SPX Johnson Pump CombiPrime V, Instruction Manual

Page: 48 / 86

CV/EN (1009) 5.3
Disassembly and assembly 47
CombiPrime V
7.10 Adjustment of the axial play
After repairs to the pump, the axial play of the pump wheel has to be adjusted. This play
has to be equal on both sides. This adjustment can be done in the following way, see
figure 19:
1 Loosen the set screws (1930).
2 Tighten the Allen screws (2810) crosswise. The bearing holder (2240) with the
bearing, pump shaft and pump wheel is shifting to the left. Turn the pump shaft by
hand whilst tightening the screws. Tighten the Allen screws until you feel that the
pump wheel starts to drag.
3 Screw the set screws (1930) sofar into the bearing holder (2240) until they are just
touching the bearing bracket.
4 Loosen the Allen screws (2810) again.
5 Re-tighten the set screws (1930) crosswise, whilst turning the pump shaft by hand.
Count the number of turns you can give the set screws until the pump wheel starts to
turn.
6 Then loosen the set screws again by half of the number of tightening turns.
7 Now tighten the Allen screws (2810) crosswise.
8 Check whether all 4 set screws are properly tightened.
9 Check whether the pump shaft can easily be turned.
➢
If you wish you can use a clock gauge instead of counting the number of tightening
turns of the screws. Determine the position of the shaft end in the two extreme positions
of the shaft. Then adjust the shaft end right in the middle of the measured values.
Figure 19: Adjustment of the axial play.