TM 5-2420-231-23-1
0021
Table 1. Engine Coolant Temperature Gauge Indicates High Temperature,
Does Not Function, or Is Inaccurate - Continued.
021
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Engine Coolant Temperature 5. Inspect heater shutoff valve
Heater Shutoff Valve OK - Proceed to
step 6.
Gauge Indicates High
(Figure 7, Item 5) for looseness,
Heater Shutoff Valve Loose - Remove
Temperature, Does Not
damage, or Class III leaks.
clean and install heater shutoff valve
Function, or Is Inaccurate -
(WP 0129).
Continued
Proceed to Test Step 9.
Heater Shutoff Valve Damaged or
Leaking - Replace heater shutoff valve
(WP 0129).
Proceed to Test Step 9.
6. Inspect water inlet housing
Water Inlet Housing Bolts Loose -
Remove clean and install water inlet
(Figure 7, Item 8) for cracks, dam-
housing (WP 0129).
age, or Class III leaks between
Proceed to Test Step 9.
water inlet housing (Figure 7,
Water Inlet Housing Cracked,
Item 8) and water pump (Figure 7,
Damaged, or Leaking - Replace water
Item 9).
inlet housing (WP 0129).
Proceed to Test Step 9.
NOTE
Alternator removed for clarity.
Figure 7. Lower Radiator Hose, Heater Hose, and Water Inlet Housing.
0021