Brakes pulling to one side - The 1947 - Present Chevrolet & GMC Truck Message Board Network

rodman91 · 02-21-2010, 10:57 PM

I am sure that this has been covered but really cant find what i am looking for so any info will help.
Replaced caliper, pads, rotor, and still will almost put you in a ditch. What be the deal? Prop valve? MC? or brake lines. It is not sticking, when you put the brakes on the drivers side front disc will grab harder and pull you into the other lane. I have done what i know.

hayhauler71 · 02-21-2010, 10:58 PM

Brake hose

chipflyer · 02-21-2010, 11:04 PM

I agree with rodman, the brake hose is more than likely plugged shut on the passenger side. Very common problem, the old rubber breaks down and swells shut.

Jeff

71swb4x4 · 02-21-2010, 11:02 PM

Sounds like you are getting very little pressure to one side. I would check the brake hoses and lines on the side that isn't grabbing.
My guess is either a blocked line; or maybe even a flexible line with a bubble in it, when you hit the brakes the fluid expands the line and doesn't make it to the piston. I would lean towards the blocked line. Did you notice any problem getting fluid when you were bleeding that side?

**lolife99** · 02-21-2010, 11:04 PM

The brake hoses collapse internally. (You won't be able to see it)
Ususally the side that pulls is gettin ALL the fluid, and the opposite side is collapsed.
I'd replace BOTH hoses.

EDIT:
I type too slow,...

**mr48chev** · 02-22-2010, 12:34 AM

I'd agree on the hoses. Along with that I would be checking the steel line to the right front wheel to make sure that it had not gotten smashed or twisted somewhere. Check every inch of it for damage.

And yes, replace both hoses when you do it.

70Custom10Nut · 02-22-2010, 09:31 AM

Hoses. Just replace them both (go back a few weeks ago and you'll see I was in your very same shoes). They're cheap and readily available at any of your local parts stores. Cnut

p_rubottom · 02-22-2010, 11:44 AM

I've had this happen to a friend of mine. If its not the hoses its the prop valve. From what he was told theres a difference in drum and disk brake valves. His was yanking him around pretty good too, swapped the valves and it evened out. Good luck.

chas350 · 02-22-2010, 11:46 AM

Agreed, front brake hoses!

chipflyer · 02-22-2010, 01:23 PM

Quote:

If its not the hoses its the prop valve. From what he was told theres a difference in drum and disk brake valves. His was yanking him around pretty good too, swapped the valves and it evened out. Good luck.

Not very likely to be the proportioning valve or the pre 71 distribution block.They both route brake fluid to either the front or back, not left side or right.

mrein3 · 02-22-2010, 02:32 PM

Quote:

Originally Posted by rodman91

I am sure that this has been covered but really cant find what i am looking for so any info will help.
Replaced caliper, pads, rotor, and still will almost put you in a ditch. What be the deal? Prop valve? MC? or brake lines. It is not sticking, when you put the brakes on the drivers side front disc will grab harder and pull you into the other lane. I have done what i know.

Before you start throwing parts at it, try this:
When you truck is pulling to the left (driver's side), safely pull over to the side of the road. Then VERY carefully, see how hot the wheel and hub on the RHS of the truck is. What can happen is if your right side brake is hung up it will get hot and fade. Then when you step on the brakes, that side doesn't grab and you pull the other way.
If the RHS is hot, start with a new caliper and set of pads on that side.

02-21-2010, 10:57 PM	#1
rodman91 Registered User Join Date: May 2009 Location: Fort Worth TX Posts: 59	Brakes pulling to one side I am sure that this has been covered but really cant find what i am looking for so any info will help. Replaced caliper, pads, rotor, and still will almost put you in a ditch. What be the deal? Prop valve? MC? or brake lines. It is not sticking, when you put the brakes on the drivers side front disc will grab harder and pull you into the other lane. I have done what i know.

02-21-2010, 10:58 PM	#2
hayhauler71 Registered User Join Date: Aug 2009 Location: St. Paul MN. Posts: 1,996	Re: Breaks pulling to one side Brake hose

02-21-2010, 11:04 PM	#3
chipflyer Registered User Join Date: May 2004 Location: Topeka, Ks Posts: 2,293	Re: Breaks pulling to one side I agree with rodman, the brake hose is more than likely plugged shut on the passenger side. Very common problem, the old rubber breaks down and swells shut. Jeff __________________ I'm not a pessimist, I'm just optimistic that bad things are going to happen. 1971 Cheyenne Super K10 - tilt, cruise, air, am/fm, tow hooks, factory buckets! 1986 Jeep J10 pickup, - 5.3L Vortec with 4L60e and NP241.

02-21-2010, 11:02 PM	#4
71swb4x4 Senior Member Join Date: Nov 2003 Location: Brookings, SD Posts: 10,497	Re: Breaks pulling to one side Sounds like you are getting very little pressure to one side. I would check the brake hoses and lines on the side that isn't grabbing. My guess is either a blocked line; or maybe even a flexible line with a bubble in it, when you hit the brakes the fluid expands the line and doesn't make it to the piston. I would lean towards the blocked line. Did you notice any problem getting fluid when you were bleeding that side? __________________ Some people are like slinkies, they aren't good for anything, but you can't help but smile when you see one tumble down the stairs.

02-21-2010, 11:04 PM	#5
lolife99 67-72 parts collector,… Join Date: Nov 2002 Location: Mid-MO Posts: 22,699	Re: Breaks pulling to one side The brake hoses collapse internally. (You won't be able to see it) Ususally the side that pulls is gettin ALL the fluid, and the opposite side is collapsed. I'd replace BOTH hoses. EDIT: I type too slow,... __________________ Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823 Last edited by lolife99; 02-21-2010 at 11:06 PM.

02-22-2010, 12:34 AM	#6
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 15,632	Re: Breaks pulling to one side I'd agree on the hoses. Along with that I would be checking the steel line to the right front wheel to make sure that it had not gotten smashed or twisted somewhere. Check every inch of it for damage. And yes, replace both hoses when you do it. Last edited by mr48chev; 02-22-2010 at 12:34 AM.

02-22-2010, 09:31 AM	#7
70Custom10Nut Registered User Join Date: Sep 2007 Location: Vilseck Germany (currently) Posts: 317	Re: Breaks pulling to one side Hoses. Just replace them both (go back a few weeks ago and you'll see I was in your very same shoes). They're cheap and readily available at any of your local parts stores. Cnut

02-22-2010, 11:44 AM	#8
p_rubottom Registered User Join Date: Aug 2007 Location: Kansas Posts: 366	Re: Breaks pulling to one side I've had this happen to a friend of mine. If its not the hoses its the prop valve. From what he was told theres a difference in drum and disk brake valves. His was yanking him around pretty good too, swapped the valves and it evened out. Good luck.

02-22-2010, 11:46 AM	#9
chas350 Registered User Join Date: Mar 2007 Location: Connecticut Posts: 581	Re: Breaks pulling to one side Agreed, front brake hoses! __________________ "I'll Procrastinate Tomorrow" quote by LEEVON 71 K10 long fleet (sons truck) new 370hp 355, sm465 np205, 3.73's 33's 70 K20 long fleet 98 G3500 work van



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