Brake Question...
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Fleet Mechanic
Joined: Jun 2011
Posts: 1,804
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From: Southern California
Brake Question...
Its the usual, mushy/spongy brake pedal. They stop the truck but they feel like it would be hard to stop with a heavy load in the back. Its a 1974 f250 4X4 Regular Cab.
Now here is a 2nd question that relates to the first. The PO put a Dana 44 up front with discs replacing the old axle with drums. So the truck now has front discs and rear drums. Would this swapping of the front to discs have anything to do with the mushy brakes?
Is there any way to get rid of the mushy brakes and get it to stop quicker with less force on the pedal like with the newer trucks?
Any info will help. And yes the lines and all have been bleed and there are no air bubbles.
Now here is a 2nd question that relates to the first. The PO put a Dana 44 up front with discs replacing the old axle with drums. So the truck now has front discs and rear drums. Would this swapping of the front to discs have anything to do with the mushy brakes?
Is there any way to get rid of the mushy brakes and get it to stop quicker with less force on the pedal like with the newer trucks?
Any info will help. And yes the lines and all have been bleed and there are no air bubbles.
Posting Guru
Joined: Sep 2009
Posts: 1,159
Likes: 1
From: Suburbs of Chicago
The front disc swap could contribute if they didn't switch to a quick take up MC with a disc reservoir.
Another factor is the fact you're running 35" tires on there. More rotating mass takes longer to stop
Another factor is the fact you're running 35" tires on there. More rotating mass takes longer to stop
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Fleet Mechanic
Joined: Jun 2011
Posts: 1,804
Likes: 5
From: Southern California
Yea i thought about the whole 35" thing but it still seems like it should stop a whole lot sooner and i should have some more braking power
Whats a "quick take up MC with a disc reservoir"?
Post Fiend
Joined: Apr 2008
Posts: 8,261
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From: Big Sky Country
X2 on using the disc/drum MC
drum/drum setups use a distribution block, disc/drum setups require a proportioning valve
did the PO install a prop valve during the swap?
there's more to it then just swapping a drum brake axle for a disc brake axle.
drum/drum setups use a distribution block, disc/drum setups require a proportioning valve
did the PO install a prop valve during the swap?
there's more to it then just swapping a drum brake axle for a disc brake axle.
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Fleet Mechanic
Joined: Jun 2011
Posts: 1,804
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From: Southern California
Ok from what I was told it seems like he just threw the new axle on. Does anyone have part number for where I can look up and order the parts if need be?
Also what's hydro assist brakes? Heard it has something to do with power steering???
Also what's hydro assist brakes? Heard it has something to do with power steering???
New User
Joined: Aug 2012
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Since you mentioned proportioning valve, is there a special tool to push in the bleeder rod? Haynes manual says this needs to be done if the system has been opened up, like changing master cylinder. My pedal goes to the floor as well. Also where could a guy get on of these proportioning valves. This truck is 77 f250 supercab.
Posting Guru
Joined: Dec 2009
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From: Mississippi
Since you mentioned proportioning valve, is there a special tool to push in the bleeder rod? Haynes manual says this needs to be done if the system has been opened up, like changing master cylinder. My pedal goes to the floor as well. Also where could a guy get on of these proportioning valves. This truck is 77 f250 supercab.
Trending Topics
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Fleet Mechanic
Joined: Jun 2011
Posts: 1,804
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From: Southern California
Anyone used this? Also what would i need with it? (do i need a booster unit? as in round thing MC is connected to)
Hydraulic Brake Setup With Lineset
Master Cylinder For Hydroboost Disc/Drum
Hydraulic Brake Setup With Lineset
Master Cylinder For Hydroboost Disc/Drum
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