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Hydraulic cylinder nick

S

sodly

Member
Can a nick or ding in a hydraulic cylinder shaft (the part that retracts into/out of the cylinder) be repaired? If so, how?
 
If it's shallow, some fine emery cloth may knock down any sharp edges that could
damage the seal. If it's deeper, and leaks, it may need welding up....I haven't
done that before.

Ben
 
Using a very fine toothed flat file, and good sense with it, file any material protruding from the ram. polish with 600 grit silicon carbide
only where the ding is located, and only across the shaft, not along. Take a half hour to do it. Jim
 
After the treatment of filing and polishing I have heard of filling the nick with JB weld to make it smooth again. I haven'tried this and don't know if it works. Maybe
someone else will comment.
 
If it is smaller than 1/16" and shallow, I would try it to see if it leaked. If bigger, that is a good idea. Roughen the dimple then clean with carb cleaner, dry as old toast, then fill and again polish. Jim
 
We used JB weld on the hydraulic elevator pistons with great success. Clean and dry with brake clean, then applied and sanded smooth. The application was less than 400 psi usually.
 
I have used JB Weld to fill a small ding in a cylinder as well as axles. There is no structural pressure on a cylinder ding. Make sure you clean it well so that no oil residual remains then fill. With a hand file carefully shape it and then polish it. The seal will seal against it and you'll have no leaks. Still holding up.
 


I used JB weld on a Ford row crop power steering cylinder. The damage was rust where the chrome had worn off maybe 3/16x5/16. That was 8 years ago.
 
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