Motor Generator - GMC 1977 motorhome Operating Manual

Onan Motor Generator
HOLDING TANK-This is designed to in-
dicate content level in the holding tank.
Never allow this gauge to reach the "FULL"
mark. If the holding tank is overfilled the
overflow will back up through the bathroom
shower drain.
These gauges are activated by a "ROCKER"
switch located on the face of the panel . This
switch has three positions ; "ON," "OFF," and
"MOMENTARY ON." An indicator light glows
when gauges are operating.
MOTOR GENERATOR
IMPORTANT : Before operating motor generator
see the carbon monoxide caution at the begin-
ning of this section .
The motor generator will allow operation of
all 120-volt appliances without an external
power connection, thus allowing the vehicle to
be independent of an external power source. The
motor generator is located in an exterior com-
partment in the left rear corner of the vehicle.
The Onan unit is mounted on slides and can
be pulled out like a drawer for ease in servicing
the unit. To slide out the unit depress the but-
tons on the two latches . Then pull up on safety
latch in upper right-hand corner and pull unit
out.
OPERATING INSTRUCTIONS
The unit can be started from inside the
Motorhome by using the remote switch . The
3 6
Onan remote switch is located at eye level on
the side of the refrigerator. A START-STOP
switch is also located on the right side of the
generator .
Before starting the motor generator the ex-
ternal power cord must be plugged into the
motor generator receptacle. Both of these com-
ponents are located in the external utilities com-
partment on the left side of the vehicle. Be sure
the crankcase has been filled with oil to the "F"
full mark on the dipstick. Check oil only when
the motor generator is not operating.
The remote START-STOP switch is a three-
position rocker switch . By pressing the top half
of the switch the starter on the motor generator
will be activated, hold in the switch until the
unit is started. The switch should then be re-
leased . When the motor generator is running the
small amber light next to the switch will be lit .
To stop the unit depress the bottom half of the
switch, and hold in until the unit comes to a
full stop. The START-STOP switch on the unit
itself operates in a similar manner.
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IMPORTANT : If the motor generator has been
running with a load connected, disconnect the
load and allow it to run for a few minutes (with
no-load connected) before pushing STOP button.
The circuit breaker on top of the unit will trip
when the demand for electricity in amperes ex-
ceeds the motor generators capabilities. If the
circuit breaker does trip, remove part of the
electrical load and reset the breaker.
HOUR METER
Located to the left of the START-STOP
.switch is the HOUR METER. The HOUR-
METER indicates total amount of hours motor
generator has operated . This gauge will aid in
determining when the motor generator should
receive periodic inspections, maintenance and
service parts replacements in conjunction with
the Maintenance Schedule folder. The Mainte-
nance Schedule folder includes Onan Motor
Generator Maintenance .