Cashco 1000 HP Basic - Manual (Page 5)

5 IOM-1000HP-Basic
If any of the above dimensions are ex ceeded
by 1/8" (3 mm), re place rocker arm (14).
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:
as those originally supplied. Sub sti tu tion may
cause improper gasket com pres sion. It may
also adversely change the di a phragm setting,
which will affect the unit's per for mance, i.e.
Option 1000-45, non-as bes tos construction
utilizes special gaskets.
21. Using small gauge wire approximately 18"
(500 mm) 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 removed in the mechanism. Secure the
wire through 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" (20-25 mm)
and to wards the inlet side of the regulator.
When fully low ered, slide the diaphragm sub-
as sem bly horizontally to wards the regulator's
out let. 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
hold ing 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 multi-pur pose,
high temperature grease into de pres sion of
spring button (4).
24. Aligning the matchmarks, place spring cham-
ber (2) over the above stacked parts. Install
all bolts (8), nuts (9) and nameplate (28) by
hand tight en ing. Tighten bolting (8 and 9) in
a cross pattern that allows spring chamber
(2) to be pulled down evenly. Rec om mend ed
torques are as follows:
19. Check rocker arm shaft (17) for wear and
straightness. Replace if damaged. Rein stall
in body (1) through 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 opposite the threaded open ing, and does
not align crooked and re strained 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. Install
a new diaphragm gasket (19). Composition
(soft) diaphragms require no diaphragm gas-
ket. NOTE: Use only gaskets man u fac tured
by Cashco, Inc., that are of the same ma te ri al
DIM MAT'L
Valve Size
1/2" (DN15) 3/4" (DN20) 1" (DN25)
A BRZ 7/8" (22mm) 1-5/32" (29mm) 1-7/16" (37mm)
B BRZ 5/8" (16mm) 25/32" (20mm) 3/4" (20mm)
A SST 13/16" (21mm) 1-1/16" (27mm) 1-7/16" (37mm)
B SST 9/16" (14mm) 23/32" (18mm) 3/4" (20mm)
DIM MAT'L 1-1/4" (DN32) 1-1/2" (DN40) 2" (DN50)
A BRZ 1-13/16" (46mm) 1-25/32" (45mm) 2-3/16" (56mm)
B BRZ 29/32" (23mm) 7/8" (22mm) 29/32" (23mm)
A SST 1-1/2" (38mm) 1-25/32" (45mm) 2-5/32" (55mm)
B SST 11/16" (17mm) 7/8" (22mm) 29/32" (23mm)
Body Size Bolt Size All Diaphs.*-Torque
1/2" (DN15)
3/4" (DN20)
1" (DN25) 3/8"
7/16"
1/2"
25 ft-lbs. (34 N-m)
35 ft-lbs. (47 N-m)
45 ft-lbs. (61 N-m)
1-1/4" (DN32)
1-1/2" (DN40)
2" (DN50) 1/2"
9/16"
5/8"
45 ft-lbs. (61 N-m)
80 ft-lbs. (108 N-m)
80 ft-lbs. (108 N-m)
* Minimum recommended torque regardless of gas ket ma te -
ri als. Some gasket materials may require higher bolt torques
to obtain adequate seal.
Gasket ma te ri al may take a “set” with time; a re check of
torques should be made if the unit has been stored on the
shelf for over 30 days.