TM 5-4220-211-12&P
Symptom
Probable Cause
Correction
Compressor Output
Inlet Air Cleaner Clogged
Clean or Replace Air
Volume Low
Cleaner Element
Air Leaks at Fittings
Tighten Leaking Fittings
Safety Valves Opening
Replace Defective
Too Soon
Safety Valves
Replace Worn Parts
Drive Belt Slipping
Adjust/Replace Drive Belt
Engine Speed Too Low
Adjust Engine Speed
Leaking Condensate Drain
Tighten or Replace
Valves
Defective Valves
Mounting Bolts Loose
Tighten Loose Fasteners
Drive Sheaves Out of
Realign Drive Sheaves
Alignment
Readjust Belts
Safety Valves Open
Interstage Pressure Too High
Check/Replace Valves
Obstruction in System
Check and Correct
Obstruction
Air Has Oil Taste
Purifier Cartridge Saturated
Replace Purifier Cartridge
Incorrect Oil
Change to Correct
Oil-Clean Valves
Abnormal Belt Wear
Drive Sheaves Out of
Align Drive Sheaves
Alignment
or Too Tight
Oil or Grease on Belts
Clean or Replace
Drive Belts
NOTE
This table is not intended to cover every possible symptom, but is rather a list of the more
frequent problems and some of their causes.
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