what did i do?
what did i do?
was using the 350b today. at some point, the right side track/sprocket became "dead", with no power. only the left side was providing drive.
member, new hampshire timberland owners association
Was the right side working properly before it quit or were you beginning to have slippage?
Since you have drive to the other track, you know the failure is likely somewhere in the right steering clutch housing or final drive. You should be able to visually inspect the steering clutch from the top of the housing to see if it is turning when in gear.
Since you have drive to the other track, you know the failure is likely somewhere in the right steering clutch housing or final drive. You should be able to visually inspect the steering clutch from the top of the housing to see if it is turning when in gear.
(1) JD Straight 450 crawler dozer with manual outside blade; (2) JD 2010 diesel crawler loaders; (1) JD 2010 diesel dozer with hydraulic 6-way blade; (2) Model 50 backhoe attachments, misc. other construction equipment
yes, everything was working correctly. power to both, brakes work. i hadn't noticed any slipping, but that doesn't mean there wasn't any.
i pulled the top cover, and the clutch assembly rotates when the machine moves. not sure whether it turns from just the machine moving (driven by the left side). or, does it visually rotating indicate that power is at least getting to that part?
wally
i pulled the top cover, and the clutch assembly rotates when the machine moves. not sure whether it turns from just the machine moving (driven by the left side). or, does it visually rotating indicate that power is at least getting to that part?
wally
member, new hampshire timberland owners association
back out to the woods to attempt to diagnose the problem.
"in gear", with the left brake/clutch lever applied, crawler doesn't move. the disc assembly doesn't appear to move, either, although when letting out the foot clutch, the right side "takes out the slack" in the tracks, but doesn't move any further.
with the right brake/clutch applied, crawler turns to the right (forward).
so, is that a steering clutch issue? there isn't any noise emitting from the housing, as though the discs were slipping.
wally
"in gear", with the left brake/clutch lever applied, crawler doesn't move. the disc assembly doesn't appear to move, either, although when letting out the foot clutch, the right side "takes out the slack" in the tracks, but doesn't move any further.
with the right brake/clutch applied, crawler turns to the right (forward).
so, is that a steering clutch issue? there isn't any noise emitting from the housing, as though the discs were slipping.
wally
member, new hampshire timberland owners association
The first thing I would look for is moisture in the clutch housing. Water will cause your fiber plates to slip. But sense you said this occurred suddenly I suspect something else. I'll try and explain this so I hope I get this out right.
Okay... so how does the right steering lever compare to the left steering lever? If the right lever pulls further back than the left or if it feels really loose or free for the first few inches of pull, then I suspect you have a pressure plate stuck in the disengaged position.
Try to look past all of the linkage with a good light and see if you can see the throw out bearing. Work your lever and you should be able to see it moving or sliding on the throw out bearing tube. Look and see if the throw out bearing is making contact with the pressure plate fingers. Try and determine if they are springing back when you pull the lever against the pressure plate fingers. You should be able to see them if they are functioning properly. It is tough to see down in the clutch housing but if you get in the right position you can see enough to determine what it is doing.
Another possibility would be a broken axle. Usually if it is broken, then you will have noise and the slack you spoke of will either not pull up. It would be jumpy or not at all. Let us know what you find.
Okay... so how does the right steering lever compare to the left steering lever? If the right lever pulls further back than the left or if it feels really loose or free for the first few inches of pull, then I suspect you have a pressure plate stuck in the disengaged position.
Try to look past all of the linkage with a good light and see if you can see the throw out bearing. Work your lever and you should be able to see it moving or sliding on the throw out bearing tube. Look and see if the throw out bearing is making contact with the pressure plate fingers. Try and determine if they are springing back when you pull the lever against the pressure plate fingers. You should be able to see them if they are functioning properly. It is tough to see down in the clutch housing but if you get in the right position you can see enough to determine what it is doing.
Another possibility would be a broken axle. Usually if it is broken, then you will have noise and the slack you spoke of will either not pull up. It would be jumpy or not at all. Let us know what you find.
40 plus years working on JD 350s, 400Gs, 450s and other equipment both Ag and Construction.
to add to leonards comments check to see if you have free play between the fingers and the bearing or you could have broken springs in the pressure plate that would explain the sudden slipage..... on my 2010 one day the steering clutch worked next it did not ....so i pulled it down threw in an extra steel in and away we went
Last edited by jtrichard on Thu Nov 10, 2011 10:55 pm, edited 1 time in total.
2010 with 622 dozer with mod. 35 ripper and a 2010 with 622 dozer bought in 1969 and a 2010 loader with drott and mod. 36 ripper
thank you for taking the time (three of you) to answer my question.
back out to diagnose today. i can see the axle rotate inside the clutch assembly. it appears that the clutch isn't completely engaging. this seems to eliminate the final as a culprit. by adjusting the linkage, i was able to get the machine to do a little more than "take up the slack", but not to completely work on the right side.
i believe the three clutch fingers are working correctly, and spring back when the t-o bearing is released. there must be slippage, since the discs don't rotate when released, although they will rotate about 3 inches forward or backward when i shift the reverser before stopping.
looks like a little project coming up, as i'll have to pull the steering/clutch/brake stuff out the side and replace the defective parts.
thanks for the help,
wally
back out to diagnose today. i can see the axle rotate inside the clutch assembly. it appears that the clutch isn't completely engaging. this seems to eliminate the final as a culprit. by adjusting the linkage, i was able to get the machine to do a little more than "take up the slack", but not to completely work on the right side.
i believe the three clutch fingers are working correctly, and spring back when the t-o bearing is released. there must be slippage, since the discs don't rotate when released, although they will rotate about 3 inches forward or backward when i shift the reverser before stopping.
looks like a little project coming up, as i'll have to pull the steering/clutch/brake stuff out the side and replace the defective parts.
thanks for the help,
wally
member, new hampshire timberland owners association
My guess would be that some of the "keyways" in the fiber discs may have sheared off- you'll find out when you pull it.
(1) JD Straight 450 crawler dozer with manual outside blade; (2) JD 2010 diesel crawler loaders; (1) JD 2010 diesel dozer with hydraulic 6-way blade; (2) Model 50 backhoe attachments, misc. other construction equipment
minor update:
still haven't had a chance to work on the 350b. however, i needed to move it out of the way for some other project. it has been "resting" since early december, and hasn't moved in that time. until yesterday. i drove it around, and both sides were driving fine. as before, the left side works normally. pull on the left steering lever, and the dozer would turn to the left (which meant that the right side had power [temporarily]. however, when pulling on the right lever, it wouldn't turn to the right - either not disengaging, or not braking. still, i pushed a bit of snow with it, and still both sides had power.
when in the process of parking it, it slid sideways across the icy driveway (that was fun - at least i was wearing the seat belt, and it has ROPS). after ending up in the snowbank, the right side no longer had power, although the machine now nicely steers to the right when pulling the right lever.
dumass that i am, of course it's now "stuck" in a location where it'll be a bear to work on. i'll probably wait for a few weeks, or a month, and then move it to level ground to take the right side apart (assuming the wait will have the same effect, and allow the right side to have power temporarily.
wally
still haven't had a chance to work on the 350b. however, i needed to move it out of the way for some other project. it has been "resting" since early december, and hasn't moved in that time. until yesterday. i drove it around, and both sides were driving fine. as before, the left side works normally. pull on the left steering lever, and the dozer would turn to the left (which meant that the right side had power [temporarily]. however, when pulling on the right lever, it wouldn't turn to the right - either not disengaging, or not braking. still, i pushed a bit of snow with it, and still both sides had power.
when in the process of parking it, it slid sideways across the icy driveway (that was fun - at least i was wearing the seat belt, and it has ROPS). after ending up in the snowbank, the right side no longer had power, although the machine now nicely steers to the right when pulling the right lever.
dumass that i am, of course it's now "stuck" in a location where it'll be a bear to work on. i'll probably wait for a few weeks, or a month, and then move it to level ground to take the right side apart (assuming the wait will have the same effect, and allow the right side to have power temporarily.
wally
member, new hampshire timberland owners association
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