Massey Ferguson 3065 4wd problem

[vasyj04]

Hi everyone!
I have a problem with my MF 3065.The 4wd light is on all the time , when i push the button to disengage it dosn't work, i tried to hold the button but it dosn't work either, i've swapped the solenoid round and still dosn't work, i have buyed this tractor one year ago and i changed the whole front diff. If you have any advice that would help very much!

 

[daveydiesel1]

Is there not a thing on the 3000 series that u have to brake to get her out of 4wd for the first time after starting. Least it was like that on our 3080. Is ur brake lights working?

 

[vasyj04]

Is there not a thing on the 3000 series that u have to brake to get her out of 4wd for the first time after starting. Least it was like that on our 3080. Is ur brake lights working?

Yes, my brake lights are working, so how can i disengage 4wd?

 

[daveydiesel1]

Have u power comin to the solinoid when trying to disengage

 

[daveydiesel1]

@dee is the resident massey expert

 

[vasyj04]

@dee is the resident massey expert

I heard that 4wd should disengage automaticaly when you get over 14kph, and should engage when you brake, all the solenoids are working properly

 

[daveydiesel1]

I heard that 4wd should disengage automaticaly when you get over 14kph, and should engage when you brake, all the solenoids are working properly

Yes it should on a 3000 series

 

[vasyj04]

Yes it should on a 3000 series

Yes it should on a 3000 series

It could be the brake switch

 

[GHuggins]

Unless the 3000 series is different from the 6100 series in it's wiring the solenoid has to be energized to engage 4wd. As long as the 4wd is disengaging when it gets above 8ish mph - 13ish kph, I would investigate the switch itself and corresponding inputs to the module. Really lean towards the switch as it's a moving contact component.

Theoretically if it's disengaging with speed then all of the outputs down to the solenoid and hydraulic valving should be in working order and only the inputs and their corresponding components would be in question... Granted the operation is like the 6100 of newer tractors that I'm more familiar with

 

[MF-ANDY]

I heard that 4wd should disengage automaticaly when you get over 14kph, and should engage when you brake, all the solenoids are working properly

Only if you press the brakes and then the 4wd switch when you first start up

 

[vasyj04]

Unless the 3000 series is different from the 6100 series in it's wiring the solenoid has to be energized to engage 4wd. As long as the 4wd is disengaging when it gets above 8ish mph - 13ish kph, I would investigate the switch itself and corresponding inputs to the module. Really lean towards the switch as it's a moving contact component.

Theoretically if it's disengaging with speed then all of the outputs down to the solenoid and hydraulic valving should be in working order and only the inputs and their corresponding components would be in question... Granted the operation is like the 6100 of newer tractors that I'm more familiar with

So, i've called someone from Massey to check the computer under the left side of the cab, they said that is functional, also they checked all the silenoid which also are ok.

 

[manhill]

Unless the 3000 series is different from the 6100 series in it's wiring the solenoid has to be energized to engage 4wd. As long as the 4wd is disengaging when it gets above 8ish mph - 13ish kph, I would investigate the switch itself and corresponding inputs to the module. Really lean towards the switch as it's a moving contact component.

Theoretically if it's disengaging with speed then all of the outputs down to the solenoid and hydraulic valving should be in working order and only the inputs and their corresponding components would be in question... Granted the operation is like the 6100 of newer tractors that I'm more familiar with

3000 series 4wd is mechanically held on by a spring clutch until released by hydraulic pressure. So engine needs to be running and 17 Bar pressure applied by putting 12v on 4wd solenoid.

 

[vasyj04]

3000 series 4wd is mechanically held on by a spring clutch until released by hydraulic pressure. So engine needs to be running and 17 Bar pressure applied by putting 12v on 4wd solenoid.

Soo, i think that i don't have enough pressure because my diff lock doesn't disengage when the tractor has been running for some time

 

[manhill]

Soo, i think that i don't have enough pressure because my diff lock doesn't disengage when the tractor has been running for some time

diff lock is normally disengaged until hydraulic pressure is applied to the diff lock cylinder in the front axle. This engages the dog clutch.So, no pressure = no diff lock.

 

[manhill]

You could override the brain by pulling the connector off the diff lock solenoid and wiring 12 v to the 4wd solenoid via an on/off switch but you would lose automatic 4wd braking.
Do you need diff lock it 4wd can be applied via a switch?

 

[vasyj04]

You could override the brain by pulling the connector off the diff lock solenoid and wiring 12 v to the 4wd solenoid via an on/off switch but you would lose automatic 4wd braking.
Do you need diff lock it 4wd can be applied via a switch?

I had so use sometimes the diff lock becouse i broke my fwd pinion and i needed to change the whole front differential, sorry for my bad english

 

[manhill]

Then you effectively have a 2wd tractor with no diff lock, the worst possible situation as there is no diff lock facility on the rear axle. Getting the 4wd working is the priority, the diff lock problem comes second. You think your English is bad? You should see the poor English on the BBC and our newspapers!

 

[dee]

@vasyj04
Did you check that no fuses are blown
Have you looked at the brake light switches to make sure both are sending a signal
Is there any red lights on the dash when the 4wd is illuminated.

 

[vasyj04]

Then you effectively have a 2wd tractor with no diff lock, the worst possible situation as there is no diff lock facility on the rear axle. Getting the 4wd working is the priority, the diff lock problem comes second. You think your English is bad? You should see the poor English on the BBC and our newspapers!

So the problem might be an electrical one

 

[vasyj04]

@vasyj04
Did you check that no fuses are blown
Have you looked at the brake light switches to make sure both are sending a signal
Is there any red lights on the dash when the 4wd is illuminated.

No fuses are blown, i will check the brake switch and no red lights on the dash board.