GB
Form no.: L453147GB– revision 06/2013
7.
Service and maintenance
13.
Place the plastic star against the impeller. Fig. 10.
14.
Fit the pump/screw housing and fasten with the clamp ring.
15.
Push the shaft forward until the impeller is touching the plastic star.
See Fig. 11.
16.
Tighten the shaft screws (item 11).
Remember to use the proper tightening torque:
M8:
30 Nm (22 ft-lb)
M10:
55 Nm (41 ft-lb)
M12:
80 Nm (59 ft-lb)
M16:
180 Nm (132 ft-lb)
17.
Remove the star by pulling it out through the inlet.
7.4
Recommended inventory of spare parts
Seal kits
The seal kit for the W+ pump consists of the wear parts for the
pump as specified in the spare parts list.
Number of pumps in service
0–5
5–20
>20
Seal kits
number
number
kits/10
pumps
Normal operation
2
3
1
Special needs
3
6
2
Service kits
The service kit consists of several main pump components which
are not considered wear parts but may nevertheless need to be
replaced: the shaft, impeller, cap nut and fixing kit.
Number of pumps in service
0–5
5–20
>20
Service kits
number
number
kits/10
pumps
Normal operation
0
1
1
Special needs
1
2
1
Fig. 10
Impeller
Plastic star
Pump body
Fig. 11
14
APV
