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Discussion Starter #1
So I just replaced the Master Cylinder, bench bled it fine, re-installed, used my Harbour Freight pnuematic power bleeder on the rear, no problems. Move to the front, and I can't get any fluid out of the lines! It has something to do with the proportional valve?, I tried to bleed it, but nothing. I am getting fluid to it, and that little pin under the rubber thing at the end of the valve is not moving, even when someone steps on the brake. I can force some fluid by pumping the pedal, but it just suck air back in the front bleeders when you let off. How do I move that proportional valve to bleed the front? Thanks!
 

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AKA: Butthead
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...that little pin under the rubber thing at the end of the valve is not moving,
even when someone steps on the brake. I can force some fluid by pumping
the pedal, but it just suck air back in the front bleeders when you let off.
How do I move that proportional valve to bleed the front?
In my '75 Ford Shop Manual it sez to hold that pin out on
my F150 but others you are supposed to hold that pin in.

You'll be able to figure out which direction your pin needs
to go with some pliers. ;)

Made a tool for mine like Ford shows in the shop manual...


Also get your money back on the "bleeding hunk of crap".

All you need is a small bottle with some brake fluid in it and
hose that fits the bleeder with the end of it down in the fluid
and then you pump away keeping an eye on the master's
reservoir fluid level. Easy as that.

It's a one man operation, danggit.

After you get your money back, I got this bridge for sale... ;)

Alvin in AZ
 

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Discussion Starter #4
In my '75 Ford Shop Manual it sez to hold that pin out on
my F150 but others you are supposed to hold that pin in.

You'll be able to figure out which direction your pin needs
to go with some pliers. ;)

Made a tool for mine like Ford shows in the shop manual...


Also get your money back on the "bleeding hunk of crap".

All you need is a small bottle with some brake fluid in it and
hose that fits the bleeder with the end of it down in the fluid
and then you pump away keeping an eye on the master's
reservoir fluid level. Easy as that.

It's a one man operation, danggit.

After you get your money back, I got this bridge for sale... ;)

Alvin in AZ
The pin is stuck, looks like I need to remove it to try to loosen the valve...also I chewed the end off trying to use pliers :doh0715: Hopefully I can unstick it by taking it off. The book says less than 6800 GVW pin out, so looks like out it is.

Also I like my bleeder, I've spent $24 on worse stuff, I'm very happy with it:thumbup
 

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Do it manually with the engine runnig. The power assist will make a big difference bleeding the front brakes. I have never pulled that pin to bleed the brakes.
 

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OMF
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Do it manually with the engine runnig. The power assist will make a big difference bleeding the front brakes. I have never pulled that pin to bleed the brakes.
THIS^^^^
 

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AKA: Butthead
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I have never pulled that pin to bleed the brakes.
Me neither! LOL :)

I tried it once after making the tool ~10 years and it made no difference.
There have been a few guys over the years that claimed their's needed
pushed in or pulled out or it wouldn't bleed tho, but not in my case.

And I don't "bench bleed" neither! All you gotta do is raise the rear of the
truck. Even in Kansas they got jacks and/or there's something a guy can
back the rear tires up on like a pile of dirt. ;)

Alvin in AZ
 

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AKA: Butthead
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The pin is stuck, looks like I need to remove it to try to loosen the valve...
also I chewed the end off trying to use pliers Hopefully I can unstick it by
taking it off. The book says less than 6800 GVW pin out, so looks like out
it is.
It doesn't move very dangged far, like 3/32" or even less?
Does yours move at all? It might be stuck-'n'-out already?

I should've mentioned in my post that since you could push
brake fluid past yours it prob'ly don't need messing with, it
was just your "bleeding;)crap" couldn't push fluid past it.

Never know when to go into details and when not to. :/
Most of the time seems like the OP doesn't even read my
long-windy-assed posts. LOL :)

Alvin in AZ
 

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Discussion Starter #10
It doesn't move very dangged far, like 3/32" or even less?
Does yours move at all? It might be stuck-'n'-out already?

I should've mentioned in my post that since you could push
brake fluid past yours it prob'ly don't need messing with, it
was just your "bleeding;)crap" couldn't push fluid past it.

Never know when to go into details and when not to. :/
Most of the time seems like the OP doesn't even read my
long-windy-assed posts. LOL :)

Alvin in AZ
Agreed, since I could manually pump past it, I'll take Rangers advice and have the GF pump while I dump :) I read your long winded assed posts :)
 

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Discussion Starter #11
Do it manually with the engine runnig. The power assist will make a big difference bleeding the front brakes. I have never pulled that pin to bleed the brakes.
Worked like a champ; it's amazing what a $30 master cylinder, and $6 worth of Brake fluid has done. The rusty water was solution was removed from the lines and thoroughly flushed. I then took 10 minutes and crawled around while the GF pumped. Brakes are 100% better even being completely stock. The manual pump worked perfect!! :rockon
 
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