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 17.
Rotate drive belt tensioner pulley
Drive Belt Tensioner Pulley OK -
Gauge Indicates High
(Figure 17, Item 3) by hand. Pulley
Proceed to step 18.
Temperature, Does Not
should rotate quietly and smoothly
Drive Belt Tensioner Pulley Noisy
Function, or Is Inaccurate -
without sticking or binding.
When Rotated - Replace drive belt
Continued
tensioner (WP 0133).
Proceed to Test Step 9.
Drive Belt Tensioner Pulley Binds,
Sticks, or Is Rough When Rotated -
Replace drive belt tensioner
(WP 0133).
Proceed to Test Step 9.
18. Slowly rotate drive belt tensioner
Drive Belt Tensioner OK - Proceed to
(Figure 17, Item 1) through the full
step 19.
limits of travel. Drive belt tensioner
Drive Belt Tensioner Binds or Sticks
(Figure 17, Item 1) should fully
- Replace drive belt tensioner (WP
extend when released and actu-
0133).
ate smoothly without binding and
Proceed to Test Step 9.
sticking.
Drive Belt Tensioner Does Not Fully
Extend When Released - Replace
drive belt tensioner (WP 0133).
Proceed to Test Step 9.
Figure 17. Drive Belt Tensioner.
0021
19. Install drive belt (WP 0095).
20. Replace thermostat (WP 0130).
21. Turn ignition switch to the on posi-
tion (TM 5-2420-231-10).