Description
CAT 077-7622 SEAT
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The CAT 077-7622 is a Caterpillar original equipment manufacturer (OEM) Mechanical Suspension Operator Seat, compatible with various CAT loaders, graders, and other construction machinery. It uses mechanical springs for basic vibration damping and multi-directional adjustment, adapting to low-to-medium vibration operating conditions. It is a core Cat® Parts component ensuring operator comfort.
Core Parameters (Original Manufacturer Nominal)
Item Details
Part Model: CAT 077-7622 (0777622) Mechanical Suspension Seat
Material: Base is made of stamped carbon steel, frame is made of Q235 steel, surface is powder coated; seat surface is made of oil-resistant and wear-resistant PVC material, filled with high-resilience cold-foam sponge, anti-aging ≥5 years
Key Dimensions: Seat width 460mm, total height 980mm, front and rear adjustment travel 150mm, seat depth 480mm, base mounting hole spacing 350×250mm, compatible with standard mounting rails
Compatible Objects: Compatible with CAT 938G, 950G/H loaders, 120G, 140G graders, etc.; matching safety belt 222-0345, rail 421-1223
Features: Mechanical spring shock absorption, vertical travel 50mm, load capacity 60-120kg, backrest angle 0-110° Adjustable with simple lumbar support, suitable for continuous work conditions.
Electrical Configuration: No heating/ventilation (basic model), optional 24V heating pad (528-7420 wiring harness sold separately).
Weight: Approx. 18kg (39.7lbs).
Suitable Applications:
Basic Shock Absorption Support: Filters vibrations and impacts during driving and operation through mechanical spring suspension, alleviating operator lumbar and spinal fatigue. Suitable for Caterpillars operating under moderate vibration conditions such as loaders and graders.
Work Conditions: Suitable for low-to-medium intensity work scenarios such as municipal construction and road maintenance. Maintains basic comfort even after more than 8 hours of continuous operation. Maintenance costs are lower than Caterpillar air suspension seats.
Compatibility: Compatible with 222-0345 two-point safety belt and 421-1223 seat rail; precise alignment with the base mounting holes is required during installation to ensure a secure and stable seat.
Installation and Maintenance Points
Installation Steps:
1. Clean the mounting surface of the cab seat base. Secure the seat rail to the base and tighten the bolts to a torque of 40-45 N·m.
2. Install the seat body onto the rail, connect the locking mechanism, and test the fore-and-aft sliding and locking functions to ensure they are normal.
3. Install the seat belt and check that the backrest angle adjustment and lumbar support adjustment are smooth and without jamming.
Maintenance Cycle: Check every 1500 hours under standard operating conditions, focusing on spring elasticity, rail wear, and locking mechanism reliability. For harsh operating conditions (high dust, high vibration), shorten the interval to 1000 hours.
Replacement Standard: If the seat surface is damaged and leaking foam, the spring is broken/fatigued, the rail locking mechanism fails, or the frame is deformed, the entire seat must be replaced; it cannot be repaired.
