Hydroboost conversion...
To Jim and Strokersace, understanding that the pedal its pretty much instant, with no to much play, could be normal, the real breaking action is very different than before, without the HB?. I mean its worth to do the conversion?
My 97 has the HB factory. What I recommend to everyone that is not used to this system, after you switch it over, Do an emergency stop with your truck before you have to. The pedal will act quite different. You will actually have a lot of pedal at first, then it will pump up from the HB. Nothing wrong with it, but it is a weird feeling if you're not used to it. The pedal will almost hit the floor, then it will raise up on its own. And you will stop!!!
My 97 has the HB factory. What I recommend to everyone that is not used to this system, after you switch it over, Do an emergency stop with your truck before you have to. The pedal will act quite different. You will actually have a lot of pedal at first, then it will pump up from the HB. Nothing wrong with it, but it is a weird feeling if you're not used to it. The pedal will almost hit the floor, then it will raise up on its own. And you will stop!!!
Good to know that, thanks for to share it
Does your cruise work? I know if that sensor goes bad it won't set the abs light but the.cruise doesn't work. As for them grabbing, it my be you rabs valve or could mean that your park brakes are still slightly engaged, or they just need adjusted. They are supposed to self adjust but don't always do so. Try backing up quickly and jamming on the brakes to see if that helps.
As for pedal, its pretty much instant. Takes more pressure to apply than before too.
Gotta catch this flight. Will check back later.
As for pedal, its pretty much instant. Takes more pressure to apply than before too.
Gotta catch this flight. Will check back later.
Well, update. I finished this conversion this morning, and I found some helpful info. Most importantly, the pushrod from the vac boost is significantly longer than what is needed for the hydro. Second, if you didn't get a pushrod with your hydro, as mine didn't every parts person will look at you like you have two heads when you ask if you can just get it. So, as I work to upgrade everything on my truck, mickey mouse now lives in my brake system
Here's what I did: I bought a 12" section of 1/2" threaded rod, and cut it into sections of different length. I bought a 1/2" fender washer that was the same outside diameter as the housing of the master cyl. Then, I bought a compression spring that fit the smaller opening in the pusher in the hydro. The rod actually threaded into the opening in the master cyl, then the washer fit over that, and the spring went over than, then I bolted it all together. All the parts were from Home depot, and the rod length I used was 3 3/4". All in all, it works perfect, except that I believe that my power steering pump is worn out, because the brakes are pretty firm. Not that it's bad, and not that that is my only clue, but I think I'm going to upgrade to the 450 pump in the future. Actually, I was curious what axles Ford ran under the 450's; I might wanna steal some axles if they're heavier. If not, I'm just do a master upgrade when I do a disc conversion. Anyways, back on topic, the brakes are much better, and in fact I towed a 12k load today and it worked very, very well. Obviously the braking isn't actually improved as far as brake fade or anything, just the firm pedal is much more reassuring.
Here's what I did: I bought a 12" section of 1/2" threaded rod, and cut it into sections of different length. I bought a 1/2" fender washer that was the same outside diameter as the housing of the master cyl. Then, I bought a compression spring that fit the smaller opening in the pusher in the hydro. The rod actually threaded into the opening in the master cyl, then the washer fit over that, and the spring went over than, then I bolted it all together. All the parts were from Home depot, and the rod length I used was 3 3/4". All in all, it works perfect, except that I believe that my power steering pump is worn out, because the brakes are pretty firm. Not that it's bad, and not that that is my only clue, but I think I'm going to upgrade to the 450 pump in the future. Actually, I was curious what axles Ford ran under the 450's; I might wanna steal some axles if they're heavier. If not, I'm just do a master upgrade when I do a disc conversion. Anyways, back on topic, the brakes are much better, and in fact I towed a 12k load today and it worked very, very well. Obviously the braking isn't actually improved as far as brake fade or anything, just the firm pedal is much more reassuring.what is the 1/2' washer and spring used for?
Well I made a pushrod after I see a pic that came with the reman hydroboost unit
I just a 6" 3/8 bolt and cut it down to 4" then i took a bench grinder and ground rounded ends on it so that it fit into the dimple in hydro boost and the master cylinder I bought a 3" 11/16 compression spring and a 3/8 x 1 1/2" washer the washer was put against master cylinder then the spring and my homemade pushrod in the middle seems to work good the brake pedal returns when it's depressed my
Parts all came from o reilly and numbers are
Hydroboost 52 7079
Hose pss 71422
Hose pss 71416
Lowes sells A 3/8 brass t fitting
I just a 6" 3/8 bolt and cut it down to 4" then i took a bench grinder and ground rounded ends on it so that it fit into the dimple in hydro boost and the master cylinder I bought a 3" 11/16 compression spring and a 3/8 x 1 1/2" washer the washer was put against master cylinder then the spring and my homemade pushrod in the middle seems to work good the brake pedal returns when it's depressed my
Parts all came from o reilly and numbers are
Hydroboost 52 7079
Hose pss 71422
Hose pss 71416
Lowes sells A 3/8 brass t fitting











