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 11. Inspect fan drive pulley (Figure 15,
Fan Drive Pulley OK - Proceed to
Gauge Indicates High
Item 1) for wear, bends, or dam-
step 12.
Temperature, Does Not
age.
Fan Drive Pulley Worn, Bent, or
Function, or Is Inaccurate -
Damaged - Replace fan drive pulley
Continued
(WP 0135).
Proceed to Test Step 9.
12. Rotate fan drive pulley (Figure 15,
Fan Drive Support Hub OK - Proceed
Item 1) by hand while listening for
to step 13.
noise and rough or sticking bear-
Fan Drive Support Hub Noisy When
ings.
Rotated - Replace fan drive support
hub (WP 0135).
Proceed to Test Step 9.
Fan Drive Support Hub Binds, Sticks,
or Is Rough When Rotated - Replace
fan drive support hub (WP 0135).
Proceed to Test Step 9.
Figure 15. Fan Drive Pulley and Hub Support.
0021
