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#1 |
Senior Member
![]() Join Date: Mar 2011
Location: Hanover NJ
Posts: 4,164
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help with rear brake issue 72 cheyenne
well i thought i had a booster issue because my brakes did not perform as good as my stepside with no booster. so i replaced that when i separated the master cylinder i saw some fluid come out the back i replaced the MC i tried to bleed the rear brakes by pumping and holding down nothing but some drips coming out ...i thought i would gravity bleed the rears nothing but drops. i took the line off the back of the valve(red circle )and open one rear bleeder at a time and got the fluid to squirt out both sides one at a time when i put air to it... so to me no kinks or flattened line either side or any where ....i bought a new proportioning valve still can't get rears to bleed ...i took that line(red circle) off the back of the new valve for the rear brakes pushed the peddle down no fluid comes out the back of the new valve. fronts bleed fine ....took it out for a ride and stomped on the peddle a few times no change ...im not getting any fluid thru the valve to the rear brakes????? I believe my rear brakes have not been engaging at all since i started driving it a few months ago.... so I'm a dummy
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Doc & Kim build http://67-72chevytrucks.com/vboard/s...d.php?t=722288 I am from the desert http://67-72chevytrucks.com/vboard/s...d.php?t=650332 basket case build SOLD http://67-72chevytrucks.com/vboard/s...d.php?t=648557 |
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#2 |
Moderator
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Location: Southern Cal
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Re: help with rear brake issue 72 cheyenne
Whenever I bleed a brake system on any vehicle I use a hand vacuum pump at every corner. A Mityvac, or a cheap harbor freight knock off works. I have never had an issue doing it this way.
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1972 C/10 Cheyenne Super SWB. Restored, loaded, slammed. 1968 C/10 50th Anniversary LWB. Unrestored, stock, daily driver/work truck. RIP ElJay RIP 67ChevyRedneck RIP Grumpy Old Man |
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#3 |
Registered User
Join Date: Mar 2009
Location: WARRENSBURG,MISSOURI,64093
Posts: 1,518
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try topping off your master cylinder and crack open the bleeders at each rear wheel and let them "Gravity" Bleed. takes a while, but the fluid will flow out slowly and push the air along with it, you have to keep an eye on the master cylinder so it doesn't run dry, or you'll be bleeding a lot longer..... those speed bleeders might also be of some assistance as well.
Have a good one! Ben ![]() |
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#4 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,622
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Re: help with rear brake issue 72 cheyenne
You need to push in and hold in place the button in the front of the prop valve. It's under that black rubber cap.
Then your rear brakes will bleed. |
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#5 |
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Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
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Re: help with rear brake issue 72 cheyenne
I AM TRUELY AMAZAED AT THE NUMBER OF PEOPLE THAT DONT HAVE A SERVICE MANUAL TO READ THE PROPER WAY TO BLEED BRAKES and cant figure it out
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71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY |
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#6 |
Registered User
Join Date: Jan 2011
Location: Chattanooga, TN
Posts: 2,151
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Re: help with rear brake issue 72 cheyenne
Is the rubber line at the rear original? Could be it is internally collapsed and not allowing fluid to pass. (edit)Never mind-re-read and you are having trouble up front.
I found one once (on a front) with a nail in it. PO had a leak apparently and just stuck a nail in it so no fluid would pass. Scary!
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'83 K20-TPI '73 C10 '79 C10-ex-diesel(SOLD) '07 Tahoe(Son driving) '14 Suburban-DD '71 C10-current project |
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#7 |
Senior Member
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Location: Hanover NJ
Posts: 4,164
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Re: help with rear brake issue 72 cheyenne
Thanks much ....I'm gonna give that a try
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#8 | |
Senior Member
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Location: Hanover NJ
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Re: help with rear brake issue 72 cheyenne
Quote:
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#9 |
Senior Member
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Location: Hanover NJ
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Re: help with rear brake issue 72 cheyenne
Will do again as a last resort I think and hope geezer99 is on to something if that fails I'm in on a vac pump thanks
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Doc & Kim build http://67-72chevytrucks.com/vboard/s...d.php?t=722288 I am from the desert http://67-72chevytrucks.com/vboard/s...d.php?t=650332 basket case build SOLD http://67-72chevytrucks.com/vboard/s...d.php?t=648557 |
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#10 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,622
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Re: help with rear brake issue 72 cheyenne
Fails!!
Never!! LOL!! Just remember, keep it held in. You can make an 'L' Bracket and bolt it to the prop valve or rig up a big set of channel locks to hold it in. |
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#11 | |
Senior Member
![]() Join Date: Mar 2011
Location: Hanover NJ
Posts: 4,164
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Re: help with rear brake issue 72 cheyenne
Quote:
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Doc & Kim build http://67-72chevytrucks.com/vboard/s...d.php?t=722288 I am from the desert http://67-72chevytrucks.com/vboard/s...d.php?t=650332 basket case build SOLD http://67-72chevytrucks.com/vboard/s...d.php?t=648557 |
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#12 |
Registered User
Join Date: Dec 2013
Location: Gold Canyon, AZ
Posts: 36
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Re: help with rear brake issue 72 cheyenne
Is your dash brake light on. If the valve is tripped you should have a light. I believe ccp and others makes an inexpensive tool, less than ten bucks, that screws in in place of the switch and holds the valve centered during bleeding. Good luck.
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#13 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,622
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Re: help with rear brake issue 72 cheyenne
Go gentle on that button.
It only needs to go in about 1/8 inch. |
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#14 |
Senior Member
![]() Join Date: Mar 2011
Location: Hanover NJ
Posts: 4,164
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Re: help with rear brake issue 72 cheyenne
thanks I'm gonna look for that tool
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Doc & Kim build http://67-72chevytrucks.com/vboard/s...d.php?t=722288 I am from the desert http://67-72chevytrucks.com/vboard/s...d.php?t=650332 basket case build SOLD http://67-72chevytrucks.com/vboard/s...d.php?t=648557 |
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#15 |
Senior Member
![]() Join Date: Mar 2011
Location: Hanover NJ
Posts: 4,164
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Re: help with rear brake issue 72 cheyenne
thanks thats good to know too..... ill rig up something
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Doc & Kim build http://67-72chevytrucks.com/vboard/s...d.php?t=722288 I am from the desert http://67-72chevytrucks.com/vboard/s...d.php?t=650332 basket case build SOLD http://67-72chevytrucks.com/vboard/s...d.php?t=648557 Last edited by zicc1835; 08-28-2015 at 10:42 PM. Reason: more |
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#16 |
Senior Member
![]() Join Date: Mar 2011
Location: Hanover NJ
Posts: 4,164
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Re: help with rear brake issue 72 cheyenne
thanks to Geezer got them bled, made my own tool welded a screw to the C clamp ...LOL crude but it worked cut down on the helpers needed
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Doc & Kim build http://67-72chevytrucks.com/vboard/s...d.php?t=722288 I am from the desert http://67-72chevytrucks.com/vboard/s...d.php?t=650332 basket case build SOLD http://67-72chevytrucks.com/vboard/s...d.php?t=648557 |
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#17 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,622
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Re: help with rear brake issue 72 cheyenne
Congrats!!
Nothin' like a little 'McGyverin'!! |
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#18 |
Senior Member
![]() Join Date: Mar 2011
Location: Hanover NJ
Posts: 4,164
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Re: help with rear brake issue 72 cheyenne
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Doc & Kim build http://67-72chevytrucks.com/vboard/s...d.php?t=722288 I am from the desert http://67-72chevytrucks.com/vboard/s...d.php?t=650332 basket case build SOLD http://67-72chevytrucks.com/vboard/s...d.php?t=648557 |
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