Ive got a farmall 460 with a davis loader and installed its own joystick control with its own relief valve, originally had it plugged into one outlet under hood but wanted to open up both outlets to run round baler so i tapped into big supply line coming from pump to feed my joystick control and returned oil right back into top of resevoir, but this still only works with one control valve locked in on tractor, im sure because the two relief valves are hooked in parallel with each other and path of least resistance is to bypass via relief valve on tractor. Is there any easy solution to this so I have an equal to like power beyond or just get used to locking in tractor valve whenever I want to use loader?
- Thread starter classicxl
- Start date
Janicholson
Well-known Member
Well the issue is that the tractor has a demand driven hydraulic system. It is not open center, it is not variable displacement.
The pressure depends on a pilot orifice (with screen) to determine flow rates (after the powersteering priority system).
This little orifice and regulator valve device unloads the pump unless there is demand down stream from the regulator, in which case the valve opens and allows system pressure to flow to the hand lever control valves. The locking of the valve is your only real answer. other than a power beyond (recommended), or a PTO driven pump for the loader (and cylinder struts to keep it up when the PTO is used for baling). Jim
The pressure depends on a pilot orifice (with screen) to determine flow rates (after the powersteering priority system).
This little orifice and regulator valve device unloads the pump unless there is demand down stream from the regulator, in which case the valve opens and allows system pressure to flow to the hand lever control valves. The locking of the valve is your only real answer. other than a power beyond (recommended), or a PTO driven pump for the loader (and cylinder struts to keep it up when the PTO is used for baling). Jim
Allan in NE
Well-known Member
Naw,
Just use an 18" extension thru the PTO pump and hook your baler's pto behind it.
Allan
Just use an 18" extension thru the PTO pump and hook your baler's pto behind it.
Allan
You just encountered the limitations on that style of hydraulic system. Power beyond won't work either because you have to activate the regulating circuit to put system on demand. Never heard or saw a power beyond attachment on that system. Do you have fast hitch? Three valves?
You could install a diverter valve hooked to one of your aux valves so you could select either loader or use of all aux valves as needed. More rather unsightly hookup of course.
You could install a diverter valve hooked to one of your aux valves so you could select either loader or use of all aux valves as needed. More rather unsightly hookup of course.
armand tatro
Well-known Member
If the 460 is like the 560 you cut the steel line coming from the hyd. pump(pressure line) AND WELD A male pipe fitting to steel line coming from the pump, attach a hoes and go to the inlet side of the joy stick. Attach another hose to the out put side of the joy stick and hook it to a female pipe fitting welded to the piece of steel line that is attached to the hose that goes to the bottom of the hyd. control manifold on the tractor This will give you power beyond and no need to tie a valve dowm. ( that is a special fitting at the hyd. manifold on the tractor which is why you have to cut the steel pressure line and weld on the pipe fittings.) This will work because I have done it to my 560D and my M5 MM. Also I have seen it done to another 560 with a G. B. loader mounted on it. If you have any questions I will try to post some pictures tomorrow. Armand
armand tatro
Well-known Member
JIM: if THE 460 HYDRAULICS is the same as the 560 their is a separate power steering pump piggy backed onto the main hydraulic pump there for no need for a power steering priority valve. You can indeed get power beyond by cutting the pressure line and going to the loader joy stick than back to the tractor hydraulics( assuming the 460 hydraulics is plumbed the same as the 560). Armand By the way the M5 was easier to plumb because I was able to get adapt the MM fittings to pipe threads. No welding needed! Works sweet. I need to do this to an Oliver 88 in the near future. Armand
Cutting into the supply line, running it through your loader valve and then back into the tractors hydraulic system will work. Problem is, that any thing that comes out of your loader valve or cylinders will then go , unfiltered right into the tractor hydraulic system. It is a power before system, not power beyond.
Paul Janke
Member
I did this very thing to a 460. From the tractor pump to the loader valves (power beyond) then back to the tractor valves. The loader valve's return line is run in the top of the reservoir. The tractor's hydraulic filter is still in place. An additional spin on filter is in the return line from the power steering, so it only filters part of the oil flow at any one time through the system. I figure it gets all of it sooner or later.
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