Winterization; Vehicle Storage - GMC 1977 motorhome Operating Manual

1977 motorhome gmc
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5 . To remove any excessive chlorine taste or
odor which might remain, prepare a solution
with one quart of vinegar to five gallons of water
and allow this solution to agitate in tank for
several days by vehicle motion.
6. Drain tank and again flush with potable
water.
WINTERIZATION
When traveling in winter it is recommended
that the water tank not be filled until the desti-
nation is reached . This will ensure that the ve-
hicle has thoroughly warmed up . The water and
holding tank systems should be drained before
leaving for home. Also, an approved plastic pipe
non-toxic, non-flammable antifreeze should be
put in the sink and shower traps. If equipped
with a recirculating toilet the standard winteri-
zation is to replace one-half of the charge water
with an approved non-toxic, non-flammable
antifreeze. This antifreeze added to the holding
tank will help keep the tank contents from
freezing.
See "Vehicle Storage" for additional infor-
mation.
VEHICLE STORAGE
Your Motorhome may be stored for consid-
erable lengths of time provided the following
steps are performed :
1 .
SHORT TERM STORAGE-UP TO 60
DAYS AND ABOVE 32°F . (0°C.)
a. Fill fuel tanks to reduce excessive build-up
of moisture in the fuel tanks.
b . Park Motorhome as level as possible, end
for end and side to side.
c. Wash Motorhome. If exposed to road salts
the exterior and underside should be thoroughly
washed and flushed.
d. Remove all perishables, leave refrigerator
door open. Be sure controls are turned off .
e. Ventilate the living area, drawers, cabinets,
closets, etc .
f. Drain the holding tank, toilet and living
area water system as described earlier in this
section. Be sure the water pump and water heater
are turned off .
109
g. Turn off LP gas at tank valve .
h . 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. Plug or tape all drains to retard evapora-
tion of residual moisture in drain traps.
j. Tape over vents to prevent insects from
entering. Be sure to remove tape before operat-
ing LP gas appliances, to help avoid poisoning
by carbon monoxide (see caution at beginning of
section on OPERATION OF LIVING AREA
FACILITIES) .
k. Check Motorhome weekly to ensure that
undesirable conditions are not forming (water
seepage, mold, odors, etc .) . Household air de-
odorizers or disinfectants in aerosol cans may be
used as required, however, do not spray directly
on any surface.
I . Maintain proper tire pressure.
m . Crack one window for ventilation, close
all others as well as roof vents .
n . Check batteries (main and auxiliary) for
charge . Specific Gravity reading of 1 .255 is re-
quired to prevent deterioration . Add colorless,
odorless drinking water if necessary.
o . Turn off radio, exterior lights, and interior
lights .
p. If Motorhome is to be moved, run engine
at least two minutes with the transmission se-
lector in "PARK ."
q. Start and run engine for approximately 15
minutes weekly. Check engine, transmission and
motor generator oil levels. Dipsticks should al-
ways be properly seated on tubes to prevent
moisture from entering.
2 .
LONG TERM STORAGE - 60 DAYS
OR MORE AND ABOVE 32°F . (0°C.)
a . Perform all of the above steps except
Step q .
b . Motorhomes with automotive air condi-
tioning : run engine approximately 15 minutes
with automotive air conditioning controls turned
to "ON" position . Perform this operation every
30 days.

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