Hydraulic seal tool

I'm working on a hydraulic cylinder and the shaft seal (40mm ID x 60mm OD) looks like white nylon plastic book calls it KAYABA. Its rather stiff and hard to move, is there a tool for removing and installing this type of seal? The hole it fits into is 50mm and then goes to 60mm for seal seat.Shaft is 40mm.Seal is about 1/2" wide.

I remember heating the nylon seals in boiling water to increase their flexibility ...collapse the seal into it's self with round nose pliers and then release it into the groove, that should do it ....

Kayaba is most likely the manufacturer and if there's a special tool, they will have it. Kayaba makes hyd. jacks but is most known for making motorcycle suspension.

Here"s the type of seal installer I had to use to collapse the seal to install in a 1 inch bore. There are three differant sizes and work wery well. I ruined one seal trying to install without this tool.

Sounds to me like your talking more about the rod wiper than an actual rod seal. Most rod seals are of a relatively high durometer but not as stiff as an actual plastic like your describing. The wipers, on the other hand, are typically made of alot tougher material than the actual seals, and that, coupled with the shape is not condusive with the use of the tool DH suggests. That said I don't know of anyone making a tool to help insert a seal/wiper/etc made out of that hard of a material.

Now if it's actually a U seal of some description then the instillation tool DH recommends can't be beat. I spend alot of years putting seals in with no tool, and when those came out I would have given a mint for one as they make putting a seal into it's hole alot easier, especially when it's a small diameter seal going down into a hole your fingers won't fit in.

With all of that said, the harder seals will typcally benefit from being soaked in HOT water to soften them up a bit before putting them in. Too, there are small diameter buffer seals (don't figure that's what you have as they typically have an oring energizer in the groove behind them)that need to be prestretched before installing it in the bore. Failure to do so on those will typically end with the seal being messed up when the rod is insterted through it.

Hope this helps and good luck.

I've had the set, like in "DH from Carolina's"
Photo for 30 years..works great..got them from
Martin Fluid Power. (google: Martin Fluid Power0

I've had the set, like in "DH from Carolina's"
Photo for 30 years..works great..got them from
Martin Fluid Power. (google: Martin Fluid Power)