Loader Massey Loader - No dual Function??

hamdog · Sep 25, 2018

I have a 2009 Massey 1660 with the DL130 loader. For some reason it will not curl and raise at the same time, its like the loader can only do one function at a time. Is this the norm for these loaders or is there something wrong with the loader valve. My John Deere's I have owned in the past the loaders could perform dual function with no issues. I have tried adjusting, performing loader work at high rpms, low rpms, etc. Do I need to replace the loader valve or is there a loader valve available that I can replace with which will give me the dual function? Thank you!

Grandad4 · Sep 25, 2018

There may be something wrong with the control valve. Someone familiar with your tractor (dealer?), should be able to diagnose.

A well-designed loader will allow combination movements like that, but performance and refinement varies among the different tractor brands.

oldnslo · Sep 25, 2018

Some models of valves perform dual functions better than others. Not familiar with Massey but were your JD models running closed center system while the Massey in open center?

atsah · Sep 25, 2018

My little 1705 Massey has the dual function, it's not as fast as I would like it but it does work.

hamdog · Sep 25, 2018

Oldnslo I’m not familiar of the open or closed system you are referring to.

roger4400 · Sep 25, 2018

I have a MF 1643 loader dl120 and it will do both action at the same time , yours might have some problems with the control valve. It should do both action.

hamdog · Sep 25, 2018

Does anyone know where I can buy a new valve that would perform both functions? Thanks!

Briar Hill Brittanys · Sep 26, 2018

Got this joystick for my JD 1020/37 loader. Works great. HTH. Mark.

2 Spool Compact 1 GPM Joystick Control Valve | Directional Control Valves | Hydraulic Valves | Hydraulics | www.surpluscenter.com

rScotty · Sep 26, 2018

hamdog said:
Oldnslo I知 not familiar of the open or closed system you are referring to.

I see this question a lot and I'm going to try to write a simpl explanation of open vs closed hydraulic systems. Let me know what needs improving
Keep in mind that OPEN circuit hydraulic systems are simpler and are what most .

Open circuit hydraulics are simple, cheap, reliable, and generally good enough. So open circuit type is what what medium sized equipment and tractors use. An open system doesn't store any pressure anywhere, it uses a FIXED DISPLACEMENT hydraulic pump running all the time to continually pump hydraulic fluid around the hydraulic circuit. This pump's fluid output volume and pressure are basically dependent on the pump/engine RPM. More RPM equals more flow which equals more potential pressure.

How an open hydraulic system works is that fluid is picked up from the hydraulic reservoir by the pump, and then pumped around a circuit to dump back in the reservoir. Most of the time there is no no pressure in an open system except a little bit due to the resistance of hoses and couplings - there is only flowing fluid, and a tiny bit of back pressure. There isn't any pressurized fluid that is deliberately stored anywhere.

So in an open circuit system if no control lever is moved what you have is just a constant stream of hydraulic fluid being pumped around an endless circle. To do work, the control valve lever is moved, which does two things: It blocks the return path and diverts the flow of fluid to a cylinder. All of a sudden there is a lot of resistance to fluid flow and that resistance provides the pressure to move the cylinder. How many cylinders it can power at once depends on the gallons per minute that the hydraulic pump can produce. For more gallons/per minute just increase the engine rpm.

Depending on how well the open system is designed, it may or may not have a slight time lag from the time you move the control valve to the time that the cylinder begins to move. And depending on the designer and how long the path is that the fluid has to go to get to each cylinder it's possible that some cylinders will be preferentially filled over others. Normally this lag and difference is so small that it isn't even noticible.....but it's there.

Now in a CLOSED HYDRAULIC SYSTEM, things are different and more complicated, more expensive and maybe/maybe not better. A closed system has a VARIABLE DISPLACEMENT hydraulic pump, a tank to store some pressurized fluid, and the ability to sense the pressure within the system.

The hydraulic pump in a closed system being the complex variable displacement type, it can pump a lot of fluid or just a trickle depending on what it senses that the control valve is calling for. If no work is being done, this variable displacement hydraulic pump only pumps a trickle ... just enough to keep a high pressure fluid storage tank filled so that fluid is immediately available. If several control valves are being opened simultaneously then the initial fluid comes from the storage tank while the variable displacement pump quickly changes itself into a high flow pump to provide enough flow and pressure everywhere. When the control levers are moved back to neutral and there is no more call for lots of flow and pressure then the variable displacement pump automatically goes back to trickle mode.

So the CLOSED system conserves engine power and efficiency because unlike the OPEN system it is not constantly pumping lots of fluid. The closed system also has a bit better response time and usually can do more things simultaneously. It costs more and is more complex. In the tractor world, John Deere tends to use the closed system on medium sized and up tractors, but most manufacturers use open systems.
Enjoy,
rScotty