dieselfume
Member
Hi all,
Purchased this 4630 last fall with 9000 hours on it to help with running the bale processer, discing, mowing and other grunt work. it's been a great tractor up until about a week ago when these problems started to crop up.
First, the PTO-
This tractor has been hooked up to the 18ft discbine for two weeks. it's cut down a pile of hay. about one week back I was running it and the pto lever popped out. no big deal, put it back in, and on the way back on the next windrow, it popped out again. this happened a few more times until I found a tarp strap and hooked it up. Been running it that way ever since. I haven't been experiencing any slippage or unusual activity other than that, so I figured I'd use it as is with the strap until haying was over. Figured it was just a broken spring in the housing on the side of the case?
Now, the HYD-
At about the same time I noticed the tractor had a harder time lifting the disc mower when at an idle. give it a little more rpm, and it lifts it ok.
when you try to lift it at idle when first started up in the morning, it'll lift it just fine. it's when it's fully warm it acts up. This problem seems to be getting a little worse.
Today it was over 90 degrees, and I mowed about 11 hours strait with it all day long. by the end of the day, I shut it down, got out to check on my knives, got back in and gave it a little throttle. immediately the 3 point picked itself up (it had fallen down when I lowered the engine rpms to idle). I backed out of the throttle again, and waited a few seconds, the 3 point started dropping again. Also, I have no HYD pressure to any of the functions on the implement at idle now when hot. I also have some jerkiness in the steering at idle, but have never lost power steering.
When I get out, I can hear the Hydraulics not sound normal. sound more like a clicking or a chattering that I hear from the back of the machine and nothing in the front.
My big question is, Can whatever is going on in the hydraulics be related to what's going on with the PTO? Does the transmission have a separate hyd pump for running the clutch, and pto clutch?
I'm thinking I have what may be a hydraulic pump failure, but I'm not completely certain at this point. When at operating speed, you'd never know anything was wrong with the tractor.
Any suggestions on where to start? Should I be concerned about continuing PTO use on this machine if the HYD pump supplies pressure to the PTO clutch? or would this be completely unrelated?
I understand how hydraulics work, just not familiar with how JD plumbed these old tractors
Purchased this 4630 last fall with 9000 hours on it to help with running the bale processer, discing, mowing and other grunt work. it's been a great tractor up until about a week ago when these problems started to crop up.
First, the PTO-
This tractor has been hooked up to the 18ft discbine for two weeks. it's cut down a pile of hay. about one week back I was running it and the pto lever popped out. no big deal, put it back in, and on the way back on the next windrow, it popped out again. this happened a few more times until I found a tarp strap and hooked it up. Been running it that way ever since. I haven't been experiencing any slippage or unusual activity other than that, so I figured I'd use it as is with the strap until haying was over. Figured it was just a broken spring in the housing on the side of the case?
Now, the HYD-
At about the same time I noticed the tractor had a harder time lifting the disc mower when at an idle. give it a little more rpm, and it lifts it ok.
when you try to lift it at idle when first started up in the morning, it'll lift it just fine. it's when it's fully warm it acts up. This problem seems to be getting a little worse.
Today it was over 90 degrees, and I mowed about 11 hours strait with it all day long. by the end of the day, I shut it down, got out to check on my knives, got back in and gave it a little throttle. immediately the 3 point picked itself up (it had fallen down when I lowered the engine rpms to idle). I backed out of the throttle again, and waited a few seconds, the 3 point started dropping again. Also, I have no HYD pressure to any of the functions on the implement at idle now when hot. I also have some jerkiness in the steering at idle, but have never lost power steering.
When I get out, I can hear the Hydraulics not sound normal. sound more like a clicking or a chattering that I hear from the back of the machine and nothing in the front.
My big question is, Can whatever is going on in the hydraulics be related to what's going on with the PTO? Does the transmission have a separate hyd pump for running the clutch, and pto clutch?
I'm thinking I have what may be a hydraulic pump failure, but I'm not completely certain at this point. When at operating speed, you'd never know anything was wrong with the tractor.
Any suggestions on where to start? Should I be concerned about continuing PTO use on this machine if the HYD pump supplies pressure to the PTO clutch? or would this be completely unrelated?
I understand how hydraulics work, just not familiar with how JD plumbed these old tractors