YM186D brakes

Anonymous Poster · Nov 12, 2002

I've recently purchased a US sold (not grey market) 186D. Everything is almost new on this tractor, but the left brake was almost non-existant when I brought it home. the right brake is super. Unless this tractor was used exclusively in left turn manuvers, I don't see how one side could be so "out of it". I did adjust it, but it just doesn't seem to have the stopping "grab " that the right one does. Are these "wet" brakes? they are internal to the rear housing, but I've not a clue if they are easy to replace/repair. I've seen the recent post regarding a 15xx, but I don't know if brakes on that are the same as what I have on the 186D.

Pogo

Soundguy · Nov 12, 2002

They are internally housed.. but shouldn't be imersed. In fact, they should have a vent plug/tube. You may want to check to see if it has pluged.

There are many possible problems with the breaks, including simple rust / glazing on the surfaces preventing good bite.
Also, most of the shoes are reversable as they wear on one side only ( generally ). New springs can usually be matched up generically.

Other here will offer more specific advice.

Soundguy

allenp · Nov 12, 2002

If you need a set of springs. just drop me an e-mail. I have a new set of yanmar springs (still in the bag) that I purchased, which I do not need. I also had a problem with the left brake and assumed it was rust, glazing, springs rusted, etc. so I ordered the parts that I thought I would need ...in advance of starting the work. As it turns out, I had a very slight leak around a seal. The springs were in perfect shape no rust, so I did not replace them.

Will let you have 'em cheap.

rockyridgefarm · Nov 12, 2002

I found mine to be easier to service by setting the tractor on blocks and removing that rear wheel. Best bet is to get it open and clean them, and take the glaze off the pads. They are WAY HIGH to replace. Sometimes they don't seem to have had a vent, probably a good idea to add one...

I have heard about oufits that will reshoe them.

I don't think there is a JD cross, when I bought mine, my Deere dealer usually recommended a Deere part, if there was...

I do have an extra used set of pads, if push came to shove, I might sell...

EFC · Nov 12, 2002

The reason the left brake is always bad is because people use their brakes unlocked to help them steer so when the put the brake lock on it only holds the left pedal down. They get back on the tractor and forget about it till they drive around for awhile. My dad was famous for that. I [censored] near became a left brake expert by the time I made it off the ranch.

JeffRey30747 · Nov 13, 2002

The Yanmar OEM shoes that I put on my 186D were marked part # 198223-36510 and have JD670 on them also. Whether this means they also fit a JD670 or if there even is a JD670, I don't know. I do know that the shoes from Yanmar were expensive!/w3tcompact/icons/wink.gif

Anonymous Poster · Nov 14, 2002

Hey, thanks all for the information. Allenp, you mentioned a leak around a seal. I found the inside of my left brake compartment (super easy to get at) had about a quarter cup of rusty, dirty oil in in and it was soaked into the brake shoes. I cleaned as best I could with brake clean, and then washed the pads with freon TF. I don't see any "vent" that has been mentioned. I DO have a hole in the bottom of the brake chamber that's plugged with a pipe plug. Should I just remove the plug? I want to replace the seal around that brake drum shaft. I think I'm going to get soaked with oil, right?... ok, time to drain the fluid. Allenp, was replacing the seal a big deal?

Pogo

allenp · Nov 14, 2002

Pogo,

I am not familiar with the YM186 and my only experience is on a YM1700. On this tractor, there is a vent tube on the top of the brake drum housing with a hose that loops to the rear. There is also a drain plug on the bottom, which is to drain water out of the housing should you operate the tractor in deep water. At least on a YM1700, replacing the seal is a piece of cake. It takes no more than 1-2 hours, however, you do have to drain the transmission oil or it will be messy

The hardest part I experienced was getting all the oil out of the brake pads. Tried brake cleaner (no help), freon based solvents, (no help), and finally tried a couple of tips I received here. I soaked the pads in gasoline for a couple of hours, allowed them to air dry, then I used a small propane torch and applied heat directly to the pads – a little at the time- until the grease & oil burn off. It’s had to describe but once you begin, it will be clear. A word of caution, too much heat and the pads will become brittle and flake off (so I’m told).

You may get by with draining the fluid off on occasion and not have to do anything.

JeffRey30747 · Nov 15, 2002

I had the "pipe plugs" on my 186D. they seemed to be holding in condensation and any oil that might leak out. They were frozen in place so tight that I rounded them off trying to remove them. So, I cut them off smooth with the bottom of the tractor and drilled them out so that anything in there will drain out and not get on the shoes. The brakes seem to work much better now.