Re: farmall BN brakes

Posted by ScottyHOMEy on October 23, 2009 at 04:40:13 from (71.241.192.2):

In Reply to: farmall BN brakes posted by S.Gross(in pa) on October 23, 2009 at 02:39:04:

It depends some on what you mean by "not hold."

If they just aren't stopping the tractor the way they should, it could be a number of things. You may be able to tighten them up. Follow the arms on your pedals to the rods that tighten the bands (you have bands, not shoes). Remove the clevis from the rod (the pins are often worn and need driving or prying out) and thread the clevis further onto the rod and then reconnect. (If the rod falls out at this stage, you'll need to replace the rod and band, which are a single piece.)

Assuming nothing is brooken, correct adjustment procedure sounds a little weird but is right. You need to jack both sides of the rear up and then let it back down so that your drawbar rests on blocks to hold the rear tires up off the ground enough to turn freely. Start the tractor and put in gear just to get both tires turning. Then apply the brakes. Adjust them so that each wheel stops. If one stops before the other, back off the adjustment (loosen) the one that stops first until they stop at the same time.

If that doesn't do it, you likely have one of two other problems. The first would be that the lining on the bands is just worn out or separated from the band. The other is that they may be saturated with oil. Both brakes are situated on the differential shaft right next to a seal that tends to leak with age. If you see a lot of built up oil, dirt and chaff at the drain holes in the shaft housing right under the brakes (outer end on the right side, up against the transmission on the left), this is a good possibility. Checking either out will require some heavy disassembly, but it's not an ugly job.

For all that, if the brakes work to stop the tractor but you can't find a spot on the pawl to lock them on to park the tractor . . . two thoughts come to mind. The little pawl that flips over and the ratchet on the right brake pedal sometimes wear to a rounded state that they can't really hold. That can be fixed with a little light file work on either part as needed so that they mate and hold under tension. If that's all in good order, the other is that your brakes may have worn just enough that you're between teeth on the ratchet and pawl and can't find a spot with enough tension to hold. That can be fixed with just a slight tightening adjustment like I described up above, just enough to get you into a tooth that will hold it.

HTH

Replies:

• Re: farmall BN brakes S.Gross(in pa) 06:02:18 10/23/09 (1)
  • Re: farmall BN brakes ScottyHOMEy 06:32:48 10/23/09 (0)

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