CAT 066-1298 BEARING

CAT 066-1298 is a Caterpillar genuine single-row deep groove ball bearing (pure original factory information, no additional description), adapted for the front end of the hydraulic pump drive shaft of C7/C9 engines. It is used in conjunction with the 065-9055 retainer, 065-0629 oil retainer ring, 064-3915 spring, and 065-2745 bearing assembly to bear radial loads, limit radial runout of the shaft system, and ensure transmission stability and reliable sealing.

Core Parameters and Information

Item Details
Part Model: CAT 066-1298 (0661298) Single Row Deep Groove Ball Bearing (with dust cover + cage, no sealing lip)

Structure Type: Outer ring with locating groove + stamped steel cage + double-sided dust cover (non-contact type), inner diameter with lubrication groove

Material: Outer ring / Inner ring: High carbon chromium bearing steel (GCr15, quenched HRC60-64); Rolling elements: GCr15SiMn (HRC62-66); Cage: SPCC steel plate; Dust cover: Tin-plated steel plate, weight 0.48 kg

Key Dimensions: Inner diameter 45 mm, outer diameter 85 mm, width 19 mm, locating groove diameter 82 mm (width 3 mm, depth 1.5 mm), lubrication groove depth 0.8 mm, dust cover thickness 0.5 mm

Performance Parameters: Radial rated dynamic load 35.2 kN, radial rated static load 22.8 kN, limiting speed 6000 rpm (grease lubrication), operating temperature -40℃ to 120℃, grease fill 12±2 g
Compatibility Standard: Complies with ISO 6009-1:2014, radial clearance C3 group (0.012-0.028 mm), rotational accuracy P6 grade
Compatible Models and Assemblies
Compatible Parts: 065-9055 retainer, 065-2745 bearing assembly, 065-7804 bearing, 065-0629 oil retainer ring, 064-3915 spring, 352-0618 drive shaft
Compatible Equipment: CAT 320D2/323D2/329D2 excavators, 950K/966K loaders, D6T/D7E bulldozers (C7/C9) (Engine), used for radial support at the front end of the hydraulic pump drive shaft.

Matching installation: 066-1298 Bearing (press-in bearing housing) + 064-3915 Spring + 065-9055 Retainer + 065-0629 Oil retainer ring. Tighten bolts diagonally to 12-15 N·m.

Installation and maintenance points:

Clean the bearing housing bore and journal, checking for burrs, rust, or out-of-tolerance ovality (≤0.01 mm). Heat the bearing to 80-90℃ (do not exceed 120℃) before cold pressing it into the journal, avoiding impact.

Align the bearing outer ring locating groove with the bearing housing locating pin. After press-fitting, check the radial clearance to be 0.012-0.028 mm, ensuring no jamming or abnormal noise during rotation.

Before installing the retainer, fill the bearing with lithium-based grease (NLGI 2, dropping point ≥180℃), filling 1/3-1/2 of the bearing cavity.

Maintenance: Check the bearing temperature (≤80℃) and vibration value (≤2.5 mm/s) every 2000 hours. Replace the bearing if abnormal noise, overheating or clearance exceeds 0.05 mm is detected.