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Page Title:
CAB HEATER DOES NOT HEAT CAB - continued |
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 TM 10-3930-673-20-1
25. CAB HEATER DOES NOT HEAT CAB (CONT).
4
KNOWN INFO
TEST OPTIONS
Temperature control adjusted to
Visual inspection.
Are the control valve, heater
heat cab.
REASON FOR QUESTION
hoses, and connections free
Cab heater does not heat cab.
Damaged or leaking valve, hoses,
from signs of damage and/or
Light ON, switch OK.
or connections will affect heater
Control valve cable assembly OK.
leaks?
operation.
Engine water temperature OK.
POSSIBLE PROBLEMS
Control valve, hoses, or
connections faulty.
Heater obstructed or damaged.
Check valve,
hoses, and
connections for
NO
damage and leaks.
Replace as
necessary
(Para 17-8).
YES
5
KNOWN INFO
TEST OPTIONS
Temperature control adjusted to
Visual inspection.
Are heater fins free to radiate
heat cab.
REASON FOR QUESTION
heat? Is heater free from
Cab heater does not heat cab.
If heater obstructed or damaged,
signs of damage?
Light ON, switch OK.
heater will not operate properly.
Control valve cable assembly OK.
Engine water temperature OK.
Control valve, hoses, connections
OK.
POSSIBLE PROBLEMS
Heater obstructed or damaged.
Clean dirt and
debris from heater
NO
fins, or replace
damaged heater.
YES
Notify Direct Support
about this fault.
2-760
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