Hello,

I'm hoping this is a general enough situation to get some guidance. I'm familiar with alot of different machinery, but new to working on forklifts. This is an Elettric80 LazerGuidedVehicle. basically a 2 stage mast on a robot chassis using lasers and wall mounted reflectors in a warehouse. Italian machine and i have no hydraulic schematic

pressure transducer runs 23-55ish bar typically, but i've got one now that stays in range until the first stage tops out, and the outer cylinders start lifting the second stage. Bar shoots up to the 60s, then 70s, and if i set the auto stop at a location, the unit runs faster and the bar can hit the 90s at full speed. When in automatic mode, the system will throw alarm above 55 bar and shut it down

the pressure stays high even on descent.

I've found no damage to the mast or carriage, and the roller guides/bearings all seem to turn freely.

Also the sensor showing weight on forks reads that it's unloaded, so i dont think it's registering that type of resistance/weight.

The pump sends single supply hose to shut off valve/distro block at base of mast. the distro then divides flow to inner 2 cyls for first stage and 2 cyls outboard of mast for the second stage- nothing crazy or weird.

i just cant think of what would cause high bar only when operating second stage up AND down. Again, i'm new to these.

Any ideas on where to go from here?

thanks in advance,
Rick