mobocracy
Active Member
My head system decided it was time for my annual pre-4th of July troubleshooting session by going into “pump never stops running” mode.
Last year I wised up and got a vacuum gauge but never needed to use it.
This year I figured it would be helpful and I checked the vacuum at both the inlet at the vacuum pump and at the head. I’m getting a solid 12 inches of Hg on my gauge in both places. No visible loss of vacuum on the gauge with the pump turned off.
Left for a minute or two, the head flushes real solid, too.
I suspect the vacuum shutoff switch is getting flaky. I can ever so slightly touch it and the pump shuts off and stays off.
But I can’t find a reference number for how much vacuum I should expect to see or what pressure the switch is calibrated to shut off. Does anyone know?
Last year I wised up and got a vacuum gauge but never needed to use it.
This year I figured it would be helpful and I checked the vacuum at both the inlet at the vacuum pump and at the head. I’m getting a solid 12 inches of Hg on my gauge in both places. No visible loss of vacuum on the gauge with the pump turned off.
Left for a minute or two, the head flushes real solid, too.
I suspect the vacuum shutoff switch is getting flaky. I can ever so slightly touch it and the pump shuts off and stays off.
But I can’t find a reference number for how much vacuum I should expect to see or what pressure the switch is calibrated to shut off. Does anyone know?