TM 9-2320-260-34-2
17-11. ENGINE COOLANT HEATER HOUSING AND HEAT EXCHANGER MAINTENANCE
THIS TASK COVERS:
c. Installation
a. Removal
b. Cleaning and Inspection
INITIAL SETUP
EQUIPMENT CONDITION
APPLICABLE MODELS
Engine coolant heater flame detector switch
All
removed (para. 17-3).
TOOLS
Engine coolant heater restriction thermostat
General mechanic's tool kit
removed (para. 17-5).
(Appendix B, Item 1)
Engine coolant heater burner removed
MATERIALS/PARTS
GENERAL SAFETY INSTRUCTIONS
Three screw-assembled lockwashers
q Compressed air source will not exceed 30 psi
Drycleaning solvent (Appendix C, Item 46)
(207 kPa).
q Eyeshields must be worn when cleaning with
REFERENCES (TM)
compressed air.
TM 9-2320-260-34P-2
q Keep fire extinguisher nearby when using
drycleaning solvent.
a. Removal
1. Remove three screw-assembled lockwashers (2) from heater housing (1). Discard screw-assembled
lockwashers (2).
2. Separate heater housing (1) and remove heat exchanger (5) from heater housing (1).
b. Cleaning and Inspection
WARNING
Compressed air source will not exceed 30 psi (207 kPa). When
cleaning with compressed air, eyeshields must be worn. Failure
to wear eyeshields may result in injury to personnel.
Drycleaning solvent is flammable and will not be used near open
flame. Use only in well-ventilated places. Failure to do so may
result in injury to personnel.
1. Inspect heat exchanger (5) for exterior damage, leaks, and corrosion. Replace heat exchanger (5) if
damaged, heavily corroded, or leaks are present. To remove carbon from heat exchanger (5), soak in
water for a short time and dry with compressed air.
2. Clean housing (1) surface with drycleaning solvent and dry with clean rag or compressed air.
c. Installation
Ensure flame detector switch adapter (3) and exhaust tube (4) are alined and install heat exchanger (5)
in heater housing (1) with three new screw-assembled lockwashers (2).
17-26
