TM 5-4310-451-14
Table 4-2. Mechanical Troubleshooting (Con’t).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 4
Check for plugged oil separator element.
Replace oil separator element (see paragraph 4-90).
15.
IMPROPER UNLOADING CAUSING SAFETY RELIEF VALVE TO OPEN.
Step 1
Check pressure regulating valve adjustment.
Adjust pressure regulating valve (see paragraph 2-11).
Step 2
Check for blocked pressure regulating valve Inlet.
Remove and clean pressure regulating valve (see paragraph 4-87).
Step 3
Check for defective blowdown valve,
Replace blowdown valve (see paragraph 4-88).
Step 4
Check for plugged element in oil separator.
Replace oil separator element (see paragraph 4-90).
Step 5
Check for defective pressure regulating valve.
Replace pressure regulating valve (see paragraph 4-87).
Step 6
Check for jammed governor and sullicon control linkage.
Notify Direct Support Maintenance.
Step 7
Check for restrictions in sullicon control system lines.
Clear restrictions or replace lines (see paragraph 4-40).
16.
START PRESSURE TOO HIGH.
Step 1
Check for blocked pressure regulating valve inlet.
Remove and clean pressure regulating valve (see paragraph 4-87).
Step 2
Check for defective blowdown valve.
Replace blowdown valve (see paragraph 4-88).
17.
EXCESSIVE VIBRATION.
Step 1
Check for loose fan hub.
Tighten fan hub (see paragraph 4-48).
Step 2
Check for collapsed, torn, or loose engine motor mounts.
Notify Direct Support Maintenance.
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