TM-9-2320-260-34-2

TRUCK, 5-TON, 6X6, M809 SERIES (DIESEL)

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE; VOLUME 2 OF 2

JULY 1994
TM-9-2320-260-34-2

  TM-9-2320-260-34-2 - Page 719 of 863

17-8. ENGINE COOLANT HEATER OVERHEAT SWITCH AND IGNITER MAINTENANCE
THIS TASK COVERS:
a. Overheat Switch Removal
d. Igniter Installation
b. Igniter Removal
e. Overheat Switch Installation
c. Inspection
lNITIAL SETUP
APPLICABLE MODELS
All
TEST EQUIPMENT
Multimeter (Appendix B, Item 115)
TOOLS
General mechanic’s tool kit
(Appendix B, Item 1)
Tool kit, electrical (Appendix B, Item 106)
MATERIALS/PARTS
Four screw-assembled lockwashers
(Appendix D, Item 405)
Screw-assembled lockwasher
(Appendix D, Item 400)
MATERIALS/PARTS (Contd)
Lockwasher (Appendix D, Item 259)
Lockwasher (Appendix D, Item 261)
O-ring (Appendix D, Item 282)
Washer (Appendix D, Item 526)
Gasket (Appendix D, Item 80)
Igniter (Appendix D, Item 158)
REFERENCES (TM)
TM 9-2320-260-20
TM 9-2320-260-34P-2
EQUIPMENT CONDITION
Engine coolant heater removed (TM 9-2320-260-20).
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).
17-18
TM 9-2320-260-34-2


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