7 Servicing/Maintenance
59 of 74
HPK-L
1136.8/15-EN
7.5.8 Fitting the back pull-out unit
ü
The notes and steps stated in (
Section 7.5.7, Page 58) been observed/carried out.
ü
For back pull-out units without coupling, fit the coupling in accordance with the
manufacturer's instructions.
1. Carefully insert joint ring 411.10 into volute casing 102.
2. Guide the back pull-out unit into volute casing 102 and tighten nut 920.01.
3. Make sure that the rotor can easily be rotated by hand.
4. Bolt support foot 183 to bearing bracket 330 and to the baseplate.
5. Mount fan hood 832 and fasten it together with guard 680, using hexagon head
bolts 901.84.
6. Insert key 940.02. Fasten the coupling half on the shaft.
7.5.9 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.
4. Connect the motor to the power supply (refer to manufacturer's product
literature).
7.6 Tightening torques
7.6.1 Tightening torques for volute casing/bearing bracket
The threaded connections between volute casing and casing cover (902.01/920.01),
between casing cover and bearing bracket (902.04/920.04) and between bearing
cover and bearing bracket (914.02) as well as the hexagon nut for impeller fastening
920.95 and grub screws 904.32 for fastening the shaft sleeve must be tightened with
a torque wrench. Observe the tightening torques given in the table.
Table 20:
Tightening torques for bolted/screwed connections [Nm]
Item number
Screw/bolt
Material/stamp mark
902.01
902.04
Stud
DIN 939
1.7709+QT / GA
Monix 3K / MM
920.01
920.04
Hexagon nut
ISO 4032
1.7218+QT+A2D / G
Monix 3K / MM (M3K)
Thread
Brand-new
threads
9)
-15 %
10)
-20 %
10)
Brand-new
threads
9)
-15 %
10)
-20 %
10)
M12
80
68
64
130
111
104
M16
190
162
152
320
272
256
M20
330
281
264
620
572
496
9
These values are determined on the basis of a friction coefficient of μ = 0.12.
10
After repeated tightening of the threads and in case of good lubrication the values shall be reduced by 15 to
20 %.
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