Emerson TARTARINI BM5A Instruction Manual page 10

Type BM5A
7. Replace O-ring (key 115).
8. Check all moving parts, especially nickel plated
surfaces. Replace any that are worn or damaged.
9. Clean all stripped-down parts.
Reassembly
Lubricate all seals with silicone-based lubricant and be
careful not to damage the seals when reassembling.
Reassemble the parts in the reverse order of the
above steps.
As you proceed, make sure that parts move freely and
without too much friction.
In addition:
• Complete reassembly and make sure to tighten all
screws uniformly.
• When reassembling the hub (key 124), make sure
that the pawl of shaft unit (key 121) is facing the
inlet flange (key 100).
• Check that slam-shut sleeve (key 117) opens when
shaft unit (key 121) is rotated counterclockwise.
• Before reassembling the slam-shut controller, make
sure that the pawl of shaft unit (key 121) is against
the sleeve (key 117). Ensure that the slam-shut
actuator is correctly mounted.
• After reassembling check if all parts are properly
functioning. Check the valve with suds to ensure
that there are no leaks.
• Reinstall slam shut valve on the line and reestablish
all connections.
Slam-Shut Controller (See Figure 8)
▲
Only a qualified person may perform
maintenance procedures. If necessary,
contact our local Sales Office
for assistance.
Before proceeding with any
maintenance work, disconnect impulse
connection (A) to release pressure
inside the slam-shut controller.
After maintenance operation, check the
tightness of the connections with suds.
10
WARNING
Routine slam-shut controller maintenance
entails periodic checking of the diaphragm on
the Type OS/80X (the piston Gaco flex on the
Type OS/84X) and the movement of the levers (the
levers should move freely with minimum friction). If
necessary, lubricate pins with silicone-based lubricant.
Disassembly
1. Remove screws (key 40) and casing (key 47).
2. Remove dowels (key 12) and bushing (key 13).
3. Slide off stem (key 6), lever assembly (keys 17
and 2), balls (key 10) or rollers for Type OS/80X-R
and shim ring (key 15). Wash parts, replace any
if worn-out.
4. Remove nuts (key 18), levers (keys 20 and 36)
and springs (keys 37 and 21).
5. Remove nut (key 30), screw (key 29) and lever
(key 33).
6. Remove minimum (UPSO) adjusting screw
(key 49), maximum (OPSO) adjusting nut (key 50)
and springs (keys 53 and 54).
7. Remove cover (key 61) on OS/80X Series or plug
on Types OS/84X and OS/88X, and proceed as
directed in replacing diaphragm/O-ring section.
8. Remove nut (key 70) and locknut (key 69), then
slide off stem unit (key 57).
9. Loosen screw (key 3), unscrew nut (key 9),
remove balls holder (key 5) and check seals
(keys 4 and 8) for wear.
10. Clean all removed parts. Replace any that are
worn or damaged.
Replacing Diaphragm (OS/80X Series only)
1. Remove screws (key 27) and cover (key 61).
2. Replace diaphragm (key 62).
3. To remount diaphragm, coat it with grease, set
it in place around the edge of cover (key 61)
and evenly tighten screws (key 27) to ensure
proper sealing.