IOM-PBE-H
4
10. Slide the piston assembly into the cylinder,
TFE seat end in fi rst. NOTE: Piston should
move freely up and down within the cylinder.
Place the spring spacer (24) over the end of
the piston assembly. Ensure the "fl at" surface
side of spring spacer is up.
11. Center the piston spring (18) on top of the
spacer.
12. Apply Formula 8 thread sealant to the body
cap (16) male threads. Carefully position the
body cap over the piston spring and engage
the threads. NOTE: While engaging the
threads - may encounter minimum resistance
from upward force of the piston spring. With
hand pressure continue to press body cap
down evenly until threads are fully engaged.
Tighten to 100 ft.lbs. (135 N-m). These two
parts seal metal-to-metal with no gasket.
13. Re-orient body assembly in vise and secure
by the body cap, (body cap oriented down).
14. Center the pusher plate spring (23) around the
exposed upper end of the piston assembly.
Place the raised surface side of the pusher
plate (25) down on the pusher plate spring.
Ensure that the half round seat surface of
the pusher plate rests in the upper end of the
piston assembly.
14. Reinstall diaphragm, spring, etc. per Sec tion
VI.B. Step 9-12.
4. Rotate body cap (16) CCW to remove from
body.
5. Remove piston spring (18), piston spacer
(24), piston assembly (17) and cyl in der (26).
Remove screen fi lter (19) if Opt.-21. Inspect
TFE seating surface on the piston assembly
(17). NOTE: The pis ton (17) assembly can
not be dis-assembled. If the TFE seat is
damaged, re place the entire piston assembly.
6. Remove the cylinder gasket (27) and clean
con tact ing surface of body (1).
7. Clean body (1) cavity and all parts to be re-
used. NOTE: Regulator originally sup plied as
“oxygen clean”, main te nance must include a
lev el of clean li ness equal to Cashco's clean-
ing stan dard #S-1134. Contact factory for
de tails.
8. To re-install trim, position gasket (27) around
small end of the cylinder (26). Insert small end
of cylinder (with gasket) down inside center
of body. If unit includes Option -21 -- slide
screen fi lter (19) around the cylinder O.D.
9. Slip the u-cup seal (22) (open end of cup fac-
ing towards the large O.D. of the piston) over
the lower end of the piston assembly and into
the groove.
(12 pages)
(8 pages)
(8 pages)
(8 pages)
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