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AllisFreak MN 
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Joined: 07 Dec 2009
Location: Minnesota
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 Topic: 7040 steering cylinder
Posted: 18 Mar 2019 at 4:37pm |
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How big of a deal is it to re seal the power steering cylinder from a 7040? Mine seems to have sprung a small leak from one of the seals. Is this something I should do myself or send it in for repair? Thanks in advance.
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'49 A-C WD, '51 A-C WD, '63 A-C D17 Series III, 1968 A-C One-Seventy, '82 A-C 6060, '75 A-C 7040, A-C #3 sickle mower, 2 A-C 701 wagons, '78 Gleaner M2
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JPG AUSTRALIA
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Joined: 13 Sep 2009
Points: 761
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Posted: 18 Mar 2019 at 6:41pm |
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Easy job
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DougG
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Joined: 20 Sep 2009
Location: Mo
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Posted: 18 Mar 2019 at 7:51pm |
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Please explain the easy part,,
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SteveM C/IL
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Joined: 12 Sep 2009
Location: Shelbyville IL
Points: 8520
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Posted: 18 Mar 2019 at 7:58pm |
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No service manual? Shame on you. It's easy.Same as my 8070. Forgot how but it was simple.
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plummerscarin
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Joined: 22 Jun 2015
Location: ia
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Posted: 18 Mar 2019 at 11:26pm |
Did my 7060 last year. My service manual is missing the section for cylinder repair. I'd post pics but am having trouble doing so tonight. There are two snap rings. One external, one internal. I disconnected the hoses then removed the external snap ring. Push in the glandhead(?) to expose the internal snap ring and remove. Use care not to scratch the cylinder bore. Pull the rod assy. out (watch that end, I gouged my leg when I pulled it out) and remove both glandheads from the rod. There are O-rings and seals on inner and outer diameters of the glandheads. I checked the rod and bore for nicks and scratches and made sure the were smooth. After the seals are installed, I lubricated the bore and seals liberally with hydraulic fluid and carefully inserted the assembly installing snap rings in reverse order. Sorry I couldn't get the pics loaded but it should make sense when you see it. HTH.
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LB0442
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Joined: 27 Dec 2014
Location: Boise ID
Points: 767
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Posted: 19 Mar 2019 at 9:41am |
I thought for sure I had some pictures of the last one I did, can't find em.
I just take loose the piston/rod side of the cylinder, leave the other end attached, leave hoses on. Take outer retaining ring off, tap in that collar to expose a snap ring inside on the housing. Pull out the piston/rod assembly. There is a large nut on the end (new nut came with the AGCO kit). Be careful on the piston seal, it has to stretch to get it over the piston then you have to compress it to get it in the housing. I used a large O ring over the top of it with a hose clamp to compress it. If you just used the hose clamp on it it would probably damage the seal. I set it in there and remove the clamp just before I slide it in. All of them have worked great that way.
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LB0442
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Location: Boise ID
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Posted: 19 Mar 2019 at 9:47am |
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I sorry I looks like I just repeated the previous post, whoops.
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AllisFreak MN
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Joined: 07 Dec 2009
Location: Minnesota
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Posted: 19 Mar 2019 at 3:34pm |
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Thanks, good info here guys. I should hang my head in shame for not having a service manual, I know. Have one for all my other tractors, but not this one. Is AGCO the best source for the rebuild kit?
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'49 A-C WD, '51 A-C WD, '63 A-C D17 Series III, 1968 A-C One-Seventy, '82 A-C 6060, '75 A-C 7040, A-C #3 sickle mower, 2 A-C 701 wagons, '78 Gleaner M2
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LB0442
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Joined: 27 Dec 2014
Location: Boise ID
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Posted: 19 Mar 2019 at 5:46pm |
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I would recommend AGCO. I think the last set I put in was around $70 to 80.
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CTuckerNWIL
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Joined: 11 Sep 2009
Location: NW Illinois
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Posted: 19 Mar 2019 at 5:51pm |
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When you go to stretch the seal over the piston, get a half cup of vegetable oil from the kitchen, Heat it up in the microwave till is too warm to hold you finger in it, then soak the seal for a bit. After getting it on the piston, let it cool and it will shrink some, making assembly easier.
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farmboy520
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Joined: 22 Jun 2016
Location: Beason, IL
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Posted: 19 Mar 2019 at 9:14pm |
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A buddy of mine told me to use warm water instead of the vegetable oil and it worked just as well
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On the farm: Agco Allis 9695, 7060, 7010, R66, Farmall H, and Farmall F20 (Great Grandpa's)
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AllisFreak MN
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Joined: 07 Dec 2009
Location: Minnesota
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Posted: 20 Mar 2019 at 4:20pm |
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Ok ordered the parts today from AGCO $72.10. Can the inner seal be installed without the tool that collapses it or do I need to buy the tool?
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'49 A-C WD, '51 A-C WD, '63 A-C D17 Series III, 1968 A-C One-Seventy, '82 A-C 6060, '75 A-C 7040, A-C #3 sickle mower, 2 A-C 701 wagons, '78 Gleaner M2
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plummerscarin
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Joined: 22 Jun 2015
Location: ia
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Posted: 20 Mar 2019 at 5:38pm |
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Did mine without the tool. Bend in a C shape. Not easy
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