Meter Sensing Control Valve question

IslandTractor · Nov 15, 2005

Does the MSC valve on the CK20 HST affect operation of the BH which is run through the power beyond hydraulics?

I find my BH controls to be fine except for the side to side movement which is a bit too fast unless I very carefully feather the control. I would love to just decrease the sensitivity of that one control function. Is the MSC valve likely to help? (I cannot check for a while as I am 70miles from the machine).

Thanks,

Ed

KiotiJohn · Nov 16, 2005

I don't think that would make any difference. All of them I've seen, including mine, had this fast swing boom, and it does take some getting used to. It will slow down if you use two functions at the same time. That may help you some. Try curling the bucket at the same time you swing, and it will be much more controllable.
John

IslandTractor · Nov 16, 2005

As there is rarely a need for "power" when simply swinging the boom, could I put some sort of flow restrictor into the hydraulics for left and right swing? I don't have any real experience with hydraulics so I don't know if that type of fix is possible.

psuedofarmer · Nov 16, 2005

<font color="blue">Try curling the bucket at the same time you swing, and it will be much more controllable. </font>

this is exactly what i learned to do.. it makes a big difference. not only does it slow down the boom, it also positions the bucket for the next task.

if you learn anything more on a hydraulic alternative, let the forum know..

good luck
pf

VictorW · Nov 16, 2005

I tried the curl and swing at the same time and it does work. My problem came when the bucket was at the end of its travel before I was done with the swing. It will really start to take off. I just learned to feather the controls a little better and be ready to ease up on the swing when the bucket is done.

A restrictor plate would definately slow the flow. Is there any suction from the hydralic pump or does the oil just flow back into the sump? I was just concerned about a drop in pressure after the plate if there is suction. If none, that might be an answer.

IslandTractor · Nov 16, 2005

My problem is ignorance of hydraulic theory or practice. I can use a wrench but some how dealing with hydraulics is like dealing with electricity. Plenty of trouble if you don't know what you are doing.

IslandTractor · Nov 16, 2005

Maybe I need to spend a week or two digesting this: US Army Hydraulics Manual

There is a section about a pressure reducing valve but I cannot tell if that is overkill for what I would like to do. What about inserting a short section of constricted fitting sized to cut the pressure or flow in half. I don't yet understand if such a restriction would interfere with other parts of the hydraulic system.

Dmace · Nov 17, 2005

Could you just make a little metal plate that can bolt to the lever housing that would restrict you from moving the lever all the way to the side yet still allow full movement forward and backwards for the boom stick control.
Hopefully that made sense.
This way it can be removed or adjusted as needed. Putting a flow restrictor inline is kind of dangerous and will slow your boom stick operation as well.

KiotiJohn · Nov 17, 2005

I only know that flow restrictors can, in some cases, be used. Hydraulics is certainly not my forte either. I still recommend simply using two functions at the same time until you get handy at feathering as I have. You'll be surprised how rarely you'll bang the swing after just a little while.
John

MadReferee · Nov 17, 2005

If you want to install a flow restrictor for a valve function you install it in the line from a spool's work port to the cylinder. You can also reduce the diameter of the work port hoses for that function and get a similar result although not as great. Putting a restrictor in one spool's work ports will have no effect on any of the other spools functions.

There is no "suction" on work port lines. Fluid is exhausted on one side of the work port back into the valve body where it is directed to the outlet port and back to the tank. This also applies to pto driven backhoe hydraulics.

Restrictor fittings are very inexpensive and readily available at most places where hydraulic fittings are sold. You want one that restricts flow evenly in both directions.