Have a problem with the brakes on the tm atm. Brake fluid been disappearing from the system for a while now. We've always kept topping it without getting to the root cause. I tried looking at the brake lines running around the outside of the tractor and found nothing. Fluid only seems to disappear when you have the tractor on for a while and there is no puddles oil around to suggest it's an external problem. Dad reckons either it's the seals or worst case scenario a hairline crack inside the housing. Ever since he told me I've been badgering him to get it fixed because one of these day, they will go on us and be in ditch for our troubles but he doesn't want to touch it as it requires opening up the backend which will take time and of course money to do as we have no idea about what goes where and such with splitting a tractor thus a mechanic would be needed for such a venture. Could there be other reasons to why it would be disappearing apart from us having to split the tractor to find the problem? Just don't want to jump to the conclusion that it's an internal problem is all.