30
MAINTENANCE
ENgiNE OiL MAiNTENANCE
Engine Oil Specification
Use premium quality 4-stroke engine oil with an API
Service Classification of at least SG. A SAE multigrade
viscosity of 5W-30 or 10W-30 is suitable for use in
ambient temperatures of up to 40°C. For temperatures
above 40°C, a multigrade viscosity of 10W-40 or 15W-
40 is recommended.
NEVER use 2-stroke engine oil either directly in the
engine or mixed with the fuel.
Mineral based, semi-synthetic or fully synthetic oils
may be used, but different types of oils should not
be mixed together. The engine oil supplied originally
with the generator is a mineral type with SAE 10W-30
viscosity.
Checking Engine Oil
NOTICE
Always maintain proper engine oil level. Failure to
maintain proper engine oil level can result in severe
damage to the engine and/or shorten the life of the
engine.
Always use the specified engine oil. Failure to use
the specified engine oil can cause accelerated wear
and/or shorten the life of the engine.
Engine oil level should be checked before every use.
1. Always operate or maintain the generator on a flat
surface.
2. Stop engine if running.
3. Let engine sit and cool for several minutes (allow
crankcase pressure to equalize).
4. With a damp rag, clean around the oil fill plug/
dipstick.
5. Remove oil fill plug/dipstick by unscrewing it anti-
clockwise (see Figure 26).
6. Check oil level:
When checking the engine oil, remove the oil fill
plug/dipstick and wipe it clean. Then re-insert
the oil fill plug/dipstick without screwing it into the
oil filler neck, remove it and check the oil level
indicated.
•
Acceptable Oil Level – Oil is visible on the
crosshatches between the H and L lines on the
oil fill plug/dipstick (see Figure 27).
•
Low Oil Level – Oil is below the L line on the oil
fill plug/dipstick.
Figure 26 – Oil Fill Plug/Dipstick
Figure 27 – Checking Oil Level
H
L
Table 2: Advanced Maintenance Schedule - Authorized Westinghouse Service Dealer Performed
Maintenance
Item
before Every
Use
After First 20
Hours or First
Month *
After 50 Hours
or Every 3
Months *
After 100 Hours
or Every 6
Months *
After 300 Hours
or Every Year *
Valve Clearance
–
–
–
–
Check/Adjust
Idle Speed
–
–
–
–
Check/Adjust
* Whichever occurs first.
Table 2 lists the more complicated maintenance tasks that are best performed by a qualified mechanic using
specialized tools. It is recommended to engage an authorized Westinghouse service dealer to carry out this work.
Summary of Contents for WHXC3750
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