Jd 6810 pto issue

[peatstack]

Hi
Pto not engaging on my 6810 or when it does it stops periodically. Replaced switch and solenoid valve but no difference. Fault code 72 shows up which is electrical circuit. I'm told bcu is next to look at. Can this be sent to a dealer for testing/repair? Any advice welcome thanks

 

[Jimmy T]

Check the wiring between the switch and solenoid. Make sure it hasn't rubbed through where it runs under a hydraulic pipe, or something....

 

[peatstack]

Thanks, I followed it from solenoid to where it joins into the loom with wires from speed sensor but I'll try following it to the switch. It's like poking around in spaghetti amongst all that pipes n things!!!

 

[Tractortech]

Now Then...
Take a look at address BCU009.
It should show 001 with the PTO off and 010 with it on..... Watch closely, it may display 011 as it turns itself off..

 

[peatstack]

I'll look at it when I get home. What would 011 mean if it flags up?
Thanks

 

[Tractortech]

I'll look at it when I get home. What would 011 mean if it flags up?
Thanks

BCU issues.....
🛠

 

[peatstack]

I see, thanks I will keep you posted

 

[peatstack]

Just had a look there and when I turn the pto on it goes from 001 to 011 for a couple of seconds then 010.and back to 001 when I switch off pto. So you're sure my problem is the bcu then???

 

[Tractortech]

I'd say it's the switch. It should change instantly from 001 to 010.
There's a microswitch inside the actual PTO switch. 12v is supplied to it. So, 12v should be coming out as either PTO off when down, then PTO on when lifted and turned.
If the BCU sees both on and off signals, it won't turn it on..

 

[peatstack]

I replaced the switch though......

 

[Tractortech]

I replaced the switch though......

With a genuine JD part??
If you have 011 , the controller is seeing on and off at the same time. I haven't got a tractor to hand to see how fast it changes..