CAT 141-3049 BEARING

CAT 141-3049 is a dedicated cylindrical roller bearing for Caterpillar radial piston motors. It is suitable for drive motors in skid steer loaders, asphalt pavers, and other models. It is used to support the motor’s eccentric shaft/output shaft and withstand medium to high radial loads. It is a key rotating support component in hydraulic transmission systems. The following is structured technical and application information:

Core Technical Parameters

Item Details
Basic Attributes
Model 141-3049, Type: Single-row cylindrical roller bearing (with inner/outer ring, solid cage), Material: Bearing steel (GCr15, HRC60-64), Weight: Approx. 0.42 kg, Suitable Temperature: -40℃ to +120℃, Mounting Method: Press-fit, No seal, relies on hydraulic oil lubrication, Cage Material: Phenolic resin Cat® Parts Store

Key Dimensions
Inner Diameter: 45 mm (suitable shaft diameter tolerance f6, 44.98-44.99 mm), Outer Diameter: 68 mm (tolerance g6, 67.97-67.99 mm), Width: 22 mm (tolerance ±0.1 mm), Roller Diameter: 5 mm, Number of Rollers: 20, Press-fit Interference: 0.02-0.04 mm

Suitable Models and Locations
Suitable for: Cat® 247/257/267/277/287 series skid steer loader drive motors, AP-500E/BG600D asphalt paver travel motors, CW16/CB-545 compactor vibratory motors, 1 motor per unit, bearing pure radial load (maximum radial force ≤45 kN). Cat® Parts Store

Performance Parameters: Rated radial load 45 kN, limiting speed 6000 rpm (oil lubrication), coefficient of friction ≤0.002, cage-guided inner ring guided design, allows for slight axial displacement of the shaft relative to the bearing (≤0.2 mm).

Structural and Performance Advantages:
High load capacity compatibility: Cylindrical roller line contact design, suitable for frequent start-stop and load fluctuation conditions of hydraulic motors, can withstand the impact radial force during motor operation, ensuring stable rotation of the output shaft.

Compact structure: With inner/outer ring design, no additional bushing is required, directly press-fitted into the motor housing bearing seat, high installation space utilization, compatible with the compact structure of hydraulic motors.

Wear-resistant and temperature-resistant: The bearing steel is quenched, resulting in excellent hardness and wear resistance. The phenolic resin cage is high-temperature resistant and anti-aging, suitable for high-temperature hydraulic oil operation, extending service life.

Low friction and high efficiency: The low coefficient of friction between the rollers and raceways reduces energy loss, improves motor transmission efficiency, and lowers hydraulic system energy consumption.

Installation and maintenance points: Before installation, clean the bearing housing bore, shaft diameter, and bearing, checking for burrs, scratches, and cracks. Press the bearing into the housing bore using a press (pressure 5-8 MPa), ensuring the end face is flush with the bore. Do not strike the rollers or cage to prevent damage.

Maintenance every 2000 hours: Check for abnormal bearing noise, housing temperature (≤90℃), and shaft diameter wear (maximum wear ≤0.05 mm). Replace immediately if exceeding tolerances. Regularly check the hydraulic oil level and cleanliness; Cat HYDO 10 hydraulic oil is recommended for lubrication.

Original parts should be used preferentially. Aftermarket parts may have problems such as insufficient roller precision and insufficient cage strength, which can easily lead to premature wear, roller detachment, and motor jamming and failure.