Oil pressure release jcb handler

Poorbuthappy

Member

Livestock Farmer

Location

Devon

• Jul 8, 2023

• #1

I have bought a 2011 531-70 agri super (sorry @ACEngineering !), but there's no handbook. I have down loaded 1 I found online, but still cannot find the way to release auxiliary oil pressure to disconnect the grab pipes. Operating controls with ignition on doesn't seem to work. I understand newer ones have a dump switch, but mine..?

It's the "thumbwheel" type joystick.
TIA

 

jondear

Member

Location

Devon

• Jul 8, 2023

• #2

Poorbuthappy said:

I have bought a 2011 531-70 agri super (sorry @ACEngineering !), but there's no handbook. I have down loaded 1 I found online, but still cannot find the way to release auxiliary oil pressure to disconnect the grab pipes. Operating controls with ignition on doesn't seem to work. I understand newer ones have a dump switch, but mine..?

It's the "thumbwheel" type joystick.
TIA

Click to expand...

Our 13 plate 536 didn't have a dump switch .
Just had to have engine stopped and key on aux on front and rock switch on joystick back and forth.

 

T

Tony1989

Member

• Jul 8, 2023

• #3

jondear said:

Our 13 plate 536 didn't have a dump switch .
Just had to have engine stopped and key on aux on front and rock switch on joystick back and forth.

Click to expand...

If that doesn’t work it will be the accumulator

 

ACEngineering

Member

Location

Oxon

• Jul 8, 2023

• #4

Pilot Accumulator failed.

 

L

Lazy Eric

Member

• Jul 8, 2023

• #5

Make sure aux switch is clicked to front when wiggling ya knobs.

 

Farmer_Joe

Member

Livestock Farmer

Location

The North

• Jul 8, 2023

• #6

here could just be o ring on valve

Fitting hydraulic dump valve to jcb 526 56

need to get this done but trying to figure out the best way of doing it as putting attachments on is a real pain. Anybody ever done it. I like how claas have theirs by the headstock so would like something similar although a manual lever/ tap would be easier rather than an electric valve

thefarmingforum.co.uk

 

R

Rod Dumbreck

Member

Location

Edenbridge, Kent (actually just in Surrey)

• Jul 8, 2023

• #7

If you open the grab and then nearly close it, take off the one coupling, and then close the rest of the way (under gravity at this stage) and disconnect you will land up with no pressure in the grab, it won't help if you need to connect straight away to something else.

Otherwise as above run the engine, switch off then on but don't start, rock the buttons and the pressure goes. If you have a nearly knackered pilot pressure accumulator you have to be quick from when the engine last ran. As per Ace above

 

Last edited: Jul 8, 2023

T

Tractor Tim

Member

Arable Farmer

Location

Sticky out bit by liverpool

• Jul 8, 2023

• #8

Accumulator went on ours if you pressured it one way turned the engine off then ignition back on and roll the thumb wheel it used to be enough pressure there to force it to dump. Got us through till we had chance to sort it properly

 

whiddy

Member

Location

Oxford

• Jul 8, 2023

• #9

Try greasing up the locking pins, then put them mid way [ie no pressure either way]
then stop engine. connect pipes, if that fails crack joint on pipe!!

 

Poorbuthappy

Member

Livestock Farmer

Location

Devon

• Jul 9, 2023

• #10

Thanks for all replies.
I'm managing to get pipes on and off currently, but oil floods out in the process, which I guess backs up the accumulator diagnosis?