Lock up brakes

I will wait for the answer and I am glad to be here..

Hi,

I'm not familiar with this vehicle. However, I'll try my best to help.

When you say it locks up when you start the engine, does it require you to first apply the brake or does it happen automatically? Also, what type of power brake assist does this vehicle have? Is it vacuum actuated?

Let me know.

Take care,
Joe

I have no information specific to your vehicle.

It does sound as though that maybe the adjustment rod/ screw found in between the vacuum booster and the master cylinder may be "adjusted out" a little too far.

Sometimes getting it just right may require a few times of trial and error.

You might even try to find a better procedure from a local source that may make this easier for you.

Although this is "not" your vehicle at all in my pic, it may explain what I'm suggesting. I say again, this pic is just a generic one.

The Medic

How will I adjust the rod? Is it inward or outward?

CJ MEDEVAC, how will I adjust the rod? Is it inward or outward?

Joe, it happens when I apply the brakes.

Does it have a vacuum assist brake booster? If you disconnect the booster, does it happen? As far as the rod CJ is referring to, if adjustable, it would need turned in slightly. If you try that, make sure the brakes are working properly before driving it.

Joe, when I disconnect the hose from the booster the brake don't lock up.. Then I connect again and the brake lock up.

Is it a vacuum assist brake boost system? Also, do you know if there is an adjustable push rod?

Joe, it's vacuum assisted brake system..
I saw an adjustable push rod in the booster..

Hi,

Please understand I don't have technical info on this vehicle, but it sounds like the push rod needs retracted a bit. When the assist is actuated (vacuum), it sounds like the travel for the push rod isn't there any longer.