Grundfos LSV Montage- Und Betriebsanleitung Seite 27

6.3.2 Frequency of inspections
Carry out inspections in accordance with the
maintenance table below.
Depending on operating and environmental
conditions together with a comparison of previous
inspections, the frequency of inspections may be
altered to maintain satisfactory operation of the pump.
• Visually check for leaks.
• Check for vibrations.
• Hand test the bearing housing for
Every
any sign of temperature rise.
week
• Check correct leaking from the
stuffing boxes (approximately 40-60
drops per minute).
Every • Check the pump bearing
month temperature.
• Check the shaft for scores.
• Check the alignment of the pump
and motor.
Every 6
months
• Check the fixing bolts and tighten, if
necessary.
• Check the coupling for wear.
• Check whether the grease in the
pump bearings has hardened.
Every
• Check the rotating assembly for
year
wear.
• Check the wear ring clearances.
CAUTION
Sharp element
Minor or moderate personal injury
‐
Wear protective gloves to protect
yourself against sharp edges on the
impeller and wear rings.
Between the regular maintenance inspections, be
aware of signs of motor or pump trouble.
Common symptoms are listed in section Fault finding
the product.
Remedy any fault immediately and avoid costly
repairs and shutdowns.
Related information
8. Fault finding the product
6.3.3 Lubrication
Pump bearings
Pump bearings are lubricated before delivery.
We recommend relubricating at intervals of 2000
operating hours. However, depending on duty
conditions, this may vary.
To refill the bearings with fresh grease, follow this
procedure:
Recommend to use the same type of
grease. If need to replace the grease with
a new type, please clean up the old grease
and then add the new grease.
1. Remove the bearing cap.
2. Add enough grease to fill up 1/3 of the ball
bearing.
3. Note the quantity required.
4. Refit the bearing cap.
Grease quantity
Inlet size
DN 65 to DN 100
DN 125 to DN 150
DN 200 to DN 300
DN 350 to DN 450
DN 500
DN 600 to DN 800
DN 1000
DN 1200
Repeat this procedure the first three times. Based on
the first three relubrications, determine the correct
quantity of grease required.
For future relubrications, apply the established
quantity of grease through the lubricating nipples. You
do not have to remove the bearing caps.
For every 10,000 operating hours or every two years:
1. Remove the bearing caps from the pump.
2. Remove old grease.
3. Thoroughly clean the bearing caps.
4. Refill the bearings with fresh grease.
5. Refill the bearing caps completely with fresh
grease.
6. Refit the bearing caps in accordance with the
assembly instructions.
7. Start the pump briefly several times to distribute
the grease in the bearings and to prevent
overheating of the grease.
Grease specifications: See section Ball-bearing
grease below.
Grease quantity [g]
11
17
25
50
60
70
100
130
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