MANOMETER HIGH OR LOW PRESSURE READING

TM 5-6640-214-14

Table 3-2. Troubleshooting - Continued

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

5. MANOMETER HIGH OR LOW PRESSURE READING

Step 1. Check for improper zero setting.

Check zero setting. Make proper adjustment.

Step 2. Check for leaks or obstructions.

Locate leaks or obstructions, make applicable corrections.

6. VACUUM PUMP INSUFFICIENT PRESSURE

Step 1. Check for low oil level.

Fill pump to prescribed level.

Step 2. Check for leakage in line.

Locate leak and repair line.

Step 3. Check if motor is functioning properly.

Check for loose connections.

7. AIR COMPRESSOR PUMPING OIL

Step 1. Check for clogged intake filter.

Change filter element.

8. AIR COMPRESSOR KNOCKS OR RATTLES

Step 1. Check for loose belts or pulleys.

Tighten belt or pulley.

9. AIR COMPRESSOR AIR DELIVERY DROPPING

Step 1. Check for clogged intake filter.

Change filter element.

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