Hydroboost parts needed
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From: Gravel Switch, KY
Hydroboost parts needed
I am trying to put hydroboost brakes on my 93 F350. I bought a hydroboost unit today but it says you have to reuse the old rod and spring from the old hydroboost unit. The problem is I don't have an old unit. I called Ford and they do not show it as being available, or at least not seperately. Anybody know where I can get my hands on one? I could make one if I had one to go by or if I had some dimensions and spring size/strength.
DannyP
DannyP
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From: Gravel Switch, KY
I had to return the hydroboost unit to the parts store, I can't use it. I called a Bendix distributor and he said the rod and spring are not even showing in his book. If you don't have that rod and spring, you ain't got nothing. I ordered a complete, used, hydroboost and master cylinder assembly from a junkyard. It cost me almost as much as much as the rebuilt unit from the parts store and I got no warranty but like I said, if you ain't got that rod and spring, it ain't gonna work. Maybe I need to disassemble the unit when it arrives and take some measurements of these parts so I can fabricate and sell them. I can't be the only person to run into this problem.
DannyP
DannyP
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From: Southwestern Pa.
DannyP,
Harold at the power brake X-change inc. (800)580-5729 Rebuilders of anything steering and brake related. Distributors formost major brand names and ABS. Everytime I've been there there is a also a truck from one dealership or another.
Good luck and let us know how it goes.
Harold at the power brake X-change inc. (800)580-5729 Rebuilders of anything steering and brake related. Distributors formost major brand names and ABS. Everytime I've been there there is a also a truck from one dealership or another.
Good luck and let us know how it goes.
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From: Gravel Switch, KY
Well the junkyard hydroboost unit didn't pan out either. They contacted me and said it had a leak. At least they were honest and didn't knowingly send me a defective unit. Back to square one. I am putting this project on the back burner for awhile, there's more pressing matters to attend to. I'll still continue to look for a good unit, and maybe give Power Brake Exchange a call just to see what he's got to say on the matter.
DannyP
DannyP
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From: Spokane, WA
Hey Dan,
Do you ever check ebay? I got a unit identical to this one for $110: Auction #7965631736 This one is at $140, complete with MC. Might be something to keep in mind, they pop up from time to time. I haven't had a chance to get mine in the truck yet, hoping to have it done soon though.
Do you ever check ebay? I got a unit identical to this one for $110: Auction #7965631736 This one is at $140, complete with MC. Might be something to keep in mind, they pop up from time to time. I haven't had a chance to get mine in the truck yet, hoping to have it done soon though.
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From: Gravel Switch, KY
Originally Posted by ivanribic
Hey Dan,
Do you ever check ebay? I got a unit identical to this one for $110: Auction #7965631736 This one is at $140, complete with MC. Might be something to keep in mind, they pop up from time to time. I haven't had a chance to get mine in the truck yet, hoping to have it done soon though.
Do you ever check ebay? I got a unit identical to this one for $110: Auction #7965631736 This one is at $140, complete with MC. Might be something to keep in mind, they pop up from time to time. I haven't had a chance to get mine in the truck yet, hoping to have it done soon though.
DannyP
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From: Spokane, WA
Not sure of the bore size. I do remember that it's larger than the Chevy MC's which is why I went with a Ford hydroboost instead of a unit out of a Suburban. I dismanteled my junk last weekend and found that I'll need to do a fair amount of modification to make the hydrobooster work on my 78 but it shouldn't be too tough.
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From: Gilbert, Arizona
Sorry to bring this post up again, but I'm having the exact same dilemma while trying to convert to hydroboost this weekend. The remanufactured hydroboost unit didn't come with the rod and spring. If the parts aren't available, I might be returning it and looking for one from a junkyard.
Another problem: The pedal pushrod on the hydroboost is a lot shorter than the one on my vacuum booster (about 1.5" shorter). So if I hook up the brake pedal, the pedal is way too low. Am I missing something? Is there any way to swap the pedal push rod from the old vacuum booster? Do I have to swap brake pedal assemblies or something?
Thanks in advance,
Scott
Another problem: The pedal pushrod on the hydroboost is a lot shorter than the one on my vacuum booster (about 1.5" shorter). So if I hook up the brake pedal, the pedal is way too low. Am I missing something? Is there any way to swap the pedal push rod from the old vacuum booster? Do I have to swap brake pedal assemblies or something?
Thanks in advance,
Scott
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From: Gravel Switch, KY
Originally Posted by Mr Man
I'm having the exact same dilemma while trying to convert to hydroboost this weekend. The remanufactured hydroboost unit didn't come with the rod and spring. If the parts aren't available, I might be returning it and looking for one from a junkyard.
Another problem: The pedal pushrod on the hydroboost is a lot shorter than the one on my vacuum booster (about 1.5" shorter). So if I hook up the brake pedal, the pedal is way too low. Am I missing something? Is there any way to swap the pedal push rod from the old vacuum booster? Do I have to swap brake pedal assemblies or something?
Thanks in advance,
Scott
Another problem: The pedal pushrod on the hydroboost is a lot shorter than the one on my vacuum booster (about 1.5" shorter). So if I hook up the brake pedal, the pedal is way too low. Am I missing something? Is there any way to swap the pedal push rod from the old vacuum booster? Do I have to swap brake pedal assemblies or something?
Thanks in advance,
Scott
What year is your truck and what year truck is the hydro off of? Mine was a direct bolt-on except for elongating the m/c mounting holes. Mine works great. Much better pedal feel and emergency stops are not scary now. The accumulator on mine is evidently out of gas as their is no assist when the engine isn't running. According to the manual it defaults to manual brakes at this time but it is still easier to stop than it was with the vac booster under the same conditions. I am very pleased with the swap.
DannyP
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From: Gilbert, Arizona
Thanks for the reply DannyP. The hydroboost unit is supposed to be for an '89, and I'm putting it in an '87 which should be the same. After looking at the hydroboost unit, it looks like the pedal rod is just completely depressed. I can't pull it back out by hand, so I'm hoping that everything will return to normal once I've hooked up the hoses and filled it with fluid. I don't really want to force anything and cause damage. If not, I guess I'll be making another trip back to the parts store. It was a special order item, so there isn't another hydroboost at the store to compare it with.
Anyway, thanks for the tip about Power Brake Exchange. I'll be giving them a call tomorrow.
Scott
Anyway, thanks for the tip about Power Brake Exchange. I'll be giving them a call tomorrow.
Scott
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From: Gravel Switch, KY
Being depressed could very well be your problem. 
Yes, the 89 should work on the 87.
The spring and retainer you are missing serves to push the inner workings of the hydroboost back toward the pedal.
Good Luck!
DannyP
Yes, the 89 should work on the 87.
The spring and retainer you are missing serves to push the inner workings of the hydroboost back toward the pedal.
Good Luck!
DannyP
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From: Gilbert, Arizona
I am getting so frustrated with a project that should have taken a day to complete...
I'm about ready to give up finding the right hose adapter fittings. My hydroboost unit does not have inverted flare fittings... it has O-ring fittings. I cannot find any AN6 to O-ring adapters anywhere!! (Except metric sizes, but mine are not metric.) I have checked Earl's, Russell, Aeroquip, Speedway, etc. Did you guys have this same problem??
I inquired at the parts store to exchange my O-ringed hydroboost with an older inverted-flare unit. All I got was a blank stare from the parts guy.
Also, I got the master cylinder pushrod from Power Brake Exchange. It seems too long, 'cuz right now my brakes will not release. I'm using a stock F250 master cylinder with the bolt holes hogged out to fit the hydroboost unit. Anyone else run into this problem???
Any help would be greatly appreciated!!!
Scott
I'm about ready to give up finding the right hose adapter fittings. My hydroboost unit does not have inverted flare fittings... it has O-ring fittings. I cannot find any AN6 to O-ring adapters anywhere!! (Except metric sizes, but mine are not metric.) I have checked Earl's, Russell, Aeroquip, Speedway, etc. Did you guys have this same problem??
I inquired at the parts store to exchange my O-ringed hydroboost with an older inverted-flare unit. All I got was a blank stare from the parts guy.
Also, I got the master cylinder pushrod from Power Brake Exchange. It seems too long, 'cuz right now my brakes will not release. I'm using a stock F250 master cylinder with the bolt holes hogged out to fit the hydroboost unit. Anyone else run into this problem???
Any help would be greatly appreciated!!!
Scott
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From: Gravel Switch, KY
I don't understand why you are having trouble with hose fittings. If the hydro you are using is off of an 89 you should just be able to order the pump-to-hydro and hydro-to-steering gear lines for that year and be good to go. Maybe your hydro isn't off of an 89? I had to use compression fittings to splice my lines together since I have a Cummins engine with the Saginaw pump. Not sure what to tell you about the rod. Measure to see how much rod you have sticking out the back of the old vac booster and compare that with the hydro. Make sure the piston in the hydro is all the way back toward the pedal end when measuring.
DannyP
DannyP
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From: Texas
For future reference. If you can find any hydro boost unit from any ford truck, including the new super duties. They all have the spring retainer, the spring, and the rod. just pull the spring and retainer and rod from a wrecked truck.
Also, the reason the new units you buy are compressed is because they are pressurized when they leave the factory. When you pull the little rubber cap off it releases the pressure. I think it is done so if the unit leaks, youll see fluid all over the unit before installation.
Old thread, but hopefully this info will help someone in the future.
Also, the reason the new units you buy are compressed is because they are pressurized when they leave the factory. When you pull the little rubber cap off it releases the pressure. I think it is done so if the unit leaks, youll see fluid all over the unit before installation.
Old thread, but hopefully this info will help someone in the future.