7060 Jack Bolts
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=155518
Printed Date: 23 Aug 2025 at 9:45am
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Topic: 7060 Jack Bolts
Posted By: ABDave
Subject: 7060 Jack Bolts
Date Posted: 10 Nov 2018 at 11:43pm
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Well here I am again folks. To remove the castings from the rear axles on my 7060, I need to make the jack bolts that loosen the wedges which clamp the castings to the axle. I tried a 7/8" fine thread cap screw but the threads per inch are not the same as in the wedge. A 7/8 fine thread is 14 TPI and a thread gauge indicates the interior thread in the wedges is 13 TPI. As such it looks like those jack bolts are a special thread. Can someone tell fill me in please. 'till later, Dave
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Replies:
Posted By: DrAllis
Date Posted: 11 Nov 2018 at 6:39am
| There are a special thread, YES. I think you have the thread pitch figured out, as I remember it is one thread per inch different from a standard fine thread. I even have a special thread tap for cleaning out the holes in the bushings. For many years, every tractor came with four of those in a plastic bag. I don't know if they are available from AGCO or not, and if so, would be expensive, |
Posted By: DougS
Date Posted: 11 Nov 2018 at 7:01am
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A tractor salvage yard might have some. |
Posted By: Calvin Schmidt
Date Posted: 11 Nov 2018 at 7:16am
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I had some of these bolts made by a local specialty machine shop. Threads are 7/8 12 Also have the special tap to clean the threads. 12 thread is a common industrial HD thread for 1" and larger but uncommon for 7/8". I think a set should include 4 bolts not 3. ------------- Nothing is impossible if it is properly financed |
Posted By: DrAllis
Date Posted: 11 Nov 2018 at 7:27am
| Four bolts, absolutely for the double bushings style. |
Posted By: Dale Hardtke
Date Posted: 11 Nov 2018 at 8:30am
| You do not need four jack bolts. Use two jack bolts on the half of the bushing without dowel pins according to Allis Chalmers service manual section E page 15. Clean lubercated threads in the bushing half will do more good than a half a dozen jack bolts. Been there done that. |
Posted By: DrAllis
Date Posted: 11 Nov 2018 at 8:54am
| Been there and dun that too many times. Two bolts does work some of the time BUT, there are times that FOUR pusher bolts are needed !! After you break off an ear on the one bushings you are jacking on, you will soon discover FOUR pushers are the solution to not breaking an ear off. |
Posted By: Dale Hardtke
Date Posted: 11 Nov 2018 at 2:38pm
| The two jack bolts in the dowel pin half of the bushing do absolutely no good because taking out that half of the bushing while under the clamping pressure is not necessary. Dealing with the force necessary to overcome the friction of just half of the bushing is all that is needed. Two jack bolts (like the Allis Chalmers service publication says) works fine. I have never boken a bushing or have never seen a bushing that was broken by using jack bolts to remove it this way. ABDave: Jack the wheel side of your tractor you are doing and rotate the wheel so that the dowel pined bushing half is up on top. Jack bolt the other bushing half (with clean lubricated threads) and remove bushing half. !! DONE !! |
Posted By: DrAllis
Date Posted: 11 Nov 2018 at 3:36pm
| Well, Allis-Chalmers sure could have saved a lot of $$$$ by NOT providing four pusher bolts then. You do it whatever way you want. And I'll do it the way I want. I've apparently had some wheel axle bushings much tighter than anything you've ever experienced. By telling others they will never ever need to use four pusher bolts is just foolish. Have a great day!! And by the way, I have seen a broken bushing. I was the one who did it by trying to use only two pusher bolts. |
Posted By: Calvin Schmidt
Date Posted: 11 Nov 2018 at 4:44pm
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A-C would have done everyone a favor if they had included a tap in the kit. Likely 99 % would have been lost or never used. I just took all the 32" cast centers of an 8550 that had never been inside for a day and the wheels never moved. Got it done with three pusher pusher bolts, a big sledge, and lots of patience. I took one of the borrowed pusher bolts to have 12 more made and got a tap. Have more to get loose. I like going into battle with lots of ammo. The pusher bolts push the center off the wedges so I think four are better than three. Agree with Dale that clean threads is a big part of having success.
------------- Nothing is impossible if it is properly financed |
Posted By: Mikez
Date Posted: 11 Nov 2018 at 7:56pm
| I think I know what your talking about but in case not could you explain what your talking about, have any pictures. If allis. Supplied them is there part numbers. Thanks |
Posted By: MACK
Date Posted: 11 Nov 2018 at 8:17pm
| I have had to use four pusher bolts a lot of times. If you have worked on as many tractors as Dr. And I have, you would see a lot of things that is not in the book. MACK |
Posted By: SteveM C/IL
Date Posted: 11 Nov 2018 at 9:04pm
| as a side note,didn't someone say they C/IH used a jack bolt with same demensions? 7120 maybe |
Posted By: ABDave
Date Posted: 11 Nov 2018 at 9:36pm
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Looks like I will be visiting the local machine shop. I have an old Clausen lathe but the gearing for thread cutting is too worn for accurate threads. I'm hoping to find a tap as well. The threads in what I call the 'wedges' are too rusted and dirty to expect any measure of success. After stumbling around the internet for a while, it looks like 7/8-12 TPI is more common in the UK then North America too. 'till later, Dave
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Posted By: Ron(AB)
Date Posted: 11 Nov 2018 at 11:54pm
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Dave, You can borrow those bolts from Pentagon. You don't have to make them. |
Posted By: Calvin Schmidt
Date Posted: 12 Nov 2018 at 6:10am
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Ron, send me a PM, I'll sell you some pusher bolts reasonable. I don't need 12 ------------- Nothing is impossible if it is properly financed |
Posted By: FREEDGUY
Date Posted: 12 Nov 2018 at 6:21am
Don't know if they are the same,but I looked up bolts for the XT;part #70235674- takes 3 bolts in this application. I googled that # and found an outlet for them for $83  ,I would hope that is for all 3?? I suppose that might be less expensive in the end vrs. labor setting up and machining from scratch ?
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Posted By: Dale Hardtke
Date Posted: 12 Nov 2018 at 7:23am
| FREEGUY: The bushing used on the AC 190 is a one piece bushing with smaller jack bolts. Totally different than the two piece bushing used on other model Allis Chalmers tractors. Dr. Allis wil probably call you foolish if you do not use four jack bolts but three is all that is used. |
Posted By: injpumpEd
Date Posted: 12 Nov 2018 at 7:37am
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Just to add a little clarity, the D19/190/200/D21/7000 use the smaller trianglular hub, which only uses 3 bolts to hold it tight, but they also use all 3 holes tapped 3/4" Coarse to use the smaller jack bolts. The 210/220 use the bigger 2 piece wedges, (and jack bolts 7/8" -12)which have 3 bolts on each half. The thought of 3 jack bolts used on these is because the one half has tapped holes, the other half does not. It seems to me the need for 4 jack bolts came later in the 7000 series run, the 7010/7020/8010 only use 4 bolts to tighten the 2 wedges(a way to cheapen the cast hubs) and I think all 4 bolt holes are tapped for jack bolts. If the hubs are tapped for 4 by all means use them if you have them. But if only 3 are tapped, well, that answers that lol! Now, lets all have a beer and shoot the $h!t! lol!
------------- 210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers! |
Posted By: Mikez
Date Posted: 12 Nov 2018 at 8:19am
| Ed you stopped before 8000. Thanks, then we can have a beer lol |
Posted By: Hurst
Date Posted: 12 Nov 2018 at 8:47am
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If you need a 7/8-12 tap, looks like they aren't too expensive. I just ran across this on google. I think it might be cheaper than the usual price for a standard bolt tap of the same dimensions! https://www.msdiscounttool.com/catalog/product_info.php?csv=gg&products_id=95012" rel="nofollow - https://www.msdiscounttool.com/catalog/product_info.php?csv=gg&products_id=95012 https://www.homedepot.com/p/Drill-America-7-8-in-12-High-Speed-Steel-Plug-Hand-Tap-DWTST7-8-12P/305700814?cm_mmc=Shopping%7CG%7CBase%7CD29A%7CMulti%7CNA%7CPLA%7CMajor-Appliances%7CSpecial-Buys%7c71700000032418849%7c58700003842365800%7c92700030987191770&gclid=CjwKCAiA5qTfBRAoEiwAwQy-6Tk_Jaa8KAAUWp-up_r_p7sPxFb6ngpM3fIQ8kVdGTtfX-TY1prFChoCJ1sQAvD_BwE&gclsrc=aw.ds" rel="nofollow - https://www.homedepot.com/p/Drill-America-7-8-in-12-High-Speed-Steel-Plug-Hand-Tap-DWTST7-8-12P/305700814?cm_mmc=Shopping%7CG%7CBase%7CD29A%7CMulti%7CNA%7CPLA%7CMajor-Appliances%7CSpecial-Buys%7c71700000032418849%7c58700003842365800%7c92700030987191770&gclid=CjwKCAiA5qTfBRAoEiwAwQy-6Tk_Jaa8KAAUWp-up_r_p7sPxFb6ngpM3fIQ8kVdGTtfX-TY1prFChoCJ1sQAvD_BwE&gclsrc=aw.ds ------------- 1979 Allis Chalmers 7000 5800 Hours |
Posted By: Michael V (NM)
Date Posted: 12 Nov 2018 at 9:36am
| I need to fix a leakin axle seal on my 7060,, so I'll be lookin for a set of these bolts...and a tap.I would like to move the hubs "in" a few inches also...I think the side with the leaky seal prolly break loose fairly easy,, now the other,,,, gonna be different... |
Posted By: Dale Hardtke
Date Posted: 12 Nov 2018 at 6:03pm
| Ed: You are absolutely correct. Lots of the two piece bushing sets do not have tapped 7/8 -12 holes to accept the jack bolts in the dowel half. I just checked approx. 30 sets of 3.625 3.750 4.000and found that about half of them did not have tapped holes for jack bolts. Maybe that is why the service publication does not mention using four jack bolts. |
Posted By: littlemarv
Date Posted: 12 Nov 2018 at 6:27pm
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Someone needs to make a video demonstrating whatever in the hell you guys are trying to do.... I see this topic come up now and then, and would be interested in learning the how and why of whatever jack bolts are used for. I may never have an Allis that new or large....(never say never)! ------------- The mechanic always wins. B91131, WC23065, WD89101, CA29479, B1, Early B10, HB212, 416H |
Posted By: FREEDGUY
Date Posted: 12 Nov 2018 at 6:49pm
 Can you see the triangle wedge on the axle? The pusher bolts go in the holes that currently have the 3 regular bolts in them to tighten the wedge on the axle. The pusher bolts are tapered to loosen the wedges.
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Posted By: ABDave
Date Posted: 13 Nov 2018 at 12:01am
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Well I got lucky. I was chat'n with my neighbour who told me of a fella a few miles away who once had a 7030, so I called him and sure enough he had those jack bolts and said I was welcome to use'm. Ron Thanks for the tip. Should have thought of that. 'till later Dave
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Posted By: BrianC
Date Posted: 14 Nov 2018 at 7:44am
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This is for Marv, but others please comment if I got it right. Open up the Agco parts book online for 7060, go to page 302. Study that. The bushings have bore inside to the axle diameter, tapered on the outside to fit the tapered hole in the wheel disk. The bushing #7, with the 2 pins also has a machined in key to fit the key way slot on the axle. I presume the lip of that bushing contacts the wheel face. This bushing therefore locates on a face, a tapered bore and two pins, and locates the axle concentric with the wheel. It is highly constrained dimensionally, so must be machined right. Three 3/4-10 bolts secure it to the wheel. The other bushing, #8, the simple one, is placed in there and then it's (3) 3/4-10 bolts are tightened. Because of the taper in the wheel disc and matching taper on the bushing, as the 3/4-10 bolts are tightened it is wedge locked tight. The lip on this bushing doesn't contact the wheel. How to take it apart to remove wheel or adjust thread width. You have to pop out loose the #8 bushing some how. Remove the (3) 3/4-10 bolts securing bushing #8. Now come the use of the jack bolts. Little design details. In the wheel disk are the 3/4-10 threaded holes. They are not drilled through, but rather are blind holes. The (2) end holes in the head lip of #8 bushing are threaded 7/8-12. The holes function is as clearance holes for the 3/4-10 bolts. Other function is they provide threads for the jack bolts to do its job. The jack bolt- imagine a 7/8-12 full threaded bolt, 6" long. Now turn down the end to maybe 5/8" (to clear the 3/4-10 threads), 3" long. Insert the jack bolts into #8 holes, engage the threads. The point of the bolt will clear the 3/4" threads in the wheels holes. Eventually the tip of the jack bolt will bottom out in the blind hole of the wheel. Now turn hard with a wrench and you have a pushing out action to force that tapered bushing out loose. At some point the bushing #7 also got threaded 7/8-12 on its holes. This is the two or four jack-bolt debate. |
Posted By: Dale Hardtke
Date Posted: 14 Nov 2018 at 9:18am
| BrianC You are correct and explained the procedure correctly. The dowel bushing half needs to be secured tight against the wheel casting to locate the wheel properly. The dowel half bushing that you might have removed could have the 7/8-12 holes tapped, but not all dowel half bushings did. Many had just a clearance hole for 3/4 -10 hex head bolt. This is why Allis Chalmers service publication instructs to use two jack bolts in the no dowel bushing to remove the wheel castings. I just do not get it. If you follow this procedure you will be labeled as FOOLISH by some that should know better. |
Posted By: DrAllis
Date Posted: 14 Nov 2018 at 5:38pm
| Obviously the three pusher bolts on the non-keyed bushing design wasn't good enough. That's why they "re-designed" it to four pusher bolts in BOTH bushings. For those of us that have had to use all four pusher bolts (because two wouldn't get it done) we noticed that the whole wheel center gets pushed off of BOTH bushings. They are stuck to the axle, which is why sometimes two pusher bolts is inadequate. Any other questions ?? |
Posted By: amac
Date Posted: 14 Nov 2018 at 7:57pm
| Have to agree with the Dr on this one. When removing wheels from the axle for painting the wheel center always gets pushed off of the wedges. Then the wedges can be removed. |
Posted By: DrAllis
Date Posted: 15 Nov 2018 at 7:05am
| The original post was for 7000 series tractor, a 7060 to be specific. If one reads the Owners Manual, it tells how to go about this procedure. It has you using all four pusher screws in both bushings. Don't take my advice, look in the Owners Manual. Many times only two of the screws are needed on the non-keyed bushing, but there are some of those times when all four are required to get things busted loose. Like I said, I think the Engineers learned something from the 210/220 and knew they sometimes needed to be applying pressure to both bushings, not one. |
Posted By: Dale Hardtke
Date Posted: 15 Nov 2018 at 7:52am
| The information I have came from Allis Chalmers service publication. 7030 Thru 7080 dated Nov. 1975 and the procedure with two jack bolts likewise. I continue to not know how jack bolts can be used in bushing flange holes that are not tapped ???? I have a feeling that this issue / discussion is more about the size of your head than about sharing information or helping each other. THEREFORE I"M DONE WITH YOU. |
Posted By: DrAllis
Date Posted: 15 Nov 2018 at 8:23am
| They can't be used in bushings that aren't tapped. Those bushings you are looking at must be from a 210/220 era tractor and the keyed bushings weren't tapped and the other bushing was tapped in all three holes. The 7000 series has a different p/n for the bushings and (as far as I know) were always tapped in both bushings only the outside two holes, therefore the need for using four jack screws. I suppose there is a chance that tractors have had bushings changed over the years and the parts may not be correct for the model tractor they are on ?? There's also a chance that the publication you read is in error, not being updated to the newer 4 pusher bolt design. People come on this site all the time asking for help and advice. Incorrect advice doesn't help them and can make things even worse. No one is blaming you for intentionally and deliberately giving incorrect advice. There is supposed to be a difference between the 210/220 era wheel bushings and the 7000 series bushings and the number of pusher bolts that are used. Accept that as fact instead of being angry. |
Posted By: FREEDGUY
Date Posted: 15 Nov 2018 at 5:37pm
DUDE, you might mean well with your (up until now) replies,but you are stepping on some very descent toes and I am pretty sure you 2 are NOT dancing !! Please reign it back a notch or 2, JMO.
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Dale Hardtke wrote:Posted By: Calvin Schmidt
Date Posted: 15 Nov 2018 at 9:43pm
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Ok guys. When I made the suggestion near the beginning of this thread that they should have included four instead of three pusher bolts, it was because of my experience with an 8550 and both wedges were threaded. My 220 fwd is next so I will likely find only threaded holes in one wedge so will only be able to use three pushers. I have NOT read any of the service books regarding this procedure. Remember that the pushers push the cast center off the wedges. I can see why A-C made the change. ------------- Nothing is impossible if it is properly financed |
Posted By: Kevin in WA
Date Posted: 15 Nov 2018 at 10:44pm
| Well, it took John Deere till the 55 series to figure out that its easier to push the wheel off the wedges than to try and push one wedge out by itself. |
Posted By: 8070220
Date Posted: 16 Nov 2018 at 10:22am
| Any one still need them I got a set of 3 here still in the agco bag I sell and I think I got one that is not in the bag PM me if u need a set I have some 190 to . |
Posted By: Lonn
Date Posted: 16 Nov 2018 at 2:49pm
 ------------- -- --- .... .- -- -- .- -.. / .-- .- ... / .- / -- ..- .-. -.. . .-. .. -. --. / -.-. .... .. .-.. -.. / .-. .- .--. .. ... - Wink I am a Russian Bot |
Posted By: ABDave
Date Posted: 16 Nov 2018 at 3:01pm
| That's what happened in my case. Both large casting were pushed off the wedges. However, I used the four jack bolt method so the casting didn't have a choice. |
Posted By: bigal121892
Date Posted: 16 Nov 2018 at 3:38pm
| I still remember the year we went from 36" rows down to 30" rows. On our 7/8000 series tractors, we would have had a mess if we had tried to use just two jack bolts, as it was bad enough with using four. Got to go with the Doc on this one. |
Posted By: Tbone95
Date Posted: 16 Nov 2018 at 5:37pm
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Ok, back when I first got my big Allis, I got the advice on how to move the wheels on a different forum. Torque the jack bolts, whack end of axle a few times, repeat. No mention of axle whacking in this conversation! For me, a 7045 and 2 jack bolts (pretty sure? Maybe 3?). Only 1 of the split bushings in either case...And the left wheel moved with GREAT difficulty! But with perseverance it came loose. |
Posted By: darrel in ND
Date Posted: 16 Nov 2018 at 6:25pm
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I am not going to take sides here, because using two jack bolts and using four can both be right ways to do it. One of the first jobs I got assigned to when I first started working in the shop at a farm equipment dealership was a three way tire swap involving 8000 series tractors; all brand new. For simplicity we'll call the tractors A, B , and C. Rear wheels (cast centers and all) from tractor A went onto tractor B, B to C, and C to A. Don't remember the fine details, but all were FWA, and some front wheels may have been changed, too. It came down to the particular size tire that one customer wanted, and still having matching ratios between front and rear. I had never done the job in my life, much less even had a clue how to. Bosses instructions were to put the keyway up, pull the bolts out of the bottom wedge, and use the special bolts, as he called them (the jack bolts) to push the bottom wedge out. With air impacts and having two small forklifts to handle the wheels, the whole job went off without a snag. Never took a single keyed wedge out. BUT.....everything was BRAND NEW! I've never had to do the job on a 7 or 8 thousand series since, but I have no doubt that years of rust could change the whole scope of things. If I had to do the job again, long before I would put enough torque on a jack bolt to break an ear off, I would use four bolts on both wedges. I have removed wheel centers several times on D19/one ninety and XT tractors that have much age on them, and have never had an issue. I ALWAYS clean the jack bolt hole threads with a tap, brake parts cleaner, and compressed air until they are about flawless. Then I use grease, not oil, on the threads in the hole and on the jack bolt, plus I grease the pointed tip of the jack bolt. Go from bolt to bolt with the air impact and just chatter a little on each one, and never had one put up much of a fight. Guess when I get back to doing 7 or 8 thousand series ones again, I'll use the "clean and grease" method and try getting out JUST the non-keyed wedge. But as I stated previously, long before I am putting enough pressure on to bust off an ear, I'll use four jack bolts and take out both wedges. Now, put the gloves away and let's all get along. We can't afford to lose ANY members off of this forum. Any and all advice from everyone is necessary to keep the old allis spirit alive. Darrel |
Posted By: leoversteeg11
Date Posted: 16 Nov 2018 at 6:30pm
| My 7030, 7080,8070, both wedges are tapped and we used 4 bolts + lube + sledge +heat every single time. |
Posted By: Calvin Schmidt
Date Posted: 16 Nov 2018 at 7:47pm
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I did mention the big sledge in my second post last Sunday. I also used a 3/4" drive air impact gun. Didn't have to use heat. I broke the flange off a wedge on a 4250 JD years ago. Talked to the service manager at the dealership and he said to use a big sledge and hit the end of the axle as hard as you can after you have full torque on the pusher bolts. I think that made the difference between getting the centers off the 8550 or not getting them off. Sledge hit, re-torque, sledge hit , re-torque. All of a sudden the center starts moving. One made a pop sound after I walked away and then off it came. Big sledge is a very important part of the procedure. ------------- Nothing is impossible if it is properly financed |
Posted By: rieg
Date Posted: 16 Nov 2018 at 10:20pm
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We always use antiseize on the every thing before putting back together when moving hubs on our Allis and JD tractors. We have never had any trouble with moving after that. ------------- rieg |