DAB FX Series, Instruction For Installation And Maintenance

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ENGLISH
16
3. Denomination and reference number of the spare parts.
4. Required number of parts.
8.1 Routine maintenance
Pumps running normal operation should be inspected every 3000 operating hours or at least once a year. If the pumped liquid is very
muddy or sandy, inspect the pump at shorter intervals.
Check the following points:
•
Power consumption
See pump nameplate.
• Oil level and oil condition
When the pump is new or after replacement of the shaft seal, check the oil level and water content after one week of operation. If there is
more than 20 % extra liquid (water) in the oil chamber, the shaft seal is defective. The oil should be changed after 3000 operating hours
or once a year.
• Cable entry
Make sure that the cable entry is watertight (visual inspection) and that the cable is not sharply bent and/or pinched.
•
Pump parts
Check impeller, pump housing, etc. for possible wear. Replace defective parts.
• Ball 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 done by
an assistance workshop authorised by DAB Pumps.
The ball bearings used are sealed and lubricated, using a special lubricant for high temperatures (-40°C + 150°C).
Defective bearings may reduce the Ex safety.
The bearings must be replaced every 10.000 hours.
•
O-rings and similar parts
During service/replacement, it must be ensured that the grooves for the O-rings as well as the seal faces have been cleaned before the
new parts are fitted.
Used rubber parts must not be reused.
•
Oil change (Fig.8)
After 3000 operating hours or once a year, change the oil in the oil chamber as described below.
If the shaft seal has been replaced, the oil must be changed.
When loosening the screws of the oil chamber, note that pressure may have built up in the chamber. Do not remove
the screws until the pressure has been fully relieved.
•
Draining of oil
1. Place the pump on a plane surface with one oil screw pointing downwards.
2. Place a suitable container (approx. 1 litre), for instance made of transparent plastic material, under the oil screw.
Used oil must be disposed of in accordance with local regulations.
3. Remove the lower oil screw.
4. Remove the upper oil screw. If the pump has been in operation for a long period of time, if the oil is drained off shortly after the
pump has been stopped, and if the oil is greyish white like milk, it contains water. If the oil contains more than 20 % water, it is an
indication that the shaft seal is defective and must be replaced. If the shaft seal is not replaced, the motor will be damaged. If the
quantity of oil is smaller than the quantity stated, the shaft seal is defective.
5. Clean the faces for the gaskets for oil screws.
•
Filling with oil
1. Rotate the pump so that one of the two oil holes in a vertical position facing upwards.
2. Pour the oil into the chamber. The suitable amount of oil is indicated by the second oil venting hole (positioned beside the vertical
filling hole). Once the oil has reached and escapes from the hole at the side, the oil quantity is correct.
3. Fit the oil screws with new gaskets.
The table shows the quantity of oil in the oil chamber of FX RANGE pumps. Oil type: ESSO MARCOL 152.
Motor type
2poles >= 1.5kw 2poles
<= 1.1kw
4poles
NoAtex 0.68 [l] 0.58 [l] 0.65 [l]
Atex 0.75 [l] 0.65 [l] 0.72 [l]