A good year or so ago I switched on the Myford MG 12 Cylindrical grinder and couldn't get the pump to run in either constant mode or when switched with the work head. At the time I thought that possibly sediment had gotten into the coolant tank and stopped the impeller from turning but never bothered to check it out.

I have some bar that I need to grind down to size and I decided to have a look at it.

I first of al checked all of the fuses inside the control panel, all were good. Then l had to haul the tank out from behind the machine, to do this I had to remove the counterweight that provides the return force for the Wheelhead so that I had room to remove it. Once accessible I checked the tank and found that it was clean (apart from the coolant having a bit of oil on top). I couldn't find anything wrong with it so I took the cover off the pump motor and checked for current when the pump was switched on, there was absolutely no signs of any current getting to the motor.

Question is, where do I look or what do I check next. I'm sure it is a simple fault but it's tracing it that is a problem to me as me and electricity are not good friends, its just something that makes smoke come out of wires.

Any suggestions?