Type EZL
12
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 tting (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 tting (key 56) and
O-ring (key 70) and tighten with a referenced torque
of 3.7 ft-lbs / 5 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 tting (key 56).
6. Slide the travel indicator bushing (key 55) over
the travel indicator stem (key 54) and tighten
rmly in place.
7. Replace the travel indicator cover (key 53) and
tighten rmly 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.
57
12B
LEGACY TRAVEL INDICATOR DETAIL IMPROVED TRAVEL INDICATOR DETAIL
TOP VIEW TOP VIEW
L1
12A
L1
L1
L1
S1
S1
55
53
55
54
56
76
55
53
54
55
56
70
70
57
Figure 6. Travel Indicator Assembly Drawings
APPLY LUBRICANT (L) OR SEALANT (S)
(1)
L1 = LITHIUM HYDROXYSTEGRATE NLGI 2 GRADE GREASE
S1 = ANAEROBIC METHACRYLATE SEALANT FOR NUTS AND BOLTS
1. Lubricant and sealant must be selected such that they meet the temperature requirements.
P1765
(32 strony)
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