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08-07-2020, 09:25 PM
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#1 |
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Registered User
Join Date: Jul 2015
Location: Smithton, Mo.
Posts: 158
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69 k20 brake issues
My 69 k20 with manual brakes is giving me fits. I've replaced all wheel cylinders, one front brake hose(passengerside), and bench bled the master cylinder. I don't have fluid at the drivers side wheel. Only brake that works is passenger side front. I've got decent fluid at the rears, but still no good brakes. The drivers front has me baffled as to why I have no flow of fluid. Pedal has a lot of free play, too.Maybe plugged hose?? Any suggestions are welcome.
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08-08-2020, 01:56 AM
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#2 |
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Post Whore
 
Join Date: Feb 2016
Location: Portland Oregon
Posts: 10,796
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Re: 69 k20 brake issues
I would crack the hard line at top of the driver's side hose. If you have fluid the hose is bad.
Have you inspected the bore on the master cylinder? What made you decide to replace the wheel cylinders and the one hose? How did you adjust the shoes after replacing the wheel cylinders.
__________________
Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help.  RIP Bob Parks. 1967 Burban the WMB,1991 S(stink)-10 Blazer,1969 GTO, 1970 Javelin, 1952 F2 Ford 4X4, 29 Model A, 72 Firebird. 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377 |
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08-08-2020, 06:28 AM
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#3 |
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Proprietor of Dale's Corner
Join Date: Nov 2012
Location: Vacaville , CA
Posts: 15,834
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Re: 69 k20 brake issues
I'm voting on a collapsed hose
__________________
"Some Days Chickens And Some Days Feathers" Dale XNGH ECV Sam Brannan 1004 R.I.P. 67ChevyRedneck R.I.P. Grumpy Old Man |
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08-08-2020, 08:28 AM
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#4 | |
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Registered User
Join Date: Jul 2015
Location: Smithton, Mo.
Posts: 158
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Re: 69 k20 brake issues
Quote:
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08-08-2020, 05:16 PM
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#5 |
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Registered User
Join Date: Jul 2015
Location: Smithton, Mo.
Posts: 158
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Re: 69 k20 brake issues
Looks like the drivers brake hose on the front is swelled shut. Can't blow through it or get even the smallest wire to go through. Ordered one from my local NAPA and it will be here Monday. Hopefully that's the last part on this "simple" brake job!
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08-08-2020, 08:07 PM
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#6 |
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Who Changed This?
Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,086
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Re: 69 k20 brake issues
Good news, in that the problem is now found. Did you replace the rear brake hose yet? Now would be the time if you haven't, since they are all probably the same age.
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~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
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08-10-2020, 10:58 AM
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#7 |
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Registered User
Join Date: Jul 2019
Location: New Boston, NH
Posts: 456
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Re: 69 k20 brake issues
I listened to the advice I received from this awesome board when I had a bad brake hose. I replaced all three rubber hoses and my master and now my brakes are great.
I would replace all the rubber brake hoses and I would flush out all the lines too.
__________________
1968 C-20 CST Vermillion http://imageevent.com/happy_dan/dantoys/68c20 2019 Silverado 2012 Camaro ZL1 |
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08-11-2020, 07:51 PM
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#8 |
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Registered User
Join Date: Jul 2015
Location: Smithton, Mo.
Posts: 158
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Re: 69 k20 brake issues
Looks like I've got brakes, finally! As per some recommendations I replaced the final 2 brake hoses and that fixed it. Now just waiting on my radiator to return from the repair shop and this truck will be on the road for the first time in 30 years.
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