GMC 1977 motorhome User Manual

the LP gas itself, periodically have methyl
al-
cohol added to your tank by a LPG dealer
. Al-
ways have methyl alcohol added to tank for
winter operation, to help prevent moisture from
freezing in the LP gas lines or at the pressure
regulator
.
When you are not using the gas
appliances,
shut off the control valve on the tank
.
You may find that in the southern part of
the
country only Butane is available for your LPG
tank . It will work fine except that at tempera-
tures below 30'F . (-1'C .) . Butane is in
a
liquid state . In this temperature range no vapor
is produced to fuel the appliances . If you expect
to encounter temperatures below 30°F .
(-VC .),
discharge
the
Butane from the tank
and refill
the
tank with
propane gas . Propane
gas does not vaporize below a temperature
of
-44°F . (-42°C .) .
When opening the manual control valve to
operate the system, open it all the way,then close
it one-quarter turn . This will enable you to tell if
the valve is open or closed .
CAUTION
BfORE opening the ?control valve chec
thgt-cvntrols for oll gas appliances - ate ut
-the OFF posiffiim .-l4 this
is
not done, LP
gas could
accumulate-inside-the
vemde .
creating-a fire
or
explaston hazard .
DO
NOT alter LPG tank
in
anyway . The
regulator on the -tank is pre-set-DO NOT
attempt to adjust it . This should fee do
by an authorized service outlet .
It is recommended that you travel with -
your . LPG - system off . All pilots and burn-
ers should lie - turner! - off and the control
valve
on- the
LPG tank should be off . This
should
also be done -whenever- the vehicle
will not be in use . This reduces the .hatard
of
leaking gas .
LIVING AREA ELECTRICAL SYSTEM
Both the 12-volt DC and 120-volt AC circuits
in the Motorhome living area are designed to be
protected by a series of fuses and circuit breakers .
The 12-volt living area circuits are protected by
automotive-type fuses, and the 120-volt circuits
are protected by circuit breakers like those found
in modern
homes .
95
Living Area Electrical Compartment
(ZEO 6581)
The 12-volt living area fuse block in Model
ZEO 6581 is located in the electrical compart-
ment, next to the hall closet, along with power
converter and main circuit breaker panel . In
Model ZEO
6584,
the fuse block is located in
the bathroom vanity beneath the sink . In the
event of an overloaded circuit, the cause should
be corrected and a new fuse of the same capacity
installed . For explanation of 12-volt
fuse
block
number code, refer
to
GENERAL
DATA SPECIFI-
CATIONS
later in this manual .
The main circuit breaker panel contains
circuit breakers that are designed to snap to the
"OFF" position in the event of an overloaded
120-volt circuit . Once the cause of the overload
is corrected the circuit breaker switch may be
moved back to the "ON" position . The circuit
breaker panel in Model ZEO 6581 is located in
Living AreaFuse Panel (ZEO 6584)

GMC 1977 motorhome Specifications

General

Manufacturer	GMC
Model Year	1977
Transmission	3-speed automatic
Fuel Type	Gasoline
Drive Type	Front-wheel drive
Wheelbase	140 inches
Width	96 inches
Height	108 inches
Engine	455 cu in (7.5 L) V8
Length	23 ft (7.0 m)
Weight	10, 500 lbs
Fuel Capacity	25 gallons
Sleeping Capacity	4 to 6 people