Disc brakes on Jinma 284

According to my manual there were drum brakes like you describe but the ones on my tractor are disc brakes. A different configuration. I have never seen anything quite like this before and have only the images in the manual to go by. I won’t know for sure about the expander ball part of it until I get it apart. Drum brakes I understand, disc brakes on vehicles I understand, these, not so much….

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Ah Ha!

This is pretty much what I had pictured in my mind based on the parts book drawings. This helps clear it up.

Based on the feel at the pedals I suspect there is rust/corrosion in the area where the balls contact the plates. Possibly a broken spring or two.

I am guessing there is no lube on any of the pivot points or the balls/ramps. I am guessing that some kind of lube would be a good idea for sliding metal parts.

What do you think would be best, a light coat of wheel bearing grease or a white grease like lubriplate?

Did you have to take the whole housing off to get these out or will they come out the end plate?

Thanks!

I don’t see any options for PM on this site.

stuart [at] harnerfarm [dot] net

Nope, already checked that. No fluid came out.

The feel on the pedal is more like the pressure plates are not rotating smoothly. I suspect rust or other corrosion on the plates or balls. Another possibility is a broken pressure plate spring.

I won’t know until I get it apart.

Hi Jeff,

This thread is 3 years old, I had to go back and review it to even remember what it was about. If I remember correctly I was able to fix mine by spraying some brake clean and then some lubrication onto the balls that sit between the steel discs. Once they started moving freely all I had to do was adjust free play and all was well.

Do you have disc brakes or drum brakes?

What kind of work are you doing to the brakes?