4-21 PRESSURE REGULATOR ASSEMBLY REPLACEMENT. (Refer to Figure 4-14)
This task covers:
General Mechanics Tool Box, Item 1, Section
Cover removed from Recovery / Recharger
III, Appendix B.
Air supply disconnected, paragraph 2-7
Close the ball valve (1) on the nitrogen bottle.
Close adjusting screw (2) by turning clockwise as far as it will go.
Crack the regulator to hose connection (3) to bleed off any remaining pressure. After pressure is relieved,
disconnect the hose.
Unscrew regulator (4) from cylinder by turning nut (5) counterclockwise.
Attach new regulator to cylinder by tightening nut (5) finger tight.
Adjust regulator until gauges are upright and readable.
Tighten regulator to cylinder connection making sure gauges stay upright.
Install hose connection (3) to regulator (4) outlet and tighten hose connection while holding regulator outlet
Turn cylinder ball valve (1) on and check for leaks and pressure indication on one gauge.
Turn adjusting screw (2) counterclockwise to check outlet pressure gauge (6).
Check for leaks by sound and leak detection compound (item 9, Section II, Appendix F).
If system will not be used immediately, close cylinder ball valve.