Brakes

[John Kinnane]

G’day I have just finished a complete brake overhaul on my Mitubishi Pajero/ Shogun. I replaced all the hoses, glide pins. I used ECD dimpled and grooved rotors on all wheels I also put new pads all round. The only pain I had was replacing the E brake shoes, calls for a lot of patients.

The only job that I have now is a complete brake overhaul on a 2006 Honda Accord Euro, but I am not expecting anything too difficult. Talk to you next time Johnno

Topic

[Lorrin Barth]

I don’t get it. I used to have a DSM and the parking brake caused the rear caliper piston to extend and the rear wheels were locked like a safe door. There was no way I could move the car with the engine.

My present car, an eleven year newer Mitsubishi Lancer Evolution has the little drum parking brake inside the rotor. I can set the parking brake on this rig and back out of the driveway and it acts like it is not even set until I try to move car forward, then I can feel it enough to know to release the brake. So, how is this better?

[Joshua Thompson]

The servo action of the drum brakes help stop a car moving forward…one of the few benefits of drum brakes. When its moving backwards, it is much harder for a drum brake to stop the wheel because of the way the drum is designed….

But I agree….did drum in hat park brakes on a derdge this summer….major PITA with the halfshaft in the way. Could barely see what I was doing…

[Lorrin Barth]

[quote=”meleemaker” post=80614]The servo action of the drum brakes help stop a car moving forward…one of the few benefits of drum brakes. When its moving backwards, it is much harder for a drum brake to stop the wheel because of the way the drum is designed….[/quote]

I never thought of it before but yeah, if counting on the parking brake to hold on a hill I had better be parked with the front pointed down hill. Otherwise, where’s my car?

[Joshua Thompson]

That is just one pe of drum brake system. There are 3 types of parking brakes: Drum w/ cable, Top Hat design, and Spiral piston.

From there, only the drum and top hat design use drum parking brakes.

And it narrows farther to Non Servo where each brake is applied individually and have a self energizing action to improve braking….these have double trailing and leading trailing brake designs. And Dual Servo which has the force multiplier and allows the drum to hold well in both directions and is one of the more common drum designs.

Few cars, if any, have non servo drum brakes in the rear. Most have dual servo or integrated or top hat design parking brakes.

[Lorrin Barth]

MY DSM (a Mitsubishi) with disc brakes in the rear had a piston in the caliper that rotated and screwed out when the cable was pulled. Is that what you are referring to as spiral piston?

[Joshua Thompson]

Yup, diamond star motors liked this design because it allowed them to have discs all the way around with a quality parking brake.

They are a major PITA without propper tools. They have to be turned and compressed at the same time to move them using a socket and a brake cube or other brake service tool to do it.

[Lorrin Barth]

I never had reason to have the rear calipers apart but a super parking brake. It simply locked the car in place. If you forgot and tried to back with the parking brake applied the AWD system had enough slack in it to allow the front wheels to move a little and the car would rise up like a cat arching it’s back.

[Author]

Replies