Advertisement
PART 16-1-
VENTILATING SYSTEM AND HEATER
16-5
TESTING
The
following tests may be made
on
the heater: Burned out fuses,
loose wire connections, defective
wires, collapsed hoses and air leaks
in
the body may be determined by
visual
inspection of the parts.
LOOSE MOTOR FAN TEST
Turn on the heater switch, and
listen for the sound of the motor. If
only a hum is heard, the fan is loose
on the motor shaft.
BLOWER SWITCH TEST
Substitute a known good blower
switch for the suspected switch.
PLUGGED HEATER CORE
TEST
Start the engine and temporarily
remove the outlet hose from the
heater core
(the
hose may be de-
tached from heater in engine com-
partment). Very little or no flow
of water from the core outlet
indi-
cates that the core
is
plugged. Make
certain the water
is
being
supplied
to the core inlet: i.e. the control
lever is
set
at HOT.
EJ
COMMON ADJUSTMENTS AND REPAIRS
VENTILATING SYSTEM
Bowden cable operated vents and
air inlets are adjusted so that the
vents
are tightly closed when the
control knobs
are
approx.
1 /16" from
being
pushed
all
the
way
in.
Loosen the Bowden cable retaining
screw at the vent control arm, move
the cable housing back and forth
until the vent is closed when the knob
is
-ft
to
k
inch from the in position,
then tighten the retaining screw.
BLOWER MOTOR
ELECTRICAL CIRCUIT
For the blower motor circuit
wiring diagram refer to figure 3.
HEATER HOSE ROUTING
Care must be taken when servicing
the hoses to insure a smooth kink
free installation for maximum heat-
ing.
HEATER HOSE
REPLACEMENT
To replace a heater hose, drain
the coolant, remove the hose, cut a
new hose to the same length as the
old hose, install the hose, and replace
the coolant. Make certain that the
heater hoses do not come in
contact with any part of the
exhaust system.
After the coolant has been replaced,
bleed the air from the heater core.
BLEEDING AIR FROM
HEATER CORE
Remove the hose at the outlet con-
nection of the heater core
(hose
that
leads to the water pump). Allow
any trapped air to flow out. When
a continuous flow of coolant is ob-
tained, connect the hose to the core.
16 AMP. FUSE
IGNITION
SWITCH
BROWN +WHITE
GREEN+ RED
~----------------------------------------~~
HEATER MOTOR
HEATER
SWITCH~-~
RED
YELLOW
FIG. 3-Heater Motor Circuit
HEATER SYSTEM
CONTROL ADJUSTMENTS
TEMPERATURE
To assure maximum temperature
the following temperature control
adjustments should be made.
1. Loosen the temperature control
cable retaining clip (at the heater end
of the cable).
2. Move the control lever
(upper)
hard left against the internal stop
(cold
position).
3. Move the lever to the right
-ft"
off the stop.
4. Fully close the temperature
control door.
5. Refit
the control cable
re-
taining
clip.
6. Check the leyer travel.
HEAT AND DEMIST
(Fig.
2)
1. Loosen the distribution control
cable retaining clip (at the heater end
of
the
cable).
2. Move the distribution control
lever
(lower)
hard left against the
internal
stop (off
position).
3. Move the lever to the right
-ft •
off the stop.
4. Hold the distribution
valve
crank
(right
hand
side
of distribution
box)
in the fully closed
position.
5. Refit
the control cable
re-
taining
clip.
6. Check the lever travel.
Advertisement
