case 300 brake help

[kenbob]

I would like to have at least one brake on my case 311 to work well enough that the parking brake would hold. I have read the manual, but some things just aren't in there so as usual, I am asking for help from the great minds on this site. I took the brake off. No surprises there except the bottom front stud came out and that taps into the oil in the rear end. I wasn't ready for that. Good thing: the axle seals are not leaking. It is all nice and reasonably clean inside. My dumb question of the day is am I supposed to see some sort of lining material--is it glazed over or gone? Hit it with the wire wheel just to see what would happen and it seems like it is lining. When I looke at the disk on end I see 3 layers. They are all about the same thickness. I don't see any of the radial lines like I do when searching for replacement disks.

IF I what I have in those 3 layers is linings, am I good to go with a deglazing or are they too far gone.

Last question. The center actuator looks good on both sides. How much are those things supposed to spread when you pull on the lever. I am getting about 1/8"-1/4" at best. Unless that is normal, I know how to take apart and clean. Thanks all for the expert advice in advance.

 

[Tgrasher]

Sounds like your thinking as I would and the deglazing is the cure. I go by how close to the rivet heads the plates are worn and how much the tractor will be used in braking situations.

 

[kenbob]

Sounds like your thinking as I would and the deglazing is the cure. I go by how close to the rivet heads the plates are worn and how much the tractor will be used in braking situations.

RIght now I can't even see the rivet heads. I will deglaze and see if they show up. I have enough brake as is for my usage except the brake lock won't hold on a hill, even though the mechanisim itself works fine. Thanks for the advice. Will report later.

 

[Joe (Wa)]

Original 300 brake disc are not riveted. There is a metal splined center with a friction disc bonded on each side. Check the discs for warpage. Check the slide disk assembles, cover and transmission housing smooth and clean in way of friction discs contact. The chrome cladding tends to wear off the balls, replace them if so. Ball ramps sometimes develop small rounded ridges, clean them out with emery cloth.

When the cover is installed, jack up the wheel, tighten the adjustment nut until there is a very light drag on the wheel and back off the nut about 3 turns and check the wheel free turning.

Here is a pic if you don't have a Case manual.

 

[kenbob]

Joe, everything looks remarkably good except for the glaze. Not even any gouges. Ball sockets are smooth. Should there be any lube applied to the ball sockets. I was thinking of teflon dry lube. Also should the splines be lubed the discs slide on. I guess I am looking at original brakes. No rivets. Maybe at sometime back a Case dealer did the brakes with factory parts. Tractor was well used, though not a loader tractor. IF the material is about the same thickness as the center disk, do I have enough? As I said, I only want the parking brake to hold.

 

[Joe (Wa)]

I never lubed anything, don't do anything that will get it on the friction discs. I don't have a disc to look at right now but if the wear is even and thickness 1/8 inch or more all the way around on the edge I would reuse it. Just knock the glaze off with sandpaper or very lightly with a fine file.

Here is the brake instruction in the Case manual, see fig E-60 & E-61 housing. You don't need the G15017, just eyeball it, the original studs are close to bodybound to compensate for the braking torque on the cover. If you are going to use the pedal's interlock you need to adjust both brakes the same.

The brake lock often has a worn or missing spring under the foot board. The rod may be bent and flexing under load, the brake pedals shouldn't be spongy on the lock. The pawl and the notches in the brake pedal may be worn, do some filing. If you have good brakes with your foot, there is no reason except wear or missing parts that the lock won't hold it.

 

[kenbob]

Thanks, Joe, you covered it all as usual.

 

[kenbob]

Got it done! Have not adjusted the brakes yet, but I ran it up a hill, it rolled back, and the parking brake held! Hardest part of the job was putting it together and cleaning up the oil mess from the stud coming out. Thanks all for the help and advice.