advise please,jd 6230 banging when brakes released

[scottrac]

Hi
new to here and not really a farmer (car and van mechanic with a mot station and a small holding)
I bought a jd6230 standard 2009 with a loader a few months ago for doing our hayledge,no experience with tractors and only used to driving my international 685xl.
when clearing the fields and stacking found that when you release the brakes the front end seems to bang and shake?
if anyone could advise me i would be really gratefull.
Am handy with the tools but would this be a dealer job?
thanks in advance

 

[milkloss]

It's when the 4wd comes out of gear after braking. Obviously it's winding up for some reason so check your tyre sizes and see if wear is similar front/back. Some will say to change the axle oil, maybe it will help, maybe not. I gather the slip additive may reduce it.

best bet might be to put a switch in it somewhere to prevent the 4wd coming on when you brake.

 

[Hereward]

When you press the brakes, it engages 4wd, when you release brakes it disengages, this is the clunk you hear.

 

[Hereward]

It's when the 4wd comes out of gear after braking. Obviously it's winding up for some reason so check your tyre sizes and see if wear is similar front/back. Some will say to change the axle oil, maybe it will help, maybe not. I gather the slip additive may reduce it.

best bet might be to put a switch in it somewhere to prevent the 4wd coming on when you brake.

My second thought as above is the tyre ratios are incorrect front to rear, or the fronts are very worn from loader work.

 

[scottrac]

thanks, I did change axle oils and serviced it when i bought it as a precaution,it is a ex council one with massive grass tyres so maybe thats the cause?
Is it ok to leave then do you think?
Thanks again

 

[Mouser]

JD would be quite bad for it generally but with non standard tyres I would be checking ratios.

 

[Hereward]

thanks, I did change axle oils and serviced it when i bought it as a precaution,it is a ex council one with massive grass tyres so maybe thats the cause?
Is it ok to leave then do you think?
Thanks again

Can you tell us what size tyres are fitted front and rear and estimate the wear % on each.

 

[Flat 10]

Can you tell us what size tyres are fitted front and rear and estimate the wear % on each.

You can't tell him what they should be without knowing what front axle or diff is fitted. His instruction manual will tell him how to find out and work it out, but JD like to make it complicated

 

[scottrac]

Thanks,will have a look when I get home tonight and let you know,don’t think I got a book with it though

 

[GeorgeK]

It's a lot worse if you are turning when you release the brakes, it's second nature now but around the yard on hard standing if possible I straighten the wheels up before releasing the brakes, then it doesn't bang when disengaging 4wd.
You can check if the wheel ratios are wrong by driving straight for a distance and seeing if it still winds up and bangs out of 4wd

 

[Sharpy]

Other thing to playwith is tyre pressures, soft on one axle and hard on the other will make this a lot worse.

 

[scottrac]

Thankyou, I’ll try that aswell,don’t mind if it’s normal just didn’t want to make anything worse by leaving it.went to buy it with a good mate who knew them inside out but unfortunately he had a catastrophic accident in his quadtrack and got driven over and obviously not here anymore,thanks again for the help,my mate used to get the calls from me so chuffed to bits you are all so helpful

 

[Bloders]

best bet might be to put a switch in it somewhere to prevent the 4wd coming on when you brake.

Until you have an accident on the road and then, you could be in big trouble.

 

[Gerbert]

Did you use oil suitable for a limited slip dif in the frontaxle?
I take it you don't have front axle suspension?

 

[Robt]

Thankyou, I’ll try that aswell,don’t mind if it’s normal just didn’t want to make anything worse by leaving it.went to buy it with a good mate who knew them inside out but unfortunately he had a catastrophic accident in his quadtrack and got driven over and obviously not here anymore,thanks again for the help,my mate used to get the calls from me so chuffed to bits you are all so helpful

Crikey, sorry to hear that !

 

[scottrac]

Did you use oil suitable for a limited slip dif in the frontaxle?
I take it you don't have front axle suspension?

Hi
yes all oils from jd dealer (nearly died from shock of price compared to a car/van service kit,and no suspension.
thanks

 

[Dave W]

thanks, I did change axle oils and serviced it when i bought it as a precaution,it is a ex council one with massive grass tyres so maybe thats the cause?
Is it ok to leave then do you think?
Thanks again

It's perfectly normal but will be exaggerated with the turf tyres. They have more surface area in contact with the road so the tyres can't slip as easily.
when the 4wd is engaged with the brakes, the front wheels will be geared to turn slightly faster than rears (otherwise known as lead).

Don't be tempted to to put a switch in to disable it. Health and safety would have a field day if you have an accident an find you've modified braking system

 

[scottrac]

Crikey, sorry to hear that !

Thanks
yes not nice went under drill aswell
32 years old with young family and new baby
what a waste

 

[scottrac]

It's perfectly normal but will be exaggerated with the turf tyres. They have more surface area in contact with the road so the tyres can't slip as easily.
when the 4wd is engaged with the brakes, the front wheels will be geared to turn slightly faster than rears (otherwise known as lead).

Don't be tempted to to put a switch in to disable it. Health and safety would have a field day if you have an accident an find you've modified braking system

Thanks alot
you have put my mind at rest
any one need any advice on mot's or cars and vans I am more than willing to help if I can
thanks again

 

[milkloss]

Until you have an accident on the road and then, you could be in big trouble.

yeah, there's that, risk would be minimised if it's one driver/owner. Makes me laugh really because if the 4wd bulb blows you don't get 4wd which is mega dangerous in a damp sloped field With a trailed forager and loaded trailer turning on the headland. Been there. I presume this would mean you also wouldn't get 4w braking on the road...... a blown light on the side console is easy to miss.