Cherry picker hydraulics

[Kelvo]

Hi
New on here, Hoping this is the right place!

I have a cherry picker that I am trying to understand.

Underneath the main 'turntable'/base is a cylindrical 'device' (about 5" dia) which has an electrical connection and hydraulic pipes from the pump and to the reservoir's. The Electrical connections are not connected but the machine still seems to go up and down ok. There may be 2 other pipes connected inside the turntable (from the valve block I think but they just disappear down into the turntable/base)

What does this device do?

Also, on the ram for the lower arm is a block with what I assume are pocv's on the hard pipes. But the upper ram has flexible hoses. There is another block, with I assume pocv's but not on hard pipes so does this mean that the upper ram is not protected from hose failure?

Thanks in advance

 

[ACEngineering]

Hi
New on here, Hoping this is the right place!

I have a cherry picker that I am trying to understand.

Underneath the main 'turntable'/base is a cylindrical 'device' (about 5" dia) which has an electrical connection and hydraulic pipes from the pump and to the reservoir's. The Electrical connections are not connected but the machine still seems to go up and down ok. There may be 2 other pipes connected inside the turntable (from the valve block I think but they just disappear down into the turntable/base)

What does this device do?

Also, on the ram for the lower arm is a block with what I assume are pocv's on the hard pipes. But the upper ram has flexible hoses. There is another block, with I assume pocv's but not on hard pipes so does this mean that the upper ram is not protected from hose failure?

Thanks in advance

Your asking the wrong forum I doubt anyone here will be able to help.

Ask on a construction forum or an Access forum if one exists?

 

[Blue.]

Hi
New on here, Hoping this is the right place!

I have a cherry picker that I am trying to understand.

Underneath the main 'turntable'/base is a cylindrical 'device' (about 5" dia) which has an electrical connection and hydraulic pipes from the pump and to the reservoir's. The Electrical connections are not connected but the machine still seems to go up and down ok. There may be 2 other pipes connected inside the turntable (from the valve block I think but they just disappear down into the turntable/base)

What does this device do?

Also, on the ram for the lower arm is a block with what I assume are pocv's on the hard pipes. But the upper ram has flexible hoses. There is another block, with I assume pocv's but not on hard pipes so does this mean that the upper ram is not protected from hose failure?

Thanks in advance

What make is the machine?

Lots of manuals online,have you a pic of the cylindrical device.

 

[Highland Mule]

Some sort of levelling system?

 

[Blue.]

I was thinking of an accumulator.

 

[Highland Mule]

Actually, could it be a pressure sensor (wires) and a shock absorber? Need some photos or at least a make and model number.

 

[v8willy]

Could it be some sort of operator presence safety device that has been bypassed?

 

[agrimax]

Pictures needed please........Gotta be a rotary coupling in there.Could that be it?
No cv directly on the cylinder before the hoses would mean no burst protection.Might be a built in restrictor in the cylinder orifice that would slow down the drop speed if a hose burst though.

 

[astra]

Rotary distribution valve to allow for slewing???

 

[TripleSix]

@Kelvo

Post some photos of the offending parts...

 

[Still Farming]

Maybe safety devices for fail safe and balance etc too?