[Rescue11]

Originally Posted by hyperlightboards48

I was able to run the pressure tests tonight. Running with no load spec is 200psi max, I was just shy of 200psi. With load the spec is 500-625psi i hovered right around 600psi. I did another test with 200lbs in the bucket and watched the gauge to see if it dropped off but it stayed consistent at 600psi.

The comment about 1000lbs off the rear end I think falls inline with what the loader is currently lifting considering the weight of the loader + the 200lb load and considering the geometry of the front lift compared to the rear lift seems to make some sense maybe??

Well, you are in range with factory setting.

Yes, geometry, cylinder bore and stroke, and hydraulic pressure all effect the lifting ability. Cylinder angle can drastically effect your ability one way or another. Same with pressure and surface area (bore) respectively.


Your loader seems to be modeled after a loader built for G/T's. Since you are trying to run the attachment at less than half of the psi typically supplied to these units by means of a aux gear pump, you will only have less than half of the results. This is known now from your test results.

You can shem the relief to get more pressure. My 1864 runs 800-850 psig or 864.92psia

However, this can shorten the life of the charge pump if you are constantly working at relief pressure. Have been told by a very smart dude once that 1000 psig is attainable, but the life can severely shorten particularly if you are constantly loading the piss out of the hydraulic system.

Your going to need larger bore cylinders to continue using the hydro pump, or use a gear pump and do all the plumbing.

(Edit: I agree with everything Jmech said, but the pressure seems a lil high!)