Yes everything moved freely with no visible damage.Did everything moved freely and no damage visible?
So when the return line goes through the proportional directional control valve, I assume that the return line is one of the big beefy lines either forward or reverse line?The return goes to tank, but it goes THROUGH proportional directional control valve.
That valve ( MCV Main Control Valve ) is primarily Directional, I.e. changing direction of movement, the question of weather it is Full ON/OFF or proportional comes secondary. But we just like to call it MAIN Control Valve without specifying what type. They can also be open center or closed center, load sensing or non load sensing and have boat load of different actuation methods and combination of those and whole lot of different things.
Yes, you switch them around by moving MCV spool.So when the return line goes through the proportional directional control valve, I assume that the return line is one of the big beefy lines either forward or reverse line?
So I may have to reverse the sleeves over the Pistons in the counterbalance valves in the attached picture? I can't remember which direction they were when I took them out LOLAnother thing that can bypass is counterbalance valve through those internal parts, pilot lines to tank. Got to pay attention to all the spoils and O-rings. Although internal crack is very much possible!
Are those two was in the same cavity?So I may have to reverse the sleeves over the Pistons in the counterbalance valves in the attached picture? I can't remember which direction they were when I took them out LOL
I suspect the top one in each picture is the more correct configuration since if it was the other way, part of the O-ring would be in the path of the incoming fluid in the cavity.
View attachment 201988 View attachment 201989
No they are not in the same cavity, they are in separate cavities. Each one is in a cavity for each dynamic Drive brake counterbalance valve.Are those two was in the same cavity?
If they were, it is shuttle valve ( why it is so big I have no idea), shuttle valve supposed to close the passage between low pressure inlet to speed shift/park break passage, leaving only high pressure side connected, and when you reverse direction - switch everything to another side.
You noticed that barrels have different ends, I think one goes inside block to blind end, another to cap end. Put it’s for you to figure out which goes where.
I don't know if it bypasses or restricts. Since I have one of the outlets on the pressure gauge and capped off, and the other three Outlets capped off, I'm wondering if it's possible that part of the hydraulic flow is going back through one of the two Inlet beefy hoses that is not engaged? And if so, where would that fluid go if the proportional valve was already directing fluid to the other valve block Inlet line?Does it bypasses or restricts?
Damaged counterbalance valve, not fully seated shuttle valve will bypass to return side, how to check it - I already posted that. Still very interesting that it cuts pressure in half!I don't know if it bypasses or restricts. Since I have one of the outlets on the pressure gauge and capped off, and the other three Outlets capped off, I'm wondering if it's possible that part of the hydraulic flow is going back through one of the two Inlet beefy hoses that is not engaged? And if so, where would that fluid go if the proportional valve was already directing fluid to the other valve block Inlet line?
Damaged counterbalance valve, not fully seated shuttle valve will bypass to return side, how to check it - I already posted that. Still very interesting that it cuts pressure in half!
So, because there’s no ball two inlet ports and speed shift/park break passages just open to each other full time?!The schematic diagram would indicate a steel ball in the shuttle valve, but there was no steel ball in my shuttle valve, just a small 16th of an inch drilled hole connecting the two Inlet ports and the shift cylinder and parking brake circuits. I don't see where you gave instructions on checking the shuttle valve?
That being said, I'm thinking of checking the pressure to the outlet big beefy lines after removing internal parts from the valve block one by one, and so I am thinking about starting with removing the flow divider valve completely and see what that does to the exit pressure?
So, because there’s no ball two inlet ports and speed shift/park break passages just open to each other full time?!
I remember Grove menlift had that thing right underneath the 1/4 fitting, tiny little ball? You would have to shine your flashlight to see it! It was crimped over after it was dropped in there. So if you loos it you would have to re machine or replace the block! If that block not there - that is the problem!