7 Servicing/Maintenance
52 of 68
Multitec A SX
ü
Use assembling aids for components made of stainless steel (impellers, drum).
Verify suitability for drinking water applications.
ü
The assembly consisting of suction casing 106.1 or 106.2 with casing wear ring
502.1 and foot (if any) is on hand.
ü
The assembly consisting of shaft 210, half round head grooved pin 561.1 and
shaft nuts 920.5 has been installed.
1.
Fit key 940.1 and suction impeller 231 on the shaft.
2.
Fit the assembly of shaft and suction impeller in suction casing 106.1 or 106.2.
3.
Fit key 940.1.
4.
Mount stage casing 108.1 with diffuser 171.1 and O-ring 412.1 on the shaft.
5.
Fit disc 550.1.
6.
Fit stage impeller 230.1 on the shaft.
7.
Repeat steps 3-6 up to the last impeller.
8.
If an intermediate bearing 540.3 is fitted: The intermediate bearing is located in
diffuser 171.1. Make sure to re-install the stages in the correct order as indicated
by the stage numbers applied during dismantling.
On the 9.2, 10.2, 11.1 and 12.1 hydraulics, impeller 230.3 is the last impeller.
9.
Fit key 940.2, balance drum 59-4 (or spacer sleeve 525.4) and disc 550.3 on the
shaft.
10.
Fit discharge casing 107 (with O-ring 412.1, foot (if any), drum bush 540.1 (if
any) and four studs 902.1).
11.
Insert tie bolts 905 with discs 550.4 and nuts 920.4.
12.
Slightly tighten tie bolts 905.
1
2
3
4
Fig. 20:
Tie bolts —
tightening sequence
13.
Move the pump into horizontal position, setting the pump feet down on a level
surface (e.g. workbench).
14.
Tighten tie bolts 905 in two steps.
First step: tighten to 50 % of tightening torque; second step: tighten to 100 %
of tightening torque.
Observe the tightening sequence given.
15.
Connect balancing line 710.1 (if balance drum is fitted).
7.5.3 Fitting the shaft seal
7.5.3.1 Installing the mechanical seal
For drawings and part numbers refer to the section on the mechanical seal.
Uni-directional mechanical seal
Left-hand spring
Shaft
rotation:
anti-
clockwise
Shaft
rotation:
clockwise
View towards
the primary ring
Right-hand spring
Fig. 21:
Uni-directional spring of mechanical seal
Summary of Contents for Multitec A SX
Page 1: ...Sprinkler Pump Multitec A SX Installation Operating Manual ...
Page 67: ......
