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Hydra Mac 8A (Gehl 2500) restoration... or "Oh No... What have I done?"
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<blockquote data-quote="vinito" data-source="post: 97486" data-attributes="member: 12954"><p>Wow! I <em>finallllllly</em> got the hydrostats done. And to think this all started because I just wanted to fix the hydrostats in the first place. Then comes today and it's about the last thing I finished in the effort to rebuild the whole dang machine.</p><p>Here's a pic of the setup:</p><p><a href="http://smg.photobucket.com/user/mikeyphoto/media/20160907_154354.jpg.html" target="_blank"><img src="http://img.photobucket.com/albums/v110/mikeyphoto/20160907_154354.jpg" alt=" photo 20160907_154354.jpg" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p>Fluid fed into the hydro via the hose, which is easy to prime set up this way. I'm not sure how easy that's going to be in the machine and I don't have any great ideas to do that, but I'll try to figure something out. But I digress. The fluid just comes out the output shaft area which in the machine will flow into the gearbox to lube it then flow back to the tank. With this setup it just runs out and dripa back into the bucket o' juice. You can see the gauge sticking out there and the charge pump relief valve is the hex head just above and left of where the gauge hose is screwed into the hydro, so dead easy to access. You can see the little T-shaped thing I made to chuck in the drill press to spin the input shafts, but not yet bolted to the hydro. The setup was simple and it worked really well. All you need to copy my method is a 2 ton drill press to run the show <img src="https://www.skidsteerforum.com/DesktopModules/AdverForums/ImageGallery/emotion-1.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p>I had to add shims in both and they are set to about 100lb (about all I could get) and the specs wanted between 70 and 150 lbs., so that's OK. I didn't need to make any springs. Also, I apparently had assembled one incorrectly and had to flip it around to function properly with the appropriate input shaft rotation. I don't know what happened there as I was pretty careful putting things together, and if I had to do it today before using this setup I still would have put it together the same way, but whatever. It seems to work well. I'm glad to discover and fix this before it went into the machine.</p><p>One thing I noticed is that they are extremely quiet even at full speed compared to what it was before, but of course there was zero load on it so that is probably not going to be so different once it's actually pushing the machine around. We'll see.</p><p>Well that's about it for today. <span style="font-size: 15px"><strong><em>Woohoo!</em></strong></span> though.</p></blockquote><p></p>
[QUOTE="vinito, post: 97486, member: 12954"] Wow! I [I]finallllllly[/I] got the hydrostats done. And to think this all started because I just wanted to fix the hydrostats in the first place. Then comes today and it's about the last thing I finished in the effort to rebuild the whole dang machine. Here's a pic of the setup: [URL='http://smg.photobucket.com/user/mikeyphoto/media/20160907_154354.jpg.html'][IMG alt=" photo 20160907_154354.jpg"]http://img.photobucket.com/albums/v110/mikeyphoto/20160907_154354.jpg[/IMG][/URL] Fluid fed into the hydro via the hose, which is easy to prime set up this way. I'm not sure how easy that's going to be in the machine and I don't have any great ideas to do that, but I'll try to figure something out. But I digress. The fluid just comes out the output shaft area which in the machine will flow into the gearbox to lube it then flow back to the tank. With this setup it just runs out and dripa back into the bucket o' juice. You can see the gauge sticking out there and the charge pump relief valve is the hex head just above and left of where the gauge hose is screwed into the hydro, so dead easy to access. You can see the little T-shaped thing I made to chuck in the drill press to spin the input shafts, but not yet bolted to the hydro. The setup was simple and it worked really well. All you need to copy my method is a 2 ton drill press to run the show [IMG]https://www.skidsteerforum.com/DesktopModules/AdverForums/ImageGallery/emotion-1.gif[/IMG] I had to add shims in both and they are set to about 100lb (about all I could get) and the specs wanted between 70 and 150 lbs., so that's OK. I didn't need to make any springs. Also, I apparently had assembled one incorrectly and had to flip it around to function properly with the appropriate input shaft rotation. I don't know what happened there as I was pretty careful putting things together, and if I had to do it today before using this setup I still would have put it together the same way, but whatever. It seems to work well. I'm glad to discover and fix this before it went into the machine. One thing I noticed is that they are extremely quiet even at full speed compared to what it was before, but of course there was zero load on it so that is probably not going to be so different once it's actually pushing the machine around. We'll see. Well that's about it for today. [SIZE=4][B][I]Woohoo![/I][/B][/SIZE] though. [/QUOTE]
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Hydra Mac 8A (Gehl 2500) restoration... or "Oh No... What have I done?"
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