GMC 1975 Motorhome Operating Manual page 99

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d . Change engine oil as shown on the rec-
ommended S .A.E. Viscosity Chart to aid cold
weather starting.
e. Park MotorHome as level as possible, end
for end and side to side .
f . Wash MotorHome . If exposed to road
salts, the exterior and underside should be thor-
oughly washed and flushed .
g . Remove all perishables and anything which
may freeze (canned goods, medicine, etc .) . Leave
the refrigerator door open. Be sure controls are
turned off.
h . To ventilate living area, open drawers, cab-
inets, closets, etc. If equipped with water purifier,
remove cartridge assembly to avoid possible
freezing.
i . Drain the holding tank, toilet and living
area water system as described earlier in this
section . Add antifreeze solution (5 gallons non-
toxic, non-flammable antifreeze and 5 gallons
water) to living area water tank. Open all faucets
and turn on water pump. When colored water
comes out of the faucets, close faucets . Flush
toilet. If equipped with recirculating toilet, charge
with antifreeze solution (1 1
/2
gallons non-toxic,
non-flammable
antifreeze
and
1 1
/ 2
gallons
water) . Be sure the water pump and water
heater are turned off.
j . Turn off LP gas tank valve.
k . Make sure furnace manual valve and ther-
mostat are set at "OFF," range/oven burners at
"OFF," oven at "PILOT OFF." If equipped with
gas/electric refrigerator be sure gas is turned
off at unit's control panel.
I . Add non-toxic, non-flammable antifreeze
(
1
/ 2
cup) to the kitchen, bathroom, and shower
drains .
m . Tape over drain openings (except toilet)
to prevent evaporation if storage is lengthy (6
months or more) .
n . Crack one window for ventilation, close all
others as well as roof vents.
For continuing satisfaction keep your vehicle all
GM . General Motors Parts are identified by one
of these trademarks:
GM
r1
V
Delco
93
o. Start and run engine weekly for approxi-
mately 20 minutes. If very low temperatures are
expected the batteries should be removed and
stored in a warmer area.
p. Check engine transmission and motor
generator (if equipped) for evidence of oil leaks.
q. Maintain tire pressure of 60 psi .
r. Remove accumulations of snow as often as
possible.
s. Turn off radio, exterior lights, and interior
lights .
t . 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 (see caution at beginning of
section on OPERATION OF LIVING AREA
FACILITIES) .
u. 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 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 vis-
cosity 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
wrapping 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
rustable parts with a light film of grease or oil .

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