CAT 065-2745 BEARING A

CAT 065-2745 is a Caterpillar original integrated bearing assembly (pure original factory information, no additional description). It is a pre-assembled assembly including a single-row cylindrical roller bearing, a preloaded outer ring, a dust seal, and a mounting base. It is compatible with the rear end of the hydraulic pump drive shaft of C7/C9 engines and works with the 065-0629 oil retainer, 064-3915 spring, and 064-3839 retainer, simplifying installation and ensuring stable transmission and reliable sealing.

Core Parameters and Information

Project Details
Part Model: CAT 065-2745 (0652745) Integrated Bearing Assembly (including NU type cylindrical roller bearing + outer ring preload ring + double lip dust seal + positioning mount)

Bearing Type: Single row cylindrical roller bearing (NU309ECP, inner ring double flange, outer ring axially movable, only bears radial load)

Material: Inner and outer rings + rolling elements: GCr15 bearing steel (HRC60-64); cage: ZL104 cast aluminum; sealing lip: NBR rubber; mounting base: 45 steel (quenched and tempered HRC28-32), total weight 1.2 kg

Key Dimensions: Bearing inner diameter 45 mm, outer diameter 85 mm, width 20 mm; mounting base outer diameter 100 mm, positioning stop diameter 85 mm, bolt hole distribution circle diameter 90 mm (4×M8)

Clearance and Load: Radial clearance C3 (0.015-0.030 mm); Basic rated dynamic load 52.5 kN, static load 48.0 kN; Limiting speed: oil lubrication 8500 RPM, grease lubrication 6000 RPM
Sealing structure: Double-lip dust seal (inner lip oil-proof, outer lip dust-proof), suitable for bearing cavity pressure ≤0.3 bar, operating temperature -40℃ to 120℃
Compatible models and assemblies
Compatible parts: 065-0629 oil retainer ring, 064-3915 spring, 064-3839 retainer, 064-2311 washer, 352-0618 drive shaft
Compatible equipment: CAT 320D2/323D2/329D2 excavators, 950K/966K loaders, D6T/D7E bulldozers (C7/C9) (Engine), used for the rear support of the hydraulic pump drive shaft and accessory drive shaft bearing housing assembly.

Matching installation: 065-2745 component + 065-0629 oil retainer ring + 064-3915 spring + 064-3839 retainer + M8×16 socket head cap screws (torque 12-15 N・m)

Installation and maintenance points:

Clean the drive shaft journal and mounting hole, check for damaged component seals, ensure bearing rotation is flexible, and confirm the preloaded outer ring is not loose.

Hot-fit the inner ring (80-100℃, interference fit 0.010-0.018 mm), press the mounting seat until it fits snugly against the shaft shoulder, with the sealing lip facing the oil retainer ring side, clearance 2.0-2.5 mm.

Install the retainer and spring (pre-compression 3 mm), tighten the screws diagonally and evenly, check the bearing axial movement ≤0.10 mm, and ensure there is no jamming or abnormal noise.

Maintenance: Check temperature (≤80℃) and vibration every 2000 hours, change grease every 6000 hours, and replace the entire component when the sealing lip wear exceeds 0.8 mm or the bearing is damaged.