JCB 8015 arm not lifting

[V8Druid]

Ok, i think I may have found solenoid on the back left under the exhaust. We’ve removed the exhaust to get better access. There are wires going into the box with the hydraulic pipes, unfortunately I still can’t get good access to them, but could anyone confirm this that we are on the right track?View attachment 67313

that looks to be the badger .. three lines from the pumps, two test ports and a PRV, plus what looks like two lines to the servo sticks and a line back

 

[Moog]

the book of words ain't very helpful on locations for this but ..
the solenoid is on the servo pressure control block ..
which looks summat like this ...
has two test points for servo and main pressure checking and
a lot of hoses, to/from it
View attachment 67262
the schematic is as follows - there'll be a hose from P1, P2 and P3 feeding to it - it not only controls the servo feed, but controls the servo pressure via the relief valve --
it'll also have an accumulator attached to it (2f) -
2a is the solenoid
2e is the servo pressure test point and
2d is the main pressure test point -
2b appears to be the relief/regulating valve ...
there'll be a P and T (return) line from it, to each servo stick base (3 & 4)

think you're going to need to take a few more cover plates off to trace this lot ....
as said - book of words gives little help as to location ..

best chance is trace the P1, P2 & P3 lines to it or
the servo lines fed by it
View attachment 67264 View attachment 67265

View attachment 67263

sorry I can't be more help with an idea of location

That’s great mate, it look likes it matches the block we have found, just need to get to the blinking solenoid now!

 

[T whiting]

Can you not pull the plug off and check it for voltage? Did you unplug that plug? It looks to clean to have been disconnected long

 

[V8Druid]

Can you not pull the plug off and check it for voltage? Did you unplug that plug? It looks to clean to have been disconnected long

see what you mean Thomas
did the plug circled green come out of the receptacle / socket circled red @Moog or is there another socket floating about in there somewhere
guessing that plug in the green circle is going to the solenoid ... could try giving that 12V (and an earth) and see if you have life at the servos?

looks like the pump lines have been off there at some time ... marked up with coloured cable ties (red/yellow)

 

[Moog]

Just a quick update. I haven’t got to the wires on solenoid yet as I just can’t get my hand in there, unless I detach all the hoses, which will be a dog of a job.I have moved the top hose lower down now (as it was being melted by the exhaust). We did put the exhaust back on, fired her up and tested to see if 12v was coming through the dead man’s handle and to the connector under the digger, which it was, so no issue with power there. I have a forklift fitter friend who is hopefully going to bob by over next week to have a look. Will keep you posted, cheers

 

[Moog]

see what you mean Thomas
did the plug circled green come out of the receptacle / socket circled red @Moog or is there another socket floating about in there somewhere
guessing that plug in the green circle is going to the solenoid ... could try giving that 12V (and an earth) and see if you have life at the servos?

View attachment 67325
looks like the pump lines have been off there at some time ... marked up with coloured cable ties (red/yellow)

Yep, the green plug came out of the red socket, I’ve not tested them for 12v, but can do. I don’t know what the red socket is feeding. I’ve been trying to get to wires on the base of the yellow box where I think the solenoid is.

 

[V8Druid]

Yep, the green plug came out of the red socket, I’ve not tested them for 12v, but can do. I don’t know what the red socket is feeding. I’ve been trying to get to wires on the base of the yellow box where I think the solenoid is.

so the green plug isn't feeding the solenoid then?

 

[V8Druid]

Just a quick update. I haven’t got to the wires on solenoid yet as I just can’t get my hand in there, unless I detach all the hoses, which will be a dog of a job.I have moved the top hose lower down now (as it was being melted by the exhaust). We did put the exhaust back on, fired her up and tested to see if 12v was coming through the dead man’s handle and to the connector under the digger, which it was, so no issue with power there. I have a forklift fitter friend who is hopefully going to bob by over next week to have a look. Will keep you posted, cheers

will that valve block not dismount from the chassis to raise it enough to get at the solenoid coil ? -- can't be much holding it in position and the hoses should give some flex

 

[Moog]

I have just realised that the red socket is the fuel sensor - doh! I just have worked that out sooner with the fuel supply next to it! so I can discount the red and green connectors now. Just need to concentrate on the yellow box and test those wires if I can get to them somehow.

 

[Moog]

will that valve block not dismount from the chassis to raise it enough to get at the solenoid coil ? -- can't be much holding it in position and the hoses should give some flex

Soz for cross over of messages, they don’t seem to upload until I put a message on. yep, green is not linked to solenoid.
i have detached the valve block from the chassis as you say, but just can’t get it to move back enough to access the wires. I won’t be beaten so will have another go - cheers for your continued support.

 

[Moog]

Ok guys, made some progress at last. Got the connector off the valve block and have 12V coming in the supply - see pic. So next job is to try and get this solenoid off the bottom of valve block. I’m not sure what to expect when I take solenoid out, will hydraulic oil come out as well? Can I test the solenoid when it’s out to see if it works?

 

[V8Druid]

just pulled this up on line of the servo pressure control valve .... solenoid looks to be a conventional 'bolt on' to the shuttle body/tube - so should be able to remove it on its own .. undo the nut retaining it, get it off and energise it with 12v and put a steel pin/bolt/whatever in the hole and see if the magnet grabs it

 

[V8Druid]

just pulled this up on line of the servo pressure control valve .... solenoid looks to be a conventional 'bolt on' to the shuttle body/tube - so should be able to remove it on its own .. undo the nut retaining it, get it off and energise it with 12v and put a steel pin/bolt/whatever in the hole and see if the magnet grabs it
View attachment 67440

be careful slacking the nut ... might need a slender/thin open ended spanner for the nut between the solenoid body and the valve body to ensure you don't release that one, holding the cartridge in the valve body -- but it should be a lot tighter than the nut holding the solenoid in place -- emphasis on should be ---- have had one do it to me - it seats on an 'O' ring - if the solenoid nut is rusted / tight as **** on the threads / loctited

 

[Steve]

Ok guys, made some progress at last. Got the connector off the valve block and have 12V coming in the supply - see pic. So next job is to try and get this solenoid off the bottom of valve block. I’m not sure what to expect when I take solenoid out, will hydraulic oil come out as well? Can I test the solenoid when it’s out to see if it works?
View attachment 67435

Try testing for voltage when the plug is on the coil for the solenoid to be certain that you still have a good voltage while the coil/solenoid is drawing current. Just thinking this should be ruled out before the need to remove anything.

 

[V8Druid]

Try testing for voltage when the plug is on the coil for the solenoid to be certain that you still have a good voltage while the coil/solenoid is drawing current. Just thinking this should be ruled out before the need to remove anything.

well if it isn't the coil's gonna have to come off anyway

 

[Steve]

If there isn’t 12volts when the coil is under load , there must be a supply problem so it wouldn’t need removing was what I meant.

 

[V8Druid]

If there isn’t 12volts when the coil is under load , there must be a supply problem so it wouldn’t need removing was what I meant.

or a poor earth'd give the same issue

 

[Moog]

We would have followed what you said Steve but not sure where we would be testing voltage when the plug was connected. So we took the plunge and have managed to disconnect coil - it actually turned out to be a round hand nut which loosened with ease.
Energised the coil from battery and it became magnetic - we were hoping that would be our problem, so the saga continues! What is next guys

 

[V8Druid]

We would have followed what you said Steve but not sure where we would be testing voltage when the plug was connected. So we took the plunge and have managed to disconnect coil - it actually turned out to be a round hand nut which loosened with ease.
Energised the coil from battery and it became magnetic - we were hoping that would be our problem, so the saga continues! What is next guysView attachment 67458View attachment 67459

clean the coil off and see if there are any cracks in the casing and whether it has swollen at all.
how 'good' is the magnetic pull?
I have had coils where they're only providing a 'weak' pull, insufficient to operate the shuttle ... had one on the slew brake on the 'Drema - had me going for a while, 'til i swapped a known operating one and the brake came off - new one acquired and job sorted
offending article ... couldn't see the crack 'til I got it off .. was pulling - but not enough

 

[Monkeybusiness]

Check its energising correctly when plugged in and the armrests are up/down during ‘normal’ operation, not just with a known 12v supply. My guess is the issue isn’t the solenoid, it’s the wiring/switches feeding it.