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MODEL 182 & T182 SERIES SERVICE MANUAL
14-1.
UTILITY SYSTEMS.
muffler.
In most cases, valves or controls can be
freed by proper lubrication. Damaged or broken
14-2.
HEATING SYSTEM.
(See figure 14-1.)
parts must be repaired or replaced.
When checking
controls, ensure valves respond freely to control
14-3.
DESCRIPTION.
The heating system is com-
movement. that they move in the correct direction.
prised of the heat exchange section of the exhaust
that they move through their full range of travel and
muffler, a shut-off valve, mounted on the right for-
seal properly.
Check that hose are properly secured
ward side of the firewall, a push-pull control on the
and replace hose that are burned, frayed or crush-
instrument panel, outlets and flexible ducting con-
ed.
If fumes are detected in the cabin, a thorough
necting the system,
inspection of the exhaust system should be accom-
plished. Refer to applicable paragraph in Section 11
14-4. OPERATION.
Ram air is ducted through
for this inspection.
Since any holes or cracks may
engine baffle inlets and heat exchange section of the
permit exhaust umes to enter thecabin, replacement
exhaust muffler, to the shut-off valve at the firewall.
of defective parts is imperative because fumes consti-
The heated air flows from the shut-off valve into a
tute an extreme danger.
Seal any gaps in heater
ducts across the firewall with Pro-Seal =700 (Coast
duct across the aft side of the firewall, where it is
Pro-Seal Co.,
Los Angeles. California) compound
distributed into the cabin. The shut-off valve, oper-
or
equivalent compound.
ated by a push-pull control labeled "CABIN HEAT.
located on the instrument panel, regulates the vol-
14-6.
REMOVAL, INSTALLATION AND REPAIR.
ume of heated air entering the system. Pulling the
Figure 14-1 may be used as a guide during removal,
control full out supplies maximum flow and pushing
installation and repair of heating system components.
control in gradually decreases flow, shutting off flow
Burned, frayed or crushed hose must be replaced
completely when the control is pushed full in.
with new hose, cut to length and installed in the orig-
inal routing. Trim hose winding shorter than the
14-5. TROUBLE SHOOTING.
Most of the operation-
hose to allow clamps to be fitted. Defective air
al troubles in the heating and defrosting systems are
valves must be repaired or replaced. Check for
caused by sticking or binding valves and their con-
proper operation of valves and their controls after
trols, damaged air ducting or defects in the exhaust
repair or replacement.
14-2
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Table of Contents
Troubleshooting
