Hi all. My D6C 76A blade lift cylinders are leaking oil on the ground while sitting. Of course, my manuals don't cover fancy add-ons like blades and winches and such. The tops of the cylinders have 4J3589 cast into them. Angle blade with no identifying marks. Wondering what the part numbers to the seal kit is and that the process is for changing it. Just a schematic would be great. I'm sure I'll have to pull the polish rod and remove the piston in order to replace the rod seals. Thanks in advance for any tips.

Edit: looks like there are a few different types, here are the 3 that I found (found these on the Heavy Equipment Forum)

drive.google.com/file/d/1BF34lzb4KxiqVdf...f9D/view?usp=sharing

drive.google.com/file/d/19fJZ4tdN8UfVxvs...F8c/view?usp=sharing

drive.google.com/open?id=1xE9DZpAAiSuFQbTQNtFC-O4aTeV2_318


Jordan

Hi Silver, This should help. I didn't compare the different pages to see what the differences were.




There's lots of good info here. Please help the club by becoming a paid member.
Craig

Thank you both for your information, that's a great help. Makes it easy to buy a membership with great folks like you around.

Because the seals in the head are leaking oil onto the ground, would the removal of a shim or two (2J3861) and re tightening possibly be enough to re seal the packing?

have you tried pouring in some stop leak? I've had good success with it on some ancient hydraulic cylinders.

"Silver" wrote:

Thank you both for your information, that's a great help. Makes it easy to buy a membership with great folks like you around.

Because the seals in the head are leaking oil onto the ground, would the removal of a shim or two (2J3861) and re tightening possibly be enough to re seal the packing?

Yes, removing shims will allow further compression of the chevron packing. Does depend on how worn and how hard the packing is.

"Old wrote:

Yes, removing shims will allow further compression of the chevron packing. Does depend on how worn and how hard the packing is.

Thanks OM, I removed 2 shims and will see what happens.

Hi Team,
scan from a Serv Mag of the day details the procedure--printing the scan may make it more readable.
Cheers,
Eddie B.

That's good stuff. Thank you

If removing the shims doesn't stop the leak, you can add a section or two of the chevron packing simply by splittng it at an angle with a sharp knife and working it around the rod and then re fitting the gland. No need to remove and totally strip the cylinder, provided things aren't totally shot. I have also used ordinary square graphite rope packing with success to give a bit of extra compression to the existing packing.