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 TM 55-1905-223-24-3
f.
Remove machine bolts (17) and rim clenching clamps (16) and remove bent metallic tube (14) with
nonmetallic hose (13) and clamps (18).
g. Remove preformed packing (15). Discard packing.
h. Remove four assembled washer screws (20) and remove housing (12) wih gasket (11), thermostat seal
t
(10), and flow control thermostat (9) from thermostat support.
i.
Tag and disconnect electrical wiring from engine temperature switch (3) and remove engine
temperature switch (3) from thermostat support (4).
j.
Remove two hexagon cap screws (6), lockwashers (5) and two machine screws (7) from thermostat
support (4).
k.
Remove thermostat support (4) and gasket (8). Discard gasket.
REPAIR
Repair of the thermostat housing group consists of replacing gaskets (8, 2, and 21), preformed packing
1
(15), thermostat seal (10), flow control thermostat (9), and nonmetallic hose (13).
a. Remove gasket (11) from housing (12). Discard gasket.
b. Remove flow control thermostat (9) from housing (12).
c.
Check thermostat seal (10) for cracks or corrosion. Replace if cracked or corroded.
CAUTION
When removing thermostat seal (10), be careful not to sear
housing (12).
(1) Using a punch and hammer, remove thermostat seal (10) from housing (12).
(2) Using solvent, clean housing and check for cracks, pitting or corrosion. Replace if cracked, pitted,
or corroded.
CAUTION
When installing new thermostat seal (10), the flat side of the
seal must be toward the mandrel for correct installation, so as
not to cause damage to the engine.
d
Using thermostat seal mandrel and hammer, install new thermostat seal (10) in housing (12).
e. Using solvent, clean thermostat support (4).
(1) Check thermostat support (4) for cracks or pitting.
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