Case 580K Brake issue

[grapeman]

I recently purchased a Phase 1 580K backhoe. The seller said it had a brake problem. Here is what I found out by "testing"If you get on the machine and do not use the brakes at all, everything is good. ( except brakes) The first time you use brakes, they tend to "hang up" You can feel them dragging and bogging down tractor. The manual calls for 3 1/2 inch of free travel on pedal. There is only about 1/2 inch. Here is what I suspect....by reading the forums I found out that you do not use brake fluid in system, but rather tractor/transmission fluid. I think someone has put brake fluid in system, thus causing the problem. Here is my question(s).
1) How can you tell for sure if the system has brake fluid in it as opposed to tractor/transmission fluid?
2) Assuming it is brake fluid, what parts needs to be replaced. I know the 2 master cylinders need to be rebuild and the flex lines going to the actuators need to be replaced. Is there anything else that needs to be done to get brake system restored to take the proper fluid.
Does someone have some experience on this? Would also be interested to see if others think this may be the problem.
thank you

 

[Swetz]

grapeman,

I do not have a bunch of experience to share, however, I do know that if you take the fluid that is currently in the system and mix it with water, one of two things should happen...brake fluid is water soluble, and turns a little whitish when mixed with water...Oil on the other hand floats on water. by taking the fluid that is currently in the brake system, you can quickly find out if it is indeed brake fluid if you pour some into a cup of water.

 

[gggraham]

If you only have 1/2" travel perhaps the brakes are adjusted too high and this will cause the brakes to lock and bind. If it is brake fluid in there the slave cylinders need new seals as well. But first take the green rubber boots off the top of the slave cylinders, I believe you need a 5/8" and an 11/16" wrench. Break the locking nut loose and back the adjuster nut off so you have more brake pedal travel see how that goes. #2 what is in the transaxle for fluid? If someone just put gear lube in without a limited slip additive that can cause these brakes to bind a bit as well and will cause brake chatter. . It should be Case Transaxle Fluid or gear lube with limited slip added.

 

[grapeman]

Okay I took swetz advice and it is brake fluid. I drained all the fluid out and am going to flush and refill with proper fluid. Maybe I’ll get lucky and perhaps the brake fluid did not ruin the seals. When I opened the bleed valve the pedal resumed travel to end of stroke. The actuator and the slave cylinder are different name for same thing right.?

 

[Outdoort]

The master chlinder is the piston device located below the reservor. The slave cylinder is usually the secondary cylinder that is downstream from the master cylinder that would acuate the brakes/clutch. Think the master controls the slave. I dont know much about the braking systems on these thinks since i just got my first backhoe about a week ago (super k).

 

[DMiller]

If has had brake fluid on oil rated cups and seals they will be swollen and likely need replaced. Easier to do now and will not get all the brake fluid out otherwise.

 

[Willie B]

I took pictures of the manual, but Daughter in law was tinkering with my phone, now I can't send pictures to my computer.
They say with wheels in the air, tighten brake adjuster until significant drag is felt, then back off two revolutions.
I don't know whether brake fluid ruined your cylinders, but in the event of a leak, you DON'T want it leaking into your transaxle!
Case specified Case TCH fluid, now they specify Case/IH Hy Tran. I bought a 580K once, the seller was proud it had just had a complete fluid change. Used generic fluids. Case Transaxle lube has additives to make the brake friction surfaces work properly. With the generic stuff, (probably 90 weight gear oil) use the brakes going down a steep hill it sounded like grinding gears. With proper fluid it does not.

 

[Vetech63]

Any brake fluid in the system and your seals are toast.......its just a matter of time. Im wanting to say they use a 10 wt. mineral oil, but I dont remember at the moment.

 

[Tinkerer]

grapeman ; If you need the operator's or service manual PM me your email address.
I would need to know which phase your 580K is tho.

From the operators manual.

 

[grapeman]

Update on brake issue. I drained all the fluid out of the brake system. The first fluid to come out appeared to be the correct fluid. I think the brake fluid was just added to top off the system and I’m not certain that it contaminated the entire system. Anyway I flushed all the fluid out by bleeding the brakes. I adjusted the brakes per the manual. And yes they were adjusted to tight. After adding the proper fluid and adjusting the brakes they seem to work fine. And now I have proper pedal travel. Did I just get lucky?

 

[Willie B]

I hope you did. These have a fussy crossover valve. You step on two peddles at once the valve is open to equalize the peddle travel of the two masters. when you press one peddle the valve closes. If I recall the parts include a little ball & two springs.

 

[garrett640804]

grapeman ; If you need the operator's or service manual PM me your email address.
I would need to know which phase your 580K is tho.

From the operators manual.

View attachment 239216

Tinkerer are you able to get a copy of the service manual?

 

[Tinkerer]

Tinkerer are you able to get a copy of the service manual?

Is your tractor a 580K or a 580K Series 3 ??
Each model has it's own specific manual.