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06-21-2018, 07:35 PM
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#1 |
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Registered User
Join Date: Apr 2018
Location: NW, Oregon
Posts: 51
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Brake fluid through new lines
I replaced the front brake line from the proportioning valve to where it connects to the rear brake line near the passenger wheel. Now I can't get fluid to the back no matter what I have tried.
If I disconnect the line from the proportioning valve I get a slow drip and a stream when I step on the brake. Hook that line back up and I can't seem to get fluid to go anywhere. I've tried standard bleeding along with using a Mighty Vac and can't seem to get any fluid moving. Any ideas? |
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06-21-2018, 07:41 PM
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#2 |
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Registered User
Join Date: Jun 2013
Location: Somewhere
Posts: 3,052
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Re: Brake fluid through new lines
You need to recenter the valve in the block people like to call a prop valve. Before bleeding you're supposed to bolt an angled piece of metal to the block to keep it centered.
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06-21-2018, 08:03 PM
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#3 |
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Senior Member
 
Join Date: Jan 2016
Location: Sugar Hill GA
Posts: 368
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Re: Brake fluid through new lines
Franken is right. I just went through this. Try pushing a few times on that rubber button on the front of the "prop valve". I used a Motive Power Bleeder to push fluid to the back, works awesome.
__________________
1967 C10 Step side 1970 AMX 390 1977 Datsun 280Z highly modified with '95 LT1 power |
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06-21-2018, 09:16 PM
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#4 |
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Registered User
Join Date: Apr 2018
Location: NW, Oregon
Posts: 51
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Re: Brake fluid through new lines
I used a test light and it did not come on. I thought that meant the valve was centered.
I did try the stomping pedal method and had no change. Rears locked up until I replaced the line. It is a used master/valve that I pulled from another truck when I did a disk swap. |
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06-21-2018, 09:18 PM
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#5 |
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Registered User
Join Date: Apr 2018
Location: NW, Oregon
Posts: 51
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Re: Brake fluid through new lines
Also, I hooked my mighty vac to the valve and sucked fluid out easily.
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06-22-2018, 06:03 AM
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#6 |
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Special Order
  
Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,863
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Re: Brake fluid through new lines
Brake hose collapsing?
__________________
"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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06-22-2018, 08:29 AM
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#7 |
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Registered User
Join Date: Feb 2012
Location: Vinton, Va.
Posts: 473
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Re: Brake fluid through new lines
Yeah that rubber brake hose at the rear end could've collapsed. That is what happened to me when I recently put on a new master cyl./booster for disc brakes. You can't tell by looking at it either. It messes up inside the hose. Was a PITA cuzz the brake lines and the tee were rusted and wouldn't brake loose. Had to replace brake line all the way to that tee by pass side wheel well. Did the trick though, just one of those things!!!!
__________________
"You are not forgotten" USMC 75-79 (Aviation Ordnance Tech- F-4 Phantom) 1959 H-D Panhead. Owned since 1978. Currently with son in Lawton, OK. 1968 Chevy Custom SWB pick up. Fleetside. Lowered 4/6. Totally refurbished. 1966 Pontiac GTO. 4 speed. Saved original 389. Now has slightly built 455 engine. 355 rear gears. Very fun to drive ! |
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06-22-2018, 10:24 AM
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#8 | |
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Registered User
Join Date: Apr 2018
Location: NW, Oregon
Posts: 51
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Re: Brake fluid through new lines
Quote:
Does not look like fun getting that connection apart but I don't have any other ideas at this point. |
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06-22-2018, 11:16 AM
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#9 |
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Special Order
Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,863
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Re: Brake fluid through new lines
Sounded like classic brake hose collapsing to me soon as I read your first post. You can get that junction block from Inline Tube. If it wrings off on the axle side, Inline does a beautiful job on the line from block to wheel cylinders on the axle... something you can see from behind stock trucks.
__________________
"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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06-22-2018, 02:18 PM
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#10 |
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Registered User
Join Date: Apr 2018
Location: NW, Oregon
Posts: 51
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Re: Brake fluid through new lines
I was able to get the hose loose. Should probably buy a lottery ticket that nothing broke.
That thing is all blocked up. Couldn't even get compressor air to go through it. Nobody has one it stock so hopefully I'll have it all back together tomorrow. |
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06-23-2018, 09:16 PM
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#11 |
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Registered User
Join Date: Apr 2018
Location: NW, Oregon
Posts: 51
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Re: Brake fluid through new lines
New hose, brakes work great now.
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06-23-2018, 10:05 PM
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#12 |
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Registered User
Join Date: Feb 2012
Location: Vinton, Va.
Posts: 473
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Re: Brake fluid through new lines
Great glad its working ! You got lucky it didn t turn out to be a bigger job.
__________________
"You are not forgotten" USMC 75-79 (Aviation Ordnance Tech- F-4 Phantom) 1959 H-D Panhead. Owned since 1978. Currently with son in Lawton, OK. 1968 Chevy Custom SWB pick up. Fleetside. Lowered 4/6. Totally refurbished. 1966 Pontiac GTO. 4 speed. Saved original 389. Now has slightly built 455 engine. 355 rear gears. Very fun to drive ! |
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