Hydraulic motor direction

[Monkeybusiness]

Evening all.

This motor is fitted to a flail - is there any reason why I can’t reverse the direction of the square plate on top which is held in place with lock bolts (which I assume is controlling direction) to reverse the motor?

The flails are reversible and need rotating - it would be a lot quicker to simply reverse the motor direction if it’s that simple.

Let the piss taking at my limited hydraulic knowledge commence!

 

[CPS]

Swap the hoses on the motor

 

[Mick-the-fitter]

Remove the plate turn it upside down and refit it In theory reverse the plate direction! But as CPS says swap the pipes around!

 

[Monkeybusiness]

Remove the plate turn it upside down and refit it In theory reverse the plate direction! But as CPS says swap the pipes around!

Swap the hoses on the motor

Is that ok on this swash plate motor? I don’t doubt you but want to be sure as these things are black magic to me!!!

 

[Monkeybusiness]

Better pic - it looks like a direction/flow controller locked into full flow one way to me. Can’t it just be swapped the other way?

 

[Mick-the-fitter]

I can’t see why it can’t be locked in the opposite direction! As long as you don’t have non return valve in line!

 

[Monkeybusiness]

I can’t see why it can’t be locked in the opposite direction! As long as you don’t have non return valve in line!

Will have a play and report back…

 

[Shovelhands]

Will have a play and report back…

It might just adjust from zero - flat out, rather than going in the opposite direction? But you’re not going to know unless you have a play.
Never seen a motor setup like that. I guess it’s so the speed can be optimised and tapered back if there’s too much flow?

 

[Gecko]

What ever it was you ran over, you know you can't un-mow it - right?

 

[Monkeybusiness]

What ever it was you ran over, you know you can't un-mow it - right?

I just want a vague idea of what it looked like before I get the glue out…..

 

[Monkeybusiness]

It might just adjust from zero - flat out, rather than going in the opposite direction? But you’re not going to know unless you have a play.
Never seen a motor setup like that. I guess it’s so the speed can be optimised and tapered back if there’s too much flow?

Turns out that’s exactly what it does - currently set to maximum beans, adjusting it just slows it down.
@CPS - I’m not sure switching hoses will do anything as it doesn’t spin backwards on the 2-way service (I assume it just dumps oil through the case drain).
Stupid game, I should have just pulled the flails off from the start!

 

[CPS]

Turns out that’s exactly what it does - currently set to maximum beans, adjusting it just slows it down.
@CPS - I’m not sure switching hoses will do anything as it doesn’t spin backwards on the 2-way service (I assume it just dumps oil through the case drain).
Stupid game, I should have just pulled the flails off from the start!

Does yours have the valve with the case drain plumbed into? This makes it one way. Swapping the hoses at the motor should swap direction.
As long as the motor doesn't have P and T on the ports I think it should be fine

 

[Monkeybusiness]

Does yours have the valve with the case drain plumbed into? This makes it one way. Swapping the hoses at the motor should swap direction.
As long as the motor doesn't have P and T on the ports I think it should be fine

No - the case drain goes straight back directly to the machine/tank from the side of the motor.
There is nothing on the ports.
This mulcher was put together for me, this model wasn’t available with a piston motor. I spec’d it this way to try and have something that worked on both the 2.7 and 6 tonner. It’s actually not amazing on either (but goes like f**k on a 13 tonner!). The end serial number on the motor is 001 which suggests I’m the test pilot - the top plate on the flail has been ‘hand modified’ from new to make it all fit together…

 

[Gecko]

The label says it's bidirectional - you're in luck!

https://bondioli-pavesi.com//download/pdf/398SCM010EN00.pdf

 

[Monkeybusiness]

The label says it's bidirectional - you're in luck!
View attachment 46230

https://bondioli-pavesi.com//download/pdf/398SCM010EN00.pdf

It doesn’t move if I send oil back through it on the 2 way service on the digger though. Very confusing snake-oil-machine…

 

[CPS]

It doesn’t move if I send oil back through it on the 2 way service on the digger though. Very confusing snake-oil-machine…

Should be bidirectional

 

[Shovelhands]

It doesn’t move if I send oil back through it on the 2 way service on the digger though. Very confusing snake-oil-machine…

Have you not got it running a free flow return?

 

[Monkeybusiness]

Should be bidirectional

It definitely isn’t - when reversed it does nothing other than pressurise the reverse feed line from the machine to the flail, doesn’t appear to even move the case drain line. Does the block into the unit have a 1 way valve possibly that I could bypass?

 

[Gecko]

"The book" shows the manual control version as the simplest inside.
Looks like it's worth swapping the hoses and seeing how it behaves.

 

[Monkeybusiness]

Have you not got it running a free flow return?

On the Takeuchi yes, on the bobcat no (it doesn’t have the option). On either machine when not on free return it doesn’t do anything on ‘reverse flow’. I think there must be a one-way valve on a block as the hoses enter the machine, which this motor doesn’t actually need (but the standard setups probably do).