860 annoying brake squeal noise

davidl1632 · May 11, 2021

Put new shoes and springs on my 860 last year, and the RHS wheel makes a nasty squealing noise, as if a shoe edge is scraping on the drum somehow. It's not the wheel bearing. Cannot see how this happens - what do you think is causing this?

showcrop · May 11, 2021

Squealing is caused by dust. This AM our fire trucks got the undercarriages washed. This PM when I went out with the tanker it pulled hard right when I first braked. You can't tell specifically how one side will respond compared to the other.

Dean · May 11, 2021

Does it squeal all of the time or only when the brake is applied?

Does the squealing stop after several revolutions of the wheel with brake lightly applied?

Dean

strum456 · May 11, 2021

It could be dust, or it could be a spring or the edge of a shoe rubbing. If you ran it like that for little while already, whatever is making the noise will have marked the side of the drum well enough that it will be obvious what the problem is when you take it apart.

I had to weld the flat ends of the brake shafts that engage the shoes (had a groove worn in them and were not spreading the shoes properly). I believe that the holes in the backing plate where also oval from the brake shaft (welded that too). Welding the worn parts really fixed my brake problems on that tractor.

strum456 · May 11, 2021

I forgot to mention that the small pins that go through the springs that hold the shoes on were too long on mine. The retainer that holds the springs on was rubbing, which made a squeezing noise.

Did you replace the pins?

davidl1632 · May 13, 2021

Interesting! I used the original pins, and have looked carefully for shiny scraping marks on all parts of the brakes and drum. I cleaned it all and will check it our this morning. Thank you for your ideas and help.

davidl1632 · May 13, 2021

Dean, it squeals for the first 20 minutes of use, and stops if I dab the brakes, then starts again. It does stop for a while after several revolutions, but then starts up again.

davidl1632 · May 13, 2021

Dust - interesting idea. The brakes are not that dirty, but I've cleaned the whole assembly and will see what happens this morning.

Dean · May 13, 2021

Rust on the drums.

More consistent use will reduce or eliminate it.

Alternatively, you can loosen the adjusters a bit at the expense of brake effectiveness.

Dean

Dean · May 14, 2021

Perhaps I misinterpreted your response above.

Squealing caused by rust will usually stop after a few revolutions of the wheel, sooner if the brakes are lightly applied. Such squealing will usually not restart until after the tractor has been unused for several days allowing rust to reform.

If your brakes squeal and do not stop after usage as described above, you likely have a drum contacting the backing plate or return springs. Visual inspection should reveal such issues.

Dean

Texasmark · May 16, 2021

Agree. I don't know where my drums were made the last time I did my brakes but they rusted like overnight for a long time. I'd have to light pedal the brakes when running the first 100 feet to get it to stop every time I used the tractor. Then one day it stopped and haven't heard a squeak out of them since.

860 annoying brake squeal noise

davidl1632

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showcrop

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Dean

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strum456

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davidl1632

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