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 3. Inspect Coolant Suction
Gauge Indicates High
Hose and Tube for Leaks.
Temperature, Does Not
1. Inspect upper coolant suction hose
Upper Coolant Suction Hose and
Function, or Is Inaccurate -
(Figure 3, Item 3) for loose clamps
Clamps OK - Proceed to step 2.
Continued
(Figure 3, Items 2 and 4), cracks,
Upper Coolant Suction Hose Clamps
splits, damage, and Class III leaks
Loose or Leaking at Connection -
at coolant reservoir (Figure 3,
Tighten or replace upper coolant
Item 1) and coolant suction tube
suction hose clamps (WP 0097).
(Figure 3, Item 5).
Proceed to Test Step 9.
Upper Coolant Suction Hose
Cracked, Split, Damaged, or Leaking
- Replace upper coolant suction hose
(WP 0097).
Proceed to Test Step 9.
Coolant Suction Tube OK - Proceed
2. Inspect coolant suction tube
to Test Step 4.
(Figure 3, Item 5) for Class III
leaks, cracks, splits, dents, or
Coolant Suction Tube Cracked, Split,
Dented, or Damaged - Replace
damage.
coolant suction tube (WP 0097).
Proceed to Test Step 9.
Figure 3. Upper Coolant Suction Hose and Coolant Suction Tube.
0021
