Going to attempt to change the capacitor on my tumble dryer... Its a 8
micro-Farad one.

I think its dead anyway but I'm assuming I can check with a
multimeter?
What sort of voltage/current is one of these likely to have?

Assuming it is still ' live' how do I discharge it to make it safe?


Does the motor have brushes and a commutator? If so, change the brushes
before you start looking elsewhere, they're seldom expensive and are a
consumable item. Capacitors may or may not last the life of an
appliance
but brushes are certain to wear from day one and are usually the first
suspect in a misfiring/intermittant motor.

With brush type motors, the brushes wear down and consequently less
pressure is applied by the spring, causing a higher resistance/poorer
connection between brush and commutator. An arc is caused, which heats
the
brush and can deform the casing causing the brush to stick, making the
problem increase exponentially. It also causes the commutator to become
blackened which makes matters even worse.

I'd take out the brush carriers and check the brushes move freely and
that
there's plenty of length left on them. Also check the commutator is
clean.

If the motor does not have a brush/commutator arrangement, I'd check
all
connections are secure and check the control board for dry/cracked
solder
joints before suspecting component failure.

Dave
nonsense it is clearly an induction motor.

Yep. It is.

There is a TB regarding capacitors on White Knight TD's, the fault is caused
by the capacitor being affixed too close to the motor, the spare part now
includes a bracket to move it further away. Sometimes even when the part is
replaced the motor subsequently burns out if the windings have been damaged
by a stalled motor.