7 Servicing/Maintenance
58 of 72
Sewatec (60 Hz)
914.12
412.34
914.24
135
412.33
230
101
0.0
16
+0
.0
07
9
in
ch
0,4
+0
,2
m
m
Fig. 30:
Fitting the wear plate
1.
Fit wear plate 135 with two new O-rings 412.33/34.
2.
Insert wear plate 135 into pump casing 101.
3.
Fasten wear plate 135 to pump casing 101 with hexagon socket head cap screws
914.12.
4.
Adjust the clearance between impeller 230 and wear plate 135 by tightening
and loosening screws 914.12 and 914.24.
ð
Screw 914.24 pushes the wear plate in the direction of the impeller.
ð
The clearance equals 0.016
+0.0079
inch [0.4
+0.2
mm] (measured on the suction
side from the outer surface of the impeller vane to the wear plate).
5.
Insert the complete back pull-out unit into the pump casing.
6.
Evenly tighten screwed connection 902.01 between pump casing and bearing
bracket.
7.
Fasten the support foot to the baseplate with bolts 901.61 and discs 550.61.
7.5.6 Leak test
After reassembly of the pump, subject the mechanical seal area/lubricant supply
chamber to a leak test.
1.
Tightly screw the testing device into the filler opening (auxiliary connection
13D).
(
ð
Section 5.5, Page 25)
2.
Test medium: compressed air
Test pressure: 11.6 psi (0.8 bar) max.
Test period: 2 minutes
ð
The pressure must not drop during the test period.
ð
If the pressure does drop, check the seals and screwed connections. Then
perform another leak test.
3.
If the test has been successful, fill in the lubricant.
7.5.7 Mounting the motor
NOTE
Steps 1 and 2 do not apply to versions with spacer-type coupling.
1.
Shift the motor to connect it to the pump via the coupling.
2.
Fasten the motor to the baseplate.
