The bottom gear #53 has outer splines that go through top gear #52. There is a snap ring #54 that holds the two gears sandwitched on the bearing #58. Can you remove the snap ring #54 and allow the two gears to come out? This will allow you to tap better on the bearings.
Diagnosing 4WD problems YM240D
- Thread starter woolyAcres
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OP
woolyAcres
Platinum Member
Hi Winston-
Thanks for your response. I wish I had a photo but I don't at the moment. I don't think I can get to the snap ring (54). The whole assembly is still stuck inside the housing and I don't think I can reach through the top (where the spindle (44) has been removed). But I will have a look. I'll try to get a photo to explain this.
It seems to me the whole assembly (52; 58; and 53) should all slide out the bottom of the "housing". Based on the diagram, that's all that's left in there.
Thanks for your response. I wish I had a photo but I don't at the moment. I don't think I can get to the snap ring (54). The whole assembly is still stuck inside the housing and I don't think I can reach through the top (where the spindle (44) has been removed). But I will have a look. I'll try to get a photo to explain this.
It seems to me the whole assembly (52; 58; and 53) should all slide out the bottom of the "housing". Based on the diagram, that's all that's left in there.
OP
woolyAcres
Platinum Member
Alright. Here are some photos to show where things stand. The only path forward that I can see is to continue tapping the top gear-spindle-bottom gear assembly downward. I can fit a large socket into the top opening and hold the whole thing in a vice, but movement this way is very slow and I fear I'm bumping up against something and might break something. But I do believe this whole thing should 'slide' out (with some convincing). Is that correct?
Thanks,
Thanks,
I do not know, is the top gear diameter smaller or larger than the bottom bearing? If diameter is smaller it should go down through the bearing opening. If not, that snap ring that holds the two gears together will have to come off. I really don't understand why I can't see that snap ring in your second picture. Seems to me it should be visible. You can see the groove here that it should be in. SPINDLE GEAR (BOTTOM) _: Yanmar Tractor Parts
OP
woolyAcres
Platinum Member
Hi winston-
Both the top and bottom gears are smaller than the bearing. Unfortunately the photo doesn't show it but the snap-ring on the top gear is there, but I don't think I can remove it. The only access is through the top (where the spindle exited this assembly) and it's probably 4" down in there which is beyond my reach. It sure seems like the two gears are the bread and the bearing is the meat in this sandwich. I should point out that this whole thing is frozen. The gears won't turn and the bearing appears to be seized. This was the case before I started tapping on it and I believe this has been my problem from the beginning. The picture of the top gear does show the general condition- not great in there. I don't know if the top seal was leaking, or the fluid level was low somewhere in the past, but none of this will turn.
My searches haven't turned up much, but maybe I need to widen it to include comparable JD models. Doesn't the 240 have a JD cousin?
Thanks
Both the top and bottom gears are smaller than the bearing. Unfortunately the photo doesn't show it but the snap-ring on the top gear is there, but I don't think I can remove it. The only access is through the top (where the spindle exited this assembly) and it's probably 4" down in there which is beyond my reach. It sure seems like the two gears are the bread and the bearing is the meat in this sandwich. I should point out that this whole thing is frozen. The gears won't turn and the bearing appears to be seized. This was the case before I started tapping on it and I believe this has been my problem from the beginning. The picture of the top gear does show the general condition- not great in there. I don't know if the top seal was leaking, or the fluid level was low somewhere in the past, but none of this will turn.
My searches haven't turned up much, but maybe I need to widen it to include comparable JD models. Doesn't the 240 have a JD cousin?
Thanks
California
Super Star Member
- Joined
- Jan 22, 2004
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- 14,979
- Location
- An hour north of San Francisco
- Tractor
- Yanmar YM240 Yanmar YM186D
JD 750 is smaller, 850 larger (same as 2610), I think both were custom-designed for Deere after 240 was already in production. There isn't a closer Deere. I have no idea if these share front axle parts with YM240.
You probably know YM2000 is the Japan-market version of YM240 but it's the only thing that is identical. So there are parts out there but Hoye etc's replica, imported, or salvage parts are a more likely source than anything Deere.
Do you have the YM240 US English shop manual? It's excellent, may cover exactly what you need to know for this project.
You probably know YM2000 is the Japan-market version of YM240 but it's the only thing that is identical. So there are parts out there but Hoye etc's replica, imported, or salvage parts are a more likely source than anything Deere.
Do you have the YM240 US English shop manual? It's excellent, may cover exactly what you need to know for this project.
OP
woolyAcres
Platinum Member
Hi California-
Thanks for responding.
Fortunately I do have an I&T Shop Manual. It's about 60 pages and covers several different models, the YM240D being one of them. It's great for the exploded diagrams and other specs, but I haven't found anything regarding getting these two gears and one bearing out.
I'll see what I can figure out tomorrow.
Thanks for responding.
Fortunately I do have an I&T Shop Manual. It's about 60 pages and covers several different models, the YM240D being one of them. It's great for the exploded diagrams and other specs, but I haven't found anything regarding getting these two gears and one bearing out.
I'll see what I can figure out tomorrow.
California
Super Star Member
- Joined
- Jan 22, 2004
- Messages
- 14,979
- Location
- An hour north of San Francisco
- Tractor
- Yanmar YM240 Yanmar YM186D
The service manual specifically for Yanmar YM240 alone, published by Yanmar USA, has instructions for the dealer's mechanics covering everything. It's much more comprehensive than the I&T manual which seems to be for an experienced mechanic who works on a different model every day and needs only torque, capacities, etc.
Just now I couldn't find anyone selling the genuine Yanmar-USA service manual. Here's a listing but it was in 2010. Or watch on Ebay. Hoye's version might be an identical reprint but you will need to ask them that.
Just now I couldn't find anyone selling the genuine Yanmar-USA service manual. Here's a listing but it was in 2010. Or watch on Ebay. Hoye's version might be an identical reprint but you will need to ask them that.
If the bearing is locked up it is possible the outer race has turned in the housing causing it to be much more difficult to remove. Just from where I am sitting I would consider a large piece of hardwood that would barely fit through that top opening and a large hammer.
Ideally would be to separate the two gears but if the snap ring cannot be removed then I don't see any other choices.
Ideally would be to separate the two gears but if the snap ring cannot be removed then I don't see any other choices.
OP
woolyAcres
Platinum Member
@winston1- that's the situation I think I'm in. A bit of elbow grease is really the only practical way forward. I'll be as gentle as I can because those two gears are pretty expensive, but I can't put it back together the way it is....