which MC for drum brakes and hydro boost

[Bronco73]

I'm looking to install the hydro boost with drum brakes. I understand the pulling issues that may arise and so on. My brakes are in great shape and I do plan to install a D44 with disk brakes but I wont have time to do that until after I graduate this summer.

With that said I need to find an MC that will mount to the 98 F250 HB that I can use with drum brakes.

I know there was a post with a pdf file or something that listed the spec on a few MC's but I can not find it now and I did not save it when i first saw it. Not sure if that file will help or not but I've searched for it and an searched for which MC I may need with no luck.

Out of interest I looked up a 1970 mustang power drum brake MC and its pretty cheap to buy but i have no way of knowing if it will work or not.

My 71 MC has the rod attached to it so i can't use it or I don't think I can.
I was going to remove the lock ring and remove the bushing that appears to hold the MC rod in there but a little fluid came out when I started to remove it so I just stopped there and put it back together. Not sure if that's an option or not but I'm thinking it isn't.

 

[Hozr]

Standard Bronco MC should work fine. Hydroboost just adds power assist!

 

[Rustytruck]

Something to think about.
The Hydrabooster uses a floating rod between the booster and the master cylinder. If one was to cut the origional mastercylinder rod to the correct length replacing the floating booster rod. The fact that the rod is attached to the master cylinder shouldnt matter right? The trick would be getting the right length cut. Something to think about.

 

[Bronco73]

Hozr, the stock manul drum/drum MC has a 6 inch brake rod hanging off the back of the MC. Unless I can remove it with out cutting it then it will not simple bolt up. Adding power to the braking system isn't the issue. Its matching the correct parts and I'm trying to find a simple solution that will allow it to stay as close to a bolt on application as possible.

Cutting the stock rod is an option but one I was hoping to avoid. I'm trying to keep things in place so if my rebuild of the hydro boost didn't work out so well I can simple bolt all the stock stuff back and still be able to drive the bronco. Plus as I mentioned above I would like to make it as close to a bolt mod as possible.

I may go ahead and look at seeing if the brake rod can simple be removed. I'm also wondering if any broncos came with power drum/drum brakes? If so then it should have the correct MC to bolt to the hydro boost.

 

[TOFIC]

I'm looking to install the hydro boost with drum brakes. I understand the pulling issues that may arise and so on. My brakes are in great shape and I do plan to install a D44 with disk brakes but I wont have time to do that until after I graduate this summer.

With that said I need to find an MC that will mount to the 98 F250 HB that I can use with drum brakes.

I know there was a post with a pdf file or something that listed the spec on a few MC's but I can not find it now and I did not save it when i first saw it. Not sure if that file will help or not but I've searched for it and an searched for which MC I may need with no luck.

Out of interest I looked up a 1970 mustang power drum brake MC and its pretty cheap to buy but i have no way of knowing if it will work or not.

My 71 MC has the rod attached to it so i can't use it or I don't think I can.
I was going to remove the lock ring and remove the bushing that appears to hold the MC rod in there but a little fluid came out when I started to remove it so I just stopped there and put it back together. Not sure if that's an option or not but I'm thinking it isn't.

Well my two cents worth

if your doing drum/drum brakes use the MC on the Bronco, you need the residual pressure valves in the MC for the brakes to work correctly
new MC for your bronco are a dime a dozen, they are pickup masters so look for a pickup same year as your bronco or buy one (should be cheap)
I noticed you have a 98 HB from a HD f250, I would look for a old one tone two wheel drive truck and get that MC
seventies vans are the same too.
as to rod length (intermediate) it is not a bad job to do, (cut and splice) so dont be afraid of that.
if it is a seventies ford vehicle and all drums the master should work, mine is off a mercury marquis wagon so you should be able to find a good one

 

[Hozr]

The stock MC is the correct part as TOFIC reiterated. Nothing will be a "Bolt Up" solution once you start adding newer parts.

If you were Disc/Drum there are plenty of bolt on options. If you end up using a GM MC be aware they changed the push rod length somewhere near the late 70s early 80's that will necessitate modifying as well.

 

[Bronco73]

The brake pedal rod has been cut and spliced. I don't need to cut and splice the Rod from the HB to the MC. I need to remove it completely.

Yes I can tear down the HB and remove the internal HB MC rod and then cut the stock bronco rod to fit. I prefer to leave that stock HB MC rod in there and make the changes to the stock MC.

I will just have to order a new MC and hope it comes with the rod disconnected from the MC.

In this photo you can see the HB rod sticking out of the end on the unit. Next to oit on the left is the stock MC and if you look the MC rod is attached to the MC and I am not sure I can remove it with tearing up the MC or the aluminum piece it is attached to.

My hope was there is or was an MC that would work for drum brakes and not have the rod attached to it. Hence my hope a new one will come with it detached. Not sure if a power brake four wheel drum MC will work or not? I don't know of any power brake MC units that have the rod attached to the MC itself. The rod usually comes from the brake booster in a power brake application.

I will update as I move forward. I will order a new MC and see what happens. There are no yards near me to go pick for anything this old.

 

[dubulup]

Updates?

 

[DirtDonk]

Bronco power master cylinder will not have a rod, but you may not want the ports on the passenger side.
Some manual masters will have the rod in the box for you to install yourself.
Your existing master/rod assembly can be disassembled. Most likely you will not be able to snap it back into place permanently though, as the little clip is often a one-time use kind of thing.

In the form of a shameless plug, I'll describe the one we sell.
It's not going to be anywhere near the price of a junkyard part or an Autozone stock replacement, but the WH Heavy-Duty master #3079 ( http://www.wildhorses4x4.com/product/Hydroboost_Master_Cylinder ) should work for just about anything you need it for.

It's set up like this:
1 1/8" bore.
Standard ports on both sides (includes two plugs for the unused ones)
Mounting holes are slotted to fit multiple mounting flange sizes. Works on most hydroboost and vacuum boosters.
Equal size reservoirs for use with 4-wheel disc setups just as easily as it can work with drums.
Comes with piston "extension" for use with power setups. Remove it for manual rods.

The bore size makes it just a bit big to be perfect for manual brakes, but it's still useable that way in the beginning. Then when you upgrade to power assist it's perfect.
The ports on both sides allow you to use it straight or on angled brackets and plumbed the way you want. The size of the ports are all the same (3/16 pipe I think it is?) and sized for most standard aftermarket hoses.
The slotted holes allow some leeway in what you mount it to.
The little "bullet" shaped extension gives you a little more leeway with the different pushrod lengths of different mounts.

That's about it I guess. Probably more, but just highlighting that there are some possible advantages to this type when you're working with one system now and changing it later.
With this, I'm betting you could use it with just about any layout you could normally want.

Paul

 

[Bronco73]

I have been to busy with school exams and now finals to worry about the EB. Plus I'm in the hospital right now with my first kidney stone that is infected and had one small procedure done the other day. I'm not out of the water yet with this. The stone is still there. Not a very fun experience at all.

Getting off track,sorry. Hospital room is driving me nuts. I hope to get back on this after May 4th. That's my last final of the semester.

 

[ransil]

I have been to busy with school exams and now finals to worry about the EB. Plus I'm in the hospital right now with my first kidney stone that is infected and had one small procedure done the other day. I'm not out of the water yet with this. The stone is still there. Not a very fun experience at all.

Getting off track,sorry. Hospital room is driving me nuts. I hope to get back on this after May 4th. That's my last final of the semester.

I cant imagine what a large infected one feel like, I had one last year that sent me to the ER and it pretty much dissolved or passed without too much drama

 

[Pipehitter]

I have the same setup, drum brakes and a hydroboost. I have all new brake hardware on all four corners and do not have any pulling. However, it stops on a dime to the point that I will probably install an adjustable flow control for the rear brakes. I think I used an Astro van HB as was recommended on this site. Pic for reference of my HB

 

[bronconut73]

I have been to busy with school exams and now finals to worry about the EB. Plus I'm in the hospital right now with my first kidney stone that is infected and had one small procedure done the other day. I'm not out of the water yet with this. The stone is still there. Not a very fun experience at all.

Getting off track,sorry. Hospital room is driving me nuts. I hope to get back on this after May 4th. That's my last final of the semester.

Get better, get those finals done, and get back on that eb.

 

[dubulup]

Getting off track,sorry. Hospital room is driving me nuts. I hope to get back on this after May 4th.

sorry to hear that, as I type I'm in a hospital room waiting for surgery (driving me nuts)... Here's irony for you, I was installing the emergency flasher switch in my Volkswagen when I brushed past a tiller that fell off the wall (dad hung it up a couple days ago) and the blade went through my foot breaking my second toe. Called 911 with the emergency switch in my hand; been here since 11am waiting in pain.

I hope to install hydro boost on my drum/drum 74 soon.

 

[Bronco73]

sorry to hear that, as I type I'm in a hospital room waiting for surgery (driving me nuts)... Here's irony for you, I was installing the emergency flasher switch in my Volkswagen when I brushed past a tiller that fell off the wall (dad hung it up a couple days ago) and the blade went through my foot breaking my second toe. Called 911 with the emergency switch in my hand; been here since 11am waiting in pain.

I hope to install hydro boost on my drum/drum 74 soon.

Things can change in a split second. Hope your toe is feeling better.

I just caught a cold and was in my clinical rotation and asked if I could go home because I did not feel well. I was having trouble peeing all day but thought I was just sick. By the time I started driving the bronco home my right side hurt so bad I could barely press the clutch. Walked in the front door and told the wife something is wrong. She jumped up and said were going right back to the hospital that I had had just left. My clinical rotation just happens to be at the same hospital the wife works at.

By the time I got to see the doc I was in tears and shaking so bad I could not sit down nor stand up. After some pain med I was able to settle down. Some say it is worse than giving birth and all I can say is it is very painful.

They sent me to radiology to try and place a tube in my kidney and were unsuccessful. The next day I had a stent placed near the kidney. They could not remove the stone yet for fear of the infection bursting out and spreading. So I have been loaded with antibiotics and maybe be back in surgery next Wednesday to have the stent and the stone if it doesn't pass removed.

Just praying my kidneys are ok. My creatinine levels were slightly elevated but it may be just from the stone right now.

 

[dubulup]

I'm on 3 types of antibodtics due to the jagged rusty blade slicing through my second toe's first segment bone; pretty much treated as a compound fracture.

I hope things turn around for you soon, I should be discharged sometime today...one step at a time, lets get better; good luck with finals, I sure don't miss those days.