CAT 095-9870 SEAT SPRING

CAT 095-9870 (0959870) is a spring base for the track tensioning cylinder of the 760GT tracked chassis. It is a cup-shaped cast steel structure with a locating stop and mounting flange, compatible with models such as 349/352/374/395 excavators and 982/988 loaders. It is installed at the inner end of the tensioning cylinder cylinder, supporting the 095-9732 main compression spring, locating the 095-9772 spring seat, and working in conjunction with the 095-9852 retainer and the 095-9850 bearing cap to ensure stable axial load transmission and balanced track tension in the tensioning system.

Core Parameter Table

Item Details
Part Model CAT 095-9870 (0959870) Track Tensioning Cylinder Spring Base (760GT Track Chassis Dedicated)

Structure Type Cup-shaped with positioning stop + mounting flange + center guide hole, positioning 095-9772 spring seat, supporting 095-9732 main compression spring, distributing axial load

Material QT500-7 ductile iron, precision casting + surface hardening + anti-rust coating, tensile strength ≥500MPa, yield strength ≥320MPa, suitable for -40℃ to 150℃ working conditions

Key Dimensions Center guide hole inner diameter approx. 120-125mm (suitable for cylinder piston rod), positioning stop diameter approx. 180-185mm (suitable for 095-9772 spring seat), flange outer diameter approx. 220-225mm, thickness approx. 35-38mm, 8 bolt holes, hole diameter approximately 22-24mm. Compatible with CAT 349, 352, 374, 395 excavators; 982, 988 loaders (760GT tracked chassis configuration).

Functional Positioning: Supports the main compression spring, positions the spring seat, distributes axial load, prevents radial spring displacement, ensures stable tension transmission, and works with the retainer/bearing cover to protect the core components of the tensioning system.

Adaptation and Application:
Installation Location: Inside the track tensioning cylinder, at the inner end, fixed to the cylinder end face with flange bolts. The positioning stop fits against the 095-9772 spring seat. The center guide hole is fitted into the cylinder piston rod, supporting the 095-9732 main compression spring, transmitting tension to the spring and base, ensuring system stability.

Application Scenarios: Suitable for heavy-duty, high-frequency impact conditions such as mining stripping, rock crushing, and tunnel excavation. It withstands alternating loads and vibrations from the springs, preventing spring loosening/displacement that could lead to tension failure, and is suitable for high-intensity working environments.

Core Functions: Supports the main compression spring, positions the spring seat, distributes axial loads, prevents radial spring displacement, ensures stable track tension, and extends the service life of the springs and cylinders.

Installation and Maintenance Points:

Installation: Clean the base positioning stop, flange face, and cylinder end face. Apply sealant (Cat 5P-3931). Align the base positioning stop with the 095-9772 spring seat. Secure the flange to the cylinder with bolts, controlling the torque to 400-450 N·m, ensuring a tight fit without looseness.

Install the 095-9772 spring seat, 095-9732 spring, 095-9852 retainer, and 095-9850 bearing cap in sequence. Test that the tensioning cylinder extends and retracts smoothly without jamming, abnormal noise, or leakage.

Maintenance Cycle: Under standard operating conditions, check the tightness of the base flange bolts, wear of the positioning stop, and surface cracks every 2000 hours; for mining operating conditions, shorten this to 1000 hours, recording the fit clearance and deformation.

Replacement Criteria: Replacement is mandatory when the positioning stop wear is >1mm, surface cracks appear, the fit clearance with the spring seat/cylinder is >1mm, or the flange is deformed. Original parts are preferred to avoid spring positioning failure and tensioning malfunctions caused by material/dimensional deviations of non-original parts.