Brake seal and collar replacement - YM1601 (YM2000 similar)

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agirlandhertractor
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Brake seal and collar replacement - YM1601 (YM2000 similar)

Postby agirlandhertractor » Sat Mar 01, 2014 8:52 pm

Here's a how-to on changing out a leaky rear brake seal and seal collar. This was done on a YM1601D which will be nearly identical to the YM2000 and probably a few other models.

Symptoms of this repair was oil leaking around the brake backing plate on the left side. Since this is an old tractor I decided to go ahead and do both sides. Hoye has a good write up on R&R brake shoes. This deals specifically with the seal and collar.

Repair time
About an hour per side - maybe a little more or less depending on tractor and mechanic skill.

Parts needed for both brakes
2 brake backing plate gaskets
2 brake collar seals
2 brake collars
2 cotter pins

Repair overview
  1. Jack rear of tractor and support with sturdy jackstands (min 2 ton to be safe)
  2. Remove rear wheel (optional but gives you more room to work)
  3. Remove 6 bolts securing backing plate to axle housing and remove backing plate. Set backing plate aside.
  4. Remove 27mm snap ring (aka retaining ring). You'll need a .07 snap ring tip.
  5. Remove brake drum
  6. Remove seal
  7. Remove collar

To reinstall, go in reverse.



Repair with pics
  1. Jack rear of tractor and support with sturdy jackstands (min 2 ton to be safe)
  2. Remove rear wheel (optional but gives you more room to work)
  3. Remove brake rod. Discard old cotter pin.
  4. Remove 6 bolts securing backing plate to axle housing and remove backing plate. Set backing plate aside.

    Image

    Note: obviously my shoes were soaked in hydraulic fluid. I opted to clean and reuse them since they were barely worn from a brake job a few years ago.

  5. Remove 27mm snap ring (aka retaining ring). You'll need a .07 snap ring tip.

    Image

  6. Remove brake drum. If drum is tight, you may need a puller.

    Image

  7. Remove seal with a flat bladed screwdriver. It's OK if you damage the seal on remove - you're replacing it. Be careful not to drive your screwdriver deep past the seal as there is a bearing behind it. Just grab the edge then twist/pull it out. Pic of area after seal removed:

    Image

  8. Remove collar. I found the 18" "Pittsburgh" pry bar from Harbor Freight has a perfect bend and worked well.

    Image

    Gently apply pressure on the back of the collar. It has a rubber inside surface and should gently slide off the shaft. Careful not to scratch the shaft surface.

    Image

    Old collar:
    Image


Installing new collar and seal
  1. Apply a thin coat of grease to inside of new collar. I also put a little grease on the back edge of the brake shaft where the collar sits.
  2. Slide the collar as far back as it will go without force.
  3. Temporarily slide the brake drum on the shaft. Use a block of wood and mallet to tap the collar down on the shaft. You'll feel it tap up against the bearing. Remove drum.

    Image
  4. Again, grease up the inside and outside of the collar seal. I also put some grease on the surfaces around the shaft and collar. No need to slather it on - just a thin layer is enough.
  5. Temporarily slide the brake drum on the shaft. Use a block of wood and mallet to tap the seal into the seal cavity. The drum will get the seal flush with the brake cage. Remove drum.
  6. Use a deep well socket and carefully drive the seal the rest of the way in. You'll feel it bump up against the bearing.

    Image

    Image
  7. If the inside of your brake compartment is crusty or oily - clean before going ahead. Be sure your drain hole is clear and free of obstruction.
  8. If you had to use a puller to remove the drum, use an angled pick to scrape the crust/dirt out of the shaft splines. Do this on the shaft and the brake drum.
  9. Finished seal & collar replacement:
    Image
  10. Reattach backing plate and secure with 6 bolts.
  11. Reattach brake rod and new cotter pin
  12. Reinstall wheel

Feel free to add any tips/suggestions/corrections in a reply.

winston
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Posts: 4677
Joined: Mon Feb 01, 2010 7:29 am
Location: North East Texas

Re: Brake seal and collar replacement - YM1601 (YM2000 simil

Postby winston » Sun Mar 02, 2014 6:51 am

Very nice write up. Thank you.

Aaron
Site Administrator
Posts: 2769
Joined: Thu Jul 26, 2007 12:39 pm
Location: Iowa Park, TX

Re: Brake seal and collar replacement - YM1601 (YM2000 simil

Postby Aaron » Tue Mar 11, 2014 12:27 pm

Great job on the write-up!


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