Motor; Service; Adjusting The Shaft - Grundfos TP Serie Instrucciones De Instalación Y Funcionamiento

8.2 Motor

Check the motor at regular intervals. It is important
to keep the motor clean in order to ensure adequate
ventilation. If the pump is installed in a dusty
environment, both pump and motor must be cleaned
and checked regularly.
Lubrication
The bearings of motors up to 11 kW are greased for
life and require no lubrication.
The bearings of motors of 11 kW and up must be
greased in accordance with the indications on the
motor nameplate.
Lubricate the motor with a lithium-based,
high-temperature grease.
• The technical specification of the grease must
correspond to DIN 51825, K3N, or better.
• The viscosity of the basic oil must be higher than
2
50 cSt (mm /s) at 40 °C (104 °F) and 8 cSt
2
(mm /s) at 100 °C (212 °F).
• The grease filling rate must be 30-40 %.

8.3 Service

Warning
If the pump has been used for a liquid
which is injurious to health or toxic, the
pump will be classified as contaminated.
If Grundfos is requested to service the pump,
Grundfos must be contacted with details about the
pumped liquid, etc. before the pump is returned for
service. Otherwise Grundfos can refuse to accept
the pump for service.
Possible costs of returning the pump are paid by the
customer.

8.4 Adjusting the shaft

If the motor has been removed during installation or
for repair of the pump, the pump shaft must be
adjusted after the motor has been replaced.
8.4.1 Pumps with two-part coupling
Pumps Series 100 and 200
Make sure that the shaft pin is fitted in the pump
shaft.
Adjust the pump shaft as follows:
1. Remove the coupling guards using a screwdriver.
2. Fit the hexagon socket head screws in the
coupling and leave loose.
3. Raise the coupling and the pump shaft as far as
possible (towards the motor) with a screwdriver
or a similar tool so that the pump and motor
shafts touch each other. See fig. 16.
Fig. 16 Raising the coupling and the pump shaft
4. Tighten the hexagon socket head screws in the
coupling to 5 Nm (0.5 kpm).
5. Check that the gaps either side of the coupling
halves are equal.
6. Tighten the screws two and two (one side at a
time) to the torque stated below. See fig. 17.
Hexagon socket head
screw
M6 x 20
M8 x 25
7. Fit the coupling guards.
Fig. 17 Tightening the screws
8.4.2 Pumps with integral shaft/coupling
For pumps with integral shaft/coupling, we
recommend that you do not remove the motor. If the
motor has been removed, it is necessary to remove
the motor stool in order to refit the motor correctly.
Otherwise the shaft seal may be damaged.
Torque
13 Nm (1.3 kpm)
31 Nm (3.1 kpm)
15