Inspect fuel
pump for evidence of leakage around pump cover. Tighten the
screw securely if leakage is indicated. Inspect the rubber
coupling between the fuel pump and motor and replace the
coupling if it is worn or too soft.
b. Assembly
No attempt
should be made to repair the fuel pump beyond tightening of
the cover screws or replacement of damaged fuel fittings. If
the pump is defective, replace the entire unit. When removing
or replacing the coupling connectors on the fuel pump shaft
and motor shaft, remember that both shafts have left-hand
threads.
Check blower fan
for clearance and freedom of movement. Repair or replace parts
as required. When tightening nuts which attach the inner fan
housing to motor mounting bracket, try the fan on the motor
shaft and tighten nuts so that the rubber grommets will be
compressed evenly but not too tightly. Excessive tightening
will destroy the effectiveness of the grommets which are
designed to reduce noise in the blower.
33. HEATER ASSEMBLY (Figs. 14 and 16)
The heater
assembly consists of heater housing, heat exchanger, burner
assembly and the shield which surrounds the heat exchanger.
The housing of the Model 801 heater is constructed in two
plastic sections, one of which is permanently mounted on the
engine side of the dash panel. There will seldom be any reason
to remove this part of the housing since all operating parts
are attached to insulated cover.
a. Removal
Disconnect
combustion air hose and fuel line at burner blower assembly.
Disconnect two wires from terminal strip on outside of the
heater case. Remove exhaust tube clamp and disconnect heater
exhaust tube. Remove outlet adapter clamp at outlet of heater.
Remove four screws which attach cover of heater case to frame.
The cover can now be removed with all heater components
attached.
b. Removal
Disconnect the
white and black wires from two terminals of the solenoid fuel
valve and pull ignition cable off spark plug. Disconnect fuel
line from fitting on burner casting. The fuel line and
ignition cable should not be removed
