Yanmar Tiller Identification and Parts availability

[kevinleque]

Awaiting parts. They would have been here by now but the postal service took 6 days to deliver my priority envelope to them.

 

[kevinleque]

Update:
got everything apart, old bearing off, starting putting it back together with replacing that top bearing and find out.....
The Rod/Shaft that comes over from the PTO gear box is bent. ARGH!
So, now the wait for a replacement.
At least I know why the bearing went bad now.
I'll keep updating as it gets back together.
Thanks again to everyone for your insight, ideas and contacts.

 

[winston1]

Did you try straightening it?

 

[kevinleque]

I wouldn't know where to begin trying. Second problem is, the splines on it are twisted as well on both ends.
One thing for sure, I know how to dismantle the tiller. Figured I'd pull the other end off, and found the bearing on the other side for the tine rod is completely fried with no balls in it and full of weeds and string.

 

[winston1]

I understand if it is in that bad of shape. Sounds like your tiller is going to be pretty new mechanical wise when you get through. Somebody must have been using it with no shear pin or slip clutch. It took a mighty force to twist that shaft.

 

[kevinleque]

Yep, none of those were in place, and both u-joints were broken on the pto shaft that he surrender with it. Ill for sure be getting a slip or shear before I put it to work.

 

[kevinleque]

Quick additional question for those who have one of these tillers or are familiar.
First, I went aheads and dismantled most of the tiller looking for possible other problems,
On the Non-gear side of the tiller/tine shaft there is the Bearing Hub.
first, I took it off because it seemed full of weeds and twine etc.
Well there were no balls in that bearing, actually, you almost couldn't tell it was a bearing in there.
The Grease Zert was dies toyed as well. I got the bearing out finally both off the tine rod, and from inside the hub.
I'll see if I can get one to replace it.
second, Is the hub supposed to be one piece? The parts diagram makes it look like it supposed to come apart on the outside with a few bolts holding a cover in place. but, this is not how mine is at all.

Where as mine just looks like a bell/hub

Comments? Thanks

 

[winston1]

Mine is like the drawing. Makes no difference. You just have to go with what you have. Sort of looks like the outer bearing race has turned in your housing. Think so? Some people have gone back with a sealed bearing in that location. Looks as though there was never an oil seal in that location. Am I looking at something wrong or a piece missing?

 

[clemsonfor]

Sure looks like a race was spinning to me unless there is some type of sealed press in bearing there but it still looks spun.

 

[kevinleque]

It's alive. I had my doubts.
Yanmar RS1200 Tiller resurrected - YouTube

 

[kenmac]

good job ! it works :thumbsup: Most people I know (around me) use a slip clutch on their tiller

 

[kevinleque]

good job ! it works :thumbsup: Most people I know (around me) use a slip clutch on their tiller

I will for sure be putting a slip clutch on it, actually I think I'll have one made that I can use for all my implements.
I made mention in the notes of the video recognition of the tractorbynet forums and cold water tractors for all the help.
Thanks everyone. Now, I just have to keep my fingers crossed that it continues to work.

 

[clemsonfor]

Is that going the wrong way or is it spinning g so fast it appears to be going backwards?

 

[Scotty Dive]

Is that going the wrong way or is it spinning g so fast it appears to be going backwards?

That's funny - I don't have a tiller but when I watched that video I said to myself "Hmmn I would have thought the tines spun the other way"!

 

[kevinleque]

When I got my first Walk Behind Troy Built Workhorse rear tine,(Which has the similar tines) I thought the same way, but no, thats the way they turn.
The Tine style of those King Gutter with the big 90degree bends in them are a lot more aggressive.
Although these Yanmar's do work for our soil tilling needs, they were originally designed for Rice Patty use,
at least the ones that were sent over to the U.S. used from what I can tell.
I tried it in a small 40' long section in one of my smaller gardens that I know was very soft from being tilled every year for the last 7 years, and it did a very nice job of tilling and left behind a nice smooth trail.
I only wish it was a 5' instead of a 4' because my tire path is 5'
P.S. I did order my Clutch Break this morning. :thumbsup:

 

[California]

It's alive. I had my doubts.
Yanmar RS1200 Tiller resurrected - YouTube

That sounds nice! Congratulations for getting it restored. I'm impressed with the extent of your gardens and crops shown in your YouTube vids.


It seems to me that the tines on a rice tiller need to turn forward (same direction as tires) for a couple of reasons.

* To help propel a 2wd tractor forward while operating in muck. (rice paddy). Like 32-wheel drive.

* To avoid burying itself. If it were counter-rotating then (assuming a rice paddy) slicing a mat of rice roots from the bottom up might eventually hit a dense spot and dig in so the tiller couldn't be raised enough to get clear. This could only be resolved by backing the tires into the loose material it just dug. Good luck driving out of that.

* Preventing damage to the tiller: One point I have experienced in my (dry) orchard - The tiller will climb right over big roots it can't slice, without damaging itself or stalling. Its scary to hear it bounce up but it doesn't seem to hurt anything.

As for the shape of the tines - it looks to me that these are optimized for slicing rice roots in muck, in contrast to a US tiller that digs down into dry ground like a shovel. Nevertheless this does a nice job in dry ground. I found it does a good job of clearing blackberry roots. (An old post). Here's a picture from that post showing a small test I made at 540 then 1000 rpm pto setting, with engine at 1600. While the YM240 doesn't need full throttle for the tiller, the little YM186D needs to be at 'pto rpm'. (The YM240 has 24 engine hp with huge torque at low rpm, contrasted to 18 hp with a torque curve like a lawn mower on the YM186D).

 

[kevinleque]

Update 8 years later: Still running, I've replaced the tines a couple of times now.
Getting ready to service it today and put it away for the rest of the year.
I need to build a new rear flap for it as the original is so bent up etc.
Probably going to make a flap that can somewhat shape rows this time out.
I really want to thank everyone so very much Again for all the help with resources and input/information.
Hope everyone is doing well in these trying Pandemic times.
It was touch and go there for the last 4 years. We found out my wife had ovarian cancer and I wasn't even sure
we'd still be on this property. I'm totally restructuring the layout of the property/farm, building new greenhouses relocating water lines etc.
It's a lot of work, a lot of investment but I'm going to make this work or die trying. Doing 98% of the work myself so... it's taking time.
Wife is doing well now except for the after effects of Chemo, but she's otherwise doing great.
I'll try to remember to post pictures of the new flap I decide to go with.
Take care, and again, Thanks!

 

[bmaverick]

Update 8 years later: Still running, I've replaced the tines a couple of times now.
Getting ready to service it today and put it away for the rest of the year.
I need to build a new rear flap for it as the original is so bent up etc.
Probably going to make a flap that can somewhat shape rows this time out.
I really want to thank everyone so very much Again for all the help with resources and input/information.
Hope everyone is doing well in these trying Pandemic times.
It was touch and go there for the last 4 years. We found out my wife had ovarian cancer and I wasn't even sure
we'd still be on this property. I'm totally restructuring the layout of the property/farm, building new greenhouses relocating water lines etc.
It's a lot of work, a lot of investment but I'm going to make this work or die trying. Doing 98% of the work myself so... it's taking time.
Wife is doing well now except for the after effects of Chemo, but she's otherwise doing great.
I'll try to remember to post pictures of the new flap I decide to go with.
Take care, and again, Thanks!

Kevin, We now have the Part Manual for the tiller. See attached.

Compliments of the Yanmar Tractor Owners Group on GroupsIO.

And with the Yandex OCR image to text from Japanese to English, the manual is even better to understand.

Yandex

Finds everything

translate.yandex.com

 

[YanmarFever]

I have sold hundreds of those tillers and not a 1 had a broken gear, just bottom bearings from sitting in the water.
You can buy the bearings at Napa they are real common & cheap.
Give it a paint job after the repairs and you will be happier !

 

[bmaverick]

I have sold hundreds of those tillers and not a 1 had a broken gear, just bottom bearings from sitting in the water.
You can buy the bearings at Napa they are real common & cheap.
Give it a paint job after the repairs and you will be happier !

Do these tillers use a shear-bolt to prevent gears and bearings from breaking?