3-6 Scheduled Maintenance
TP-5631 7/96
Generator Service
Have an authorized service distributor/dealer perform
all generator set service. Under normal conditions,
regular generator service is not required. For operation
under dusty and dirty conditions, use dry compressed
air to blow dust out of the generator. Do this with the
generator set operating and direct the stream of air in
through the cooling slots at the end of the generator.
Replace the end bracket bearing every 10,000 hours of
operation in standby and prime power applications.
Service more frequently if bearing inspection indicates
excessive rotor end play or bearing damage from
corrosion or heat build-up. The end bracket bearing is
sealed and requires no additional lubrication.
Storage Procedure
Perform the following steps if the generator set is out of
service for three months or longer.
Engine oil
1. Operate generator set for 5 minutes.
2. Stop the generator set.
3. While the engine is still warm, drain the engine
lubrication oil from the crankcase.
4. Refill the engine crankcase with an oil having a
viscosity appropriate for the particular climate.
5. Run the generator set for a few minutes to
distribute the clean oil.
6. Stop the generator set.
Fuel (gasoline-fueled engines)
1. To remove fuel.
a. Drain the fuel from the fuel tank.
b. Drain the carburetor bowl (or run generator set
until empty). This prevents the gasoline from
becoming stale.
2. To stabilize fuel.
a. Use a gas stabilizer for gasoline-fueled
generator sets in lieu of draining the carburetor
bowl. Add fuel stabilizer to the fuel according to
the manufacturer’s instructions.
Fuel (gaseous-fueled engines)
1. With the generator set running, shut off the gas
supply.
2. Run generator set until the engine stops from lack
of fuel.
Coolant (liquid-cooled models only)
1. Check engine coolant protection.
Lubricate Cylinders
1. Remove the spark plugs.
2. Pour approximately one tablespoon of engine oil
into each spark plug hole.
3. Crank the engine two or three revolutions to
lubricate the cylinders.
4. Reinstall spark plugs.
Exterior Preparation
1. Clean exterior surface of generator set.
2. Seal all openings in the engine with non-absorbent
adhesive tape.
3. Mask off all areas to be used for electrical contact.
4. Spread a light film of oil over unpainted metallic
surfaces to prevent rust and corrosion.
