SEAT 8J7462 - Caterpillar

Sufficient Warmup Time
Generators should be warmed up before returning to full operation. Damage to valves and components during operation in cold temperature conditions can result from generator operation for short intervals. Damage to the generator can occur from starting the generator and stopping the generator many times without allowing the generator to reach normal operating temperature. The fuel and the oil are not completely burned in the combustion chambers while the generator is operating below the normal operating temperature. This fuel and oil causes soft carbon deposits on the valve stems. Generally, these deposits do not cause problems because these deposits are burned off during operation at normal generator temperatures. When the generator is started and the generator is stopped frequently, the generator may not reach the normal operating temperature. When the normal operating temperature is frequently not reached, carbon deposits will become thicker. Buildup of carbon deposits will prevent the free operation of the valves. This can also cause the following conditions: valves to stick, pushrods to bend, and other damage to valve train components. Operate the generator at no load until the coolant temperature is at a minimum temperature of 71° C (160° F). This will keep the carbon deposits on the valve stems at a minimum. This will also maintain free operation of the valves and the valve train components. The generator will remain in better condition and the service life of the generator may be extended when the generator is warmed up at no load. Lubrication will be improved, with less acid and sludge in the oil. Reduction of acid and sludge in the oil will allow for longer service life of the generator bearings, the pistol rings, and other parts. Limit unnecessary idle time to 10 minutes. Generator wear is greatest at low idle and unnecessary idling wastes fuel.The optional starting aid switch is used to inject ether into the generator for starting in cold weather conditions. Refer to for further information.