Every
week
• Visually check for leaks.
• Check for vibrations.
• Hand test the bearing housing for
any signs of temperature rise.
• Check if the leakage of the stuffing
box meets the standards, see on
section Startup.
Every
month
Check the pump bearing temperature.
Every 6
months
• Check the alignment of the pump
and motor.
• Check the fixing bolts and tighten, if
necessary.
• Check the coupling for wear.
Every
year
• Check whether the grease in the
pump bearings has hardened.
• Check the shaft for scores.
• Check the rotating assembly for
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 problems.
Common symptoms are listed in section Fault finding
the product.
Remedy any fault immediately and avoid costly
repairs and shutdowns.
Related information
4.4 Startup
8. Fault finding the product
6.3.3
Lubrication
Pump bearings
Re-greaseable bearings are packed with grease at
our factory prior to shipping. The initial filling of
grease is valid for one year or 2,000 hours of normal
operation, whichever occurs first. After that, regular
grease maintenance must be implemented.
We 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.
Grease quantity
Inlet size Grease quantity [g]
DN 65 to DN 100 11
DN 125 to DN 150 17
DN 200 to DN 300 25
DN 350 to DN 450 50
1. Remove four cap screws and bearing cap to
access to the bearing.
2. Clean up the old grease thoroughly on the bearing
with a clean cloth.
3. Re-pack the bearing with sufficient grease to
completely fill and cover the balls inside the
bearing.
4. Rotate the pump shaft to ensure even and
complete lubrication.
5. For drive end bearing maintenance, loose and
slide the bearing cap to leave enough space, then
visually inspect the bearing for grease.
6. Proceed from step 1 to step 4. If you cannot
access to the bearing by moving the bearing
cap, you need to remove the coupling hub.
7. Install the bearing caps back when the lubrication
is done.
Grease specifications: See Ball bearing
grease below.
Do not overgrease.
Too much grease can cause overheating
and premature bearing failure.
The bearing manufacturers recommend to
fill up 1/3 of the bearing with grease. After
filling the grease, rotate the pump shaft so
the grease will cover the balls in the
bearing.
35
English (GB)
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