This message is a reply to an archived post by Paul WI on March 07, 2016 at 14:30:08.
The original subject was "Re: 24 Speed Transmission Questions".
So here's what I think I found out. I took the main hydraulic pump out of my tractor last week and took it apart. The aluminum bores in the pump itself where the gears run are around .006-.018 larger than the high end of the tolerance and the brass bushing bores the gears go into are also .002-.011 over the high tolerance. We checked the flow for both the high volume (2000 psi) side of main pump and the low volume (300 psi) side before pulling the pump and both were only 50-60% volume of what they were supposed to be. We split the tractor last weekend and took the input assembly out, smaller "o" ring in low piston was blown out, intermediate clutch disc is warped around 1"!, friction is wore pretty bad especially on the inside part of it. Low disc is warped around 1/4" and friction is wore about the same. High discs and frictions are ok, but there is a blown sealing ring on the transmission brake support which effects your high pressure.So here is my guess on what happened. I rebuilt the engine like I said last spring. About 10 hrs into hay season reverse started acting up and about 10 more hours low started to as well. I ran the tractor around 100 hours like this and tried to use intermediate as much as possible but my nephew's were running it some as well and im sure they were running high range some and possibly low . I think the shavings from the clutch packs plugged the hydraulic filters bad enough to bypass them and run dirty oil through the pumps and destroy them as well. Im scared my aux pump on left side is somewhat compromised too but im going to try to run it for this year. Bottom line.....if you lose reverse in these tractors PARK THEM!! I could have split this tractor , pulled the powershift and put in an entire set of new o rings for $170 and put it back together in around 2-3 nights. Now im going to be putting over $3000.00 of o rings, clutches and at least one pump into it. Dave B at Kuhn Equipment in Illinois has been very helpful with information on this transmission, and also id recommend ordering your parts through them guys. Also the Jensales service manual I ordered is well worth the money. Step by step instructions and pictures on each step.
The original subject was "Re: 24 Speed Transmission Questions".
So here's what I think I found out. I took the main hydraulic pump out of my tractor last week and took it apart. The aluminum bores in the pump itself where the gears run are around .006-.018 larger than the high end of the tolerance and the brass bushing bores the gears go into are also .002-.011 over the high tolerance. We checked the flow for both the high volume (2000 psi) side of main pump and the low volume (300 psi) side before pulling the pump and both were only 50-60% volume of what they were supposed to be. We split the tractor last weekend and took the input assembly out, smaller "o" ring in low piston was blown out, intermediate clutch disc is warped around 1"!, friction is wore pretty bad especially on the inside part of it. Low disc is warped around 1/4" and friction is wore about the same. High discs and frictions are ok, but there is a blown sealing ring on the transmission brake support which effects your high pressure.So here is my guess on what happened. I rebuilt the engine like I said last spring. About 10 hrs into hay season reverse started acting up and about 10 more hours low started to as well. I ran the tractor around 100 hours like this and tried to use intermediate as much as possible but my nephew's were running it some as well and im sure they were running high range some and possibly low . I think the shavings from the clutch packs plugged the hydraulic filters bad enough to bypass them and run dirty oil through the pumps and destroy them as well. Im scared my aux pump on left side is somewhat compromised too but im going to try to run it for this year. Bottom line.....if you lose reverse in these tractors PARK THEM!! I could have split this tractor , pulled the powershift and put in an entire set of new o rings for $170 and put it back together in around 2-3 nights. Now im going to be putting over $3000.00 of o rings, clutches and at least one pump into it. Dave B at Kuhn Equipment in Illinois has been very helpful with information on this transmission, and also id recommend ordering your parts through them guys. Also the Jensales service manual I ordered is well worth the money. Step by step instructions and pictures on each step.