brake booster
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Joined: Jan 2004
Posts: 13,851
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From: SW Va
With vacuum applied to the new booster & about 5 lbs of force on the boosters push rod to seat it, the distance from the high step @ the base of the mounting bolts, to the end of the seated push rod, should be one inch, +- almost nothing!!!!
So if your brake pedal tavel was ok before & you've adjusted the new boosters push rod to the same seated throw height, I should think your good to go.
If you find you don't like the pedal feel, travel, or height, or the pushrod height is too high & the brakes don't fully release & are dragging, the master cylinder can be unbolted & carefully set aside, without disconnecting the brake lines, to make another pushrod adjustment.
Let us know how it goes.
So if your brake pedal tavel was ok before & you've adjusted the new boosters push rod to the same seated throw height, I should think your good to go.
If you find you don't like the pedal feel, travel, or height, or the pushrod height is too high & the brakes don't fully release & are dragging, the master cylinder can be unbolted & carefully set aside, without disconnecting the brake lines, to make another pushrod adjustment.
Let us know how it goes.
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Joined: Jul 2007
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i really dont know what you meant by high step, i tryed to measuring everything on there nothing comes out to an inch. from the back of the lock nut to the tip of the push rod is 3/4 should i pull that out to one inch ?
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Joined: Jan 2004
Posts: 13,851
Likes: 111
From: SW Va
My manual showes the one inch height is measured from the surface of the boosters housing, at the base of where the master cylinders mounting studs come through, to the tip of the boosters actuating rod, with vacuum applied to the booster & about 5 lbs of inward force applied to the rod.
This inward push on the boosters rod, simulates the master cylinders return spring pressure & makes shure the rod is fully depressed, so your accurately setting the one inch height.
If the rod sticks out too much, the brakes won't fully release, when you take your foot off the pedal.
If the rod doesn't stick out enough, you won't have any brakes, when you apply them.
This inward push on the boosters rod, simulates the master cylinders return spring pressure & makes shure the rod is fully depressed, so your accurately setting the one inch height.
If the rod sticks out too much, the brakes won't fully release, when you take your foot off the pedal.
If the rod doesn't stick out enough, you won't have any brakes, when you apply them.
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