Engine cooling system is liquid, closed, with forced circulation of coolant
- Maintenance of bridges ZIL-131
- Gas distribution mechanism ZIL-131
- Wheel brake adjustment ZIL-131
- Adjustment of pivots and hubs ZIL-131
- Adjustment of gears of reducers ZIL-131
- The design of the steering ZIL-131
- Contactless ignition system ZIL-131
- Ignition system ZIL-131
- Coolant pump ZIL-131
- Safety valve for brakes ZIL-131
- Design and repair of the ZIL-131 power take-off
- Adjusting valve clearances ZIL-131
- Fuel pump B-10 ZIL-131
- Gearbox ZIL-131
- Steering gear adjustment ZIL-131