CAT 054-4138 BEARING

CAT 054-4138 is a Caterpillar genuine hydraulic pump thrust ball bearing (pure original factory information, no additional description). It is compatible with the 352-0618 high-pressure axial piston pump for C7/C9 engines. It is used to withstand the axial thrust of the piston assembly within the pump, limiting axial movement. It works in conjunction with the 053-6530 bearing and the 054-3939 retainer to ensure stable pump speed and pressure, and prevent abnormal wear of the piston and slipper.

Core Parameters and Information

Item Details
Part Model: CAT 054-4138 (0544138) Thrust Ball Bearing

Type: Single-direction thrust ball bearing, with cage, flat contact, suitable for axial load conditions

Material: Bearing steel GCr15, ring hardening hardness HRC60-64, ball hardness HRC62-66, cage is reinforced nylon PA66+GF25

Key Dimensions: Inner diameter 45 mm, outer diameter 68 mm, thickness 12 mm, ball diameter 7.938 mm, number of balls 10, weight 0.18 kg

Operating Parameters: Rated dynamic load 18.5 kN, rated static load 35.2 kN, suitable speed ≤3000 rpm, operating temperature -40℃ ～ +120℃, suitable axial load ≤15 kN

Installation Method Press-fitted onto the thrust end face of the pump shaft, fitting snugly against the thrust disc. Clean thoroughly before installation to remove oil contaminants. After installation, check axial clearance to be 0.05-0.15 mm, ensuring no jamming.

Compatible Models and Assemblies

Compatible Parts: 053-6530 Bearing, 054-3939 Fixing Device, 054-4003 Oil Baffle Ring, 352-0618 Main Pump Assembly

Compatible Equipment: CAT 320D/323D/329D Excavators, 950H/966H Loaders, D6R/D7R Bulldozers, etc., equipped with C7/C9 engines.

Matching Parts: 054-4138 Bearing, 053-5760 Return Spring, 053-5758 Plunger, 053-5759 Piston Sleeve Installation and Maintenance Points: Before installation, clean the bearing, pump shaft thrust end face, and thrust disc, ensuring they are free of burrs and rust. Inspect the bearing for cracks and the cage for damage, and ensure the balls rotate freely.

Use a dedicated press to press smoothly, avoiding impact, and ensure the bearing end face is perpendicular to the pump shaft without misalignment.

After installation, measure the axial clearance, ensuring it meets the requirement of 0.05-0.15 mm. Test the pump shaft rotation for smooth rotation without jamming or abnormal noise.

Maintenance: Check bearing wear and clearance every 2000 working hours. Replace the bearing immediately if abnormal noise, clearance exceeding tolerance, or ball damage is observed to prevent pump assembly failure.