SPX FLOW Johnson Pump CombiProLine OH3, Instruction Manual

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32 Disassembly and assembly
CRL/EN (1810) 2.2
7.7 Replacing the impeller and the wear ring
If the play has risen to 0,9 mm or greater due to wear then both wear rings are replaced.
7.7.1 Disassembling the impeller
1 Remove the Top Pull Out unit, see paragraph 7.5.1 "Disassembling the Top Pull Out
unit OH3" or paragraph 7.6.1 "Disassembly Top Pull Out unit OH5".
2 Unlock the set screw (1825) and remove the cap nut (1820).
3 Remove the impeller (0120) with a pulley puller, or wrest the impeller by inserting for
instance 2 big screwdrivers between the impeller and the pump cover (0110).
4 Remove the impeller key (1860).
7.7.2 Mounting the impeller
1 Place the impeller key (1860) in the key way of the pump shaft.
2 Push the impeller onto the pump shaft.
3 Fit the cap nut. For tightening moment of the nut see paragraph 10.1.2 "Tightening
moments for cap nut".
4 Fit the set screw (1825).
7.7.3 Disassembling the wear rings
After removing the Top Pull Out unit (see paragraph 7.5.1 "Disassembling the Top Pull
Out unit OH3" or paragraph 7.6.1 "Disassembly Top Pull Out unit OH5") the wear rings
can be removed. In most cases the ring has been fixed so tightly that it cannot be
removed undamaged.
1 Disassembling the impeller, see paragraph 7.7.1 "Disassembling the impeller"
Figure 5: Removal of wear ring.
b
d
A B
C D
b
d