CAT 053-6530 BEARING

CAT 053-6530 is a Caterpillar genuine hydraulic pump needle roller bearing (pure original factory information, no additional description). It is compatible with high-pressure axial piston pumps (such as the CAT 352-0618 main pump) for C7/C9 engines. It is installed between the pump housing and the drive shaft, bearing radial loads and providing positioning to ensure smooth pump shaft operation and hydraulic system stability.

Core Parameters and Information

Item Details
Part Model: CAT 053-6530 (0536530) Needle Roller Bearing

Type: Needle roller bearing with cage, outer ring positioning, inner ring interference fit with shaft, used for radial load bearing and shaft positioning

Material: Needle rollers: GCr15 bearing steel, HRC62-65, surface hardened; Cage: PA66+GF30, wear-resistant and anti-aging; Outer ring: 50Mn, HRC58-62

Key Dimensions: Inner diameter 35 mm, outer diameter 47 mm, width 18 mm, needle roller diameter 3 mm, quantity 12 pieces, weight 0.12 kg, clearance 0.003-0.006 mm

Operating Parameters: Rated radial dynamic load 28 kN, static load 42 kN, suitable speed ≤2200 rpm, working pressure ≤35 MPa, temperature tolerance -40℃ ～ +120℃

Lubrication Method Compatible with self-lubricating hydraulic oil; apply lithium-based grease before installation and ensure unobstructed oil passages after assembly.

Compatible Models and Assemblies

Compatible Parts: 053-5758 Piston, 053-5759 Piston Sleeve, 053-5834 Fixing Gear, 352-0618 Main Pump Assembly

Compatible Equipment: CAT 320D/323D excavators, 950H/966H loaders, D6R bulldozers, etc., equipped with C7/C9 engines.

Matching Parts: 053-6530 Bearing, Bearing Retaining Ring (053-6531), Sealing Ring (053-6532)

Installation and Maintenance Points: Clean the bearing and mounting area before installation, ensuring no burrs or oil stains. Check for missing needle rollers, undamaged cages, and deformed outer rings.

Press the bearing into the pump housing mounting hole using a press, ensuring the outer ring fits snugly against the bottom of the hole and the inner ring is coaxial with the shaft to avoid uneven loading.

After installation, check that the shaft rotates smoothly without jamming or abnormal noise, and that the radial clearance meets requirements. A high-pressure test should show no leakage and stable pressure.

Maintenance: Check bearing wear and lubrication every 2000 working hours. Replace the bearing promptly if abnormal noise or excessive clearance occurs to prevent pump shaft wear.