Vintage Electrolux Dishmaid 1960

[rolls_rapide]

I would imagine that any qualified electrician worth his salt would be able to check the motor.

Are you sure that the motor is properly sealed against water penetration from the wash spray?

And is the insulation okay? (There might be a short circuit in the wiring).

You could get an electrical engineer to conduct an insulation test.

 

[74simon]

Grrr!

So annoying when you think you've sussed a repair but it doesn't work!

Richard, the only capacitors I've seen blown are the metal type found in Hoovers - sometimes the ends get blown out, also seen the capacitor can burst at its seam. There's also an electrical smell that lingers, and a sooty discharge round where it blew.

There is probably a centrifugal switch on the motor shaft. When the motor is switched on the switch is in the closed position, and energises a set of secondary windings at a different phase, inducing rotation. Once the motor is up to speed, the switch disengages as momentum keeps the motor going. A stuck switch can damage the secondary windings, maybe that's causing the big bangs?

Have you tried powering it up again? If you do it with the capacitor disconnected, the motor will hum but not turn, but if you give the rack a turn by hand (presuming you can disable the door switch) the motor should start running.

If there's a short somewhere you usually get sparking from the location of the short, was the machine dry both times? Have you been able to poke it with a multimeter at all?

Hope you can get this sorted, sure you will though!

Simon

 

[ricky5050]

thanks Simon and Rolls

The machine was dry and empty each time and it doesnt really matter if it was or not, the design means the motor sits in the top of the cabinet in the silver container shown behind the blue plate in the loaded up pictures. it sits in a plastic container suspended by bakelite so it not connected to any metal parts of the machine, it doesnt have any earth wiring. The drive shaft goes down the centre to the mechanical pump and is connected via a plastic cooling fan so again anything metal or wet cannot touch the motor. This is why i think it will live long when working as there are no pump seals etc that can fail that would damage the motor.

both capacitors look fine and the has been no smell so unsure whats going on ill remove the motor and take photos and see if i can see any problem.

Cheers Richard

 

[ricky5050]

oops

Simon i forgot to say you cannot start up the motor by turning the rack, its designed to free wheel to load up plates, plus the mechanical cog bits dont turn only from the motor shaft due to the gearing but thanks for thinking about. I have not poked a meter at it as i wouldnt have a clue what to do and probably make a loud bang myself!

Richard