Table 2-1. Direct Support and General Support Troubleshooting Table

TM5-241O-237-34

Table 2-1.

Direct Support and General Support Troubleshooting Table (Cont'd)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Step 2.

Check for too much oil in valve mechanism compartment.

Check if there is a plug in each end of rocker shaft.

Install plug(s),

if necessary (page 3-95).

Step 3.

Replace valve guides (page 3-30).

Step 4.

Inspect piston rings (page 3-77), cylinder liners (3-24), and cylinder

liner projection (page 3-24).

Replace piston rings (page 3-77) and/or cylinder liners (page 3-24), if

necessary.

END OF TESTING!

9. ENGINE MISSES OR RUNS ROUGH

Step 1.

Check fuel injection timing (page 4-26).

Adjust timing, if necessary (page 4-26).

Step 2.

Operate engine at rpm where misfiring or rough operation occurs. Loosen the

fuel line nut at a fuel injection pump. This will stop fuel flow to that

cylinder. Do this for each cylinder until a loosened fuel line is found

that makes no difference in engine performance. Be sure to tighten each

fuel line nut after the test before the next fuel line nut is loosened.

When a cylinder is found where the loosened line does not make a difference

in engine performance, test the fuel injection nozzle for that cylinder

(page 4-8).

a. Repair (4-8) or replace defective nozzle (TM5-241O-237-2O).

If nozzle is operating properly, replace the fuel injection

pump for that cylinder (page 4-14).

Step 3.

Check valve clearance (TM5-241O-237-2O).

Adjust valves, if necessary (TM5-241O-237-2O).

Step 4.

Check for worn, bent or broken push rod.

Replace push rod, if necessary (page 3-95).

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