ARMY TM 9-6115-642-24
AIR FORCE TO 35C2-3-455-12
MARINE CORPS TM 09247A/09246A-24/2
TABLE 2-6. UNIT TROUBLESHOOTING - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
14. ENGINE COOLANT TEMPERATURE TOO LOW.
Step 1. Check for defective thermostat, refer to TM 9-2815-253-24.
a. If thermostat is not defective, do Step 2.
b. If defective, replace thermostat in accordance with TM 9-2815-253-24.
Step 2. Test for defective temperature sender, paragraph 2-92.1.
a. If temperature sender is not defective, do Step 3.
b. If defective, replace temperature sender, paragraph 2-92.
Step 3. Test for defective COOLANT TEMP. indicator, paragraph 2-40.2.
a. If defective, replace COOLANT TEMP. indicator, paragraph 240.
b. If COOLANT TEMP. indicator is not defective and trouble persists, notify next higher level of mainte-
nance.
15. EXCESSIVE FUEL CONSUMPTION.
Step 1. Check for blocked air intake system.
a. If air intake system is not blocked, do Step 2.
b. If blocked, unblcck or replace air intake system components as required, paragraphs 2-66 and 2-67.
Step 2. Check for leaks in fuel system.
a. If no leaks in fuel system, do Step 3.
b. If leaks found, repair fuel system as required.
Step 3. Check for contaminated oil,
a. If oil is contaminated, change the oil, paragraph 2-88.2.
b. If oil is not contaminated and trouble persists, notify next higher level of maintenance.
16. COOLANT IN CRANKCASE OR OIL IN COOLANT.
Check for coolant or oil contamination.
If contaminated, notify next higher level of maintenance.
Step 1. Check for bent or broken cooling fan blades, paragraph 2-74.1.
a. If fan blades are not damaged, do Step 2.
b. If damaged, replace cooling fan, paragraph 2-74.
Step 2. Check for contaminated or incorrect grade of fuel.
a. If fuel is not contaminated and is correct grade, do Step 3.
b. If contaminated or incorrect grade, drain fuel tank. Replace fuel filter/water separator element, para-
graph 2-87, Service fuel tank with clean fuel of proper grade (TABLE 2-2). Prime engine fuel system
in accordance with TM 9-2815-253-24.
2-20
17. ENGINE VIBRATING.
