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Who has done the disc brake conversion on their 14 bolt

I have disc/disc in my crew cab D60 front 14B rear, running 3/4 ton calipers/rotors on my 14b with Diy4x brackets. My rear brakes do lock before my fronts. I swapped in this disc/disc proportioning valve: It doesn’t have the residual pressure valve like the stock ones do for the rear drum circuit, bolts right into the stock location.
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I’m running the stock master cyl right now, it will easily lock up all 4 of my 37’s. My hydoboost booster just started leaking power steering fluid so I am replacing it along with a brand new P30 disc/disc hydro boost master (the same one @Truckman4life posted) and I have an adjustable proportioning valve to put in when I swap it over.

My brakes work great, I miss the parking brake all the time. My truck is a manual trans and I haven’t gotten around to figuring that out yet. I keep a couple of short 4x4 post sections in the bed for the times I have to park it on an incline.

Did they supply the grade 8 bolts too? :pimp:
 
@LNielson put in a ball valve for you rear brakes I have one it works great. Bought it from ORD then had new lines built so I could just put in the same place as a old school trailer brake I had.

My brakes work fine too. Stock MC, stock front Dana 60 HP brakes they are dual piston, rear - front 3/4 ton calipers and pads mid 80's Chevy or so.

park brake.jpg

park brake2.jpg

patk brake1.jpg
 
@LNielson put in a ball valve for you rear brakes I have one it works great. Bought it from ORD then had new lines built so I could just put in the same place as a old school trailer brake I had.

My brakes work fine too. Stock MC, stock front Dana 60 HP brakes they are dual piston, rear - front 3/4 ton calipers and pads mid 80's Chevy or so.

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That looks like a good setup. So it looks like you just made a big loop in the rear circuit coming right off the master through that ball valve, am I seeing that right? What did you use for those flex hoses?
 
That looks like a good setup. So it looks like you just made a big loop in the rear circuit coming right off the master through that ball valve, am I seeing that right? What did you use for those flex hoses?

I did just that, had the hoses built at Evco
 
Well that's depressing...... why would anybody want to go to the trouble of converting to disc if it was not a better set up? Why would anyone go to the trouble of making all the bracketry up.......

Ive caked mine with mud so many times...


I have disc/disc in my crew cab D60 front 14B rear, running 3/4 ton calipers/rotors on my 14b with Diy4x brackets. My rear brakes do lock before my fronts. I swapped in this disc/disc proportioning valve: It doesn’t have the residual pressure valve like the stock ones do for the rear drum circuit, bolts right into the stock location.
View attachment 290634 View attachment 290635

I’m running the stock master cyl right now, it will easily lock up all 4 of my 37’s. My hydoboost booster just started leaking power steering fluid so I am replacing it along with a brand new P30 disc/disc hydro boost master (the same one @Truckman4life posted) and I have an adjustable proportioning valve to put in when I swap it over.

My brakes work great, I miss the parking brake all the time. My truck is a manual trans and I haven’t gotten around to figuring that out yet. I keep a couple of short 4x4 post sections in the bed for the times I have to park it on an incline.

So these valves ( im clueless and been searching for hrs)... for disc/drum send different pressure to front and rear...disc/disc like this true it up? Maybe thats what i need.

After swamping my truck i ran into many issues. Replaced calipers/rotors..turns out my issue was front brake lines. No more death trap darting right towards a pole now.

Today i was testing my brakes...back locked and felt like front had nothing. Long story short i replaced brass washers on calipers to hoses ( yes i used new ones from calipers). Now the truck stops again. Like it used too.. can loxk the back and feel the front pull but low squishy pedal and has been on my list to look at.

I thought of putting the adjustable piece in the front line to make more pressure. Is that a good thing to do or best to replace portioning valve? Ive got everything stock to a 78 k20 camper special that had ď44-disc/14bff-drum and now d60-disc / 14bff-caddy calipers
 
The 79-85 Cadillac,which is disc front and rear, has a proportioning valve that looks
just like the what we have in our trucks. It has all the same line sizes and in the same place.
I would guess that the 78 and under would have the same, being disc front and rear. If it works
for Cadillac from the factory, should work. It is what I am using.
 
The 79-85 Cadillac,which is disc front and rear, has a proportioning valve that looks
just like the what we have in our trucks. It has all the same line sizes and in the same place.
I would guess that the 78 and under would have the same, being disc front and rear. If it works
for Cadillac from the factory, should work. It is what I am using.

Im using 76 caddy calipers. Caddy used thick rotors from 76-78 then went to thin style in 79...if memory serves me right
 
That be correct. I have the later as It was Warn gave me brackets for on my full float.
Used the thin and 1989 K1500 truck front rotor.
 
That be correct. I have the later as It was Warn gave me brackets for on my full float.
Used the thin and 1989 K1500 truck front rotor.

And i bought azz-kickin kit which is gone now.. love the kit and love the disc swap. Pads are cheap so im gonna change pads and learned how to set the wbrake... but want to get this done first.
 
@RootBreaker this is a very good video on how to adjust the park brake,
which is how the main disc pads are adjusted. You to have use
the parking brake to keep the pads adjusted. Also you if your brackets
are like most, you will have to unbolt calipers to bleed them.
 
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@RootBreaker this is a very good video on how to adjust the park brake,
which is how the main disc pads are adjusted. You have to have use
the parking brake to keep the pads adjusted. Also you if your brackets
are like most, you will have to unbolt calipers to bleed them.

Yup thats the one. Simple theory.. hand tighten... remove lever and see if it can catch a new angle. If so your good.

Fyi i gotta mount my cables lol..ummm its bad


See it? Lol

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The biggest problem is not using the parking brake as it is
what keeps it in adjustment and working right. The other is
getting the air out of caliper if it is not straight up on bleeding.
I have a spare set of spring and brackets for the later model.
I don't know if they will fit the earlier or not. When I replaced my
calipers at O'reileys the new set came with all the hardware attached.
 
I'm not sure where the residual valve lives. There is a valve inline above the rear differential mounted to the chassis with linkage connected to the differential. I always assumed it was a load dependent proportioning valve.

you want to remove this valve, esp if you have lifted your truck, or at minimum adjust it so that it seem the truck has load.

I am curious what is the spacing of the inboard pad, these kits have brackets that may or may not center the caliper. the lateral run out of the rotor pushes the inboard pad in and then sides the caliper to the out side to release the tension once the pedal is released. If the caliper is not centered well the inboard pad may need to travel farther = lower pedal. P30 mc disc disc RPO JB8 is a good mc, these move a lot of fluid. I haven't done rear disc conversion, only fronts. I will be doing a Ford 9 inch on my Brothers 55 Chevy wide window in the near future, should be interesting as he want to keep the booster and MC under the cab. Iirc we will be starting with a Wilwood kit. I am sure there will be trial an error.
 

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