FL Series
10
Inspect the parts for damage or wear, and replace if
necessary.
5. Remove orifice (key 19) and O-ring (key 17).
Inspect the parts for damage or wear, and replace if
necessary. Lightly lubricate the O-ring and place in the
body (key 16). Install the orifice.
6. Set the pad holder (key 22) in the body (key 16).
7. Lightly lubricate the rims of the diaphragm (key 14)
and place it on top of the pad holder (key 22). Set the
diaphragm plate (key 13) on the diaphragm (key 14).
8. Lightly lubricate the O-ring (key 18) and place it in
the lower case (key 21).
9. Place the washer (key 11) and stem nut (key 20)
on the stem (key 23) and tighten.
If also performing
Upper Case Maintenance, skip to step 2 of the Upper
Case Maintenance section.
10. Insert machine screws (key 10) in the lower cover
(key 21) and tighten uniformly to ensure proper seal.
Upper Case Maintenance
1. Disconnect pilot and remove it from the line.
2. Loosen locknut (key 2) and back out adjusting
screw (key 1) until compression is removed from the
spring. Remove cap (key 3).
3. Lift the spring carrier (key 6), spring (key 7), and
O-ring (key 4) out of the upper cover (key 8). Inspect
O-ring and replace if necessary.
4. Remove machine screws (key 10) from lower cover
(key 21) and the separate lower cover from the body
(key 16), unless removed during lower diaphragm
maintenance. Use a wrench to hold stem (key 19)
securely while removing the stem nut (key 26).
5. Remove remaining loose components: washer,
upper diaphragm plate, diaphragm, lower diaphragm
plate, and O-rings (keys 11, 13, 14, 15, 18, and 25).
Inspect diaphragm and O-rings for damage or wear, and
replace if necessary.
6. Lightly lubricate the O-ring (key 25). Place O-ring
over the stem (key 19) and press it down into the body
(key 16).
7. Set the lower diaphragm plate (key 15) into the
body (key 16).
8. Lightly lubricate the rims of the diaphragm (key 14)
and place it in the body (key 16) on top of the lower
diaphragm plate (key 15).
9. Set the upper diaphragm plate (key 13) on top of
the diaphragm (key 14).
10. Place washer (key 11) and stem nut (key 26) on
the stem (key 19) and tighten using a wrench to hold
the stem.
11. Set the spring carrier (key 6).
Damper and Restrictor Maintenance
1. Remove screw (key 31) and plate (key 29).
2. Remove ring nuts (key 30).
3. Remove damper adjusting screw (key 27). Remove
and inspect O-ring (key 28) for damage or wear, and
replace if necessary. Lightly lubricate O-ring before
placing on the adjusting screw. Insert damper adjust-
ing screw into the body (key 16) and tighten. Insert
ring nut (key 30) and tighten. Back out damper
adjusting screw until it stops.
4. Remove restrictor adjusting screw with hole
(key 32). Remove and inspect O-ring (key 28) for
damage or wear, and replace if necessary. Lightly
lubricate O-ring before placing on the adjusting screw.
Insert restrictor adjusting screw into the body (key 16)
and completely tighten. Insert ring nut (key 30) and
completely tighten. Back out restrictor adjusting screw
1/2 turn.
Note
When using a Type PRX/120 pilot with a
Type PRX/125 pilot as a monitor, use the
following settings:
• restrictor - completely tighten and
then back out three full turns.
• damper - back out until it stops.
5. Install plate (key 29) and screw (key 31).
Type SA/2
1. Disconnect pilot supply filter regulator and remove
it from the line.
2. Remove bolts, washers, and nuts (keys 2, 9, and 10)
from body (key 16) and the separate upper and lower
covers (keys 11 and 19) from the body (key 16). When
separating the covers from the body, be aware of loose
components: (keys 1, 3, 4, 8, 12, 18, 20, and 21).
3. Remove and inspect O-ring (key 13) for damage or
wear, and replace if necessary. Lightly lubricate the
O-ring before placing it back in the (key 11).
