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CR/EN (1004) 4.0 Disassembly and assembly 35
CombiPro
7.5.4 Assembling the wear rings
1 Clean and degrease the fitting edge of the pump casing and impeller where the wear
ring is to be mounted.
2 Fit the casing wear ring in the pump casing. Take care it is not pushed out of
alignment!
3 Fit the impeller wear ring on the impeller. Take care it is not pushed out of
alignment!
! Make sure that they are not inserted obliquely!
4 Both wear rings then have to be secured. Drill 3 holes Ø5 mm, 9 mm deep, right on
the seam between impeller and wear ring c.q. pump casing and wear ring.
Subsequently cut screw thread M6 (see figure 11).
5 Fit the set screws (0135 and 0155) in their positions in the impeller and the pump
casing respectively.
! Don’t fasten the set screws too tight, in order to avoid deformation of the wear
rings!
ƽ Whenever an impeller has new wear rings fitted it must be dynamically
balanced before being reassembled!
Figure 11: Locking the wear ring.