7.5.2.2.2 Fitting the cutter
Fig. 29: Fitting the cutter
✓
The pump-end mechanical seal 433.02 has been installed.
1. Slip impeller 230 onto the conical shaft end.
2. Insert grooved pin 561.01 into the impeller and place impeller body 23-7 onto
the centring hub.
3. Screw in impeller screw 914.10 and use a torque wrench to tighten the screw to a
torque of 50 Nm.
4. Fit the pump casing including O-ring 412.15 with hexagon head bolts 901.14. Use
a torque wrench to tighten the bolts to a tightening torque of 60 Nm.
5. Insert O-ring 412.16 in suction cover 162.
6. Fasten ring 500.02 with socket head cap screw 914.07 in the suction cover.
7. Insert the suction cover into the pump casing, making sure the suction cover sits
close to the impeller vanes.
(Make sure that socket head cap screws 914.15 do not protrude from the
threaded holes in the suction cover.)
8. Screw in hexagon head bolt 901.15 to hold the suction cover in place. Do not
tighten the bolt yet.
9. Measure the distance between the pump casing and the suction cover.
Distance S should measure approximately 0.2 ± 0.1 mm.
10. If required, adjust the position of the suction cover with socket head cap screw
914.15 in relation to the pump casing.
11. Tighten hexagon head bolt 901.15 to a torque of 30 Nm.
12. Rotate the impeller body to check that the impeller turns smoothly.
Make sure that the suction cover and impeller do not touch each other.
7.5.2.3 Installing the back pull-out unit
7.5.2.3.1 Design with axial clearance
NOTE
After casing wear rings with a radial clearance have been fitted in pump casing 101, they
have the required inner diameter and do not need to be readjusted.
1. Use a rubber mallet to push casing wear ring 502 into pump casing 101 as far as
it will go.
2. Insert the complete back pull-out unit in the pump casing.
7 Servicing/Maintenance
Amarex KRT
49 of 74
Goodnal STP ST041 Sewage Delivery (Amarex KRT Submersible Motor Pump) Vendor Manual
Q-Pulse Id VM362
Active 29/10/2013
Page 51 of 96
