TM 5-3810-306-20
TABLE 3-1. ORGANIZATIONAL TROUBLESHOOTING (CONTD)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
12. EXHAUST SMOKE EXCESSIVE UNDER LOAD
Step 1.
Air in fuel system.
a. Bleed fuel system (Refer to page 5-12.) and check for suction leaks. If no air detected, do Step
2.
Step 2.
Air fuel control line leak.
a. Inspect all fittings for leaks. If OK, do Step 3.
b. Tighten fittings as required.
Step 3.
Engine running too cold.
a. Remove and test thermostat.
b. Inspect cooling system. If OK, do Step 4.
c. Replace thermostat. (Refer to page 7-16.)
Step 4.
Fuel system malfunction.
a. Contact Direct Support Maintenance.
13. ENGINE WILL NOT REACH RATED SPEED WHEN LOADED
Step 1.
Defective tachometer.
a. Using STE/ICE, perform VTM test no. 10 to check accuracy of tachometer. If OK, do Step 2.
b. Replace tachometer. (Refer to page 8-32.)
Step 2.
Air fuel control line leaks and/or restricted.
a. Inspect all fittings for leaks. If OK, do Step 3.
b. Tighten fittings or replace line(s) as required.
Step 3.
Fuel supply restricted.
a. Replace fuel filter (Refer to page 5-15.) and check fuel lines for restrictions. If OK, do Step 4.
3-12
