20KW Generator Maintenance Schedule with “Build 84” Lister-Petter Engine (in normal environments)


Change Oil and Fuel Filters after first 100 hours of operation then at the following intervals:

Engine Oil (requires about 5.8 quarts)
Engine Oil Filter (service box at fuel filler)
Fuel Filter (service box at fuel filler)
Air Filter Element (under dog house)
Grease 2 Jack Shaft Bearings (under dog house)
Air Filter Elements (2)
Hydraulic System Filter
Clean Radiator Externally

200 hours
200 hours
400 hours
800 hours
800 hours
800 hours
800 hours
1600 hours or 24 months

Normal environments refer to operation of the generator in normal conditions. Air quality, fuel quality, temperature and load all affect service frequency. Airborne containments will affect the air filter and radiator service requirements. Poor fuel, either from the source or due to storage, will affect the fuel filters. Load, either excessive or minimal, will affect the lube oil requirements. Inspection and testing are extremely important. If you have a question about performance, test unit with a load-bank.

Resetting time to service clock on LitePOWER Generators, 20kw to 200kw, with the single phase/three phase switch. Turn POWER ON and hold the RTM switch in the up position until the information has scrolled through it’s third repeat. This will reset the TIME TO SERVICE clock to 200 HOURS.

If the generator is equipped with a 480-volt position on the phase switch the instructions are the same with this exception; the AUTO/OFF/RUN switch must be in the AUTO position.


Engine Oil
Engine Oil Filter
Fuel Filter
Air Filter Element
Belt, Accessories
Belt, Blower Drive

Delo 15W40 or Rotella T 15W40
Lister-Petter 328-21600 – Wix 51521
Lister-Petter 751-18100 – Wix 33107
Nelson 70206N or 70757H
Dayco Polycog 5040560, NAPA 25040560, Gates K04056
Graingers 1A100 43″ V Belt

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