CAT 493-3144 BEARING-BALL

CAT 493-3144 is a Caterpillar original single-row deep groove ball bearing, suitable for gearbox/transfer case input shaft/intermediate shaft, used for radial support and low axial thrust conditions. The following is precise original part information:

Core Technical Parameters
Item Details
Part Model: CAT 493-3144 (4933144) Single-row deep groove ball bearing, weight approximately 0.82 kg (1.81 lb), suitable for gearbox input shaft/transfer case intermediate shaft radial support conditions

Core Material: GCr15 high-carbon chromium bearing steel, inner and outer rings integrally quenched and tempered, hardness HRC 60-64, balls are bearing steel GCr15SiMn, cage is reinforced nylon PA66+GF30, rust-resistant, suitable for vibration and impact conditions in engineering machinery

Key Dimensions: Inner diameter 63.5 mm (2.50 in), outer diameter 120.65 mm (4.75 in), width… 29.37 mm (1.156 in), chamfer R1.5 mm, standard single-row deep groove structure, double-sided metal dust cover (non-contact).

Structural Features: Single-row deep groove design, capable of withstanding radial loads and bidirectional low axial thrust; cage is riveted for fixation; dust cover protection; suitable for medium-low speed heavy-duty conditions, ensuring stable operation of transmission components.

Compatible Models: Compatible with CAT 3406E/3456 diesel engines (transmission input shaft bearing), D8R/D8N bulldozers, 980G/988G loaders (transmission intermediate shaft bearing), 777D mining trucks (transfer case support bearing).

Accessories: Compatible with 63.5 mm diameter input shaft/intermediate shaft; matching seals: CAT 124-9945 bushing, 2S-8359 sleeve; installation tool: CAT 1U-7360. Bearing Puller
Core Functions and Installation Points
Radial Support and Friction Reduction: Used for radial positioning of gearbox/transfer case shafts, reducing friction between the shaft and housing, bearing radial loads and low axial thrust, suitable for medium- and low-speed heavy-load conditions, ensuring stable operation of transmission components.
Installation Specifications
Clean the journal and bearing housing bore, removing oil and burrs. Check the compatibility of the journal tolerance (k6) and bearing housing bore tolerance (J7).

Use cold pressing or hot oil (80-100°C) to heat-fit the bearing inner ring. Gently press the outer ring into the bearing housing bore; do not hammer, ensuring the bearing is not deformed.

After installation, check the radial clearance (0.015-0.035 mm) to ensure smooth operation and prevent jamming.

Maintenance Recommendations
Check bearing noise and temperature rise every 2000 operating hours. If the temperature exceeds 80°C or there is abnormal noise, disassemble, inspect, and replace with a genuine bearing.

When replacing, you must use the original CAT 493-3144 part of the same model to avoid premature bearing failure due to incompatible size or material.