169 PTO brake assembly
 

I'm repairing the PTO clutch assembly on a 169 and have already ordered the parts for the assembly but am having a problem figuring out the brake disc unit on the release lever. My unit has almost no brake material left on the face of it and the unit is bolted to the lever using a bolt, washer and nut. I have a new bolt ordered but all diagrams show a compression spring somehow used with the bolt. It's called the "PTO Brake shoe pivot release spring #IH27452D" and I also have one of them ordered. Do I need it? And if I do, how does it used on the assembly? Please help an old confused guy put this all back together properly. Thanks for any information.

After looking at parts diagrams and the brake disc on the 169, it looks like the PO bolted the disc snugly to the release lever and never used a spring. I think that the spring must go between the back (concave) side of the disc and the release lever. That way, when the operator starts to disengage the clutch, the spring starts taking up some of the pressure and wear on the face of the disc until the clutch is finally disengaged. Kinda like the difference between gently applying the brakes on a car or truck and slamming the brake pedal hard. And that would also explain why there is no brake material left on the face of the disc on my tractor. Anyway, I'm going to try it as soon as the parts arrive and will see what happens. Stay tuned.

I can't remember but I believe the spring goes between the release lever and the brake disc to cushion the brake action.

The only one I ever dealt with was a 149 about 20 years ago. Really, I didn't deal with it, I just changed it over the the older design button release and did away with the brake due to the expense of buying the brake disc.

CC replacement parts have been sky high for years.:mad:

If the one I just worked on was put together correctly it’s bolt, disc, lever, spring, nut.

The bad thing about working on older tractors is that when something needs to be taken apart or replaced, one assumes that it was put together or replaced correctly by the last person to work on it. Makes life interesting anyway.

The parts breakdown does show the sequence I indicated for what that’s worth.

Now that I have rebuilt the pto clutch and put things back together, I'm quite sure that the proper way to attach the brake disc is: bolt, disc, lever, washer, spring, washer, nut. The first washer is needed to keep the spring from working it's way through the lever and into the disc. By assembling it this way, the spring on the back side of the lever allows just a little flexible movement to let the brake disc meet the face of the clutch squarely.
I had a little trouble removing the clutch assembly - the set screws had been rounded over by a PO and I had to use a cobalt drill to drill them out but with a little patience they all drilled out and the threads cleaned up nicely. My next project is to make a replacement brake pad replacement for the old shoe and see how well that works out.

I am the new proud owner of IH CC 169. I need to rebuild the PTO assembly and came across this thread that seemed to have come to a premature pause. I have a question before I start my PTO rebuild: Is there any value and utility in simply installing an electric PTO and putting the original manual PTO in a box for safe keeping ?

The block won’t be drilled to accept an electric clutch. You also need the basket pulley on there to run the starter generator.

Also, not sure IF you could make an electric clutch work that generator would keep up with that constant draw especially if you turned the lights on as well