G'day from Australia!
Looks like you've scored a nice well-kept tractor - just a couple small issues to sort out, not bad for a machine of its age. I especially like how you have quad work-lights built into the fenders - that's given me a great idea! :laughing:
The only help I can give you on the power steering is that there may be a filter, or a screen in the oil reservoir, which becomes blocked after the tractor is used for some time, stopping oil supply to the pump - might be worth investigating. ATF is indeed the correct oil for it.
Regarding brakes - I think yours has the same brakes as my MF40 - dry disc inboard brakes; also has hub reduction drive boxes. The correct way to adjust these brakes is to wind up the self-locking nut on the front of each axle housing until you get a good pedal, but not to the point of the brake dragging. Remember, you will need to slacken off the pull-rods to allow the internal mechanism to return to its rest position. They are mechanically-applied self-energising twin-disc brakes - very good when they're working, but they must be dry and rely on three seals to not be leaking oil into their chamber. I had to dismantle one side of my 40 and renew brake discs and the three seals - until then I had a good pedal height but no friction! :laughing: The hubs have their own oil - check them and refill if required - don't run them dry.
Diff lock - Our 135's pedal seized years ago - we tied it up after getting it stuck in the engaged position. I gently use the steering brakes as I used to on our 35 - a diff-lock can steer you when there's a notable difference in rear wheel grip - be careful.
If you lift heavy bucketfuls - use a counterweight - while your tractor is even heavier than mine, you'll notice the difference in grip; but you might not notice the difference in stability ... until it's too late. I use a heavy slasher (bush hog) which makes it hook up and push, also adds weight to the rear wheels, helping to keep the machine upright and stable. Don't want you hurt, that's the idea. :thumbsup:
I'm wondering though, the front wheels and tyres would be 6.00-16, the correct size, so I must just be too used to our MF40 loader - has 7.50-16s.
Keep us updated on your progress - hoping for a win for you! :drink: