Travel Indicator Assembly Maintenance - Fisher EZR Instruction Manual

Type EZR
W7394
2. Remove the flanged locknut (key 13) from
the bottom plug (key 11). This loosens the
entire assembly.
On NPS 1, 1-1/4 x 1, and 2 x 1 (DN 25, 32 x
25, and 50 x 25) bodies, remove the socket
head screw (key 129) and lock washer
(key 130) from the bottom plug.
3. Remove the bottom plug (key 11) and the bottom
plug O-ring (key 10).
4. Remove the diaphragm (key 9).
5. Remove the top plug O-rings (keys 14 and 70).
6. Check all components for damage or wear and
replace as necessary.
7. When reassembling, be sure to lubricate all
O-rings before installing.
8. Hold the top plug (key 5). Place the parts on the
top plug in the following order:
• O-ring (key 14)
• O-ring (key 70)
• Diaphragm (key 9)
• O-ring (key10)
• Bottom Plug (key 11)
• Flanged Locknut (key 13)
9. Reassemble in the reverse order. Tighten flange
locknut (key 13) to proper torque (see Table 13).

Travel Indicator Assembly Maintenance

Travel indicator assembly key numbers are referenced
in Figures 10, 14, and 18. The indicator assembly
can be removed and installed without removing the
bonnet (key 2) from the body (key 1). Travel indicator
maintenance is performed for two reasons:
a. When damaged or worn parts need replacing.
b. When travel indicator is removed and replaced
with a travel indicator plug assembly.
18
BOTTOM PLUG
(KEY 11)
FLANGED
LOCKNUT
(KEY 13)
O-RING
(KEY 10)
Figure 9. Diaphragm and Plug Assembly Components
Note
DIAPhRAGM
(KEY 9)
O-RING TOP PLUG
(KEY 70)
WARnInG
!
Avoid personal injury or damage
to property from sudden release
of pressure or uncontrolled gas or
other process fluid. Before starting
to disassemble, carefully release all
pressures according to the shutdown
procedure. Use gauges to monitor inlet,
loading, and outlet pressures while
releasing these pressures.
1. Remove the indicator protector (key 22, Figure 14)
and indicator cover (key 21).
2. Remove the first hex nut (key 4) and the indicator
washer (key 20).
3. Unscrew the second hex nut (key 4) on the top of
the indicator stem (key 15). Do not remove.
4. Use a wrench to remove indicator fitting (key 19).
5. Lift out travel indicator assembly. If replacing travel
indicator with travel indicator plug, skip to step 9.
6. Compress the main spring (key 12). Remove the
second hex nut (key 4). Parts will separate easily
when the hex nut is removed.
7. Slide the indicator stem (key 15) out of the
indicator fitting (key 19). The main spring (key 12)
and upper spring seat (key 17) will be free.
8. If necessary, use the indicator stem (key 15) to
pry the back-up rings (key 16) and O-ring (key 18)
out of the indicator fitting (key 19).
9. Check the indicator fitting O-ring (key 6).
Lubricate and replace if necessary.
10. To replace travel indicator parts, lubricate all
O-rings, back-up rings, and threads. To
reassemble, hold the indicator stem (key 15) and
place the parts on the stem in the following order
(see Figure 10).
O-RING
(KEY 14)
(KEY 5)