Jesse in WI Posted February 12, 2021 Share Posted February 12, 2021 Like most 86 series tractors my 986 needs the bushing replaced on the LH side of the 3pt crank arm. Last year I replaced the seal and o-ring but that did not stop the leaking. What parts do you guys recommend replacing while I have this apart? Should I do bushings, seals, and o-rings on both sides and be done? Also any helpful tips on the R/R of the bushings would be greatly appreciated. Quote Link to comment Share on other sites More sharing options...
ksfarmdude Posted February 12, 2021 Share Posted February 12, 2021 3 hours ago, Jesse in WI said: Like most 86 series tractors my 986 needs the bushing replaced on the LH side of the 3pt crank arm. Last year I replaced the seal and o-ring but that did not stop the leaking. What parts do you guys recommend replacing while I have this apart? Should I do bushings, seals, and o-rings on both sides and be done? Also any helpful tips on the R/R of the bushings would be greatly appreciated. Might as well you gotta pull the shaft all the way out for either bushing Quote Link to comment Share on other sites More sharing options...
Jesse in WI Posted April 3, 2021 Author Share Posted April 3, 2021 I've got everything apart except for pulling the bushings. The new ones I got are not steel but plastic/fiber. What's the best way to install these without mashing the ends? Quote Link to comment Share on other sites More sharing options...
J-Mech Posted April 3, 2021 Share Posted April 3, 2021 Get a piece of (min) 5/8" all thread. Make up some large flat "drivers" large enough to go against the bushings. Need to be heavy. At least 1/4" thick, but 5/16", 3/8" or more is better. Use the bolt and washers to pull the old set into the housing, and to pull the new set in. Separate note: I in the middle of switching the original 2pt/cat II, 3PH off and 856 and over to cat III. Tractor has 13000+ hours on it with I'm confident over half used on 3pt. (Tractor has been in the family since new.) This swap required the lower bushings get changed because size changes. The old one were not wore in even the least. If your old ones look good, leave them alone. I don't recall whether the 986 had the cat II or III lower torsion shaft. You may have to remove the o-ring retainers to remove the bushings. Quote Link to comment Share on other sites More sharing options...
Jesse in WI Posted April 3, 2021 Author Share Posted April 3, 2021 I've replaced everything except the bushings so far and I can't stop the leaking on the left side. Unfortunately the bushings are the only thing left. I've put off doing this for 2 years now but I've wasted enough Hy-Tran on the floor of my shed to cover the cost of parts at this point. Quote Link to comment Share on other sites More sharing options...
J-Mech Posted April 3, 2021 Share Posted April 3, 2021 6 minutes ago, Jesse in WI said: I've replaced everything except the bushings so far and I can't stop the leaking on the left side. Unfortunately the bushings are the only thing left. I've put off doing this for 2 years now but I've wasted enough Hy-Tran on the floor of my shed to cover the cost of parts at this point. Leak may be something else. Are the bushings wore? Are they coated in a red material still? Quote Link to comment Share on other sites More sharing options...
Jesse in WI Posted April 3, 2021 Author Share Posted April 3, 2021 Here's the left side. There are some scratches and a bunch of what look like cracks on the outer edge. Quote Link to comment Share on other sites More sharing options...
J-Mech Posted April 3, 2021 Share Posted April 3, 2021 5 minutes ago, Jesse in WI said: Here's the left side. There are some scratches and a bunch of what look like cracks on the outer edge. It's not the bushing. How does the tube look? Pitted? Edit: wait.... looks like the seal retainer is broken on the bottom. Can you confirm? Quote Link to comment Share on other sites More sharing options...
Jesse in WI Posted April 3, 2021 Author Share Posted April 3, 2021 The dark spots are just that. Nothing noticable as far as pitting when I run my finger over the area. Quote Link to comment Share on other sites More sharing options...
Cdfarabaugh Posted April 3, 2021 Share Posted April 3, 2021 10 minutes ago, Jesse in WI said: Here's the left side. There are some scratches and a bunch of what look like cracks on the outer edge. Bet 10 bucks the seal has a big groove wore into the tube. A competent machine shop with a spray welder setup can build them up and turn them back to dimension. Bit of a pain to set up but can be done. Edit) I see you posted literally as I did strange that shaft isnt work more.....I guess I lose 10 bucks lol Quote Link to comment Share on other sites More sharing options...
J-Mech Posted April 3, 2021 Share Posted April 3, 2021 3 minutes ago, Cdfarabaugh said: Bet 10 bucks the seal has a big groove wore into the tube. A competent machine shop with a spray welder setup can build them up and turn them back to dimension. Bit of a pain to set up but can be done. Tube is very hard. Too hard to weld or even spray weld on. It will break if you attempt this. Guaranteed. It's like welding an axle. Seal retainer appears broken. Circled in green. Unless my eyes are playing tricks, this is your issue. Replace the retainer. Quote Link to comment Share on other sites More sharing options...
Jesse in WI Posted April 3, 2021 Author Share Posted April 3, 2021 That's a pool of oil. It's hard to take a good picture of this. Quote Link to comment Share on other sites More sharing options...
J-Mech Posted April 3, 2021 Share Posted April 3, 2021 Ok. My bad. Looked like it was broken. But I see now the seal retainer is larger than the bushing. This is the cat II system. The o-ring rides on the lower link assembly. There are 2 o-rings for the left side. Had you replaced both? Is the lower arm mount pitted? Quote Link to comment Share on other sites More sharing options...
acem Posted April 4, 2021 Share Posted April 4, 2021 How do the pieces that mate up to the seal and o ring look? Thx-Ace Quote Link to comment Share on other sites More sharing options...
Jesse in WI Posted April 4, 2021 Author Share Posted April 4, 2021 Both the tube and the crank arm look fine to me from a pitting standpoint. I'd really like to put in some new o-rings and put this back together. The other side of my brain says that I've got everything apart and I've got all the parts here so I should change the bushings as well so I don't have to take it apart again. Quote Link to comment Share on other sites More sharing options...
Andejo Posted April 7, 2021 Share Posted April 7, 2021 I replaced everything and did not install the bushings like J-Mech suggested. I should have done it that way but I didn't ask. I ended up ruffing up one of mine a little bit. Hardest part was getting the old one out and the retainer. I ended up heating up the retainer a little bit and using a 5 lb slide hammer to get them out. Buy and extra O ring because they are easy to rip. There cheap. When you send the tube threw it can tear your o ring from the round hole just in on your tube. I filled the edges down a bit so it wasn't so sharp. Good luck. Quote Link to comment Share on other sites More sharing options...
Vanstractors Posted April 7, 2021 Share Posted April 7, 2021 Change it all while you are there !!!old bushing with rods as guides to keep the new composits straight.Old retaining gland pull in the new ones 1 Quote Link to comment Share on other sites More sharing options...
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