JCB HYDRADIG 110W Loss of communication from upper ECU to lower Ecu and engine ecu

[sepulchral]

Hi, i bought a used hydradig from an auction and it moved about 10 feet off my loading dock, then all readouts on the dash went from numerical to "???".

plugged in jcb service master and i am not getting communications from the lower ecu or engine ecu.

looked (visibily) at what i could see with on the electrical swivel and i dont see anything wrong.

I will pay for any over the phone tech support. any JCB gurus? i really need some assistance please guys. thanks

Mike

 

[V8Druid]

Hi, i bought a used hydradig from an auction and it moved about 10 feet off my loading dock, then all readouts on the dash went from numerical to "???".

plugged in jcb service master and i am not getting communications from the lower ecu or engine ecu.

looked (visibily) at what i could see with on the electrical swivel and i dont see anything wrong.

I will pay for any over the phone tech support. any JCB gurus? i really need some assistance please guys. thanks

Mike

have you slewed the upper structure at all, from the position it was in when you bought it ?
invest in some contact cleaner aerosols (Inhibisol electrical contact cleaner if you can find it - had carbon tetrachloride in it ) and give the commutator assembly a good dowsing, whilst rotating the upper

 

[V8Druid]

have you slewed the upper structure at all, from the position it was in when you bought it ?
invest in some contact cleaner aerosols (Inhibisol electrical contact cleaner if you can find it - had carbon tetrachloride in it ) and give the commutator assembly a good dowsing, whilst rotating the upper

it's almost certainly be a 'canbus' set up so will only be maybe 5V-ish ... slightest dirt on the comm. or wipers is going to give you BIG problems, as it'll almost certainly be very low current transfer too
that commutator set up/assembly will need to be surgically clean, for the communication rings, aside from any main voltage rings, which'd stand some level of contamination

 

[sepulchral]

i cannot start the machine to slew anything. im kind of stuck in a bad way

 

[Lancs Lad]

@jd6820 one for you

 

[CPS]

Where are you based at for a start?

 

[DaveDCB]

Where are you based at for a start?

USA it would appear?

I’d go with what @V8Druid said for a starting point.

Plenty of tech drawings on jcb parts website.. they help alot

 

[sepulchral]

USA, Virginia. There is no feasible way to remove the cover over the slipring electrical swivel. it hits the frame. How have others done this? surely i dont need to remove the entire swivel manifold?

THis hydradig is an effing disaster.

 

[V8Druid]

USA, Virginia. There is no feasible way to remove the cover over the slipring electrical swivel. it hits the frame. How have others done this? surely i dont need to remove the entire swivel manifold?

THis hydradig is an effing disaster.

some pix would help 'praps?

it's almost certainly be a 'canbus' set up so will only be maybe 5V-ish ... slightest dirt on the comm. or wipers is going to give you BIG problems, as it'll almost certainly be very low current transfer too
that commutator set up/assembly will need to be surgically clean, for the communication rings, aside from any main voltage rings, which'd stand some level of contamination

or worse still - corrosion

 

[sepulchral]

it's almost certainly be a 'canbus' set up so will only be maybe 5V-ish ... slightest dirt on the comm. or wipers is going to give you BIG problems, as it'll almost certainly be very low current transfer too
that commutator set up/assembly will need to be surgically clean, for the communication rings, aside from any main voltage rings, which'd stand some level of contamination

what is the best way to get to the "slip ring" of the machine? pull the body apart? drop the gearbox and pull it down? this machine is driving me nuts

 

[V8Druid]

what is the best way to get to the "slip ring" of the machine? pull the body apart? drop the gearbox and pull it down? this machine is driving me nuts

some pix would help 'praps?

the electrical slip rings usually live on top of the hydraulic rotary coupling, so pulling it down is a non starter - that usually comes out from the top up and as a rule is fixed to the superstructure

 

[DaveDCB]

Not something daft like a bad earth? Loose battery cable?

 

[DaveDCB]

Not something daft like a bad earth? Loose battery cable?

 

[sepulchral]

the electrical slip rings usually live on top of the hydraulic rotary coupling, so pulling it down is a non starter - that usually comes out from the top up and as a rule is fixed to the superstructure

hits the frame of the digger if you try to lift it up. terrible terrible design

 

[V8Druid]

hits the frame of the digger if you try to lift it up. terrible terrible design

some pix would help

 

[jd6820]

Hi, i bought a used hydradig from an auction and it moved about 10 feet off my loading dock, then all readouts on the dash went from numerical to "???".

plugged in jcb service master and i am not getting communications from the lower ecu or engine ecu.

looked (visibily) at what i could see with on the electrical swivel and i dont see anything wrong.

I will pay for any over the phone tech support. any JCB gurus? i really need some assistance please guys. thanks

Mike

Let's start with the simple stuff first. Have you checked battery connections and the isolator switch? Then it is a case of checking power and grounds to the ECU's, have you any wiring schematics. If you get me a serial number via PM if you want and I'll get the relevant diagrams so you can trace the wiring. How are your skills with a multimeter?

 

[jd6820]

@jd6820 one for you

Will try my best to help, never as easy as being their in person, but the USA is a little far to venture for a wiring fault.

 

[V8Druid]

USA, Virginia. There is no feasible way to remove the cover over the slipring electrical swivel. it hits the frame. How have others done this? surely i dont need to remove the entire swivel manifold?

THis hydradig is an effing disaster.

Hi, i bought a used hydradig from an auction and it moved about 10 feet off my loading dock, then all readouts on the dash went from numerical to "???".

plugged in jcb service master and i am not getting communications from the lower ecu or engine ecu.

looked (visibily) at what i could see with on the electrical swivel and i dont see anything wrong.

I will pay for any over the phone tech support. any JCB gurus? i really need some assistance please guys. thanks

Mike

so how did you look at the slip rings if you can't get the cover off?

hits the frame of the digger if you try to lift it up. terrible terrible design

as said previously ... some pix would be a great help in understanding the issues

 

[sepulchral]

so how did you look at the slip rings if you can't get the cover off?

as said previously ... some pix would be a great help in understanding the issues

when i lifted the slip ring cover it hit the frame, i could see that it was very clean on the inside (base) of the slip ring. could only see about 1" of the area.

Let's start with the simple stuff first. Have you checked battery connections and the isolator switch? Then it is a case of checking power and grounds to the ECU's, have you any wiring schematics. If you get me a serial number via PM if you want and I'll get the relevant diagrams so you can trace the wiring. How are your skills with a multimeter?

CBW11CVFVH2496067

i am very good with a multimeter. I assumed there was a CAN issue at the slip rings. i would love to know where and which ecus to test. I did not find any blown fuses in the three fuse box locations that i have looked (one on the wheel body step tread, one in the cab, one in the engine bay)

I have checked leads at the starter, isolator, and batteries. even bypassed the isolator with a 12v jump box on the far end

I spoke to a technician "CHAD" at stephenson JCB in the east coast of America and he suggested i jumper across the plugs on the wires to prove or disprove the bad slip ring / can issues. I do have JCB servicemaster and from the cab fuse panel service port using USBLINK 2.0 I was able to see signals from all ecus except for the Engine ECU and the Lower ECU.

 

[jd6820]

when i lifted the slip ring cover it hit the frame, i could see that it was very clean on the inside (base) of the slip ring. could only see about 1" of the area.



CBW11CVFVH2496067

i am very good with a multimeter. I assumed there was a CAN issue at the slip rings. i would love to know where and which ecus to test. I did not find any blown fuses in the three fuse box locations that i have looked (one on the wheel body step tread, one in the cab, one in the engine bay)

I have checked leads at the starter, isolator, and batteries. even bypassed the isolator with a 12v jump box on the far end

I spoke to a technician "CHAD" at stephenson JCB in the east coast of America and he suggested i jumper across the plugs on the wires to prove or disprove the bad slip ring / can issues. I do have JCB servicemaster and from the cab fuse panel service port using USBLINK 2.0 I was able to see signals from all ecus except for the Engine ECU and the Lower ECU.

You are on the right lines with a CAN issue at the slip-rings. I'd say Chad has the right idea about bypassing the slip ring for test purposes.