Robinair Vacuum Pump
Anyone have a 6cfm Robinair Cooltech vacuum pump (15600) that you can still read the label on the motor?
I had mine running for a couple hours in the garage on a dehumidifier and I came back and it had shut off and was too hot to touch. I thought it may have locked up or broke a vane.
I dismantled it and the motor was fine - sleeve bearings are fine, shaft is fine, windings look fine, centrifugal switch, start cap - everything. Megohmed it and was fine. Checked the pump end of it and everything was fine. Vanes are in good shape, no sign of debris in the oil. Spins free.
I'm not exactly sure what happened. I checked amp draw on the motor and it between 5.5 and 5.7 amps. My label is worn off. Can anyone still read their label and let me know if that is within the FLA of the motor?
I shot the motor with the IR thermometer when I found it and it was at 200*F. Most of the heat was in the front half the motor. Pump and rear of motor was about 165*F.
It smelled like oil smoke when I found it.
I put it all back together and it ran for an hour. Sort of a mystery....
I have that same pump, amp draw is rated at 6.6 amps
Thanks! That checks out as well then.... I'm not sure what happened then.
Originally Posted by ramboskie