I have a Linde E-18 purchased new in 2012. At 1300 hours (hours are accurate) it blew out an O-Ring in the manifold under the floor board. Once the repair on this was complete, a lift cylinder seal failed as well. This machine is operated in a clean environment and is not overloaded, or pushed to the max lift capacity.

Anyone have ideas why this is happening?
Lift cylinder has not been repaired, yet. How difficult is it to remove and put new seal in?

This was still under warranty period. However, I discovered that there is no warranty on hydraulics, drive train only.

For normal application, for this trucks, you should use ISO - L - HM 68 or HLP ISO VG 68.
I would suggest to care about the quality of the oil.
The hydrostatic transmission is very sensitive.

Anyway, it's rather strange for me thet the truck from 2003 (over 10 years old) has only 3800 hours. It means it worked
~ 350-400 hours a year.
I would check the real working hours (ask Linde service to check the value from the control module)
I would'n t be suprised, if the real working hours number was 4-5 times bigger.

Besides, check the pressure form the control valve section responsible for lifting/lowering.
The maximum pressure value from the tandem pump is ~ 230 bar. It's a reduced in the control valve to 170-180 bar (depending upon the mast type etc.) But anyway, even 230 bar shouldn't be so disastrous for the mast cylinders.

From the other hand, if we consider, that the real working hours can be much bigger, perhaps the seals just reached their lifetime.

That would be H2X392P. Thanks

I've seen this happen before on a Cesab when a technician put the wrong spec hydraulic oil in.

What's the first few numbers on the data plate so I can id the family type?

H2X ???

Ill have a look in the manual & see what the hydraulic pressure relief valve should open at.

A couple of thoughts... wrong type of hyd. oil, pressure regulator for hyd. circuit faulty over pressurizing hyd, circuit.