[jcronk69]

I just picked up a 316 tonight. I was surprised when I went to look at it, as I was expecting a Onan twin. Little did I know in 1978 they made a 316 with a k341 single. Over all the tractor is in pretty decent shape, runs decent to. The previous owner said it stopped moving and lost hydraulics.
He assumed there was something wrong with the hydro pump. I pulled the fender pan off, and found the drive shaft spinning on the pump input shaft. (shaft not actually turning)
There are 2 set screws on the rear driveshaft hub that must have came loose.
Unfortunately it looks like it was ran for a while and hogged out the hole in the rear hub. Hopefully I can get by with installing a new hub and set screws and the input shaft is not damaged. Worse case I have a 317 parts machine with a good hydro I can install.
I'm pretty excited to finally have a running hydro machine!

 

[akaothermick]

Joshua, try Loctite 638 or 680 these products can be used on large clearance fittings to repair them if they are worn

 

[deereman84]

Joshua-
Those originally had a roll pin that went through the driveshaft hub and through the hydro input shaft. The hydro input shaft is not keyed. I would try and go back to a roll pin. Without a key, that is a lot of force for a set screw to try and hold.

 

[jcronk69]

I thought they had a roll pin originally. When I looked up the parts on the jd parts system, sure enough, the part supersedes, and it says to also order 2 set screws.
I took it apart last night, and unfortunately, it must have been ran like this for some time. The input shaft is worn down badly.
I am going to swap the whole transmission assembly out with one I have from a 317 parts machine. I also ordered a new drive shaft rear hub and set screws.
With any luck, the parts should be in next week and I'll have it cutting grass by next week end.

 

[jcronk69]

Also it looks like the set screws are supposed to be aligned with the original roll pin holes and
the tapered end of the set screws protrude down into the hole in the shaft. That would prevent any slipping as long as they are properly tightened.
I think i will keep an eye on them and re tighten them for the first few weeks of operation.
Makes me nervous now, knowing they caused all this damage already.
I may put some loctite or jam nuts on them to keep from loosening up.

 

[wmgeorge]

Well... if the shaft is already shot, you could carefully MIG weld the hub to the shaft. Using cooling rags to prevent damage to the seals and bearings.
A cutting disk or wheel in an angle grinder can cut it off if needed in the future.
OR B put in either a roll pin(s) or solid tapered pin which requires a tapered reamer.

 

[jcronk69]

The hub and shaft fit so sloppy now that it would be tough to get centered and not have it wobble all over. I yanked the whole rear end out of my 317 parts tractor and it looks like they are the same.
Just waiting on my new hub from my local Deere dealer and I will put her back together.
Hopefully I can use my long weekend to degrease everything and spray a fresh coat of paint on the frame.

 

[trav1s]

When you put the roll pin in place put a piece of wire thru it and then twist it off to hold the pin in place.

I have a thing for unusual machines and a 316k is one I would love to have for my collection. Congrats!

 

[jcronk69]

Yeah, it's definitely unusual, only made them in 1978. From what I can tell it's the same tractor as a 300 that was made from 75-77.

 

[cubby]

Joshua, You're gonna love it when you're through. My '76 300 acts like it was born to work. Lots of power and probably the simplest power plant, ever. No, it's not even in the same ballpark as a 318, but when it comes time to rebuild or repair it, your wallet will be happier.

 

[jcronk69]

Kevin, thats what I really liked about it.
I already have owned a couple single cylinder Kohlers and know they are durable and simple to work on. When the time comes for a rebuild, it is much cheaper than an Onan or twin cylinder Kohler.

 

[sd318]

Joshua, Like everybody else said they are great simple tractors that are easy to work on. I would just get a new hub and set screw and should be good for a long time. That was a update Deere came up with to cure roll pins shearing off. Here's a shot of my four, 75-300-33 tiller; 76-300-519MC; 77-300-Sweepster; 78-316K-542-front pto & 3pt. digger.