SPX FLOW Johnson Pump CombiProLine OH3, Instruction Manual, Page: 35 / 67

CRL/EN (1810) 2.2
Disassembly and assembly 33
CombiProLine
2 Unlock the set screw (0155) that lock up the impeller wear ring (0150) on the
impeller.
3 Unlock the set screw (0135) that lock up the casing wear ring (0130) on the impeller.
4 Measure the thickness (d) and the width (b) of the ring, see figure 5 A.
5 Make a centre hole in the middle of the edge of the ring at two opposite points, see
figure 5 B.
6 Use a drill with a diameter just a little bit smaller than the thickness (d) of the ring and
drill two holes in the ring, see figure 5 C. Don't drill deeper than the width (b) of the
ring. Take care not to damage the fitting edges of the pump casing and impeller.
7 Use a chisel to cut the remaining part of the ring thickness. Now you can remove the
ring in two parts from the pump casing, see figure 5 D.
8 Clean the pump casing and impeller and carefully remove all bore dust and metal
splinters.
7.7.4 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 6).
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!
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Whenever an impeller has new wear rings fitted it must be dynamically
balanced before being reassembled!
Figure 6: Locking the wear ring.