cashco 1000HP Handbuch für Installation, Betrieb und Wartung - Seite 7
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3. Follow procedure "Sub-Section B., Di a phragm
Re place ment" to the point of removing
diaphragm(s) (20), Step 13. Remove
di a phragm gasket (19) and pusher plate stud
gasket (12). Obtain a flat 12" x 1-1/2" x 1/4"
(15 mm x 40 mm x 6 mm) plate bar with a
3/4" (20 mm) hole drilled in the center. "Hook"
the pusher plate stud (13) into the rocker arm
(14) prongs properly. Pull firmly up on the
pusher plate stud (13) to ensure that all slack
is removed from the mechanism and that the
piston (24) is seated firmly. Relax the pulling
and place the flat bar over the pusher plate
stud (13) with the stud (13) passing through the
hole of the bar. Again, pull firmly up to remove
mech a nism slack. One of three po si tions will
be reached:
a. Diaphragm setting too high. Pusher plate
stud (13) will lift the flat bar over 0.020"
(.51 mm).
b. Diaphragm setting acceptable. Bar lifted
between 0.010"–0.020" (.25–.51 mm).
c. Diaphragm setting too low. Bar lifted less
than 0.010" (.25 mm), or failed to be lifted.
4. The castle style stud nut (10) has six locations
per revolution to align the stud nut (10) slots
with the drilled hole through the pusher plate
stud (13). Each stud nut (10) slot represents
a movement up/down of 0.010" (.25 mm).
NOTE: The ideal diaphragm setting is 0.015"
(.4 mm) high. Better performance is usually
7
ob tained when the diaphragm is at this value,
rather than a lower level. As the measuring of
a thou sandths of an inch is difficult with such
a pro ce dure, it is rec om mend ed that the "null"
position be found where the diaphragm(s)
(20) is flush with the body (1) flange (bar
approximately at 0.000"). Remove the pusher
plate stud (13), rotate the stud nut (10) one
or two slots CCW to bring the setting to
0.010–0.020" (.25–.51 mm) high.
5. Place cotter pin (15) through the slot, bend
over ends.
6. Continue reassembly per Sub-Section B,
Di a phragm Replacement, Step 16.
E. Trim Removal and Replacement:
1. Install body (1) horizontally in a vise with the
spring chamber (2) directed upwards, and the
body (1) held at the outlet end.
2. Use a box end wrench, or socket, with a lever
length of at least 24 inches (610 mm), and
place over the hex surfaces of the cylinder
(21). The wrench should be rapped with a
hammer to loosen.
3. Continue to unscrew cylinder (21) until
re moved. The piston (24) and piston collar (23)
should come out by gravity with the cylinder
(21) removal.
CAUTION
Take precautions not to allow the piston (24) to fall
from within the cylinder (21); tip cylinder with hex
end down.
4. If an Option 1000-17 piston spring (30)
is utilized, it also should be removed and
re placed at trim re place ment.
5. Inspect inside surface of cylinder (21) at four
points:
a. Seat (21.2) ring. Check for erosion/
wear on seat ing surfaces. If wear is
ex ces sive, consider utilizing Option
1000-15, stellited seat surface.
b. Seat (21.2). Check for wire drawing
be tween cylinder (21.1) and seat (21.2)
where pressed in. If wear exists here,
an Option 1000-14, integral seat, should
be utilized as a replacement.
IOM-1000HP-Dif fer en tial