TM 5-4310-387-14
6-5. General Support Troubleshooting Procedures. Refer to symptom index to locate the troubleshooting procedure
for the observed malfunction. Table 6-1 lists malfunctions that may occur during operation or maintenance of the air
compressor. Tests, inspections, and corrective actions should be performed in the order listed. If a malfunction is not
corrected by the corrective actions listed, notify your supervisor.
NOTE
This table is not intended to cover every possible symptom, but is rather a list of the more
frequent problems and some of their causes.
SYMPTOM INDEX
Symptom
Page
1.
Engine does not start ......................................................................................................................
6-2
2.
Engine runs unevenly: low output ....................................................................................................
6-3
3.
Engine races ...................................................................................................................................
6-3
4.
Engine exhaust emits excessive blue smoke ...................................................................................
6-3
5.
Engine runs hot ...............................................................................................................................
6-3
6.
Excessive oil consumption ...............................................................................................................
6-4
7.
Unusual engine knocks and noises..................................................................................................
6-4
8.
Compressor noisy ...........................................................................................................................
6-4
9.
Compressor pressure low ................................................................................................................
6-5
10.
Compressor output volume low .......................................................................................................
6-6
Table 6-1. General Support Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. ENGINE DOES NOT START.
Step 1. Check fuel injection pump.
Repair damaged fuel injection pump (para 6-16).
Step 2. Check governor assembly.
Replace or repair damaged governor assembly (para 6-17).
Step 3. Check camshaft assembly.
Replace a defective camshaft assembly (para 6-19).
Step 4. Check piston and connecting rod assemblies.
Replace or repair damaged piston and connecting rod assemblies (para 6-20).
6-2
