It was decided to carry out intermediate service as it was almost due, all o-rings etc changed. During start up again during calibration of water bowl was leaking and no pt4/pt5 pressure, water coming through sludge port. We tried manually closing the bowl, as per operating instructions. Opening sv15 for 5 seconds (p244), waiting 15 seconds and opening sv16 for 15 seconds. During this quite a lot of water was leaking from the sludge port. We attempted to supply displacement water which immediately could be seen in the sludge port.
Nothing can be seen coming from v5 valve drain line to sludge port.
since then purifier has been opened a few times and the following carried out with no luck:
- Water block changed with new one: orifices blown with air and checked for size with other purifier.
- Water hoses blown with air and found ok testing in to bucket. Water supply to bottom of shaft verified all ok.
- Drain valve on displacement water (pneumatic vale on water block) found not passing.
- Paring tube opened and all passageways clear. Non return valve operating. Arm moving freely under spring.
- Valve plugs orientation correct and firmly in place.
- Water pump at bottom of bowl and discharge slide orientation correct.
- Discharge slide moving freely. Gn paste applied to all sealing surfaces.
- All rectangular rings in place and condition “looks” ok.
- Teflon ring in the hood found depressed and groove forming suggesting bowl has been at least partially closing.
- Axial wobble found ok.
- Belt changed due to stretching of old one.
- Water drain line pt5 and v5 valve removed, cleaned and v5 swapped with known working valve.
- Clean oil outlet line pt4 removed, cleaned, pressure sensors cleaned and gauge verified. V4 valve operating ok. Even closing manual discharge valve after water transducer fully builds no pressure.
- Parameters checked against default valves and other purifiers. All set to default.
Once oil is supplied form bowl you can hear rpm drop and leakage start, oil visible in sludge port. Again no pt4/pt5.
currently bowl is open and i will try to polish all faces with some polishing paper, any suggestions appreciated.