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 Post subject: I need help (brakes)
PostPosted: Sun May 12, 2013 5:43 am 
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Hey guys I have a 76 luv with power brakes... Over the winter I tubbed the truck out so it now has wildwood 4 piston calipers out back still stock disc up front... I installed new front calipers at the same time. Went to bleed brakes and noticed master was leaking into booster so I bought a new master and sent the booster to cardone for a rebuild. I put the truck together bled the breaks which have a nice stream coming out... The pedal goes all the way to the floor and just stops the truck. Any ideas what it could be?


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 Post subject: Re: I need help (brakes)
PostPosted: Sun May 12, 2013 10:14 am 
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Location: Whittier, (So). Cal.
A bad "new " master maybe? Did you try bleeding at the master? Sometimes air can be trapped in the master.
I wonder if the proportioning valve would be causing this now that you have disk in the rear instead of drums?

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 Post subject: Re: I need help (brakes)
PostPosted: Sun May 12, 2013 10:29 am 
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I bled the master on bench before install I'm wondering if there is still air in it


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 Post subject: Re: I need help (brakes)
PostPosted: Sun May 12, 2013 12:19 pm 
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Location: Camarillo, CA
Do you have a pressure check valve for the rear brakes?

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 Post subject: Re: I need help (brakes)
PostPosted: Sun May 12, 2013 12:40 pm 
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Just a 3/16 line from master back to hose then tees off to 2 3/16 lines to each caliper the caliper are 4 piston


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 Post subject: Re: I need help (brakes)
PostPosted: Sun May 12, 2013 2:12 pm 
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Location: Pelahatchie, MS
Do you still have the stock proportioning valve on it?

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 Post subject: Re: I need help (brakes)
PostPosted: Sun May 12, 2013 2:14 pm 
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There's not prop valve on this there never was the rear brake go into front of master and the front brakes go off of the rear of master it has a factory tee built into the rear fitting on the master


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 Post subject: Re: I need help (brakes)
PostPosted: Sun May 12, 2013 2:18 pm 
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So it was always drum/drum?

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 Post subject: Re: I need help (brakes)
PostPosted: Sun May 12, 2013 3:03 pm 
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Disc drum since I've owned it there stock disc up front


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 Post subject: Re: I need help (brakes)
PostPosted: Sun May 12, 2013 3:39 pm 
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It will have a factory proportioning valve then. Look for a block where the line tie together, I ain't done stock in a while, so I can't point it out...

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 Post subject: Re: I need help (brakes)
PostPosted: Sun May 12, 2013 4:05 pm 
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This ain't my first rodeo lol there is no prop valve on this system.... Line goes from front of master all the way back to rear... Front lines go from tee on master to each wheel that's all


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 Post subject: Re: I need help (brakes)
PostPosted: Sun May 12, 2013 5:03 pm 
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Location: Spokane,Wa.
Yep,looks like the set-up on my 76 with automatic tranny......


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 Post subject: Re: I need help (brakes)
PostPosted: Sun May 12, 2013 5:33 pm 
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SOLOWSONOMA wrote:
This ain't my first rodeo lol there is no prop valve on this system.... Line goes from front of master all the way back to rear... Front lines go from tee on master to each wheel that's all


Good luck...

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 Post subject: Re: I need help (brakes)
PostPosted: Sun May 12, 2013 5:51 pm 
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Yea that's it... Do I need a prop valve? Is that setup made for 4 wheel drum ?


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 Post subject: Re: I need help (brakes)
PostPosted: Sun May 12, 2013 5:55 pm 
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SOLOWSONOMA wrote:
Yea that's it... Do I need a prop valve? Is that setup made for 4 wheel drum ?


Look, I tried to help. You can run drum/discs only 2 ways. Since it ain't your first rodeo, you figure it out Genius...

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 Post subject: Re: I need help (brakes)
PostPosted: Sun May 12, 2013 6:02 pm 
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It was a joke man... I'm here asking for help... I thought these masters had built in prop valve since they don't I guess I have to hunt down a prop valve


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 Post subject: Re: I need help (brakes)
PostPosted: Sun May 12, 2013 6:09 pm 
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Location: Camarillo, CA
Here is a 78 set up.

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 Post subject: Re: I need help (brakes)
PostPosted: Sun May 12, 2013 6:13 pm 
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Ok, I will start over. If it does not have an exteral proportioning valve, the master will either be sized for the different volume, or it will have one internal. So, if you have discs/drums factory, you either need to remove the valve, if it is external, or get a different master cylinder that does not have one...

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 Post subject: Re: I need help (brakes)
PostPosted: Sun May 12, 2013 6:24 pm 
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Hmmm anyone know what master I could switch to I just bought this master n had booster redone I'd hate to scrap em both


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 Post subject: Re: I need help (brakes)
PostPosted: Sun May 12, 2013 7:10 pm 
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When I owned Bens old truck it had 4 wheel disc, see if Ben chimes in or the current owner of the truck. I thought it was a stock master and booster.

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