17
381497 USA 10-2014
APV
12. Place the plastic star (item 31) against the impeller (Fig. 10).
13. Fit the pump/screw housing and fasten with the clamp ring. See
"Required torques for housing clamp" table on page 18.
14. Push the shaft forward until the impeller is touching the plastic star.
See Fig. 10.
15. Apply "Never-Seez" or equivalent to the screw threads. Tighten the
shaft screws. Remember to use the proper tightening torque for
the screws:
M8: 22 lb·ft (30 Nm) (uses 6mm Allen wrench)
M10: 41 lb·ft (55 Nm) (uses 8mm Allen wrench)
16. Remove the star by pulling it out through the inlet.
17. Replace the temporary nut with the air screw.
Remember to use the proper tightening torque:
M14: 52 lb·ft (70 Nm)
M20: 148 lb·ft (200 Nm)
18. Press the front cover in and fasten the clamp ring. Reassemble the
re-circulation connection, if fitted.
5.4 Recommended inventory of spare parts
Seal sets
We recommend that you keep both seal kits and service kits for the
Ws+pumps in stock. The seal kit for the Ws+ pump consists of the
wearing parts of the pump, as specified on page 27.
Service kit
The service kit is made up of a number of the main components of the
pump which are not wearing parts, but which you still may have to
replace: shaft, impeller, cap nut and fixing kit.
The table below shows the recommended inventory of spare parts for
normal operation and for specific operating conditions such as:
- 24-hour operation
- Operation with abrasive media
- Processes sensitive to production down time.
Wearing parts (seal kit, see page 27)
Service parts (shaft, impeller, air screw page 23; fixing kit page 25)
5. Maintenance
Normal operation
Special needs
0-5 5-20 > 20
No. of pumps in service
2 3 1
3
6 2
Sets Sets Sets/ 10 pumps
Normal operation
Special needs
0-5 5-20 > 20
No. of pumps in service
0 1 1
1 2 1
Sets Sets Sets/ 10 pumps
Impeller
Plastic star
Pump/screw
housing
Fig. 10: Place plastic star against impeller
Fig. 11: Push shaft forward
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