Reply To: Problems with a Stanley no4
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rubenip,
Thank you for the photos, it helped a lot.
As I suspected from one of your earlier photos, the “Y” yoke didn’t look right and it isn’t.
The yoke on Stanley planes is a cast iron material.
Yours is a stamped and formed material which is different and is not correctly bent. I just tried to duplicate your problem on my #4 and if the yoke is advanced too far, the cap iron screw is stopped, the blade lifts from the frog and the lateral lever is disengaged.
The cast yokes cannot be bent or squeezed in an attempt to tightened up the backlash on the blade advance knob. Those that have tried are rewarded with a broken yoke. Your yoke is a replacement available here:
http://servicenet.bostitch.com/Parts/Search?searchedNumber=16234
There is a possibility that the yoke is installed backwards or is bent too much forward. You can remove the yoke by driving out the holding pin with a pin punch and either reverse the yoke or remove some of the bend with a hammer a little at a time.
Hoping that this helps and resolves your problem.
Nothing like getting to know your tools intimately 🙂
Best,
Craig
P.S. I looked a little closer and I don’t think the yoke is reversed.
I think you’ll have to remove some of the bend or file back the leading edge of the engagement tab, maybe both.