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Subject: 1951 8N-C radius rods

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Chris Zuhn    Posted 05-25-2019 at 23:50:22 [URL] [DELETE]        [Reply] [Email]  
  • 1951 8N-C radius rods
  • Both radius rods on my 8N are bent upwards in the middle; one about 1", the other about 1-1/2". Can these be straightened? I know being bent affects the caster on the front spindle. Should I be concerned about the steering? Seems to turn one direction easier and faster than the other. Also, the axle assembly (center) is bent on one side, toward the rear, about 1/4", as it had been run into some immovable object. The outer axle castings are straight. Can this be straightened, or should I just adjust the steering to compensate? Tractors (in general) are new to me, and repairing this 8N is teaching me a lot about them. zuhnc

    Chris Zuhn    Posted 05-30-2019 at 00:04:59 [URL] [DELETE]        [Reply] [Email]  
  • Re: 1951 8N-C radius rods
  • Thanks to all for the suggestions. Today I straightened both radius rods, both were bowed to the outside and bent upwards. Tractor weight was insufficient to make any progress. So out with the heavy-duty chains and 12 ton bottle jack. Removed the axle end pins and the ball joint cover to see exactly how and where to place jack. Reinstalled one at a time, and then straightened both bow and bend. Took quite a bit of pressure to fix the bend; the bow was not so bad. Reinstalled the first and looked at the still bent one - the ball joint was at least 6 inches from its socket. Removed the straight one from its socket and put the bent one back into its socket. Still a lot of pressure to straighten; I would estimate 5-7 tons. Put it all back together and drove it to its parking spot. Seems to steer better, but while the front end was up, I checked the spindles and wheel bearings - lots of play in both. More things to do :=(. At least it is more driveable, and the Bush Hog (tm) is about completely repaired. Might get to cut the pastures before the summer heat dries it all up. Southwestern MO, north of Springfield, still thunderstorms and lots of rain most days. Again, thanks to all; one less thing to do on this old 8N. zuhnc

    K.LaRue-VA    Posted 05-26-2019 at 22:36:34 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 1951 8N-C radius rods
  • I believe the safest way to straighten them without a press is to flip them over so the bend goes down, put your floor jack under the radius rod. Use the weight of the tractor to help straighten one side at a time. Use a short block of 4x4 wood between the jack and radius rod if your jack doesn't have a rubber pad. If the weight of the tractor isn't enough, you can still pass a large chain under the jack and fasten near each end of the radius rod. At least with the radius rod attached to the tractor things are less likely to become missiles if something slips or breaks.

    Chris Zuhn    Posted 05-27-2019 at 00:00:00 [URL] [DELETE]        [Reply] [Email]  
  • Re: 1951 8N-C radius rods
  • Thanks for all the suggestions. I had contemplated exchanging them side for side, and using the jack under them. No angle iron available in the proper length, but plenty of chain. No press, either. Have 4 ton and 12 ton bottle jacks, but the tractor only weights a couple of thousand pounds! Barring any rain here (Camden County, MO) should be a project the first part of this week. Again, thanks to all. zuhnc

    Ultradog MN    Posted 05-26-2019 at 04:55:51 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 1951 8N-C radius rods
  • Did you folks know that the radius rod from a 3000 will fit on an 8N?
    I discovered that a few years ago. The 3000 ones are the same size but much beefier.
    They won't fit on a 9/2N as those attach in the front differently than an 8N and they must be from an early 3000 as those attach in front like an 8N.

    Kirk-NJ    Posted 05-26-2019 at 02:58:38 [URL] [DELETE]        [Reply] [Email]  
  • Re: 1951 8N-C radius rods
  • You can straighten them on the tractor by using some chain, a couple pieces of angle iron and a bottle jack or take them off and use a press. When they are bent bad it will effect the wear on the axle pin and bushing which may need to be changed out. Further wear will go thru bushing and waddle out the hole on the axle.

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