TM9-4310-396-13
UNIT TROUBLESHOOTING TABLE 4-2
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. SPEED SLOWS DOWN.
Step 1. Check engine speed control cylinder assembly adjustment.
If setting is abnormal, correct setting.
If setting is normal, replace engine.
2. SEVERE VIBRATION.
Step 1. Check for damaged friction clutch assembly and groove pulley .
If friction clutch assembly or groove pulley is damaged, replace.
Step 2. Observe friction clutch assembly and groove pulley while compressor is running.
If friction clutch assembly is wobbling, replace.
If condition continues, replace engine.
If groove pulley is wobbling, replace.
If condition continues, replace compressor.
If condition continues, notify Direct Support maintenance.
3. LITTLE OR NO AIR PRESSURE BUILDUP.
Step 1. Check drain valve is open or leaking.
If drain valve open, or leaking, close drain valve.
If drain valve is leaking, replace.
If drain valve is not open or leaking, proceed to step 2.
Step 2. Inspect for leaks in pressure relief valve.
Pull out ring and release, pressure relief valve should seal.
If pressure relief valve is leaking or defective, replace.
If pressure relief valve is not leaking or defective, proceed to step 3.
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