Grundfos LSV Serie Montage- Und Betriebsanleitung Seite 21

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.
Every • Visually check for leaks.
week
• Check for vibrations.
• Hand test the bearing housing for
any signs of temperature rise.
• Check correct leaking from the
stuffing boxes, approximately 40-60
drops per minute.
Every • Check the pump bearing
month temperature.
Every 6 • Check the shaft for scores.
months
• Check the alignment of the pump
and motor.
• Check the fixing bolts and tighten, if
necessary.
• Check the coupling for wear.
Every • Check whether the grease in the
year pump bearings has hardened.
• Check the rotating assembly for
wear.
• Check the wear ring clearances.
CAUTION
Sharp element
Minor or moderate personal
injury
- Wear protective gloves to
Between the regular maintenance inspections, be
aware of signs of motor or pump problems.
Common symptoms are listed in section
finding the product.
Remedy any fault immediately and avoid costly
repairs and shutdowns.
protect yourself against
sharp edges on the
impeller and wear rings.
8. Fault
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:
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
below.
Do not overgrease.
Too much grease can cause overheating
and premature bearing failure.
Grease quantity [g]
11
17
25
50
60
70
100
130
Ball-bearing grease
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