Thread: Meet my 90, and share the adventure.

Yeah... it's not looking good.
Motor housing is full of fine sand / mud and it's all corroded inside.

2/4 Brushes are seized within their holders, and the rotor has some significant rust and light scoring in the area where the brushes wipe over it due to all the sand and mud that was inside it.

I'm going to have a crack at the 'repair' option, but this might end up being a 'replace' the 12V motor assembly job. We shall see.

Well, the armature isn't stuffed. That's some good news.
Did the 3 tests outlined >here<, and it seems to check out OK.

Further reading of an intermittant operation followed by a failure to move also points to a failure of the brush holders / brushes.

I've given the armature a bit of a touch up with some contact cleaner and done the preliminary tests above.

Testing the resistance between commutator bars 180degrees apart


Testing resistance between adjacent commutator bars


Testing for Open loop between commutator bar and armature stack


I also pulled out the field windings. These will get a bit of love before being reinstalled.


Another shot of the mess inside




Booze Revooz
Drinking a port of undeterminate origin. I have a little oak barrel thing that I fill up with whatever I can get my hands on, and it has taken on a flavour of its own. You can see it in the first pic. I'd recommend you try it, but this one is mine. Git yer own.