Munsch NPC Series - Disassembling a Casing Cover with; MUNSCH-REA-C Mechanical Seal; Disassembling the Atmosphere-Side; Stationary Seal Ring

Maintenance
7.3.6 Disassembling a casing cover with
MUNSCH-REA-C mechanical seal
471
412.6
473
474.1
412.3
412.2
161
523.6
412.5
475
472
412.61
477
474.2
400.10
Fig. 20 Disassembling a casing cover with
MUNSCH-R EA-C mechanical seal
1. Extract rotating seal ring 472 with shaft sleeve 523.6 from
pump shaft 211. Free the rotating seal ring from the shaft
sleeve.
2. Remove casing cover 161 and put it down with seal cover
471 facing down.
3. Remove gasket 400.10 from casing cover 161 and replace
gasket if necessary.
4. Extract stationary seal ring 475.
5. Turn the casing cover upside down.
6. Loosen and unscrew seal cover 471 using an adjustable
pin wrench.
7. Remove spring 477 and thru st ring 474.2.
8. Unscrew stationary seal ring holder 473 using the special
tool.
9. Remove thrust ring 474.1.
10. Remove and replace O-rings 412.61, 412.5, 412.2, 412.6,
412.3.
7.3.7 Disassembling the atmosphere-side
stationary seal ring
Only for MUNSCH-REA-C/D double mechanical seal.
412.45
475.2
523.5
477.2
412.9
473.2
412.52
472.2
Fig. 21 Disassembling MUNSCH-REA-D station-
ary seal ring
1. Remove rotating seal ring 472.2 and shaft sleeve 523.5.
2. Remove stationary seal ring holder 473.2.
3. Extract stationary seal ring 475.2 from the stationary seal
ring holder.
4. Remove spring 477. 2 .
5. Remove and replace O-rings 412.52, 412.45, 412.9.
28 NPC series BA-2005.07 EN – 02