Get the online parts manual

Speaking to someone in the trade today who had a similar problem some years ago & it turned out to be a tight spot caused by the chrome being slightly out of true. I now think this is more than likEly
the fault because any air trapped would surely have found a way out by now

That may be the problem. Find out exactly what valve they replaced. If the accumulator valve malfunctions it can cause all kinds of problems.

It is a telescopic type ram.Unfortunately I don't even have the truck serial number but it could be the internal
valve thats faulty because the company who overhauled the cylinder said they had to have one made after stripping the unit

In thinking about your lift, what is the complete serial #, including the letter at the end? Could be you have an accumulator style cyl with a malfunctioning valve at the botton of the ram? The accumulator style of cyl has no bleeder.

I would still investigate if the upright is sticking as I've never seen air cause a staging issue. Is this s telescoping cyl?

"The outlet is about an inch below the top ,brass securing ring on left hand side and configured so that the threaded internal port
is pointing down and parallel to the cylinder."

This sounds a lot like a bleed back port to me, they used to use them on old cylinders in case the packing inside had any bypass and fluid got on top of the ram inside... when the piston got to the top of the stroke it would allow the excess fluid to go back to the tank... which is what i was talking about earlier on some older lifts. They would have a return hose that went back to a port on the tank.
So definitely a manual would be very helpful.

i checked at our shop and did not find anything this old there... sorry about that...
Wish i would have found something...

Good luck

No problem,been on going for 5 months now

If you can wait until Monday, I can take a look at one of these old S30A models and maybe come up with a idea how to bleed it.

Thanks for the info guys.The outlet is about an inch below the top ,brass securing ring on left hand side and configured so that the threaded internal port
is pointing down and parallel to the cylinder.As such,if a screw were
fitted it would not actually enter the inside of the cylinder body.
The hydraulic company who did the overhaul are now saying that the fault is not their concern & want payment from me.(although they have not seen the truck in action)My customer isn't going to pay until it's right so any information from a Hyster manual would be great.
Hard to get information in the UK since Barlows closed

when you say you found it on the cylinder shell but the port is blocked? where at on the cylinder shell did you find it? Was it near the top of the shell where the gland nut screws on?
How close to the top?
if it was within a couple inches from the top then that may be a set screw and not a bleed port, some of these old cylinders had set screws that were designed to hold the packing nut in place so it couldn't back out.
Usually if there is a bleeder in the shell it will be several inches down from the top of the cylinder shell but in most cases it is in the top of the ram.

I am going down toward the shop tomorrow, i'll look around and see if they happen to have any old manuals there for this model.
If they do i'll **** it up and scan the parts page diagram for you.

In reading the thread I see the staging is off. I don't think air in the cylinder is your problem. Does your lift have rollers between the channels or is it a slider upright with brass wear plates?

Why is the cylinder unusable? It'll be bouncy for a while until the air bleeds out on its own. Might take awhile but not a big deal.

Wish I could but the fiche is so worn out that it does not print off so you can read it.

Any chance that Partsguy5 can e mail me
an image of microfiche page showing the air/bleed
outlet on cylinder body as I need to prove that the
guys who did overhaul should have cleared this to
make it useable.Thanks in advance