Service The Cylinder Supply Modules - GE Aespire 7100 Technical Reference Manual

Aespire 7100
9.5 Service the cylinder supply modules
9 -8
AWARNING
9.5.1 Tl ghtenlng
procedure for
hlgh-pressure
tube flttlngs
Nole
9.5.2 Replace
prlmary regulator
module (complete
replacement)
Be careful not to expose internal components to grease or oil (except Krytox or
equivalent).
刊 e cylinder pressure gauge is connected to the cylinder supply through a copper tube
with fittings at both ends. Use the following tightening procedure whenever you are
replacing a cylinder supply or a cylinder pre臼 ure gauge.
1. Insert the tubing into the fitting until the ferrule seats in the fitting.
2. Tighten the nut by hand.
3. Continue tighteningthe nutwith a wrench until it reaches the original position (about
1/4 turn). You will feel an increase in resistance at the original position.
4. After reachingthe original position , tighten the nutjustslightly.
If you are installing a new tube that has not been tightened before , tighten the nut with
a wrench an additional3/
4
of a turn after the nut is finger tigh
t.
1. Bleed all gas pressure from the machine (Section 9.1).
2. Ensure 由 at all cylinder and pipeline gauges read zero before proceeding.
3. Remove the rear panel (Section 9.2).
4. Disconnect the high-pressure cylinder gauge fi忧ing.
5. Disconnect the output tube fi忧ing.
6. Remove the three mounting screws and
lockwashers.
7. To reassemble , perform the previous
steps in reverse 0ωer.
• Tighten the high-pressure fitting as
detailed in Section 9.5.1
• Pull on the cylinder output fitting to
ensure it is locked in place.
8. Check the output of the regulator
BEFORE you install the rear pane l.
Adjust if nece臼 ary (Section 5.1).
9. Perform the checkout procedure
(Section 3).
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