![]() ![]() This is why I am surprised to have this problem. Yes the booster push rod clearance is adjustable, but I have never seen the need to adjust it after changing master cylinders. As i said, this master cylinder was redone about 500 or so miles ago. Is there another one I am missing? Or is the smaller hole somewhere inside the bigger one. ![]() Appears to look like mildly rusted steel. I see a clear hole but there doesn't seem to be any opening in the bottom of the hole. About 1/16th of and inch or so in diameter. The one I have been trying to open is the one toward the back of the car. I see two holes, one slightly larger that the other with the bigger one toward the front of the car. You should only have 1/8 to 1/4 free play in the brake pedal. However, I cant for the life of me seem to move the adjuster I obviously dont have the 500 SST wrench made just. Using the jig Toyota was kind enough to provide with the new MC, it appears I need to move it in about 2mm. When I pushed a wire down into the hole, I could feel the rubber cup, which is not supposed to be blocking that passage. Anyways, Im currently in the process of replacing the MC and got to the point where I need to adjust the brake push rod. Is it that you can't find the hole or that you are unable to get a wire inside it? In my case, I was using a rubber cup in the master cylinder assembly that was too wide and it was blocking the relief port. ![]() The smaller one is right behind it, toward the rear of the car. This all came about after pedal bleeding the brakes and pushing the servo rod out too far, making the brakes (all 4 wheels) lock on, requiring it to be wound back in.I just went through this a couple of weeks ago. You can actually see the tiny seal that goes past the return valve (side hose, closest to the servo when mounted) by looking through the opening and pushing the piston in by hand very gently, this will give you some idea of how far the piston engages before the return is blocked - not very far at all. The important part is to not set the rod in a way that it engages the piston in the master cylinder at resting position, so as to block the return valve on the cylinder. I managed to adjust the pushrod correctly through trial and error and eventually got it set correctly.Īfter winding the pushrod in or out, offer up the master cylinder (with reservoir and all hoses removed) and as you push it right up to the servo wall you should see a tiny amount of fluid starting to move, a very tiny amount. To Close this up for anyone who finds it. ![]()
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