Rear Remotes

[skipjobe1]

I just bought a David Brown 60 HP tractor to run a stump grinder. The tractor has 5 remote hydraulic lines the stump grinder has 4, how do I determine which to choose, can I cause damage if they are reversed? Thanks.

 

[MtnViewRanch]

Can you post a picture of the rear setup? Being an older machine, a lot of us are not familiar with what you have, but a picture can be worth a thousand words. I'm thinking that you have 2 sets of rear remotes and 1 return to tank line, but sure would like to see it.

 

[skipjobe1]

Yes thank you I will take a picture when the sun comes up. I have it set up on one tractor and need to move it to another tractor.

 

[skipjobe1]

Here is the MF 30B that the machine was hooked to.

 

[skipjobe1]

Here is the David Brown I am able to get about 2 inches of movement on the rams.

 

[J_J]

What is the purpose of the 4 hoses . cyl or motor.

What is the purpose of the disconnected QD in the center?

Since you are only getting about 2 in on the cyl, it sounds like a QD is not being used correctly.

Is there a SA cyl in the system?

 

[rambler]

Hyd cylinders hoses come in pairs.

One hose extends the cylinder, the other hose retraqcts it.

(Rarely any more is the single acting cylinder, you only use the 'extend' hose, gravity will push the oil back out as the cylinder retracts & pushes the oil backwards through the extend hose.)

Your tractor with 5 ports must then have something odd - the 'etra' port is for something unusual.

Your implement must have 2 'action' things, and the 2 hoses from each need to be propertly paired to the 2 ports on the tractor that make it go up or down.

I think a manual for the tractor and a manual for the implement will sort it out.

Anything we say is just guessing.

I could probably figure it out if I were there in person, but lobng distance, this is difficult to sort out.

You likely won't hurt anything - hyd have pressure reliefs, so you shouldn't hurt it testing it, but if it doesn't work right don't keep onusing it!; but sometimes that 'extra' port on the tractor has a special use and you could possibly mess things up - rarely but possible - if you use it wrong.

--->Paul

 

[J_J]

He has already said the cyls only move about 2 in.

It sounds like the fluid from the valve has no place to go and therefore is blocking the flow.

A single QD half will block flow.

 

[mlauk]

I only see 3 lines coming out of the control valve. Where are the other 2 lines coming from? I would guess you have a single acting 3 spool control valve which was used for a batwing. The MF tractor has a double acting 2 spool control valve. You might need to buy a new control valve to operate the stump grinder.

 

[boggen]

follow each hose, and figure out were it connects to on each end.

you will have, valve, hydraulic tank, tees, hose, quick connect on rear.

hydraulic tank, on older tractors may be the transmission or rear end of the tractor.

below is just blah blah blah. maybe it will spark something. for you to figure things out.

==================

double acting cylinder....

extend outlet -- cylinder -- contract outlet cylinder --rod that comes out

to extend a double acting cylinder....oil goes into the extend outlet and oil comes out of the contract outlet on the cylinder.

to contract a double acting cylinder....oil goes into the contract outlet and oil comes out of the extend outlet on the cylinder.

================
a single acting cylinder

outlet -- cylinder -- rod that comes out.

to extend a single acting cylinder oil goes into the outlet of cylinder and rod extends out.

to contract a single acting cylinder, oil comes out of the outlet on the cylinder and rod contracts back into cylinder.

===============
old tractors more likely have single acting valves, vs double acting valves.

single acting valve to extend a single acting cylinder....
oil tank -> pump -> single acting valve -> outlet on single acting cylinder (rod extends)

single acting valve to contract a single acting cylinder.

outlet on single acting cylinder (rod extends) -> the single acting valve lets oil go directly back to oil tank.

if you use a single acting valve, with a double acting cylinder. most will only hook up the "extending" end of the cylinder. and then rely on gravity or weight of the equipment to contract the cylinder.

================

a double acting valve, is kinda like a 3 way valve,

while a single acting valve, is more like a ball valve, oil goes in, oil goes out.

on a 3 way valve, you control how much oil goes to which hose.