Table 5-1. Direct Support Troubleshooting - Continued

TM 5-4930-233-14

TM 4930-14/1

Table 5-1. Direct Support Troubleshooting - Continued

ITEM

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

HIGH PRESSURE PUMP LEAKS LUBRICANT FROM CYLINDER HEAD BODY

Check pump tube gaskets and/or packings for wear.

Replace worn gaskets and packings in pump tube assembly (paragraph 5-19)

AIR REGULATOR

AIR REGULATOR OPERATES ERRATICALLY OR WILL NOT REGULATE

Inspect valve for dirt.

Disassemble and clean regulator (paragraph 5-17).

AIR COMPRESSOR

COMPRESSOR PUMPS SLOWLY OR HAS INSUFFICIENT PRESSURE

Step 1. Check compressor head valves for leaks.

Clean or replace valves and valve components as needed (paragraph 5-15).

Step 2. Check for clogged or damaged head unloader valves.

Clean or replace unloader valves (paragraph 5-15).

COMPRESSOR USES EXCESSIVE AMOUNTS OF OIL

Inspect for worn or damaged piston oil rings.

Replace oil rings (paragraph 5-14).

COMPRESSOR MAKES EXCESSIVE NOISE WHEN OPERATING

Step 1. Inspect loose external parts.

Tighten any loose part found during inspection.

Step 2. Check for foreign matter such as carbon, metal chips, etc. on piston.

Remove head (paragraph 5-14) and clean.

5-6