Bobcat 331 hydraulic lines

Wiring schematic, but the dump box is not a optional extra from bobcat is it?

https://autoepcservice.com/product/bobcat-utility-vehicle-3400xl-electrical-schematic/

Basic wiring of linear activators.

https://www.progressiveautomations.com/blogs/how-to/12-volt-linear-actuator-wiring

Bobcat Contact and Tech Support.

https://www.bobcat.com/na/en/company/contact

https://www.google.com/search?q=Bobcat+3400+dump+box,+wiring+diagram&

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Check out the filters,and is the proper weight oil for the hydraulic been changed lately and refilled with correct oil. May have air in the line as well, bleed the line

A couple hours labor at most, probably $200-$300 or so. You can do it if you're mechanically inclined quite simply as long as you have a good work area to do so safely, I've done it a few times and I'm no Bobcat Specialist, just had to get it done in order to fix it because I had no choice! It's not bad at all!

The bobcat S250 is a complex machine. Saying it could be 1,000 different things is under the possible problems. Need much more info. Turn on a light or some thing that will draw current from the battery. Test for a voltage drop across every connection starting with the battery terminals. work your way to the computer. Find out on line or the dealership if there is a switch or relay or fuse before the computer. Then tell us what you find out.

unlikely that it will be clogged
May be blocked by the build up of alge growth caused by condensation in the hot tank as it cools down
most pick up lines ar screwed in the top so disconnect ant hoses /lines to that point then unscrew it out
If you have a black slime like substance on the end , remove the tank and have it cleaned out with steam then use a diesel fuel conditioner to clean out the ,lines and pump
never allow the machine to sit with less than 3/4 tank of fuel to prevent a reoccurrence of the alge

Might check the fuel pressure, might have a plugged screen in the pump inlet or a weak pump.

Check for a broken oil cooler line or a hole in the flex hose

to replace hoses on hydraulic equipment you have to have all the parts in the relaxed position clean the area of the connections so that dirt will not get into the system.

that is the bucket on the ground, allowed to tilt forward

nothing can be held under hydraulic pressure

the engine should be shut off

use spanners to undo hose fittings (no hands)

ensure a safe work procedure and wear rubber gloves , eye ware ,face shield and keep hands away from connections ---oil under pressure can penetrate the skin and cause immediate death ---

once you have the hose disconnected replace it with a new hose

after fitting the new hose and tightening the fittings ,start the engine and cycle the hydraulics as this eliminates the air in the system

fixya has no Tractor/grader or HD equipment forum. SAD HUH?
good luck with help