PSA for those who are unaware: vacuum pumps should never be stored on their sides. Noticed the resins pump misplaced on the second tier of shelving, on its side.
If you peruse the attached image you will notice some oil in the hose? Oil should not be in hose. I am not sure on next steps to clean up this issue but I can only assume the entire pump needs to be torn down and oil cleaned up safely from the airline before it can be put to use again.
@LAndras,
From googling oil in the charging line seems like a common and non major issue. The fix suggested in many cases is to clean out the oil in the charging line and refill the oil on the pump to proper level. No major internal repairs needed. This can also happen from the pump being turned off while under vacuum in some examples.
It’s a Rotary Vane pump, The vanes are inside a cartridge if wou will. That cartridge is attached to the back of the wall of the pump. The surrounding enclosure on the exterior is the sump that the oil sits in. By all accounts it should be fine as long as resin hasn’t made its way into the pump.
Looks like the older smaller of the two. The other one has the line disconnect (not hose clamp) and is usually unscrewed from the pump when not in use.
I know on some pumps, starting with too much oil in the inlet can cause vanes to break, and not all pumps have vanes available for replacement. I would still consider getting as much oil out of the inlet as possible, and if the fan bolt can be accessed and normal rotation derermined, give it several gentile turns by hand before starting.
-LONG-
This type of pump is a rotary vane pump and it’s vanes are lubricated with this oil. The oil has likely seeped past the seals since it is turned over and is now filling the input side of the pump since this is not a precision pump. This situation is not dire so don’t try to tear the pump down. Set it upright, unplug it, and let it set overnight. This oil should flow back into the pump. DON’T turn it on with this oil in the system. It will try to compress the oil and something will break (likely the vanes) or best case it will lock up. If the oil doesn’t flow back into the pump then drain & capture all the oil possible out of the hose and the pump input. Put the drained oil back into the pump by screwing off the large black ‘knob’ (actually exhaust port) and and pouring in the oil. If possible quickly ‘bump’ start the pump to see if enough oil has been drained. If the pump stalls immediately then drain more oil. If the pump seems to turn ‘ok’ then let it run for a bit to clear out any excess oil.
If there is a real issue with the pump even if it seems ‘ok’, then it will not pump down properly.
BTW this is just a cheap Chinese pump and their not made that well.
Corvette1979
