Changing The Engine Oil And Filter; Oil Drain Location; Oil Change Procedure; Removal Of Oil Filter - Generac Power Systems GTH760 Service Manual

SeCTIoN 8: lubrICATIoN SYSTeM

CHANGING THe eNGINe oIl ANd FIlTer

RECOMMENDED OIL TYPE:
Using the proper type and weight of oil in the crankcase is
extremely important. Check the oil before each use and change
the oil regularly (see Figures 1-1 through 1-5). Failure to use
the correct oil, or using dirty oil, can cause premature engine
wear and failure.
Use only high quality detergent oil rated with an API service
classification SJ or higher (example: SL or SM). Do NOT use oil
designated "for diesel engines only" (example: CD).
The recommended oil weights include the following:
• During summer months: SAE 30. An acceptable substi-
tute is SAE 10W-30. After first oil change, synthetic oil is
acceptable.
• During winter months: SAE 5W-30 or synthetic 5W-30. DO
NOT USE SAE 10W-40. After first oil change, synthetic oil
is acceptable.
*
Any attempt to crank or start the engine before it
has been properly serviced with the recommended
oil may result in an engine failure.

OIL CHANGE PROCEDURE:

See "Section 14: Specifications" for crankcase oil capacities.
Use no special additives. Make sure that the unit is level when
filling with oil. DO NOT OVERFILL.
The engine is equipped with an oil filter. Change the oil and
filter after the first eight (8) hours of operation. Change the
oil and oil filter every 100 hours thereafter. If you are using
this engine under dirty or dusty conditions, or in extremely hot
weather, change the oil more often.
Use the following instructions to change the oil while the
engine is still warm:
1. Clean the area around the oil drain plug, remove the plug
and drain the oil completely into a suitable container
(Figure 8-3).
Figure 8-3. Oil Drain Location
Figure 8-4. Removal of Oil Filter
2. When the oil is drained, install and tighten the oil
drain plug.
3. When changing the oil filter, use the following
instructions:
a. Locate oil filter (Figure 8-4).
b. Place a suitable container beneath the oil filter and
turn the filter counterclockwise to remove the filter.
c. Coat the gasket of a new filter with engine oil. Turn
the new filter clockwise until the gasket contacts the
filter adapter, then tighten an additional 3/4 turn.
4. Remove the oil fill cap and insert a clean funnel into the
oil fill opening. Fill the crankcase with the recommended
oil until the oil level is at the full point on the dipstick.
5. When the crankcase is filled to the proper level, install
the oil fill cap. Start engine to fill oil filter, recheck/correct
oil level.
8-2
DRAIN
ROTATE
OIL FILTER
COUNTER-
CLOCKWISE
TO LOOSEN