Forklift Repair/Design Specs

As far as I understand the forklift may be a Hyster?

When you have a new cylinder, it should have the seals installed in it. If this is done well, there will be no leaks there.

Once you connect the cylinder it should expand when pressurized with oil from the oil pump through the control block with handle(s). Some cylinders have 2 connections for the hoses, others have only one plus a bleed valve on top to get rid of the trapped air - open this until the oil shows. (best with no load)

If the seals are a problem, you can also order these by the physical dimensions.

Hope this helps. d

When I read #7 to my husband he told me about using the lifts' internal pressure to separate the rod from the cylinder... he's just like that though. Also, he used the displacement of the oil in the cylinder to create vaccuum & suck the cylinder down into the ram. (Is it the ram? I think that's what he called it) Its a one man show around here so he creatively finds ways to accomplish things. The forklift is fixed.

One thing I really like about posting a Q here is being informed of the mistakes in my question! re: spelling of hyster/ clarifying which cylinder I'm asking about etc. You guys are so dang smart! The other is that you take the time to share some of those smarts with me.

Thanks for your help, rock on globalspec guys!!

Here one link for service manuals. It looks like a dvd+cd covering a lot of models of Hyster forklift equipment.

There are usually a few cylinders on a lift truck. By your reference to huge it's the lift cylinder. Repairs to the old cylinder could have been made. If I remember right the Hyster lift cylinder was a displacement cylinder. All the packing is at the top in the gland nut. That packing could have been acquired from a Hyster dealer or several on line after market parts sites. Intrupa is one that comes to mind. If available A packing and seal distributor in your area would have the individual seals they would need the old ones to match them up if the number that are usually on the seals are not there or legible. If the rod was damaged it could have been repaired also. There are places that specialize it straighten and re-chroming large cylinder rods.

Since the cylinder is missing you have no alternative to purchase another. A new one should not leak if installed properly. Or you could call around to some of the used lift equipment dealers they may have one. Get packing and repack it. Do replace the hose that goes to it. Years of service has most likely left the core rubber brittle and usually cracks inside when it's remove. The extended disconnection from the old cylinder does not help.

Can I just make you aware, you are proposing a fundamental alteration of what is "lifting gear".

In the event of failure you'll be looking for this place

Have you considered taking a photo of the machine and circulating it around "bone yards" to purchase used cyclinders of a similar machine. You should be able to get them and renew them for far less than new ones?? Depends on the value of the project, is it really worth the effort or just a wanna be task??? Woody Enjoy

It is a problem related hydraulic lift cylinders.Either change the entire repair kit like

piston,seals,'o'rings,buckets & check surface of cylinder bores of both the cylinders.

No sleeving is recommended in worn out cylinders. Pl. try to collect manufacturer's details to get proper feedback from the market.

i had a similar problem recently with an H80C , the seal kits were no longer available , and hyster use odd sizes to force people to buy direct off them instead of using aftermarket so i had them custom made ( $ 200 )

The original poster needs to know the assembly order , best to take a photo of the piston and cylinder cap / gland or take those in to a seal supplier.

I am in australia , so for anyone here doing the same you would go to Seal Imports Ltd or Hallite to have them custom made

i dont know who your equivalent companies will be in the USA sorry , but they will be able to look and suggest which piston seal , backing ring , piston guide ring , gland seal , wiper seal and O-rings where the cap screws on

:)

have a nice day

What city is the machine located in? I have several excellent contacts (which I use)for the NY and NJ area that specialize in power equipment and are not expensive... which of course I would send you "offline" as not to mis-use this site.