Cashco 1000 Cryogenic - Manual (Page 5)

IOM-1000HP-Cryogenic 5
Dim. Mat'l
Valve Size
1/2" 3/4" 1" 1-1/4" 1-1/2" 2"
A BR 7/8" 1-5/32" 1-7/16" 1-13/16" 1-25/32" 2-3/16"
B BR 5/8" 25/32" 3/4" 29/32" 7/8" 29/32"
A SST 13/16" 1-1/16" 1-7/16" 1-1/2" 1-25/32" 2-5/32"
B SST 9/16" 23/32" 3/4" 11/16" 7/8" 29/32"
If either of the above dimensions are ex-
ceeded by 1/8", re place rocker arm (14).
19. Check rocker arm shaft (17) for wear and
straightness. Replace if damaged. Rein stall
in body (1) thru rocker arm (14). Apply thread
sealant to the rocker arm shaft (17) threads
prior to tightening. Make sure that the rocker
arm shaft (17) enters the support slot op-
po site the threaded open ing, and does not
align crooked and restrained from full thread
engagement of the rocker arm shaft (17).
Make sure that the rocker arm (14) prongs that
straddle the piston (24) hold the piston collar
(23) against the piston (24); do not allow the
rocker arm (14) prongs to push directly on the
piston (24).
20. Clean the body (1) diaphragm fl ange. Seal ant
may be applied to the body (1) fl ange prior
to diaphragm (20) placement. Install a new
diaphragm gasket (19).
21. Using small gauge wire approximately 18"
long, form a hook, and place the hook over
one prong of the rocker arm (14), and rotate
the rocker arm (14) up until slack is re moved
in the mechanism. Secure the wire thru a body
(1) fl ange bolt hole on the outlet side of the
regulator.
22. Take the diaphragm sub-assembly (Step 16)
and lower it down into the body (1) cavity off-
center approximately 3/4"-1" and to wards the
inlet side of the regulator. When fully lowered,
slide the diaphragm sub-as sem bly horizon-
tally towards the regulator's outlet. The wire
of Step 21 should hold the rocker arm (14) up
to allow engaging of the pusher plate and stud
(13) (with stud nut (10) and stud collar (16)),
so the rocker arm (14) prongs rest directly on
the stud collar (16). (Do not allow the rocker
arm (14) prongs to get between the stud
nut (10) and the stud collar (16).) Pull fi rmly
to remove wire holding rocker arm (14) up.
23. Align diaphragm (20) bolt holes with body (1)
fl ange bolt holes. Set range spring (27) onto
pressure plate (3), place spring button (4) on
top of range spring (27). Place cryo gen ic,
multi-purpose temp erature lubricant into de-
pression of spring button (4).
15. Inspect pressure plate (3) to ensure no
de for ma tion due to over-pres sur iza tion. If
de formed, bent, or otherwise distorted, re-
place.
16. Ensuring that the curved outer rim side of the
pressure plate (3) rests against the dia phragm
(20) directly, place the pressure plate (3) over
the pusher plate and stud (13). Place nut (11)
onto the stud (13) and tighten to 35 ft.-lbs.
torque for metal diaph ragm. Use two fl ange
bolts (8) to keep multiple dia phragms' (20)
bolt holes prop er ly aligned while tightening
the stud nut (10). (DO NOT USE FINGERS
TO HOLD DIAPHRAGMS (20) DURING
TIGHT EN ING OF NUT (11).)
17. Remove cotter pin (15) securing stud nut (10)
to lower end of pusher plate and stud (13), and
replace with a new pin (15). (Do not allow the
stud nut (10) to move when the cotter pin (15)
is removed.)
18. Remove rocker arm shaft (17) and rocker
arm (14). Measure inside of rocker arm (14)
"prongs" as indicated below: