Hydraulic Cylinder and Seals
I just replaced the seals in a lift cylinder on the old Case 1840 . It was quite a challenge though. My dad was a hydraulic man and also manufactured hydraulic steering systems for the big boats on the Miss River and the inland waterways of south La. I should have paid detailed attention to him working and building these things including cylinders but didn't. Shame on me. but this past week the opportunity came along and I did it . I prayed for guidance and then dug into it.
It was intimidating at first.. but miracles do happen and it was done and finished and now is back up and working- pulling up fence posts and cleaning the barn.
Here are a few pictures. I did buy a gland tool as pictured for $42, as it can be used other cylinders requiring it in the future. the 3ft pipe wrench of my Dad's would have left tooth marks on the "head" of the gland and that's a no no here, so didn't use it for the removal. I did use a 3/4 inch breaker bar and a long cheater with the gland tool (after removing the little set nut ). It came loose and I stopped until I took out the pin holding that end on the skid steer so I could lay the chromed rod end down on fender of machine. Before that though , I took loose one hose to relieve pressure and then pulled out the shaft after completely unscrewing it .
If you don't remove the hose on the back end then it will not come out but will instead form a suction. I had also previously worked the hand levers to relieve any pressure .
After I took out the shaft to examine the pistons and head of the cylinder I saw that a bolt was holding the end on. The 3/4 impact wrench wouldn't budge it.. I was very disappointed. I remounter the shaft only on the skid steer using the pin just taken out of the skid steer. This would hold it while I used a cheater bar (5 ft) in the breaker bar. (I had also heated the bolt only a bit as I think red locktite was used on it. You can breakdown red locktite when heated to 550 degrees according to a video put out by that company,) The bolt came loose and then I started working on the seals after sliding off the gland and end piece.
I took out the old seals and laid them out in the order they went and proceeded to clean and remove all foreign pieces of the gland and tail piece.
the old seals/packing were so deteriorated that I had to check a few things with the company I bought the seals from .
https://hwpartstore.com/blogs/tips/installing-u-cup-seal-hydraulic-cylinder
I finally got the Ucup seal in by hand after more prayers for guidance and got it to slip in the grove pretty quickly .
Finally, I replaced the gland and end piece, locktited , tightened up, l with the cheater pipe and reinstalled . Thanks to the Lord and His guidance and so I finished the job.
The people at the hydraulic store I listed above were very helpful and were knowledgeable about what I was searching for and also answered some questions I had . I will always buy my seals from this company in the future. bordercollie