Hydraulic cylinder rebuilt.

Geo-TH,In · Jan 23, 2016

I had three hydraulic cylinders decided to leak just sitting in cold pole barn. I'm thinking it may be a cold weather shrinkage problem, O-rings shrank. One of the cylinders was difficult to get apart. Someone had turned the end too far and pulled the wire all the way inside. I drilled the hole out a little larger, then used a smaller bit and drilled the backside of wire so when I turned the end, the wire decided to come out, THANK GOD!

I made a spanner tool using an old plumbing wrench. I also use a brake hone to clean up the end of cylinder. I find it easier to leave cylinder on tractor, saves removing hoses, just pull the rod and piston out.

I've concluded, if a hydraulic cylinder doesn't leak today, just wait it will leak tomorrow. I think I've rebuilt atleast a dozen so far.

Jim in MN · Jan 23, 2016

I've got one like that on a Massey 50F but it will have to wait til warmer days. The retaining ring on mine is also inside the groove. Should be a fun one.

Geo-TH,In · Jan 23, 2016

It's easy as long as the wire isn't sucked in all the way. I tap my end inward a little, takes stress off wire. Then I clean all the rust out of grove. Grease the wire before I install it.

The last cylinder I worked on today, the wire came out very easy. The piston was stuck, so I fired up the engine and gently applied a little hydraulic pressure. When the piston finally decided to come out, it landed 20 ft away. So leaving hoses attached was very use full. I would have never gotten piston out otherwise.

Replacing O-rings on piston was another story. I used a 1100 degree heat gun to warm up piston and rings. A little heat made it easy too.

Hydraulic cylinder rebuilt.

Geo-TH,In

Well-known Member

Jim in MN

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Geo-TH,In

Well-known Member

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