e brake for Knoobs (busted ferrule?)

[Rusty Marlin]

The distances are not scaled to the 80 series, numbers are chosen to represent easy math. 3:1 for Bell crank and 4:1 for parking Brake Shoe Lever, hence 3*4=12
The bell crank is on the Outside (behind) the drum. Its has leverage multiplier effect on the parking brake shoe lever (Inside the Drum).
Lets see if this makes more sence to you. Image is from a generic drum brake for a trailer, but all the basic parts are there.

 

[landcruiser3DP]

The distances are not scaled to the 80 series, numbers are chosen to represent easy math. 3:1 for Bell crank and 4:1 for parking Brake Shoe Lever, hence 3*4=12
The bell crank is on the Outside (behind) the drum. Its has leverage multiplier effect on the parking brake shoe lever (Inside the Drum).
Lets see if this makes more sence to you. Image is from a generic drum brake for a trailer, but all the basic parts are there.
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hey. thanks for your replies on this.
i can see how the end of the cable on my right drum is not attached. i can also now see the really dark part on the right drum is the same part as the really shiny one on the left assembly so i can see it will probably accept the ferrule.
probably not ideal driving as it is.
can i just ask about that "splitter" at the rear axle? is there a name for it? i kind of pulled on it idiotically thinking i could figure out what was going on but of course the fertile end on the right wasn't attached.
but also i was pulling in the sheathing coming from the lever at the driver and its a cable inside.
but dies this configuration pull the cable at the axle sort of equally on both sides when it gets pulled normally? or does it pull the left side brake and kind of dead end at the sand time such then pulls the right brake?
i couldn't quite make out how it works?
i mean aside from the e brake itself which i am looking forward to reading about.

 

[landcruiser3DP]

THANKS all
i was able to get that ferrule up into the metal disk shaped thing (maybe the parking brake shoe lever) that holds it. i got a screwdriver in there to force the disk inward then a hooked pic to pull the ferrule up.

 

[landcruiser3DP]

The distances are not scaled to the 80 series, numbers are chosen to represent easy math. 3:1 for Bell crank and 4:1 for parking Brake Shoe Lever, hence 3*4=12
The bell crank is on the Outside (behind) the drum. Its has leverage multiplier effect on the parking brake shoe lever (Inside the Drum).
Lets see if this makes more sence to you. Image is from a generic drum brake for a trailer, but all the basic parts are there.
View attachment 3696598
View attachment 3696589
View attachment 3696597

hey RM,
i'm starting to realize you may have drawn that in which case it's both awesome help (thanks) but also great for the forum.
i think it's making sense. the one thing i didn't catch - well RED seems like pulling on the cable to the bell crank pulls the opposite side brake shoe inward (GREEN)?
then this opposite side brake shoe has a pivot point so it pushes sort of up and out at like 2:00?
the one thing i didn't catch is how the opposite shoe gets pushed out. i mean not totally important since i now have two sides brake when i probably only had like 1/3 of an e brake working there until i opened it up.
but also i now understand mostly how it works which is pretty cool...

 

[Rusty Marlin]

hey RM,
i'm starting to realize you may have drawn that in which case it's both awesome help (thanks) but also great for the forum.
i think it's making sense. the one thing i didn't catch - well RED seems like pulling on the cable to the bell crank pulls the opposite side brake shoe inward (GREEN)?
then this opposite side brake shoe has a pivot point so it pushes sort of up and out at like 2:00?
the one thing i didn't catch is how the opposite shoe gets pushed out. i mean not totally important since i now have two sides brake when i probably only had like 1/3 of an e brake working there until i opened it up.
but also i now understand mostly how it works which is pretty cool...

View attachment 3699224

View attachment 3699225

Yes, the drawing was completed on my lunch break with power point then "Snipped" in to the forum.
Your lower red arrow force is in the wrong place. It belongs up at, and parallel with, the Shoe strut, (flat bar that "connects" the shoes together). Remember that bar only functions as a compressed member.
Go see my post 21 again. All those parts are in the brake system you are posting pictures of, just mirrored. I would recommend finding the parts in the marked up drawing and correlating them to the parts you can touch on the truck. Make them function by hand, observe and feel the motions desribed in the verbage on the second sheet in post 21. With out the drum on there to constain the brake pad movment, it make look a little wonky when the parts move.

 

[Rusty Marlin]

Conserning your E-Brake cable question, yes the connector in the middle that creates a Y is an equalizer. Theoreticlly both sides should move at the same time, but they never do, due to friction, debris, whatever. So the side that moves the easiest, gets the movment first, when those parts can't move any further the other side loads up, then with further applied load on the handle both sides compress the brake shoes into the drums.