TM 5-3805-280-24-2
Cooling System
REMOVE AND INSTALL COOLANT
25
32
HEATER--IF EQUIPPED
CAUTION: To avoid shock or hazardous
operation, always use a three-wire heavy-duty
electrical cord equipped with three-wire
connectors. If a two-to-three contact adapter is
used at the wall receptacle, always connect
green wire to a good ground. Keep electrical
connectors clean to prevent arcing. Only plug
coolant heater into electrical power if heating
element is immersed in coolant. Sheath could
burst and result in personal injury.
1. Unplug heater from electrical power source.
2. Drain cooling system.
3. Disconnect cord (A) from heater assembly.
4. Loosen retaining nut (C) and remove adapter (D) and
heater element from block.
5. Inspect and replace parts as necessary.
NOTE: The heater element (G) cannot be repaired.
Replace if defective.
6. Install a new gasket (E) and O-ring (F). Install heater
element through adapter (D) and install nut (C) loosely.
7. Install heater into cylinder block with element pointing
to the rear.
8. Tighten adapter (D).
9. Turn element clockwise and then counterclockwise
until element contacts casting. Move element midway
between contact points.
A--Cord
B--Dust Cap
C--Retaining Nut
10. Hold element with a wrench and tighten retaining nut
D--Adapter
(C) to specifications.
E--Gasket
F--O-Ring
Coolant Heater Lock Nut--Specification
G--Heater Element
Torque ............................................................................. 34 Nm (25 lb-ft)
Continued on next page
RG,25,JW7546
1920NOV971/2
13-355