Edwards nES Series, Инструкция по эксплуатации, Страница: 44 / 56

7.3 Oil and oil filter change
WARNING: OIL CONTAMINATION
Risk of damage to equipment. Always apply all relevant safety precautions. Refer to
Safety precautions during maintenance or repair on page 10.
Always drain the oil at all drain points. Used oil left in the pump can contaminate the
oil system and can shorten the lifetime of the new oil.
Never mix lubricants of different brands or types as they may not be compatible and
the oil mix will have inferior properties.
If the oil is replaced, replace the oil filter (if applicable) and exhaust filters too.
7.3.1 Oil change procedure
1. If the pump is cold run the pump with closed suction inlet for approximately
10 minutes to warm up the oil.
2. Stop the pump and disconnect it from the mains.
3. Remove the oil filler plug.
4. Open the oil drain valve and drain the oil completely into a container large enough
to hold all the oil and tilt the pump slightly (if possible).
5. Close the oil drain valve and fill with new oil via the filler plug up to the middle of
the oil sight glass. The oil level may not exceed the allowed maximum level.
6. Close the oil filler plug.
7. Wipe off any oil spills from the pump and the floor.
8. Connect to the mains supply again and verify the correct rotation direction of the
pump.
9. Run the pump with a closed inlet for a few minutes, stop the pump and check the
oil level. Top up if necessary.
7.3.2 Oil type change
To prevent the oil dissolving residual oil sludge (and hence blocking channels), strictly
follow the following procedure:
1. Drain the used oil completely (tilt the pump slightly if possible).
2. Clean the inside of the exhaust filter housing thoroughly with a clean dry cloth or
other suitable cleaning material.
3. Change the oil filter but leave the existing exhaust filters inside the housing.
4. Fill the pump with the correct amount of new synthetic oil.
5. Run the pump for approximately 2 hours, then stop it. Drain the oil, clean inside as
before and change the oil filter again.
6. Refill with new oil and change the exhaust filters. Repeat this procedure until the
oil appears clean through the sight glass.
Page 40 - 07/2020
A35104880_B - Adjustments and servicing procedures