Apeks XL4 SECOND STAGE Technical Maintenance Manual page 11

XL4 SECOND STAGE TECHNICAL MAINTENANCE MANUAL
5
Keeping the lever setting tool in place, press inward on the ad-
justment wheel of the inline tool. Slowly rotate the adjustment
wheel until the inline tool
engages the seat (14). Turn
the seat counter-clockwise
by approximately 1/16 of a
turn. This will raise the lever
(15). Continue to adjust in
1/16 turns until there is a
steady flow of air.
6
Place the "NO GAS FLOW"
RA911116) onto the plastic pad of the diaphragm (6). Depress
the diaphragm by pushing the tool in until it stops against the case
(7).
If no gas flows from the second stage proceed to step 8.
If gas flows from the valve follow step 7.
NOTE: The second stage "SHOULD NOT LEAK AIR" with this
test. If it does, the lever is set too high.
7
Keeping the lever setting tool in place, press inward on the
adjustment wheel of the inline tool. Slowly rotate the adjust-
ment wheel until the inline
tool engages the seat (14).
Turn the seat clockwise by
approximately 1/16 of a turn.
This will lower the lever.
Repeat From Step 3.
CAUTION: Subjective breathing test must be performed every
time the lever is adjusted.
side of the lever setting tool (
8
Turn off the air supply and purge the second stage by pressing
the center pad of the diaphragm (6). Pull back on the adjust-
ment wheel of the inline tool and remove it from the second stage.
Remove the MP hose from the inline tool.
CAUTION: When removing the inline adjustment tool from the
second stage, remember to pull the handwheel back to disen-
gage it from the seat. Failure to perform this step can cause
changes to your adjustment.
9
Install the swivel end of the
hose onto the second stage
hand tight. Hold the inlet shroud
(12) steady with a 13/16" wrench.
Using a torque wrench with an
11/16" crow-foot, tighten the hose
fitting to 45 in-lb (5 Nm).
11