On Friday, 24 February 2017 21:12:47 UTC, ss wrote:
On 24/02/2017 18:42, tabbypurr wrote:

Pressure switch should indeed change between zero & infinity ohms. But it won't switch in 1 or a few seconds in the machine, so could only be cause of your ills if it's early on in the power feed, which it may well be.

I think the pressure switch is ok as I switched terminals and got readings.

I now have the motor out.
If I connect a multi meter would I get continuitity if this was the
issue. The brushes are on the limit with just 4mm left and the gap
between the end of the holder and the motor is approx the same, I cant
get a proper measure for the gap as it is awkward space.

It's unlikely the motor has anything to do with it. The manual will show you the 3 resistance readings you can expect for rotor, field & tacho.


NT