TM 5-4220-211-12&P
CHAPTER 4
MAINTENANCE, TROUBLESHOOTING AND REPAIR
Section I
GENERAL INFORMATION
4-1.
GENERAL. In order to be assured that the breathing air produced by this compressor is of acceptable quality for
human consumption, the compressor and all elements of the overall system must be carefully maintained in strict
compliance with the schedules and procedures contained in this manual. Keeping complete and accurate records of all
maintenance performed and all repairs required can prevent serious injury to the operating personnel or to the diver using
the air produced by the unit.
Section II
PREVENTIVE MAINTENANCE
4-2.
COMPRESSOR MAINTENANCE SCHEDULE. The maintenance requirements of the compressor are all related
to either frequency of use or operating time. Table 4-1 lists the maintenance item, the frequency of maintenance and
appropriate instructional reference paragraph.
Table 4-1. COMPRESSOR MAINTENANCE SCHEDULE
of Maintenance
Maintenance Item
Ref. Par.
Daily-Every 8 hours
Crankcase-Check Oil Level
2-1f
Daily
Fill Hose-Check for Wear and Damage
4-4b
Every 15 min.
Interstage Separator-Drain Condensate
4-4c
Every 40 hours/12 mos.
Interstage Separator-Remove, Disassemble, Clean,
Lube, and Reassemble
Every 15 min.
Final Separator-Drain Condensate
4-4c
Every 40 hours/12 mos.
Final Separator-Remove, Disassemble, Clean, Lube,
416d,
and Reassemble
4-25r
Every 20 hours/6 mos.
Purifier Chamber-Replace Cartridge
4-4d
Every 40 hours/12 mos.
Purifier Chamber Assembly-Remove, Disassemble,
4-10, 4-14,
Clean, Lube, and Reassemble
4-18, 4-23,
4-27
Every 15 min.
Purifier Chamber-Drain Condensate
4-4d
First 20 hours/
Crankcase-Change Oil
4-4c
Every 100 hours/6 mos.
Every 20 hours
Inlet Air filter-Clean
4-4a
Every 10 hours
Inlet Air filter-Clean during operation in extreme heat,
4-4a
dusty, or sandy areas.
Every 40 hours/12 mos.
Inlet Air Filter-Replace
4-4a
Every 40 hours
Inlet Air Filter-Replace during operation in extreme heat,
4-4a
dusty, or sandy areas.
Every 100 hours/6 mos.
All Air Tubing-Check for Leaks and Damage
4-4h
Every 100 hours/6 mos.
Intercooler/Aftercooler-Check and Clean
4-4i
Every 20 hours/6 mos.
Compressor Drive Belt-Check for Wear/Adjustment
4-4f, 4-4g
Every 100 hours/6 mos.
Compressor Assembly-Check for Loose or Missing Hardware
4-4j
Every 200 hours/12 mos.
First Stage Valve-Service/Replace as required
4-4k
Every 200 hours/12 mos.
Second Stage Valve-Service/Replace as required
4-4l
Every 200 hours/12 mos.
Third Stage Valve-Service/Replace as required
4-4m
Every 40 hours/12 mos.
Pressure Maintaining Valve-Remove, Disassemble,
4-11, 4-15,
Clean, Lube, and Reassemble
4-24
Every 12 mos.
Safety Valves-Test/Replace as required
Every 40 hours/12 mos.
Directional Flow Check Valve-Remove, Disassemble,
Clean, Lube, and Reassemble
Change 3 4-1
