Maintenance; Lubrication; Filters; Periodic Checks - Grundfos CRK Series Installation And Operating Instructions Manual

8. Maintenance

Before starting work on the pump, make
sure that all power supplies to the pump
have been switched off and that they can-
not be accidentally switched on.
Pumps installed in accordance with these instruc-
tions require very little maintenance.

8.1 Lubrication

The mechanical shaft seal is self-adjusting and has
wear-resistant seal rings which are lubricated and
cooled by the pumped liquid.
The pump bearings are also lubricated by the
pumped liquid. The motor ball bearings are grease
packed and sealed for life. No further lubrication is
necessary.
Pumps from 4 kW and up have angular contact bear-
ings.
If the pump is to be drained for a long period of inac-
tivity, remove one of the coupling guards to inject a
few drops of silicone oil on the shaft between the
pump head and the coupling. This will prevent the
shaft seal faces from sticking.
Motor bearings:
Motors which are not fitted with grease nipples are
maintenance-free.
Motors fitted with grease nipples should be lubri-
cated with a high-temperature lithium-based grease,
see the instructions on the fan cover.

8.2 Filters

Chip trays, filters, etc. should be cleaned at regular
intervals to ensure a correct flow of liquid.

8.3 Periodic checks

At regular intervals, depending on the conditions and
time of operation, the following checks should be
made:
• Check the quantity of liquid and operating pres-
sure.
• Check that there are no leaks.
• Check that the motor is not overheating.
• Check the tripping of the motor starter.
• Check that all controls are operating satisfactorily.
If the above checks do not reveal any abnormal op-
erating details, no further checks are necessary.
Should any faults be found, check the symptoms
with section 12. Fault finding chart.

9. Service

Note: If a pump has been used for a liquid which is
injurious to health or toxic, the pump will be classi-
fied as contaminated.
If Grundfos is requested to service the pump, Grund-
fos 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.
8
Possible costs of returning the pump are paid by the
customer.
However, any application for service (no matter to
whom it may be made) must include details about
the pumped liquid if the pump has been used for liq-
uids which are injurious to health or toxic.

9.1 Service kits

Service kits for CRK and MTR, see
www.Grundfos.com (WebGOLD), WinCAPS or
Service Kit Catalogue.

9.2 Coupling adjustment

For adjustment of coupling in CRK and MTR
1s to 20, see fig. F, page 77.
For adjustment of coupling in MTR 32, 45, 64,
see fig. G, page 78.

10. Sound pressure level

Motor
[kW]
50 Hz
0.37 <70
0.55 <70
0.75 <70
1.1 <70
1.5 <70
2.2 <70
3.0 <70
4.0
5.5
7.5
11
15
18.5
22
30

11. Disposal

Disposal of this product must be carried out accord-
ing to the following guidelines:
1. Use the local public or private waste collection
service.
2. In case such waste collection service does not
exist or cannot handle the materials used in the
product, please deliver the product or any haz-
ardous materials from it to your nearest Grundfos
company or service workshop.
L [dB(A)]
pA
60 Hz
<70
<70
<70
<70
71
71
71
73 71
73 78
73 78
80 84
72 77
72 77
70 75
70 84