLGI 2).
