Cylinder gouge

Anonymous-0 · Mar 15, 2009

I pulled out one of the swing cylinders on my 755 hoe today to fix the rod seal. Looks like a seal won't fix it. There is an inch long gouge about a 16th inch wide and about a 32nd inch deep. Each time the rod passes over that spot it will spurt some oil. Has anyone repaired something like this? I was thinking about brazing and milling down. Maybe TIG? Any success storys would be appreciated.

Jim

Uncle Ernie · Mar 15, 2009

I have had a couple repaired but never tried it myself. I have seen both brazing and welding.Both involved completly tearing down and remachining the rod. If it is a seldom used home/ farm unit I might try a little J-B weld with a lot of cleaning first.Esp on a swing cyl. It is probably single acting.

Heat Houser · Mar 15, 2009

Depends on how much you are going to use it. Is it a production machine? If not, a cheap fix that will last a couple of hundred hours is to preheat the area and then solder it. If you can spin it somehow, you can then lightly use a file to take it back down to size. You will be surprised how long it will last. Used to do this to scored spools on control valves that were leaking out of the end.

If it is going to auction, solder......

The correct way is to rechrome or rerod.

msb · Mar 15, 2009

Have it spray welded. Only way to keep it straight and true.

bill mart · Mar 15, 2009

watched them repair a gouge in a 5" hydraulic cylinder on an elevator in the building I work in.they used jb weld.3 months later still holding. bill m.

Jon Hagen · Mar 15, 2009

Have repaired many, even without disassembling the cylinder if you can extend the shaft damage 1 ft beyond the seal.
Wrap the shaft with wet rags by the cylinder seal to prevent heat damage to the shaft seal.
Place shaft with the damage upright, heat and clean with soldering paste, fill the damage with acid core solder. Cool the shaft and use emery tape to cut the solder repair to the level and shape of the shaft. works well and wears a long time.

Anonymous-0 · Mar 15, 2009

of CHEAP basterds.......... a new cyl is not that much $ and you wont have JB WELD or some other miracle cure floating around you hyd system causing problems.

FIX it right and be done with it

RodinNS · Mar 15, 2009

I would be inclined to solder it. It would require less heat to lay in place so it should cause less damage to the chrome on the rest of the rod. It doesn't really need much strength. It just needs to adhere to the rod... The rough file it to size, then clean it down with emery cloth.
2 bucks is worth as much as a 200 buck rod if it does the job and you're out nothing if it doesn't work.

Rod

greygoat · Mar 16, 2009

The only sure way is to have good machine shop
spray weld it. Cylinder must be disassembled-
rod is centered in a lathe and undercut at the
damaged place, then spray welded oversize,at the
undercut place, and
turned down to original size. The spray weld
is a very hard chrome alloy. Rod will look like
new and be harder than new at the fixed spot!If you know the make and model of the cylinder it
may be less expensive to purchase a new rod.

Cylinder gouge

Anonymous-0

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Uncle Ernie

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Heat Houser

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msb

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bill mart

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Jon Hagen

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Anonymous-0

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RodinNS

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greygoat

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