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Southern Tier NY | When transmission gets warm, no longer have 2nd & 4th in any range. Definite slippage to begin with and then nothing at all. Power shift clutch pack under the cab? Or a leaking valve soomewhere? Should the tractor go to a dealer or is the job of defining the problem and fixing not a huge deal? We've never split an articulated tractor, and can't tell if the cab would have to come off to access the front section transmission. Thanks for any and all advice. Kevin |
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central Indiana | 2sp needs changed..can get at it from the rear when turned sharply but not fun |
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Eastern Ontario | +1
No fun but can be done. Remove the top shaft guard before you bend it all the way to the right. |
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Southeast Florida | +2 Talk about a PITA! |
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Southern Tier NY | Thank you. Any other hints besides removing the top shaft guard before turning all the way to the right? |
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ND | Remove any sensors on top of clutch filter housing to avoid breaking them off and tape your allen head socket on to your extension, 5 bolts and you will have it out. Heavy. |
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Eastern Ontario | It's tricky, but I would remove the assembly in two parts. First remove the planetary carrier but be carefull not to loose any disks and plates. I have put a piece of tin underneath the assembly during removal. That way when something falls out I don't have to fish it out of the bottom of the housing. Then remove the hi low clutch housing using extensions. Tape the allen wrench socket to the extensions and tape the extensions together so you don't loose them. Be carefull with the bolts. They are easy to loose.
You will need to make a tool to compress the spring washers so you can remove the snap ring to take apart the piston. My best guess is you have a broken packing around the piston or the disks are worn to the point they are slipping. Take a look at the groves of the disk hub. Make sure the disks slide easily. Any edges and the disks may jam and possibly break. Check them on the inside and outside. It all has to move smoothly or you will have trouble. I fought this for many years on our 8630. After getting into the hi low for 5 or 6 times, we finally decided to get the update kit with the helical gears. That solved it. I think you already have this in your 8650.
When you put the plantary carrier back intot he tractor, take a piece of wire and strap the disks and plates so they don't fall off. It's easy to remove once it's installed.
Oh, there are a couple of vent hoses on the bearing quill ( lid ) which would be easier to remove before turning the tractor. And if you haven't done so yet, pressure wash the hinge area before you get started or you will come out a grease monkey for sure.
Also, mark the universal joints before you remove the shaft, so that you put it back together the same way it came out. Try not to take off the caps if at all possible.
Good luck
I have the manuals for a 8630 and 8640 which should be very similar to a 8650. I can scan and send them to you if you like. |
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ecmn | it comes out as one piece. use a cherry picker and a 10' pipe, the picker holds the pipe and the pipe goes into the shaft of the two speed. small chain welded to the pipe bolts to the two speed. then slide it out. |
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Southern Tier NY | Wow that's a lot of info! Thanks, Mike. I printed out your post and we'll see if we need any more help. Thanks again! |
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Southern Tier NY | Now we controversy. Remove as one unit or take the planetary carrier & hi low clutch housing out seperately? Anyone else have any thoughts before we begin, possibly tomorrow? TIA. |
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ND | Just lift it out in one unit.I am not that strong and can remove and replace in one piece. Never heard of anybody splitting it. |
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Southeast Florida | We always slid them out as one unit. I do remember that we used a cherry picker but I can't remember all the tricks to the 30-50 series 4WD's and I've really tried to forget them since most of them left this part of the world in 1989 when the 60 series came out. |
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ND | Forgot to add don't forget the 2 packings in front housing when you install it. |
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Southern Tier NY | Wish we could afford to just replace the tractor with a newer series, but for only 300 hours of use per year, no can do. Please excuse the ignorance: should we purchase a new complete unit, or order parts once we find out what's wrong? Of course parts would be cheaper, but could this be an instance where replacing an entire unit would be the best course of action? |
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Eastern Ontario | Here's the tool you need to make to lift out the hi lo in one piece. Email me for the rest of the instructions. Yours doesn't seem to be listed.
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 IMG_20120401_125205-1200.jpg (78KB - 407 downloads)
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Eastern Ontario | Make sure that the areas circled in red are in good condition to allow easy movement of the disks and plates.
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ScreenShot004.jpg (45KB - 415 downloads)
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Eastern Ontario | Replacement hi lo costs around $4500. I'd take it apart at least twice before spending that kind of money. But if money is no object, then replace and be done with it. |
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JD 8650
