Eng
lish (US)
16
13.2.1 Oil level and oil condition
Check the oil level after one month of operation if the pump is
new or the shaft seals have been replaced. The oil should be
changed if it contains water.
Completely pump out the used oil, making sure that the removal
tube goes all the way to the bottom of the oil chamber.
For complete drainage, the pump must be tilted 60 °.
After refilling, tighten the oil plug to torque (59 ft-lb).
13.2.2 Cable entry
Make sure that the cable entry is waterproof and that the cables
are not sharply bent or pinched.
13.2.3 Propeller/impeller clearance
Check the propeller/impeller clearance.
13.2.4 Pump parts
Check the suction and discharge casing, etc. for possible wear.
Replace defective parts.
13.2.5 Bearings
Check the shaft for noisy or heavy operation (turn the shaft by
hand). Replace defective ball bearings.
A general overhaul of the pump is usually required in case of
defective ball bearings or poor motor function. This work must be
carried out by an authorized service workshop.
13.3 Replacing the wear ring, KPL
When the clearance between the propeller blade and the wear
ring exceeds 0.078 in. (20 mm), the wear ring must be replaced.
1. Remove the screws and lift the pump off the suction casing.
2. Replace the wear ring.
3. Assemble the pump in reverse order.
If you have any questions, please contact the nearest Grundfos
or service workshop.
13.4 Replacing the wear ring, KWM
When the clearance between the impeller blade and the wear ring
exceeds 0.078 in. (20 mm), the wear ring must be replaced.
1. Remove the screws and lift the pump off the suction casing.
2. Replace the wear ring.
3. Assemble the pump in reverse order.
If you have any questions, please contact the nearest Grundfos
or service workshop.
Note
Note
If the pump has a WIO sensor, the above
requirement can be ignored
Warning
If there has been leakage through the seal, the oil
chamber may be under pressure.
Always unscrew the oil plug slowly in order to
allow pressure to equalize, and preferably hold a
rag over the inspection cover when unscrewing
the screw to prevent spillage.
Note
Note
Used oil must be disposed of in accordance with
local regulations.
Note
Note
Inspection is recommended after one week of
operation when the pump is new or the shaft
seals have been replaced.
Regular inspection and preventive maintenance
ensure a more reliable operation.
