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TM 9-2320-270-20-3
HEATER COOLANT RETURN ELBOW - CONTINUED
ACTION
REMARKS
ITEM
LOCATION
REMOVAL
WARNING
Be careful when removing radiator cap. If engine is hot, escaping steam could burn
you. Using a rag, cover radiator cap to protect your hand. Unscrew cap just enough to
allow any built-up steam to escape. When all pressure has been relieved, unscrew cap
the rest of the way, and take off of radiator.
Slowly unscrew to first stop, pause,
am
Radiator cap (2)
1. Radiator(1)
and let pressure escape.
When all pressure has escaped,
b.
unscrew and take off.
a.  Put drain pan underneath.
Draincock (3)
2.
b.  Open and let coolant drain.
c.  When coolant stops draining close.
d.  Get rid of coolant (page 4-1).
Put drain pan underneath.
a.
Clamp (6)
3. Hose (4) to
Using screwdriver, unscrew and slide
b.
elbow (5)
down.
NOTE
it maybe necessary to cut off hose with pocket knife. if hose has to be cut, replace
hose.
a. Twist and pull off.
Hose (4)
4. Elbow (5)
b. Get rid of coolant (page 4-1).
Using 11/8-inch and 11/16-inch
Elbow (5)
5. Reducer(7)
wrenches, unscrew and take out.
Using 11/8-inch wrench, unscrew and take
Reducer (7)
6. Thermostat
out.
housing (8)
CLEANING
Clean according to general maintenance
All parts
7.
instructions (page 4-1).
INSPECTION/REPLACEMENT
inspect according to general maintenance
All parts
8.
instructions (page 4-1).
4-1320

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