aczlan said,
JNHEscher said:
x2 on the check valve. Just have to be able to relieve the pressure from all cylinders. I'm thinking the shaft side of the cylinder on a dual-acting might make a good return spring if I plug it.
I would suggest using a up and down hose on the cylinder, that way if you park somewhere and the feet freeze to the ground, you can pull them up.
JNHEscher said:
I've been mulling over the best valve setup to use on this. Something simple that offers 4-way control. Swaying towards using the power steering pump to operate the system if I can make that work. It's gear-driven and uses straight 10 weight oil. Not entirely sure what the output pressure is yet.
Pressure is easy to measure, put a tee and a $15 gauge in the system between the pump and the valve, crank the wheel over to the stop and hold it there. Its probably under 3000PSI.
The bigger issue for valve sizing would be flowrate. What size are the hoses? If you know the hose size, you can use a chart like the one below to find the correct size:
Source:
https://www.ryco.com.au/technical/ge...ion-nomograph/
JNHEscher said:
Gotta brush up on my hydro valving. What would be ideal in my eyes is a control that can operate the cylinders individually and in pairs. Say, the ability to bump one corner when needed, but also lift both fronts, both rights, both rears, or both lefts in unison. Joystick control came to mind, but those require extra spools and I'm not sure one valve block would control all four cylinders. Kinda staying away from electric valves because of the jerky motion, but that may be just fine on a system of this size. Electric solenoid valving would eliminate a lot of hydraulic line length.
I would use electric valves (perhaps something like:
https://www.surpluscenter.com/Brands...lve-9-7987.axd ) and a restrictor orifice to control flow.
Then 4 SPDT momentary on switches at your "control panel" and a 8 channel wireless remote (such as:
https://www.amazon.com/Channel-Wirel...dp/B01GH7IK2E/ ) and you are good to go.
If you wanted to run front/back up/down together you could add a momentary on, DPDT switch switch and wire both solenoids at one end through it, for all down you would use a 4PDT switch or a SPDT switch with diodes to each corner (so that they cant backfeed when you just want to run one corner up/down).
If you ran solenoid valves off of your power steering system, you could run one bank up front and one bank in the rear (both before the power steering controls as there is no easy way to know if it can handle back pressure on the tank port of the power steering valve) which would greatly reduce your hose needs.
On the idea of a hydraulically powered fan, this looks like it would be a simple way to control hydraulic fan speed if you wanted to go that route:
https://www.surpluscenter.com/Brands...-9-5178-30.axd
Aaron Z