Hydraulic Cylinders repair tools

YNM_O~o · Jan 26, 2018

Can anyone tell me what tools I need to change seals on my hydraulic cylinders for my front loader?
I guess there is one tool which engages two holes on the lock ring where it opens (piston end) and another tool which collapses the ring so it can be released inside the cylinder tor the rear seal?

I noticed that Kubota's have a flat surface on each side of that locking ring to fit a wrench, but mine has two holes.

Yanmar 2210D w/V2 loader

oldseabee · Jan 26, 2018

This is what I used on my case backhoe. It has different size pins
on each side.

Dan in North Houston · Jan 30, 2018

There are lots of different ways hydraulic cylinders are put together. Some use pin spanners, some use hook spanners, some have wrench flats, some may need pipe wrenches. Some have a retaining ring in a groove inside the barrel, and you push the gland down first to expose the ring so you can remove it. Others have a wire ring that fits in a groove around the barrel, and you fish one end of it out of a hole and pull it out.
So without looking at your cylinder, it's hard to tell what you might need.
There are a lot of repair videos on U tube, suggest you review some and you'll get an idea of what's involved.

YNM_O~o · Jan 30, 2018

The pin holes on yours are on the flat face of the ring, mine are on the exterior round surface.

YNM_O~o · Jan 30, 2018

Based on your comments, I think I need a "hook spanner."
Is there some kind of tool which holds the internal seal bundled up so it can be worked inside the cylinder, then released into a groove on the inside of the cylinder?

I'm sure this will all be obvious once I crack it open, but I wanted to have any required tools before I open it.

Thanks for the answers!

Dan in North Houston · Jan 30, 2018

A hook spanner is for notches around the circumference. They make pin spanners for pin holes around the circumference of the cylinder head, and pin spanners for the pin holes in the flat face of the cylinder head.
Typically you don't need a tool to bundle up the seal. You are thinking along the lines of a piston ring compressor tool. If you need a compressor tool, you can usually make one out of a hose clamp and a few pieces of flat bar or a piece of sheet metal. The end of the cylinder bore should have a little chamfer to help start the seals in. If not, you can create one with a file pretty quick. Stuff a rag in the bore first to keep the filings out, and make clean up easier. Be sure to get all of the filings wiped out good.

Hydraulic Cylinders repair tools

YNM_O~o

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oldseabee

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Dan in North Houston

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YNM_O~o

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YNM_O~o

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Dan in North Houston

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