Rear Brake Disc/Parking Adjustment Options

[trdproven]

Are there any adjustments that need to be made if you put on a new caliper I noticed these celicas use a duo servo mechanical drum parking brake design, where the cable goes into from behind the rotor vice externally. is the only rear parking brake adjustment in the center glove only? I keep reading you adjust something in the rotor first and then move on to the adjustment in the center glove. is that an adjustment in the rotor where that rubber plug is? I noticed when I looked into the rubber plug, its not very clear what to adjust there, the toyota service manual is not very detailed. it says to adjust something so that pads basically lock the rotor, the description sounds like drum brakes but it was listed under disc brakes and drum brake shoes had its only paragraph. Just wondering if anyone knew. I'm used to the hondas rear brake set up.

This what the manual says:
Disc Brakes
Raise and support rear of vehicle. Remove rear wheel. Release
parking brake. Remove adjustment hole plug from rear rotor. Turn
adjuster until parking brake shoes lock rotor. Back off adjuster 8
notches.

This post has been edited by trdproven: Jul 7, 2012 - 2:56 AM

[Galcobar]

As I've explained and showed you repeatedly in your other thread on brakes, Toyota uses a drum-in-disc design. The caliper is used for regular braking, grabbing the disc with pads. The parking brake uses shoes, applied to the inside of the drum. The rear rotor incorporates both a disc and a drum.

Azian Advanced was kind enough to link you a picture of the Celica's rear brake setup, with the rotor removed. You can see the caliper holding the pads, and the parking brake holding the shoes. That silver cylinder at the bottom with the notched wheel is the adjuster.

When the hub turns, the rotor turns. This is because the rotor is mounted on the hub -- you'll note both the lugs and the centre hub stick through the rotor. The rotor must be properly installed on the hub so that its access hole lines up with the largest hole in the hub. This allows you to access the parking brake hardware, which is behind the hub, even when the rotor is in place. If your rotor is managing to turn separately from the hub, you have sheared off the lugs and are about to have a very bad day.

The point of putting on the lug nuts is to ensure the rotor is properly positioned on the hub. Otherwise, it rattles, and a loose rotor is a bad idea when trying to properly position the parking brake shoes.

And yes, when setting the parking brake shoes you hold the release button down and the lever up, so that the parking brake does not lock into place.

This post has been edited by Galcobar: Jul 8, 2012 - 5:42 PM