TM 9-2330-381-14
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
APU - CONT
3.
ENGINE RUNS ROUGH
Step 1.
Check for contaminated fuel filter or clogged filter block.
Disassemble fuel filter and filter block and check for
blockage. If blocked, clear passages, replace fuel filter, and
reinstall fuel filter and filter block (para. 4-105).
Step 2.
Visually check for clogged or dirty air cleaner.
If clogged or dirty, clean or replace air cleaner (para. 4-103).
Step 3.
Check for blockage in fuel lines.
Remove fuel lines and check for blockage. Clear blockage or
replace fuel lines (para. 4-104).
Step 4.
Visually check for blockage or holes in air intake manifold.
Disassemble air intake manifold. Inspect, clear blocked
passages, or replace intake manifold as required (para. 4-103).
Step 5.
Check nozzle holder for looseness and blockage.
Tighten or remove nozzle holder. Clear any blocked passages
and reinstall or replace nozzle holder (para. 4-102).
Step 6.
Check for low compression by listening for compression leaks.
a. Check glow plug for looseness. Tighten or replace as
necessary (para. 4-97).
b. Visually check for cracks and listen for leaks around
cylinder head. Notify DS maintenance if a leak is found.
c.
Visually check for cracks and listen for leaks around
engine block. If any defects are found, or if above steps
do not correct malfunction, notify DS maintenance.
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