On Bobcat s 300 skid steer hydraulics lock up,stop engine and restart and hydraulics work,whats the problem?

You might need to remove the fuel tank and clean the strainer at the bottom. I had this happen to a 773 skid steer. Damn workers wanted some time off of work so they pushed a couple of handfulls of leaves into the fuel tank. It was a nightmare getting them back out.

I recently tried
the DIY service and repair manuals from a website and it actually helped me repair transmission problem in my jcb 3cx site-master. It would'nt move forward or reverse, engine was good both solenoids for forward and reverse worked, but still couldn't diagnose the problem.
I don't have much technical knowledge but I just followed it step-wise, and now it works perfect! covers wiring, codes, diagrams, torque specs, PCV, everything
got it from www.reliable-store.com

Bobcat 873 Skid Steer Actuator

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I have only old skid loaders but when wiring a switch from wires being cut, just connect all the same color wires to each other. The wiring is color coded so it shouldn't be a problem there. As for the hydraulic system, don't run the engine with no hydraulic oil or you'll burn up the pump. It's happened to me and pump had to be replaced. Check the hydraulic oil for full.

4,600 lbs 2086 kg
Bobcat 743 Skid Steer Loader

The hydraulic fluid is ordinary 10-30W motor oil.

off hand --check for a failed oil filter in the hydraulics blocking the return lines from the pump and valves

in bobcats /skid steer loaders there are a multitude of safety micro switches that have to all work to get motion the main one is on the bar that locks the operator in the seat, there may be one under /in the seat It would be best to have a service technician call to fix the fault

Bobcat 600, 600-D, 610, 611 Skid Steer Solution Handbook Download! br This Bobcat 600, 600-D, 610, 611 handbook is a detailed data and it is cited clear detailed instructions. Bobcat, Melroe, Clark, Ingersoll Rand 600, 600-D, 610, 611 Skid Steer Loader Repair Shop Repair Service Manual.

Bobcat 600, 600-D, 610, 611 Skid Steer Service Workshop Manual

ABS is anti-lock braking system. It is a range of four sensors which monitor the braking capability when you apply the brakes. If you are harsh and stamp on the brake pedal there is a risk of the wheels locking up and sliding (screeching from the tires).

The ABS sensors modulate the brake caliper pistons andapply and let go the brakes very quickly. This stops the tires from skidding and you will feel a pulse through the brake pedal as the hydraulic system is forced to release the pedal slightly for a fraction of a second.

As ABS stops your car from skidding it allows you to turn the steering when you are braking hard. This is good news for avoiding accidents. If you lock the wheels on a non ABS car, you continue in the direction of the wheels - unless you release the brakes and reapply quickly (same method as ABS) this is called cadence braking but when involved with a potential accident the last thing on people's minds is to release the brake pedal. Having only owned older cars, cadence braking is one method I've learned, especially from driving in the snow.

I hope this helps you and please vote for me :)