GMC 1976 ZEO 6083 Maintenance Manual page 664

24A- 4 PERIODIC MAINTENANCE AND LUBRICATION
p . Start and run engine weekly for approximately
20 minutes. If very low temperatures are expected
the batteries should be removed and stored in a
warmer area .
q. Check engine transmission and motor genera-
tor (if equipped) for evidence of oil leaks.
r. Maintain tire pressure of 60 psi .
s. Remove accumulations of snow as often as
possible .
t. Turn off radio, exterior lights, and interior
lights .
u. Tape over vents to prevent possible entry of
snow . Be sure to remove tape before operating LP
gas appliances, to help avoid poisoning by carbon
monoxide .
v. Before moving, run engine at least two minutes
with the transmission selector in "PARK" position .
ONAN MOTOR GENERATOR STORAGE
If the motor generator will be out of service for
ONAN MOTOR GENERATOR
SERVICE INTERVALS
For service intervals refer to the Maintenance
Chart provided earlier in this section.
CHECKING OIL LEVEL
Check the oil level daily, or at least every eight
hours of operating time. Check more often on a new
unit as oil consumption is generally higher until pis
ton rings seat properly . Do not check oil level while
unit is operating.
CHANGING OIL
Initial oil change should be made after the first
25 hours of operation; change every 50 to 100 hours
after that . If operating in extremely dusty or cold
weather conditions, change oil more frequently .
The 4KW Model has an oil capacity of 3 quarts,
3 1/2 quarts if replacing oil filter .
The 6KW Model has an oil capacity of 4 quarts;
4 1/2 quarts if replacing oil filter .
Do not mix brands or grades of motor oil. Use a
LUBRICATION
more than 30 days, the following steps should be
taken to protect the unit .
1 . Run the unit until thoroughly warm .
2. Disconnect fuel supply and run until unit
stops.
3. Drain oil from crankcase while still warm .
Refill and attach a warning tag stating oil viscosity
used .
4. Remove each spark plug . Pour one ounce of
rust inhibitor (or S.A .E . 50 oil) into each cylinder .
Crank engine several times. Install spark plugs .
5 . Service air cleaner.
6 . Clean governor linkage and protect by wrap-
ping with a clean cloth.
7. Plug exhaust outlet to prevent entrance of
moisture, dirt, bugs, etc.
8. Wipe entire unit with a clean cloth. Coat rusta-
ble parts with a light film of grease or oil .
good quality oil with the designation SE/CC . If
necessary to add oil between changes, use the same
brand and grade of oil.
Use the following chart as a guide for the proper
oil according to temperature ranges :
Temperature
Above 30T. (-1 .1°C .)
(-17 .8°C .) 0°F. to
30T. (-1 .1°C .)
Below 0°F.
(-17 .8°C .)
Recommended Oil
SAE 30
SAE 5W30 or 10W40
SAE 5W30
NOTE : Fill engine with oil through dipstick
tube .
The oil drain plug is located on the bottom side
of the engine oil pan. Unit must be pulled out on its
slide rail to gain access .
OIL FILTER (FIGURE 2)
Change the crankcase oil filter at least every 200
hours. The filter is located on the right side of the
unit (facing the compartment) . Remove filter by