6410 not engaging in forward gear

tvocque · Aug 1, 2020

checked pressure at these ports and both forward and reverse measure right at 100 psi

after about 50 minutes of use fwd drops to 50 and will intermittently pull
reverse stays at 100 psi

what technical manual do I need?

tvocque · Aug 1, 2020

thank you for all your help

jd110 · Aug 2, 2020

tvocque said:
thank you for all your help

The diagnostic manual is TM4572 and the repair manual is TM4574. Do you have mfwd? If so, check clutch pressures with mfwd turned on and off to see if there is any difference. Also try with pto turned on and off.

Zebrafive · Aug 3, 2020

jd110 said:
The diagnostic manual is TM4572 and the repair manual is TM4574. Do you have mfwd? If so, check clutch pressures with mfwd turned on and off to see if there is any difference. Also try with pto turned on and off.

Just an FYI the manuals TM4572 & TM4574 are for JD 6410 (thread title) NOT JD 6415

tvocque · Aug 9, 2020

i got the power quad successfully out of tractor to disassemble to the forward drum and the piston can i disassemble from the back of transmission or do i have to disassemble from the front?

i have 6415 power quad with left hand manual reverser with 640 loader

thanks floyd

tvocque · Aug 10, 2020

regarding john deere 6415

I have the fwd clutch drum out and will take it apart today I will replace all the piston and seals as I put it back together
I have not yet take apart the front of the transmission should I do that to check things? I have no linings failing that I can see
is there anything out towards the valve body I should check that can be leaking the oil? and oil tubes, plastic parts or seals that route the oil to the fwd clutch drum

thanks for all your help

john deere 6415 with 640 SL

tvocque · Aug 10, 2020

regarding the 6415 john deere
I did not see any change when the pto and or the mfwd was activated I see the pressure blip briefly showing oil change and activation but it comes back immediately

the oil pressure falls off in the forward direction only and will go to 50 or below and stop pulling

I have the fwd clutch drum out and will take it apart today I will replace all the piston and seals as I put it back together
I have not yet take apart the front of the transmission should I do that to check things? I have no linings failing that I can see
is there anything out towards the valve body I should check that can be leaking the oil? and oil tubes, plastic parts or seals that route the oil to the fwd clutch drum

thanks for all your help
I apologize if you get multiple emails I have not learned how to navigate the reply in the tractor by net format

john deere 6415 with 640 SL