TM-5-4310-389-14
2.
Remove service line fitting and service line gauge tube. Remove outlet tube to bulkhead fitting.
3.
Remove handle and securing nut from valve.
4.
Remove valve.
b.
Installation.
1.
Replace fittings on new valve by examining old valve and removing one fitting at a time.
2.
Install new valve and tighten retaining nut hand-tight.
3.
Loosely install outlet to bulkhead fitting, service line gauge tube, and service line.
4.
Tighten valve retaining nut and replace handle.
5.
Tighten all loose fittings.
6.
Perform operator's maintenance and run unit to full operating pressure.
7.
Soap test all fittings.
8.
Replace instrument rear panel.
Service Line Check Valve.
a.
The service line check valve serves a dual purpose in the air system:
1.
To prevent air from entering the purifier assembly in the wrong direction of flow.
2.
Allows the compressor to match the pressure that is being required by the service line pressure.
b.
Service line check valve is suspect when the service line pressure gauge reads higher than the line pressure
gauge, and upon opening the service line valve, they immediately equalize.
c.
Removal (air bled off system).
1.
Remove instrument back panel.
2.
Remove service line into check valve and 90-degree elbow.
3.
Remove check valve.
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