Reply by MrUnix

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Posted on Delta Jointer - difficult to start, trips internal breaker, will start after a few tries

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7582 posts in 2802 days

#1 posted 12-07-2018 08:44 AM

Hi folks – I just acquired a great Delta jointer from a friend. It sat in an unheated outdoor storage unit for about ten years before I just picked it up.

It struggles to start. We have oiled all bearings and lubricated the spindle that turns with the knife blades. After 3 to 4 tries (where it briefly starts then trips the machine s reset breaker), it will finally start and run. It handles jointing wood just fine once it is running. If you shut it off, even briefly, you need to go through the same set of repeated tries to get it to run continuously.

What would cause this? Could it be the brushes on the motor? Are there areas of moving resistance that I may not have lubricated?

Suggestions welcomed.
- hifliercanada

It’s an induction motor – no brushes. My bet would be the start capacitor – would cause the symptoms you describe. Those things don’t last forever, and really don’t like sitting idle for years in unconditioned spaces. Easy enough to test though with a cheap multimeter in resistance mode. You probably should replace your bearings as well, for the same reason – that and the fact that if you did really ‘oil’ them, then you sped up their demise if they aren’t already trashed. Sealed bearings require grease – and oil will just aid in flushing it away. Great for a very temporary fix, but will do long term damage.


-- Brad in FL - In Dog I trust... everything else is questionable

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