Westpro Westinghouse WH3250 Series, Service Manual, Page: 31 / 64

7-1
MAINTENANCE
MAINTENANCE
Before performing maintenance
on the generator, review
Safety on
page 1-1 and the following safety
messages.
!
WARNING
!
Avoid accidentally starting the
generator during maintenance by
removing the spark plug boot from
the spark plug. For electric start
generators, also disconnect the battery
wires from the battery (disconnect the
black negative (-) wire fi rst) and place
the wires away from the battery posts
to avoid arcing.
Allow hot components to cool to
the touch prior to performing any
maintenance procedure.
Internal pressure can build in the
engine crankcase while the engine
is running. Removing the oil fi ll plug/
dipstick while the engine is hot can
cause extremely hot oil to spray out
of the crankcase and can severely
burn skin. Allow engine oil to cool for
several minutes before removing the oil
fi ll plug/dipstick.
Always perform maintenance in a well-
ventilated area. Gasoline fuel and fuel
vapors are extremely fl ammable and
can ignite under certain conditions.
Table 7-1: Maintenance Schedule
Maintenance Item
Before Every
Use
After First 20
Hours or First
Month of Use
After 50 Hours
of Use or Every
3 Months
After 100 Hours
of Use or Every
6 Months
After 300
Hours of Use
or Every Year
Engine Oil Check Level Change Change – –
Cooling Features Check/Clean – – – –
Air Filter Check – Clean 1 – Replace
Spark Plug – – – Check/Clean Replace
Spark Arrestor – – – Check/Clean –
Fuel Sediment Bowl – – – – Clean
Cylinder Cooling Fins – – – – Clean
Valve Lash – – – – Check/Adjust
Fuel Line – – – – Check/Replace
Idle Speed – – – – Check/Adjust
1 Service more frequently if operating in dry and dusty conditions.
!
CAUTION
Avoid skin contact with engine oil or
gasoline. Prolonged skin contact with
engine oil or gasoline can be harmful.
Frequent and prolonged contact with
engine oil may cause skin cancer.
Take protective measures and wear
protective clothing and equipment.
Wash all exposed skin with soap and
water.
Maintenance Schedule
!
WARNING
!
Failure to perform periodic
maintenance or failure to follow
maintenance procedures can cause
the generator to malfunction and could
result in death or serious injury.
NOTICE
Periodic maintenance intervals vary depending
on generator operating conditions. Operating the
generator under severe conditions, such as sustained
high-load, high-temperature, or unusually wet or
dusty environments, will require more frequent
periodic maintenance. The intervals listed in the
maintenance schedule should be treated only as a
general guideline.
Following the maintenance schedule is important
to keep the generator in good operating condition.
The following is a summary of maintenance items by
periodic maintenance intervals.