1973 14 AUTO PARKING BRAKE LINKAGE PHOTO?

[Short Circuit 27]

Does anyone have PHOTOS of the parking brake external linkage on a 1973 or earlier WH Auto trans tractor, with the internal brake pawl mechanism.

I am trying to determine if my linkage is installed wrong.

The brake pawl was chewed up, and reinstalling the linkage after repairing it does not release the brake pawl when put into "drive" position.

There's nothing in the manuals about adjusting it.

Thanks.

Edited April 28, 2016 by Short Circuit

[pfrederi 17,173]

Is this what you need??? it is from an Electro 12  She is open right now so if you need additional views just ask.

Edited April 30, 2016 by pfrederi

[Short Circuit 27]

Thank you pfrederi! Do you also have a photo of the handle that engages the brake? Perhaps on the other side?

On my tractor, the brake handle is an extension of the silver arm on the left of the spring.

[pfrederi 17,173]

It is sort of out the top of the picture but the silver rod that seems to stick straight out of the top of the idler pulley is the brake/hydro engagement handle.

 

The red lever that starts just forward of the filter and has a spring on the front end is attached to and move the parking pawl in the transmission.

 

I will take some more pics later today.

 

[pfrederi 17,173]

Picture in first post is Brake engaged hydro unit disengaged.

 

This picture is opposite Brake off hydro on.

[Short Circuit 27]

THANK YOU pfrederi!

 

    I have been studying this mechanism from your photos, and my arrangement which are very similar. It looks like Wheel Horse did a poor design job.

 

For example:

     When you put the parking brake on (pull up on the handle) two things must happen: the drive belt is disengaged, and the brake pawl arm should be allowed to raise with the spring pressure, which makes the internal pawl drop into the internal gear to lock the transmission.

      When you release the parking brake (push down on the handle) to run the tractor, the drive belt is engaged, and the brake pawl arm should be pushed down to raise the internal brake pawl off the internal gear. In the pictures and on my tractor, if the handle is pulled up, the pawl arm goes down, just the opposite of what should happen.

    It doesn't look like the mechanical arrangement works like it should in looking at the pictures and my tractor. It doesn't look like the brake pawl arm is ever high enough to make the internal pawl raise above the gear to clear it when in run mode. Every brake pawl that I have seen that has been damaged, has the same amount of metal shaved off (about half of the face of the pawl). This seems to me likely that all the designs are not fully releasing the brake pawl in "park" position.

    Anyone want to chime in on this with your thoughts?

 

Thanks.

[pfrederi 17,173]

First keep in mind there is no belt on here.  If you look at the first picture (brake on) you can see the tip of the brake pawl arm is above the main frame rail.  In the second (somewhat different perspective I know) but the tip of the brake pawl arm is just below the main frame rail.  If the belt was on it would be pushed down a bit further.  I will put a belt on later today and snap another picture. 

 

The brake pawl wear is from, I believe, pulling up on the handle while gears were still moving....