Table 4-1. Intermediate Direct Support Troubleshooting Procedures - Continued
TEST OR INSPECTION
3. LITTLE OR NO AIR PRESSURE BUILD-UP - Continued.
Inspect air compressor cylinder head for leaks or cracks.
If air compressor cylinder head leaks or is cracked, replace it (see paragraph 4-4).
4. AIR DELIVERY IS DROPPING.
Inspect air compressor for damaged or worn valves.
Refer to paragraph 4-4 for disassembly and inspection procedures for air compressor valves.
5. AIR COMPRESSOR IS PUMPING OIL.
Inspect air compressor for worn or damaged piston rings.
Refer to paragraph 4-5 for disassembly and inspection of air compressor piston rings.
6. AIR COMPRESSOR IS RUNNING TOO SLOW.
Refer to paragraph 4-6 for disassembly and inspection of air compressor.
7. AIR COMPRESSOR MAKES EXCESSIVE NOISE.
Refer to paragraph 4-6 for disassembly and inspection of air compressor components.
8. ENGINE WILL NOT START.
Check engine carburetor for damage.
If carburetor is damaged, refer to paragraph 4-3 for carburetor repair.