Ford 8600 brakes

Im doing the brakes on my 8600 new piston seals and discs. Previously before taking apart i had to refill with brake oil once a month and only the right brake worked. Left would pump up but not do anything. I pulled right side apart nothing out of the ordinary even the disc wasnt wore much put that side back together and moved on the the left side. Pulled it apart and the piston has been stuck fully out for who knows how long and has wore the outer friction plate about a half inch and the brake disc is wore to the steel. What would cause it to do that so if theres something else im supposed to be looking for. Also on the left side there are 3 springs behind the piston. On the right side there wasnt any. Im guessing someone else must not have put them back in. So will it be fine without springs on the other side.

Brake fluid tends to attract moisture and it tends to end up in the wheel cylinders and cause them to rust. After a little rust develops the piston will get hung up normally in engaged position.

All springs should be installed. Parts break down shows 6 required 3 per side. If missing 3 needed then, if
you purchase all 6 you have new ones on each side. Think that would be a smart move. A special brake mineral
oil is required in your brake system. This can be purchased from a New Holland dealer. Regular brake fluid
will ruin the new piston seals. Clean everything up good before installing new parts. The filing's from your
old brake disc are still in the hydraulic oil and system of your tractor. The large filter on the side of
the rear housing is there to catch that but, with that much wear i doubt that it got it all. Flush the
housing while you have it apart and install new hydraulic oil and a new filter. I would then change the
filter again after the tractor is used a few hours. Not all of the old 8000 Fords just before the 8600 had
this filter system installed from the factory. They had major problems from brake wear contaminating the
hydraulic systems. A kit to install a filter was developed by Ford and tractors were recalled to install the
kit. Upgraded brake discs were also installed as a part of the upgrade. I worked at a dealership and did
several of these old 8000 upgrades. A good cleanup and and new parts should get you some good service from
your 8600.

I would leave the springs out myself. I'm guessing that they caused too much drag on the brake assy and wore it out. Ford did not install them on the newer tractors, and everything worked just fine without them.

Im not sure but i may have found why it coulda been stuck out being it was all pitted on the bottom. I did stick the springs back in but i wont pull the otherside back apart to put some in as that was the only brake that worked anyway. And i do use the cnh brake oil im guessing prev owner at some point put in reg fluid. Nor sure if i should put a new master cyl on while im at it or just run it considering everything else is new now.

That pitting will definitely cause brake drag, and those springs aren't helping any. As I said in my last post, Ford stopped
using those in later models, so it's obvious to me that they decided that deleting the springs was the better way to go.