ARMY TM 9-6115-644-24
AIR FORCE TO 35C2-3-446-12
MARINE CORPS TM 09249A/09246A-24/2
TABLE 2-6.
Unit Troubleshooting - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 3.
Step 4.
Check for blocked air intake system.
a.
If air intake system is not blocked, do step 4.
b.
If blocked, unblock or replace air intake system components as required, paragraph
2-72,
2-73.
Check blocked exhaust pipe or muffler.
a.
If blocked, unblock or replace muffler, paragraph 2-71.
b.
If exhaust pipe and muffler are not blocked, and trouble persists, notify next higher level
of maintenance.
7.
ENGINE KNOCKS.
Check for contaminated or incorrect grade of fuel.
a.
If contaminated or incorrect grade, drain engine fuel system and replace fuel
filter/water separator in accordance with TM 9-2815-255-24. Drain generator set
tank. Service generator set fuel tank with clean fuel of a proper grade (TABLE 2-2).
b.
If fuel is not contaminated and is correct grade, and trouble persists, notify next higher
level of maintenance.
8 .
BLACK OR GREY SMOKE IN EXHAUST.
Check for improper grade of fuel.
a.
If improper grade of fuel, drain engine fuel system. Drain generator set tank. Service
generator set fuel tank with clean fuel of a proper grade (TABLE 2-2).
b.
If proper grade of fuel, and trouble persists, notify next higher level of maintenance.
BLUE OR WHITE EXHAUST SMOKE.
Step 1.
Check for excessive engine oil level.
a.
If oil level is proper, do step 2.
b.
If oil level is excessive, drain to proper level, paragraph 2-1-2-4.
Step 2.
Check for improper grade of fuel.
a.
If proper grade of fuel, do step 3.
b.
If improper grade, drain engine fuel system and generator set tank. Service generator
set fuel tank with clean fuel of a proper grade (TABLE 2-2).
Step 3.
Check for defective thermostat, refer to TM 9-2815-255-24.
a.
If defective, replace thermostat in accordance with TM 9-2815-255-24.
b.
If thermostat is not defective, and trouble persists, notify next higher level of
maintenance.
2-19
