CAT 096-3158 SEAT

The CAT 096-3158 (0963158) is a mechanically suspended, center-back operator seat assembly suitable for medium-sized excavators/loaders, including the 320/330 series excavators and the 963 tracked loader. It focuses on vibration isolation and basic adjustment for lightweight, heavy-duty applications, includes a three-point seatbelt, and is positioned as a cost-effective and durable Cat® Parts driver’s seat solution.

Core Parameter Table (Original Manufacturer Nominal)

Item Details
Part Model CAT 096-3158 (0963158) Mechanical Suspension Mid-Back Operator Seat Assembly (including seat belt and slide rails)

Structure Type Mid-back mechanical spring suspension seat, including front and rear slide rails, height/backrest adjustment mechanism, three-point automatic retractable seat belt, black wear-resistant vinyl fabric, metal stamped base + spring assembly

Material Seat cushion/backrest is high-elasticity cold-foamed polyurethane; fabric is UV-resistant vinyl; frame is Q235 carbon steel + electrophoretic coating; springs are 65Mn silicon manganese steel, surface powder coated

Key Dimensions Seat width 450mm, total height 980mm, seat depth 460mm, seat height 410-470mm (adjustable); front and rear slide rail travel 180mm, backrest angle 90°-120° adjustable

Adjustment Function Forward/backward sliding (180mm), height adjustment (60mm), backrest angle (90°-120°), lumbar support (3 levels), weight adaptability (50-140kg)

Suspension and Safety: Mechanical spring suspension travel 45mm, vertical damping coefficient 0.7, suitable for medium-to-high frequency vibration conditions; three-point safety belt (length adjustable, locking response ≤0.1s)

Compatible Models: CAT 320, 330 series excavators; 963 tracked loaders; some small articulated trucks (compatibility needs to be confirmed by verifying the equipment serial number SN)

Single Set Weight: Approximately 32kg (including base, slide rail, and safety belt)

Installation and Application Scenarios: Installation Positioning: Standard four-point mounting holes on the cab floor, with special bolts and anti-loosening nuts, compatible with mechanical suspension base. After installation, testing showed smooth slide rail movement and normal safety belt locking.

Operating Conditions: Suitable for medium-to-high frequency vibration conditions in infrastructure and municipal engineering. The mechanical spring suspension structure isolates track travel from operational impacts, and the mid-backrest design accommodates moderate driving durations.

Matching Components: Compatible with seat rails, seat belt assemblies, and seat mounting bases. During replacement, simultaneously check rail wear, spring elasticity, and seat belt locking function.

Installation and Maintenance Points:
Installation Steps: Clean the cab floor mounting surface, align the four mounting holes, and tighten with 8.8 grade M12 bolts to a torque of 60-70 N·m. Test the rail sliding and seat belt locking for proper function.

Adjust the spring preload according to the operator’s weight, ensuring the seat suspension travel is in the middle position. Adjust the backrest angle to approximately 105°, ensuring the lumbar support fits snugly against the back.

Maintenance Cycle: Check every 1000 hours under standard operating conditions; shorten to 500 hours for mining conditions. Focus on checking rail lubrication, spring elasticity, seat belt locking performance, and fabric wear.

Replacement criteria: If the spring is broken/deformed, the slide rail is stuck, the seat belt locking mechanism is ineffective, the fabric is damaged and leaking, or the adjustment mechanism is malfunctioning, the entire unit must be replaced. If it cannot be repaired, it can continue to be used.