Bearing Plate

[Scott24 2]

Hello,

I have a 314-H, Model Number 73403 with a Kohler engine M14-601559.  While trying to replace the spark plug module (a mouse chewed through the wire) I snapped off the left bolt head.  I was able to drill it out and tap it.  I then decided to go just a hair bigger and while tapping the new hole I broke the tap.  I have tried different tap extractors as well as trying to weld a nut onto it, but have had no luck getting it out.  I have looked for a new bearing plate, but it was discontinued a few years ago.  I've gone so far as to look at replacing the engine and there does not appear to be an after market one.  So now I think I need to look for a used motor or try and make another motor fit.  Any ideas on where I might find a bearing plate, motor or how I might get the tap out would be appreciated.

[Ed Kennell 41,959]

Any equipped machine shop should be able to burn it out.

[pfrederi 18,670]

19 minutes ago, Ed Kennell said:

Any equipped machine shop should be able to burn it out.

 

Ed:  Question??   the end plate isn't steel it is some pot metal alloy can they still burn things out????

 

Edited September 18, 2020 by pfrederi

[8ntruck 7,833]

A plunge EDM machine will be able to burn the tap out of the hole.

 

Years ago, I saw an article about converting an inexpensive engraver into a tap burner.  Don't remember where, though.  Probably Popular Mechanics or Popular Science.

[953 nut 59,969]

2 hours ago, Scott24 said:

Any ideas on where I might find a bearing plate,

Call Lincoln at A-Z Tractor, he will fix you up.               https://a-ztractor.com/

[Ed Kennell 41,959]

3 hours ago, pfrederi said:

 

Ed:  Question??   the end plate isn't steel it is some pot metal alloy can they still burn things out????

 

Material should not be a problem Paul.     The EDM can do some amazing pin point  machining.

[WVHillbilly520H 10,376]

@Ed Kennell ... Here is a "wire" EDM that I used to set-up program and run at the factory I learned machining in.

[Scott24 2]

1 hour ago, 953 nut said:

Call Lincoln at A-Z Tractor, he will fix you up.               https://a-ztractor.com/

Thanks 953 nut!  They do show one in stock if the machine shop route doesn't work out for some reason.  Thank you all for the feedback.  Hopefully I can find a machine shop willing to take the time to help me out.

[JoeM 8,337]

I know you have said you have tried to weld a nut to the tap and that surly is material that is small and hard to weld.  I have in the past been able to slide metal down along the flutes of the a broken tap, tacked a flat washer to that area and then a nut on top. Of course you at dealing with a #10 size ish screw. Also a little heat during extraction will help also.  

[Ed Kennell 41,959]

Have you tried a tap extractor? 

 

https://www.ebay.com/i/264295132533?chn=ps&norover=1&mkevt=1&mkrid=711-213727-13078-0&mkcid=2&itemid=264295132533&targetid=4580290572086399&device=c&mktype=&googleloc=&poi=&campaignid=403204655&mkgroupid=1227055191472610&rlsatarget=pla-4580290572086399&abcId=9300377&merchantid=51291&msclkid=3eb030e518ed1ac89f2a6f831b45a386

[Scott24 2]

JoeM thanks for that idea.  I think the challenge will be in getting a piece of metal small enough to fit in the flute.  Ed Kennel, I have tried a tap extractor although it may not have been a high quality extractor since I bent it some while trying to get the tap out.  Thanks for the ideas.

[JoeM 8,337]

On 9/19/2020 at 1:00 PM, Scott24 said:

metal small enough to fit in the flute

Mig wire.