CAT 039-6449 BEARING

CAT 039-6449 is a Caterpillar genuine single-row deep groove ball bearing (pure original factory information, no additional description). It is suitable for hydraulic pump drive shafts, fan brackets, or gearbox shafts in C7/C9 engines, 320D/323D excavators, 950H/966H loaders, etc. It can withstand radial loads and allows for slight axial displacement. It is compatible with 039-5618 bore retaining rings, 038-9564 shaft retaining rings, and 038-7406 bearing housings, ensuring smooth operation and reliable positioning of transmission components.

Core Parameters and Information

Item Details
Part Model: CAT 039-6449 (0396449) Single Row Deep Groove Ball Bearing

Type: Deep groove ball bearing, stamped steel cage, double-sided rubber seal (2RS), grease lubrication, suitable for medium and low speed, radial load as the main operating condition

Material: GCr15 bearing steel, outer ring, inner ring, and rolling elements are hardened, cage is made of high-quality stamped steel

Key Dimensions: Inner diameter 70 mm, outer diameter 95 mm, width 13 mm, chamfer 1 mm, weight 0.23 kg

Load Capacity: Radial rated dynamic load 26.8 kN, radial rated static load 17.5 kN, axial rated dynamic load 6.2 kN, axial rated static load 3.5 kN

Limiting Speed: Grease lubrication 4800 r/min, oil lubrication 6000 r/min, suitable for conventional speeds in engineering machinery

Accuracy Class: ISO P0, dimensional tolerance ±0.08 mm rotational accuracy meets general mechanical assembly requirements.
Applicable temperature: -40℃ to +120℃, suitable for engine compartment and transmission system temperature environments.
Sealing type: Double-sided contact rubber seal ring, IP54 protection rating, effectively preventing dust and moisture intrusion and extending grease life.
Compatible models and assemblies:
Compatible parts: CAT 039-5618 bore retaining ring, 038-9564 shaft retaining ring, 038-7406 bearing housing, 038-7407 seal ring
Compatible equipment: CAT 320D/323D excavators, 950H/966H loaders, D6R bulldozers, etc., equipped with C7/C9 engines, used in hydraulic pump input shafts, fan pulley shafts, gearbox secondary shafts, etc.
Matching parts: 039-6449 bearing, 039-5618 retaining ring, 038-9564 retaining ring, 038-7406 Bearing Housing, 038-7407 Seal Ring
Installation and Maintenance Points
**Before installation, clean the journal and bearing housing bore, ensuring they are free of oil, rust, and impurities. Inspect the bearing for damage, deformation, or seal failure.**

Cold Installation Method: Use a special sleeve to press in the inner ring. Do not strike the outer ring or rolling elements to avoid damaging precision. After installation, the bearing should rotate freely without jamming.

After installation, check the axial clearance (0.02-0.05 mm) to ensure proper fit with the retaining ring and bearing housing, with no axial movement.

Maintenance: Check temperature, vibration, and seals every 1500 working hours. If the temperature exceeds 40°C, abnormal noise occurs, or the seal fails, replace immediately. Replace the entire bearing; do not replace only the seal ring or rolling elements.