TM 9-2320-260-34-2
17-8. ENGINE COOLANT HEATER OVERHEAT SWITCH AND IGNITER MAINTENANCE
THIS TASK COVERS:
d. Igniter Installation
a. Overheat Switch Removal
e. Overheat Switch Installation
b. Igniter Removal
c. Inspection
lNITIAL SETUP
MATERIALS/PARTS (Contd)
APPLICABLE MODELS
All
Lockwasher (Appendix D, Item 259)
Lockwasher (Appendix D, Item 261)
TEST EQUIPMENT
O-ring (Appendix D, Item 282)
Multimeter (Appendix B, Item 115)
Washer (Appendix D, Item 526)
Gasket (Appendix D, Item 80)
TOOLS
Igniter (Appendix D, Item 158)
General mechanic's tool kit
REFERENCES (TM)
(Appendix B, Item 1)
Tool kit, electrical (Appendix B, Item 106)
TM 9-2320-260-20
TM 9-2320-260-34P-2
MATERIALS/PARTS
EQUIPMENT CONDITION
Four screw-assembled lockwashers
Engine coolant heater removed (TM 9-2320-260-20).
Screw-assembled lockwasher
NOTE
Tag all leads for installation.
a. Overheat Switch Removal
1. Remove four screw-assembled lockwashers (6) and guard (7) from heater housing (8). Discard
screw-assembled lockwashers (6).
2. Remove nut-assembled lockwasher (2), ground lead (3), air tube (4), and elbows (1) and (5) from
heater housing (8).
3. Disconnect lead (9) from overheat switch (13).
4. Disconnect leads (10) and (12) from tab connector (11) and remove tab connector ( 11) from overheat
switch (13).
5. Remove nut (32), lockwasher (31), retainer (30), overheat switch (13), washer (14), and O-ring (15)
form heater housing (8). Discard lockwasher (31), O-ring (15), and washer (14).
b. Igniter Removal
1. Remove four nut-assembled lockwashers (27) and end plate (26) from heater housing(8).
2. Remove screw-assembled lockwasher (21), ground strap (22), igniter lead (23), and lockwasher (24)
from burner (16). Discard screw-assembled lockwasher (21) and lockwasher (24).
3. Remove nut (28) and ground strap (22) from stud (29).
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