CAT 095-8931 BEARING BALL

CAT 095-8931 (0958931) is a ball bearing for the track tensioner cylinder of the 760GT tracked chassis. It is a deep groove ball bearing structure used for radial support and rotational guidance of the piston/piston rod in the track tensioner cylinder. It is compatible with models such as the 395/374/352/349 excavators and 988/982 loaders. Together with the 095-7947 ​​retainer, 095-8076 spring base, and 095-8343/095-8510 retainer, it ensures stable operation of the track tensioning system.

Cat® Parts Core Parameter Table

Item Details
Part Model CAT 095-8931 (0958931) Ball Bearing (760GT Track Tensioner Cylinder Dedicated)

Bearing Type Deep Groove Ball Bearing (Single Row, Open), Suitable for Low-Speed ​​Heavy-Duty Radial Loads and Slight Axial Displacement

Material Outer Ring / Inner Ring / Balls are GCr15 bearing steel, cage is reinforced nylon, outer ring surface is anodized, hardness HRC58-62, suitable for operating conditions from -40℃ to 120℃

Key Dimensions Inner diameter approx. 60mm, outer diameter approx. 95mm, width approx. 18mm, accuracy class P6 (ISO 492), radial clearance C3, suitable for tensioner cylinder piston rod outer diameter and guide cylinder inner diameter

Compatible Models CAT 349, 352, 374, 395 excavators; 982, 988 loaders (760GT tracked chassis configuration)

Functional Positioning Radial support for the tensioning cylinder piston rod/piston absorbs radial vibration during track tensioning, allows slight axial displacement, reduces friction between the piston and guide cylinder, protects cylinder seals, and works with the retainer and retainer ring to ensure stable tension.

Adaptation and Application

Installation Location: Inside the track tensioning cylinder guide cylinder, located between the 095-8343 piston retainer and the 095-8510 spring retainer. The inner ring is interference-fitted with the piston rod, and the outer ring is clearance-fitted with the guide cylinder. Axial positioning is achieved on both sides by the retainer/retainer ring to prevent bearing movement (Cat® Parts).

Application Scenarios: Heavy-duty, high-frequency impact conditions such as mining and infrastructure construction. It withstands radial loads and vibrations on the piston rod, adapts to dynamic loads during track tensioning/buffering, reduces friction between the piston and guide cylinder, and prevents seal wear, track tension fluctuations, and track misalignment.

Core Functions: Radial support and rotary guidance absorb radial vibration, reduce friction loss, extend the service life of the cylinder, piston rod, and seals, and ensure the stability and reliability of the track tensioning system. Installation and Maintenance Points

Installation: Clean the guide cylinder, bearings, piston rod, and retainer mounting surfaces to remove oil, rust, and impurities. Check the bearings for damage and ensure the balls are not stuck.

Heat the bearing inner ring to 80-90℃ and heat-fit it onto the piston rod. Insert the outer ring into the guide cylinder and adjust it to the installation position. Axially position the bearings on both sides using the 095-8343/095-8510 retainers and the 095-7947 ​​retaining rings to ensure the bearings are not loose or misaligned.

Start the machine and test the extension and retraction of the tension cylinder. Check the bearings for abnormal noise, stable tension, and no sticking.

Maintenance Cycle: Under standard operating conditions, check bearing wear, clearance changes, and cage damage every 1000 hours; for mining conditions, shorten this to 500 hours. Address any abnormalities immediately.

Replacement criteria: Bearings must be replaced if the wear of the outer/inner ring is greater than 0.5mm, the balls are pitted/cracked, the cage is broken/deformed, the radial clearance is greater than 0.3mm, or there is sticking/abnormal noise after installation. Original parts should be given priority to avoid piston rod wear and cylinder damage caused by dimensional deviations.