Parts Ordering - Emerson Fisher Accu-Pressure Y693 Instruction Manual

2. Remove the hex nuts (key 22), cap screws
(key 21) and spring case (key 23).
3. Remove the diaphragm assembly (key 5) plus
attached parts by tilting them so that the pusher
post (key 8) slips off the lever assembly (key 9). To
separate the diaphragm (key 5) from the attached
parts, unscrew the spring holder cap screw (key 30)
from the pusher post (key 8).
4. Inspect the pusher post and replace if required.
5. Inspect the lower spring seat (key 4), lower
diaphragm head (key 6) and the lower diaphragm
head gasket (key 7) and replace if necessary.
6. To replace the lever assembly (key 9), remove
the machine screws (key 11). To replace the valve
stem (key 13), unscrew the union nut (key 19) from
the body (key 28) and remove the lower casing
assembly (key 20) and split ring (key 17). Pull
the valve stem (key 13) out of the lower casing
assembly (key 20).
7. To inspect the body bushing (key 97), remove the
bushing snap ring (key 74) and carefully remove
the body bushing from the lower casing assembly
(key 20).
8. During the assembly procedure, use lubricants
indicated parts (Figure 5) and replace parts
as required.
9. Install the body bushing O-ring (key 64) on the body
bushing (key 97). To install the wiper (key 66), place
a small swab of lubricant into the body bushing
to hold the wiper in place while the bushing is
installed into the lower casing assembly (key 20).
Ensure that the wiper is properly oriented with the
wiper lip pointing inward toward the diaphragm.
Install the bushing snap ring (key 74) to hold the
body bushing in place.
10. Apply a moderate coating of lubricant to the valve
stem (key 13). Install the stem O-ring (key 15) and
the two back-up rings (key 69, one on each side of
the O-ring) onto the valve stem (key 13).
11. Install the valve stem (key 13) from the body side
of the bushing, this is to ensure that the O-ring
groove does not damage the wiper.
12. Install the lever assembly (key 9) into the stem
(key 13) and secure the lever assembly (key 9) with
the machine screws (key 11). Carefully tighten the
machine screws to a torque of 2 to 3 ft-lbs / 3 to
4 N•m.
13. Always use a new lower diaphragm plate gasket
(key 31). Install the parts on the pusher post in the
order listed below:
• Lower diaphragm plate gasket (key 7)
• Lower diaphragm plate (key 6)
• Diaphragm and plate assembly (key 5) pattern
side up
• Lower spring seat (key 4)
14. Lubricate the diaphragm cap screw threads
(key 30) and insert the cap screw to secure the
diaphragm parts to the pusher post (key 8).
Carefully tighten to a torque of 7 to 9 ft-lbs / 9 to
12 N•m.
15. Install the assembled parts in the lower casing
(key 20). Make sure that the lever (key 9) fits in
the pusher post (key 8) and that the holes in the
diaphragm align with the holes in the lower casing.
16. Install the spring case (key 23) on the lower casing
assembly (key 20) so that the vent assembly
(key 56) is correctly oriented, and secure with the
cap screws (key 21) and hex nuts (key 22) finger
tight only.
17. Insert the control spring (key 1) into the spring
case (key 23), followed by the upper spring seat
(key 4 or 44) and adjusting screw (key 2).
18. Turn the adjusting screw (key 2) clockwise until
there is enough control spring (key 1) force to
provide proper slack to the diaphragm (key 5).
Using a crisscross pattern, finish tightening the cap
screws (key 21) and hex nuts (key 22) to 18 to
21 ft-lbs / 24 to 28 N•m of torque. To adjust the
outlet pressure to the desired setting, refer to the
Startup and Adjustment section.
19. Install a replacement closing cap gasket (key 35) if
necessary, and then install the closing cap (key 3).
20. Connect the downstream control line and refer to
the Startup section before putting the regulator
back in operation.

Parts Ordering

When contacting your local Sales Office about this
regulator, include the type number and all other
pertinent information stamped on the nameplate.
Type Y693
7