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McElroy Fusion Discussion
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PostPosted: January 14th, 2013, 12:23 pm 
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Joined: September 29th, 2009, 2:45 pm
Posts: 239
I have a T412 carriage that is binding on one side when the directional control valve is actuated in either direction under lower carriage pressure. It is most noticable when the carriage is at full stroke and I reverse the direction. Anyone else out there have the same issue and have you found a fix? I hate to rebuild the cylinders unless I'm 100% sure as this is time consuming and expensive. How can I measure the carriage to see if it is racked? I bled the cylinders of air


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PostPosted: January 14th, 2013, 5:15 pm 
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Joined: June 17th, 2007, 12:23 am
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Location: Brisbane, Australia
is it doing it without pipe being installed? I have had out of spec pipe make this happen. just by loosning the clamp it worked right so it was a small amount but it made in bind up.

remove the jaw and weldment on each side and check that they are not bent.

how old is this unit. or better yet rae the rods real old maybe? there was a directional rod used back in the 70s & 80s not that this is likely the case.


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PostPosted: January 16th, 2013, 5:49 pm 
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The machine is acting up with no pipe in it. The machine is only 2years old at max.


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PostPosted: January 25th, 2013, 2:51 pm 
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Joined: October 16th, 2007, 2:01 am
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Location: Wisconsin, USA
If it is that bad where it binds up, could be an internal snap ring that holds the piston in place on the rod may have slipped out of it's groove allowing the piston to float which results in 1 cylinder moving ahead of the other... You may have to rebuild? :?:


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PostPosted: January 30th, 2013, 6:06 pm 
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That's what I was suspecting too. I haven't been able to get back on it but, I'll repost what I find.


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PostPosted: February 4th, 2013, 6:06 pm 
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Good news, I took the time to rebuild the cylinders and discovered the two back-up seals on the piston were binding against the inner walls of the cylinder on one cylinder. It took some persuasion to get the rod and piston out of the cylinder. The machine is back up and running like it should be.


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PostPosted: February 5th, 2013, 10:26 am 
Thanks for the update. It is nice to know what the culprit was.


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