If it measured over two inches you will need to extend the push rod length. Master power brakes recommends that the distance between the pin from the booster and the hole in your master cylinder be approximately 0020.
Brake Booster Push Rod Length Gauge
Brake push rod length. Using a square mark the push rod at the 90 setting from centerline of s cam shaft to push rod. The push rod has a nut which can be turned outward or inward to increase or decrease its length. Turn the adjusting nut on the push rod inward or outward to shorten or lengthen the rod. You will need to use pliers for the push rod to be adjusted accordingly. In most cases the length will be roughly020. This will cause your soft pedal.
Remember your free play travel length on your brake pedal. Tighten the holding nuts to the bracket studs 100140 lb. Turns out my push rod needed adjusted. If this distance is greater than 0020 when you first push the pedal you will have to overcome this distance and get the pin to the master cylinder. This will determine the proper length of the push rod prior to installation of the yoke and will assure a push rod to slack adjuster angle greater than 90 with the chamber at zero 0 stroke. Again mark the rod.
If the rod is already too short remove the original shims. If you cant make adjustments onto the push rod itself you can use a shim to shorten the rod. Place the brake chamber into the appropriate brake assembly bracket. My brake pedal was super soft after a brake booster replacement. No preloaded like mentioned above a scant amount of play to about 116 good to have a little play in the pedal to booster also a vacuum plug on the brake light switch will keep it from rattling. Onto the push rod b.
White logo shirt https. Install the appropriate style. See figure 1 mark 1. Measure the distance from the centerline of the s cam to the centerline of the push rod see figure 2 dimension athis measurement should be equal to the length of the brake. 4 adjust the push rod to access the push rod the cylinder needs to be disconnected first. Pedal is more firm now and brakes much better.
From mark 1 measure back toward the brake chamber mounting surface in accordance with chart a x dimension make a second mark and cut the push rod at mark 2 see figure 1. Have your assistant gently apply the brakes to force the push rod out of the booster so you can see the adjusting nut. If the a dimension on a type 30 installation measured 5 inches and the yoke.
Gallery of Brake Push Rod Length
