226D Front Drive Always Engaged-pics

   / 226D Front Drive Always Engaged-pics #1  

HappyDaze

New member
Joined
May 25, 2018
Messages
20
Tractor
Yanmar 226D
Doing some grading in a tight spot the other day, ran the bucket up a maple sapling which lifted the front tires off the ground for a second and while doing so, I noticed the front wheels were in drive mode. Not usually a problem except the lever was in the 2wd position (up).

I noticed then that the lever moved way too easy, so I assume some sort of damage to the innerds. Decided to just dig into it since these tractors are almost fun to work on compared to my Subaru.

So it looks like someone stood on or jumped up and down on the front drive lever at some point when it wouldn稚 move instead of taking the time to engage it properly. Whatever the mechanism of destruction, the outcome was pretty impressive. You can see the peg on the right way down there and the piece it sits on is bent downward probably from the force of it suddenly engaging and rolling past the groove it normally rides in (think getting a tire onto a rim, that last bit seems physically impossible but given the right amount of leverage...and this is steel!) which made some serious dents in the tooth and the hole for the peg that it rides on is out of round and no longer fits on the peg. And the little guy sloshed around in the oil for who knows how many years but it has so many rings and scratches it looks like it came from the somewhere on the front of the Millennium Falcon.

I致e got to say that as much of a pain it is having to repair stuff on this once-pristine machine, getting to see the engineering and thought that went into making it and getting a front row seat to see how it actually works is actually quite rewarding to me. So...understanding exactly how this thing engages the front drive will help me use it properly and cause less wear and tear on it.

That痴 it, no real question or problem (sorry), just wanted to share pics of the inside of what would be a transfer case on a car or truck, but is lovingly referred to as a drop box here.

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   / 226D Front Drive Always Engaged-pics
  • Thread Starter
#2  
I dig into the front drive case this afternoon so thought I should post pics while I was that far into it.

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   / 226D Front Drive Always Engaged-pics
  • Thread Starter
#3  
I thought I could just spin that arm around and get it out of there but the shaft is in the way. Can anyone offer experience on getting it out or at least sliding it back a bit to get the shift arm out and straighten it again?

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   / 226D Front Drive Always Engaged-pics #4  
You need to remove the drive shaft boot, oil seal and then you will find a snap ring that holds the bearing and shaft. Remove that, then the shaft and bearings should come out. Haven't done it but I believe that is what the parts drawing shows. See figure 47.
 

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   / 226D Front Drive Always Engaged-pics
  • Thread Starter
#5  
Thanks for that link. How does the oil seal come out and will I have to damage it in order to get it out? Just want to get another one headed this way in case.
 
   / 226D Front Drive Always Engaged-pics
  • Thread Starter
#6  
I think I got this. I’ll post pics of any progress as I go.
 
   / 226D Front Drive Always Engaged-pics #7  
Thanks for that link. How does the oil seal come out and will I have to damage it in order to get it out? Just want to get another one headed this way in case.

Have to damage it. Pry it out or run a metal screw in it and pull it out.
 
   / 226D Front Drive Always Engaged-pics
  • Thread Starter
#8  
Thanks for the confirmation, it dawned on me why leave the old one it has served 35 years now and that is probably more than I should ask of it. We will have a new one shipped while I finish the repair.

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   / 226D Front Drive Always Engaged-pics
  • Thread Starter
#10  
So I got it down to here, I straightened out the shift arm and now and I’ve got a couple questions.

Are the bearings pressed on to the shaft or will they come off with some soft persuasion?

If not, how do I get the shift fork back in that groove while it’s on the shift lever?

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