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D6C leaking blade lift cylinders

D6C leaking blade lift cylinders

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Silver
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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.
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Mon, Apr 20, 2020 11:07 AM
jstandle
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Mon, Apr 20, 2020 9:53 PM
seiscat
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Hi Silver, This should help. I didn't compare the different pages to see what the differences were.
[attachment=58296]IMG.jpg[/attachment] [attachment=58297]IMG_0002.jpg[/attachment] [attachment=58298]IMG_0003.jpg[/attachment] [attachment=58299]IMG_0004.jpg[/attachment]

[attachment=58300]IMG_0005.jpg[/attachment] [attachment=58301]IMG_0006.jpg[/attachment] [attachment=58302]IMG_0007.jpg[/attachment] [attachment=58303]IMG_0008.jpg[/attachment]

There's lots of good info here. Please help the club by becoming a paid member.
Craig
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Mon, Apr 20, 2020 10:54 PM
Silver
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Reply to seiscat:
Hi Silver, This should help. I didn't compare the different pages to see what the differences were.
[attachment=58296]IMG.jpg[/attachment] [attachment=58297]IMG_0002.jpg[/attachment] [attachment=58298]IMG_0003.jpg[/attachment] [attachment=58299]IMG_0004.jpg[/attachment]

[attachment=58300]IMG_0005.jpg[/attachment] [attachment=58301]IMG_0006.jpg[/attachment] [attachment=58302]IMG_0007.jpg[/attachment] [attachment=58303]IMG_0008.jpg[/attachment]

There's lots of good info here. Please help the club by becoming a paid member.
Craig
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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?
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Tue, Apr 21, 2020 1:01 AM
greengiant
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Reply to Silver:
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.
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Tue, Apr 21, 2020 1:45 AM
Old Magnet
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Reply to Silver:
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?
[quote="Silver"]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?[/quote]

Yes, removing shims will allow further compression of the chevron packing. Does depend on how worn and how hard the packing is.
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Tue, Apr 21, 2020 5:19 AM
Silver
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Reply to Old Magnet:
[quote="Silver"]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?[/quote]

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.
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Tue, Apr 21, 2020 7:07 AM
edb
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Reply to Old Magnet:
[quote="Silver"]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?[/quote]

Yes, removing shims will allow further compression of the chevron packing. Does depend on how worn and how hard the packing is.
Hi Team,
scan from a Serv Mag of the day details the procedure--printing the scan may make it more readable.
Cheers,
Eddie B.
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Tue, Apr 21, 2020 7:16 AM
Silver
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Reply to edb:
Hi Team,
scan from a Serv Mag of the day details the procedure--printing the scan may make it more readable.
Cheers,
Eddie B.
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That's good stuff. Thank you
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Tue, Apr 21, 2020 10:16 AM
Glum
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Reply to Silver:
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.
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Tue, Apr 21, 2020 11:18 AM
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