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On every M/MT governor housing I have seen recently; the mounting flange for the two spring loaded throttle arms has been badly worn on half its radius by the heavy pressure of the arms connecting spring.. Making it bind and causing engine RPM and throttle position problems. The only locally available fix for cast housings is a brsss braise putting the flange back to round for tighter fit of outer arm. Since brass is rather soft; you are only kicking the problem a little further down the garden path... Does anyone have a solution or repair source whereby one can get a harder weld on that flange OR any other long term fix. The inner arm center shaft hole to outside flange wall is to thin to turn it down to round and pressing on a bushing... Help... I'm about out of airspeed and ideas here!!! KLINK
 

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On every M/MT governor housing I have seen recently; the mounting flange for the two spring loaded throttle arms has been badly worn on half its radius by the heavy pressure of the arms connecting spring.. Making it bind and causing engine RPM and throttle position problems. The only locally available fix for cast housings is a brsss braise putting the flange back to round for tighter fit of outer arm. Since brass is rather soft; you are only kicking the problem a little further down the garden path... Does anyone have a solution or repair source whereby one can get a harder weld on that flange OR any other long term fix. The inner arm center shaft hole to outside flange wall is to thin to turn it down to round and pressing on a bushing... Help... I'm about out of airspeed and ideas here!!! KLINK
Welcome aboard!

Here are a few governor housings being advertised on eBay although one definitely appears to have some bellcrank linkage wear:

http://www.ebay.com/itm/John-Deere-M-MI-MT-MC-Tractor-Part-Governor-Housing-Cover-and-Control-Rods/131321312870_trksid=p2141725.c100338.m3726&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D20141212152715%26meid%3Dfcd052faff59478782b63e9e5b1d97ab%26pid%3D100338%26rk%3D8%26rkt%3D30%26sd%3D331493637979

John Deere Tractor Governor Housing and Linkage M1709T | eBay

Vintage John Deere Tractor Governor Housing Linkage M1709T M Model Series | eBay

http://www.ebay.com/itm/John-Deere-Tractor-Governor-Housing-Lever-Spring-M50T-M-MT-MC-MI-40-/331493637979?hash=item4d2e8f7f5b

Tough restoring a cast housing. Brazing will work temporarily. You might be able to use a stainless steel Speedi-Sleeve over the cast housing to shim out and restore the O.D. of the bellcrank location:SKF Speedi-Sleeve
 

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I would be hesitant to do anything that would increase the hardness of the pivot flange because that would cause the throttle rod to wear out instead. Brazing the flange with bronze or Babbitt metal every 15 to 25 years just seems a lot more cost effective. I don't think there is a way to add in an additional support for the throttle rod as it bends immediately after the support.
 
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