I would like to use the rear controls for top 'n' tilt and add a 3rd function for a grapple. I would love to save some $ and buy parts, rather than a 3rd function kit. Anyone know of a parts list, DIY blogs, etc. for adding a 3rd function from parts rather than a kit?
1. The Kubota 3rd function kit I had included a hidden flow restriction.
2. This isn't an issue in practice.
The grapple function never worked faster than I could handle. Now, realize I was using a GST tractor. I rarely set the rpm very high and used the foot throttle to maneuver the tractor and speed up the hydraulics when necessary.
Don't know why avc8130 grapple was slow.
Cylinder Speed single cyl
Bore Size 2 inches
Rod Diameter 1 inches
Pump Flow 11.8 GPM
Extension Speed 14.5 inches per second = 1.25 sec
Retraction Speed 19.3 inches per second = .93 sec
If the valve is sized for the flow in GPM, any type valve will run the auger.
You can use a selector valve, a true 3d function, or remote valve.
Surplus Center - 12 VDC 10 GPM OC DA SOLENOID VALVE
Surplus Center - 1 STATION DO3 SUBPLATE OPEN CENTER
Selector/diverter valve for grapple.
Surplus Center - 12 VDC 13.2 GPM SAE 8 DOUBLE SELECTOR VALVE
Plus hoses, wire and switches.
Thanks JJ! You da man! :thumbsup::wave:
I can't argue with the math, it is sound. Again, I didn't usually run the grapple at full rpm. I also had 2 cylinders on my grapple.
It could also be noted that Everything Attachments, WR Long and Kubota all sell 3rd function kits. I don't believe ANY of them have any flow restriction. Lots of happy users on these forums and I don't see anyone complaining about how fast their grapples operate.
I had brought this up a few months ago, and you mentioned that a relief valve should be used when running a Closed Center solenoid 3rd function with a motor: