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 Test Step 2. Inspect for Leaks in
Gauge Indicates High
Reservoir.
Temperature, Does Not
Reservoir OK - Proceed to step 2.
1. Add engine coolant to coolant res-
Function, or Is Inaccurate -
ervoir (Figure 2, Item 2) (WP 0090)
Reservoir Cracked, Damaged, or
Continued
Leaking - Replace reservoir (WP
and inspect reservoir for cracks,
0096).
damage, and Class III leaks.
2. Inspect radiator (Figure 2, Item 1)
Radiator OK - Proceed to step 3.
for damage and Class III leaks.
Radiator Leaking - Replace radiator
(WP 0092).
Proceed to Test Step 9.
Radiator Damaged - Replace radiator
(WP 0092).
Proceed to Test Step 9.
3. Inspect coolant recovery hose
Recovery Hose and Clamp OK -
(Figure 2, Item 5) for loose clamps
Proceed to Test Step 3.
(Figure 2, Items 3 and 7), cracks,
Recovery Hose Clamp Loose or
splits, damage, and Class III leaks
Leaking at Connection - Tighten or
at radiator connection (Figure 2,
replace coolant recovery hose clamps
Item 6) and reservoir connection
(WP 0097).
(Figure 2, Item 4).
Proceed to Test Step 9.
Recovery Hose Cracked, Split,
Damaged, or Leaking - Replace
coolant recovery hose (WP 0097).
Proceed to Test Step 9.
0021-4
