Secure with stud bolts and nuts (keys 24 and 26).
See Torque Specification table for proper torque.
12. Lightly lubricate the spring (key 13) and place on
the inlet plate (key 18).
13. Carefully place the upper actuator casing (key 11)
on the lower actuator casing (key 5). Take care to
match up the alignment marks. Insert the two long
cap screws (key 39) and brackets (key 35) 180°
apart and away from flanges. Place the washers
(key 22) and hex nuts (key 23) on the long cap
screws and evenly tighten. Using proper bolting
techniques, install remaining small cap screws
(key 21), washers and hex nuts. See Torque
Specification table for proper torque.
14. Place travel indicator assembly in the upper
actuator casing (key 11), if present and tighten the
travel indicator fitting (key 56).
Type EZL Travel Indicator Maintenance
A new and improved version of the travel indicator
has been phased in during 2013. The new version
improves the O-ring seal to minimize leakage and
extend service life. The components of the legacy and
new versions are not interchangeable. If maintenance
is performed on the travel indicator, it is recommended
to replace the entire travel indicator assembly with
the new version. Part numbers for the assemblies are
shown in the parts list. Figure 6 shows the difference
between the designs. The spare parts kits will support
either design. Take care to use the correct O-ring
(key 12A or 12B) when performing maintenance, see
parts list for the appropriate part number.
1. Remove plastic travel indicator cover (key 53).
2. Loosen travel indicator bushing (key 55) and remove
it by sliding it over the travel indicator stem (key 54).
3. Remove indicator fitting (key 56) and inspect O-ring
(key 70). Remove O-ring (key 12B) and back-
up rings (key 76). Replace and lubricate O-ring
if damaged. Pull up on the travel indicator stem
(key 54) to force the spring collet (key 57) out of the
diaphragm head groove. Examine these parts and
the stem for wear and replace if necessary.
4. Insert the travel indicator stem (key 54) and spring
collet (key 57) back into the diaphragm head
groove. Replace the indicator fitting (key 56) and
O-ring (key 70) and tighten with a referenced torque
of 20 ft-lbs / 27.1 N•m.
5. Lubricate the O-ring (key 12B) and backup rings
(key 76, 2 required). Place one back-up ring on
the stem (key 54) followed by the O-ring and then
the other back-up ring. Push into groove of the
indicator fitting (key 56).
Slide the travel indicator bushing (key 55) over
the travel indicator stem (key 54) and tighten
firmly in place with a torque of 3.7 ft-lbs / 5.0 N•m.
6. Replace the travel indicator cover (key 53) and
tighten firmly in place.
Pilot Maintenance
Types 6352 through 6354M Pilots
Perform this procedure if changing the control spring
for one of a different range or if inspecting, cleaning or
replacing any other pilot parts. Pilot part key numbers
are referenced in Figure 8.
Note
The body (key 1) may remain on the pipe
nipple (key 21, Figure 8 or key 24, Figure 9)
unless the entire pilot is replaced.
1. To gain access to the diaphragm assembly (key 5),
diaphragm limiter (key 23) if used, control spring
(key 6), restriction (key 22), stem guide (key 8)
or spring seat (key 7), remove the closing cap
(key 11), loosen the locknut (key 10) and turn the
adjusting screw (key 9) counter clockwise until
compression is removed from the spring. Remove
the machine screws (key 14) and separate the
body from the spring case (key 2).
2. Inspect the removed parts and replace as
necessary. Make sure the restriction and the
registration hole in the body are free from debris.
After assembly, make sure of the proper control
spring setting according to the Startup section and
re-mark the spring case if necessary.
3. To replace the valve plug (key 4) or bellows
O-ring (key 17), remove the body plug (key 3)
and body plug gasket (key 12). Be careful to
keep the bellows assembly (key 16) from falling
out and possibly getting lost while removing the
valve plug. Inspect the removed parts and replace
as necessary. Make sure the valve plug seating
surfaces are free from debris.
11
Type EZL
