Table 2-1. DIRECT SUPPORT TROUBLESHOOTING - Continued
TEST OR INSPECTION
Check for excessive wear of crankshaft bearings or major engine oil leak.
Refer to General Support.
3e OIL OR FUMES SEEN AT ROAD DRAFT TUBE
Check for low cylinder compression pressure.
If only one cylinder has low compression, remove head and replace head gaskets (para. 2-19.8).
Otherwise, refer to General Support.
EXHAUST SMOKE BLACK
Check engine timing.
Retime engine, (para. 2-20.5).
Check for faulty injectors.
Replace injectors as required, (para. 2-20.5).
Check for low cylinder compression.
a. Regrind or replace exhaust valves, (para. 2-20.7).
b. Replace leaking cylinder head gasket, (para. 2-20.8).
c. Refer to General Support.
3g EXHAUST SMOKE WHITE
Check for misfiring cylinders.
a. Replace injectors, (para. 2-20.5).
b Retime engine, (para. 2-20.5).
3h HIGH LUBRICATING OIL CONSUMPTION
Check for gasket or seal leaks.
Replace as required.
Step 2 Check air compressor for excessive oil use (eg, oil in compressor discharge line).
a. Repair compressor as required.
See TM 5-4210-220-12.
b. Refer to General Support.