TM 5-4310-393-14
4-25.
PREVENTIVE MAINTENANCE DURING STORAGE.
Operate the compressor once every three months as follows:
a.
Remove the dust cap from the inlet port and install the inlet filter.
b.
Open the discharge valve and allow the system to run approximately 5 minutes until there is outflow from
the valve and oil is visible in the sight glass of the oil regulating valve.
c.
Shutdown the compressor.
d.
Open the condensate drain valves, depressurize the unit then close the drain valves again
e.
Remove the intake filter and replace the dust cap on the inlet port.
4-25.1. LUBRICATION OILS FOR PRESERVATION.
After prolonged storage periods, the oil will age in the compressor. The oil must be drained at least every 36 months and
replaced with fresh preservative oil The stated period can only be attained when the crankcase is sealed during the
preservation period in accordance with the preservation requirements.
a. After changing the oil, the compressor must be operated according to the instructions above.
b.
Check the lubrication of the compressor in accordance with section 4 during the every-three-month brief
operation or when turning the compressor.
4-26.
REACTIVATION AFTER STORAGE.
4-26.1. COMPRESSOR UNIT.
a. Remove the dust cap from the inlet port and install the intake filter.
b.
Check the oil level of the compressor. If necessary, change the oil and oil filter.
c. For units with a filter system, change all filter cartridges.
d. Run the compressor with open discharge valve for approximately 5 minutes. Check for proper operation of
the lubricating system.
e.
After 5 minutes, close discharge valve and run the system up to final pressure until the final pressure safety
relief valve vents.
f.
Check the 1st and 2nd stage safety relief valves for leakage (Figure 3-7).
g. Establish the cause of any faults from the troubleshooting table, Table 3-1 and remedy.
h. Stop the unit when it is running properly. The compressor is then ready for operation.
4-26.2. ENGINE UNIT.
Drain preservative oil from crankcase and fuel tank. Restore engine to operating condition as for a new unit. Refer to
Chapter 2, Section III.
4-35
