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10
6. Turn the regulator over and drop the pin (54) through the
center hole in the first-stage body. Make sure the pin is
centered in the hole. Place the pin support (32) over the pin.
Use your finger to compress the pin support a few times to
ensure it has proper spring action.
7. Press the diaphragm (31b) into place. Use your finger to
ensure that the edges of the diaphragm are seated evenly.
Place the thrust washer (31a) over the diaphragm, making
sure it is seated flat against the diaphragm.
8. Place the spring pad (30) in the center of the diaphragm
and place the main spring (28) onto the spring pad.
9. Thread the spring retainer (29) into the body. secure the
body in a vise using a vise mounting tool. using a 28mm
socket attached to a ft/lb torque wrench, tighten the spring
retainer to 25±2 ft/lbs.
MENTOR Technical Maintenance Manual
10. Place the friction washer (27) atop the spring. Thread the
adjustment screw (26) into the spring retainer (29). using an
8mm hex key, tighten the adjustment screw until no threads
are visible.
Second Stage Reassembly
1. Place two new lubricated o-rings (48) onto the adjustable
nozzle (49). Press the nozzle into the body. using a 4mm hex
key, tighten the nozzle until it is flush with the body.
2. Press a new LP seat (41), smooth side facing outward,
into the face of the poppet (40)
3. Place the poppet bearing (38), squared side facing up-
ward, onto the poppet. using the poppet as an installation
tool, guide the poppet bearing into the lever bracket (37).
Press the poppet bearing into place, making sure it is flush
with the lever support. Remove the poppet.
must be flush
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