Well I have nearly thought this auxiliary rear SCV plan through. Just a couple of areas that I have not yet come to grips with what I have to do to make it work.
Two potential plans for your comments. I require 3 additional SCV (spool valves, SV) for use. I do not plan on using my JD 3rd SCV as it is reserved for front end 3rd function use. In both plans the control valve would be mounted on a 0.25” or 0.37” steel plate apparatus U-bolted to the ROPS using the same type U-bolts that JD uses for the canopy.
Plan 1 uses a stackable Prince SV control valve.
Plan 2 uses a Wolverine WVS series monoblock control valve. Since it does not have growth capability without doing a complete R&R it is planned as a 4 spool monoblock so that I have a spare SCV for any future growth that might come up.
PLAN 1 – Use a stackable Prince SV Control Valve 12 gpm nominal. Item 9-7556 9SV-3-X-BBB (I believe the inlet and outlet section are covered by the X valve option) $89.95+3(67.95) = $293.80 plus fittings
Measurements are 8.625”x8.75”x3.25” and weighs 29# (36# for 4 valves) http://www.surpluscenter.com/item.asp?catname=hydraulic&qty=1&item=9-7556
Growth could allow a 4 spool similar to Item 9-7557 9SV-4-X-BBBB but would not be the initial plan. Could add one addition spool valve for $67.95 at later date with longer tie rods to initial spool. http://www.surpluscenter.com/item.asp?catname=hydraulic&qty=1&item=9-7557
-Spacing between ports A & B on each valve is 2.18” adequate to put couplers on spool valve without hassle( see con for spacing between spools however)
-Slightly more expensive for same number of valves
-Heavier than monoblock valve for same number of spools (3 spools weighs 29#; 4 spools weighs 36# vs 20# for 4 valve monoblock)
- Slightly thicker and the 3 SV is roughly the same size as the 4 valve monoblock
-Spacing between ports on adjacent spool valves is 1.44”. Minimum required distance between center of ports for female hydraulic couplers is 1.625”, too close for couplers to fit w/o issue. If kept it at 3 SV then straight fitting on center valve and 45 degree out on first and third valve but this would prevent growth of fourth valve.
PLAN 2 - Use a 4 spool 14gpm Prince WVS series double acting directional control valve. Item 9-7978 WVS41BBBB5C1 (http://www.surpluscenter.com/item.asp?item=9-7978&catname=hydraulic
) which weighs 20 lbs. measurements are 8.56”x8.06”x2.75” Cost $350.95 plus fittings etc.
-Slightly less expensive for same number of valves
- Lighter by 9 lbs than the stackable 3 spool and 16# lighter than the stackable 4 spool.
-Not flexible for growth
-Spacing between Ports A & B centers is 1.34.” Spacing between ports on different spool valve ports is 1.42.” Minimum required distance between center of ports for female hydraulic couplers is 1.625”, thus need to devise method of spacing out couplers. If only used 3 spool valve monoblock, then could take left valve (#1) with 45 degree fittings angling at 10 and 8 o’clock, center valve (#2) using 45 degree fittings angling at 12 and 6 o’clock and right valve(#3) with 45 degree fittings angling at 2 and 4 o’clock could get adequate clearance for the couplers. Problem is I wanted to do 4 valves; how to handle the spacing. I am stumped without relocating the connectors and using hoses to get from the valves to the couplings (create a rat’s nest of 8 hoses)
I would like to avoid relocating the Couplers to a different location from the valve and using hoses to get there. 4 valves, 8 hoses = rat’s nest .
I would like to keep the Couplers in some neat array and not look like a oil field xmas tree.
I looked at Kenneyd’s pictures but with only two spools he did not have the problem as I see it.
Unfortunately right now I see no option other than relocating the couplers with the corresponding hose issue. That might let me move the valves somewhere else but I like the idea of having them on the right ROP as I look back at an implement. Does anyone know how expensive/difficult it would be to make short steel hydraulic lines of 6-8" max to go from the valves to a coupler plate a short distance away?
Ideas are welcome