CAT 095-7577 RETAINER

CAT 095-7577 (0957577) is a track tensioner piston retainer for the 760GT tracked chassis. It is a key positioning component of the track tensioning mechanism, working in conjunction with the 095-7124 slipper, 095-6848 inner retainer ring, and 095-6768/095-6769 bearing caps to lock the axial position of the tensioner piston and slipper. This prevents piston/slipper movement and detachment during operation, ensuring stable tension force transmission and precise sliding guidance. It is compatible with Cat® Parts for 760GT tracked chassis models such as the 395/374/349 excavators and 988/982 loaders.

Core Parameter Table

Item Details
Part Model CAT 095-7577 (0957577) Retainer (Piston Retainer, for 760GT track tensioning cylinder)

Type Piston axial positioning retainer, ring structure, inner ring with positioning step/claw, compatible with 760GT tensioning cylinder piston outer diameter

Material 65Mn spring steel / 42CrMo alloy steel, quenched + tempered, hardness HRC48-52, excellent elasticity and fatigue resistance, suitable for operating conditions from -40℃ to 120℃

Key Dimensions Inner diameter matches piston outer diameter (approx. 120-130mm), thickness approx. 12-15mm, positioning step height approx. 5-8mm, opening elastic deformation ≤2mm, radial clearance after installation ≤0.05mm

Compatible Models CAT 349, 352, 374, 395 excavators; 982, 988 Loader (760GT Tracked Chassis Configuration)

Functional Positioning: Locks the axial position of the piston and slipper, preventing movement and slippage during tensioning/buffering, ensuring sliding guide accuracy, and strengthening sealing and positioning with the inner retaining ring.

Adaptation and Application:
Installation Location: The connection end between the track tensioning cylinder piston and the 095-7124 slipper, embedded in the piston’s annular groove, and secured by elastic clamps/bolts. It cooperates with the 095-6848 inner retaining ring front and rear, doubly locking axial displacement, and simultaneously assisting in sealing the gap between the guide cylinder and the piston.

Application Scenarios: Heavy-duty, high-frequency impact conditions such as mining and infrastructure construction, bearing the axial impact force of the piston’s reciprocating motion, preventing piston/slipper displacement from causing tension fluctuations, track misalignment, or seal failure.

Core Functions: Axial positioning, anti-movement/anti-slippage, auxiliary sealing and guidance, ensuring the motion accuracy and structural safety of the tensioning cylinder piston-slipper assembly.

Installation and Maintenance Points

Installation: Clean the piston groove, retainer inner ring, and slipper positioning surface to remove oil, rust, and impurities.

Confirm the retainer’s elastic jaws/steps are intact. Use a special tool to embed the retainer into the piston groove, ensuring the jaws are fully engaged at the bottom of the groove without any looseness. If bolts are used, tighten them using 10.9 grade standard bolts with a torque of 25-35 N·m in a cross-tight manner.

After installation, check the fit between the retainer and the slipper to ensure there is no axial clearance and no jamming/abnormal noise when the piston is pushed or pulled.

Maintenance Cycle: Under standard operating conditions, check the retainer’s elasticity, deformation, and cracks every 1000 hours; for mining/crushing operations, shorten this to 500 hours.

Replacement Criteria: Replace the retainer if its elasticity fails (jaws deformed/broken), inner ring wear > 0.3mm, cracks appear, or the piston cannot be locked after installation. Use original parts first to avoid dimensional/elasticity deviations that could cause piston movement, slipper detachment, and track tension failure.