Hydraulic Elevator Problem

Thanks for you information. The tracks beeb checked for any obstacle and even alignment. But it is all ok. This elevator was contructed by German contractor 25 years ago. We get 1 local service company here in Saudi Arabia but they can not find the fault. They are servicing another brand of elevator. They tell us only that may the chain or a piston of cylender is causing the problem but not specific which one or they are not sure too.

Maybe it's time for a new elevator eh??

OK so what information do you supply ? You state a problem, and a basic specification but WHAT manufacturer and WHAT model, and WHAT specific information do you provide ?? We cannot SEE we cannot TOUCH you ask us to IMAGINE ??

Perhaps you should imagine we gave you an answer it is written on the back of this post, do you see it ?

The problem can be solved by phoning the elevator manufacturer and arranging for a service call-out visit. It may even be a requirement of the premises' insurance company. If in doubt, place it out-of-service until this has taken place.

"Nike" applies. Make the call.

Have you checked for restriction in the guide rails and for bent piston rods. Also if there is a loss of seal between the piston head and barrel fluid could by pass and cause an hydraulic lock in one ram. Try isolating the elevator from the rams by holding the cage at the top of the shaft and running the rams with no weight on them. Good luck

Thanks prof peanut. The pistons are okay,no bending nor leakage. its work up to level 3. Only in level 4 which have problem when it reach between 3 - 5 inches below the landing floor level. sometime the other side reach the landing floor level but in other side it is still about 2 -3 inches below the landing floor level and the pressure switch is acitivated. Our pressure switch is set at 60 bar. but normal operation is only between 30-40 bar. this elevator is made by Guebauerr of Switzerland and they don't have agent here in Sadi Arabia. This was installed by German contractors back in 1988.

I am beginning to wonder of the rams are both the same length and if their strokes are long enough to reach the correct height. If you run out of stroke on one side and the other can keep extending it will cause a tilting of the cage. Again, the rams must be tested independent of the cage and possibly even one by one. Let us know how it goes.