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 TM 5-1940-277-10
TM 1940-10/1
Table 3-1. Troubleshooting
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
4.
OVERHEATING (ENGINE AUDIBLE ALARMS WILL COME ON) (ENGINE COOLANT WARNING LIGHT COMES ON).
NOTE
Perform Step 1. and Step 3. for MK1 and MK2 w/ Sabre 5.95 Liter.
Perform Step 2 for MK2 w/ Cummins 6BT 5.9 Liter.
Step 1.
Turn OFF engine by pulling out the engine stop control (1) for affected engine.
Step 2.
Turn OFF engine by moving ON switch (9) to down position.
Step 3.
Turn OFF alarm mute switch (4) for effective engine to stop audible alarm.
Step 4.
Check intake strainer on effective engine (see PMCS, item 22).
WARNING
If cooling system is hot, open coolant filler cap slowly until all pressure is
gone. Do not touch the cap with your bare hand. Never take off cap while
engine is overheated. Allow it to cool down first.
Step 5.
Remove filler cap (5) for effected engine by turning clockwise. Check to see that water level is not more
than 1 inch below bottom of neck (6).
Add Coolant.
Step 6.
Check belt tension for affected engine (see page 3-18).
NOTE
Perform Step 7. for MK1 and MK2 w/ Sabre 5.95 Liter.
Step 7.
Check for leaks around hose connections and water pumps for effected engine.
Notify supervisor.
Step 8.
Check keel coolers on MK2 (see PMCS, item 1.1).
5.
CHARGE WARNING LIGHT (7) COMES ON (NORMAL OPERATION).
Step 1.
Check appropriate instrument panel voltmeter (8) for reading at alternator output. If output reading is 24 vdc
or above the warning light is malfunctioning. If reading is 0-20/22 vdc or slightly above the alternator or
voltage regulator is malfunctioning.
Mission may be completed. Unit maintenance must be notified of problem.
Change 3
3-7
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