Thread: Class ares 567 atz transmission problem

Originally Posted by feratox

From experience here (with a different flavour of tractor, not all in same tractor); the 3rd one seems most likely

1. had a front diff partially go in one, would go in 4wd but would "slip" when doing certain things (shit your pants material pulling a feed wagon around in the wet)
2. as has been said before, dual switch for 'auto" 4wd, may apply for reverse but usually at a certain speed. Not sure about Claas but Fergusson have either a rocker type momentary switch to hold down or, in the more modern ones, two different buttons on the B pillar for auto or constant 4wd
3. back end oil, when you go nose down, oil runs to the front and can't be picked up by the pump. In quite a few of those tractors, oil flow is needed to keep the tractor in 4wd rather than just the change. This has caught me out a few times driving down a slope to retrieve something and then not being able to reverse out. It is probably worse if using oil flow for something else. I have found it helps to keep the back end over filled (on the dipstick) to avoid this.

As a side note for those saying get a JD, I think a lot of Claas tractors used JD engines

Yeah running transmission oil a bit over full to counteract the slope. Not sure about the motor but the transmission is agco/Renault same transmission/backend as a lot of different tractors so you would think if our problem was a design fault other people would be having the same problem

If you back it up a hill and the back wheels start to spin will it engage the front ones by pushing gently on the brakes? Most modern tractors designed to engage 4wd under braking to allow engine braking to front and rear

Edit to add: I just Google the possibility of that happening on a Claas and it seems it is a relatively known issue, 4wd switch piggybacks into braking circuit and even a blown tail light or loose connection in the lighting circuit can throw the whole system off. Seems dumb, aparently Case CVX are the same. Be worth a look at.

Originally Posted by Ryan_Songhurst

If you back it up a hill and the back wheels start to spin will it engage the front ones by pushing gently on the brakes? Most modern tractors designed to engage 4wd under braking to allow engine braking to front and rear

Hmmmm only thing is when you touch the brakes diff lock disengages….but maybe designed for 1 back wheel to slip while driving both front wheels

A bit of a development, tractor has been pulled down and she is showing signs of wear in the reversing clutch thingy for want of a better word, so the boss is going to get rid of her, I’ve been put into a darker shade of green, a deutz. But my main concern now is we brought a claas 410 last year and are we going to have the same problem,although our country isn’t quite as steep as where I work. Still got 2 1/2 years warranty so we’ll have to keep an eye on it and wait and see. Thanks for your responses, Steve