Brake problem cant lock them up
Im having a brake problems on my 72
The first one I think I have fixed. The back brakes would loose fluid and I could not find any leaks. The PO had installed dual exhaust and the passenger side was riding tight on the brake line. I think that the fluid was just being boiled out. I have bent the brake line with about 1/ 2 clearance. The other problem is that I cant lock up my brakes. This is the one thats bothering me right now. I put in a new master/booster from Kragen as well at new cylinder in back and new pads all around. Anyone have any ideas why I cant lock up my brakes - front or back I need to pull a trailer and like to have the brakes 100% |
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Kragen Master Cylinder, im doing the same thing. Im on my second one in 3 days, could not a full stream of fluid to the rear. Bought a new one from CPP, still have the same problem. Did you bench bleed your MC?
Also I bought a vacuum bleeder from Harbor freight, other than my problem it bleed the front in seconds. |
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no I didnt bench bleed. really glad I didn't as the pipe connectors where different then the original I had to get adapters. I had the master cylinder for a few months with no problem ( fist time the rear reservoir has been empty )
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you have to beench bleed, dont worry Kragen will still take it back. Dry it off and take it back, thats what I will be doing tomorrow. In fact the first one I got was wet.
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what is bench bleeding? that where you put fluid in the master cylinder before you install it? it came with the booster
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Basically when you buy the mastercylinder you lock it in your vise. Have someone help you and what you do is fill it full of fluid and then put your fingers over the 2 outlets. Nowhave someone push the cylinder in and before they let it back out, cover the outlet holes so that it sucks fluid down. You will do this quite a few times and eventually when you press down on the plunger you will get no air just fluid out of the outlets.. They do sell bench bleed kits that make it easier and less messy... Do a quick google search and you will find a ton of articles to help you out. And just because you didnt bench bleed it doesnt mean its bad. It just takes that much longer to bleed the brakes. Just easier to take the MC out and bench bleed it, and reinstall and then bleed the brakes in the correct order. |
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why cant I do that when its installed in the truck... my dad and I have bleed brakes for years, and have had no problem removing the air from the system.
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And give the brakes 100 miles or so to break in fully and you should be able to lock them up. If you cant, then id figure you have a booster problem... |
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no ones ever said I was afraid of making a mess.
I'll keep any eye on the brakes. may re-bleed them later this week. Quote:
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clamp pin on combination valve to bleed brakes
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Sorry - I dont understand your post.
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Do you mean were the wire goes to the prop valve??? |
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get service manual read service manual step by step instructions on proper way to bleed brakes//AFTER ALL it is the difference between life and death to have a brake system working properly |
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Is there another valve that im missing somewhere??? |
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http://img.photobucket.com/albums/v6...d/DSC00457.jpg I thought they were called proportioning valves. Either way, your talking about that rubber disc located on the front right? Clamping that off isnt necessary it just makes it easier to bleed the rear brakes? |
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http://www.classicperform.com/Store/...uck/7172PV.htm And my technicians call them that. I just want to know if we are talking about the same thing is all? It might just be old school terms your "combination" valve. Never heard em called that. That is if we are talking about the same valve. lol. |
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chiltons motors haynes and GM service manuals all call them combination valves //reading service manuals is very old school |
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Also, just so you know for 1965-1969 brake bleeding procedure is RR, LR, RF, LF. Now if you have a 1970-1974 the bleed procedure is. LF, RF, LR, RR..... |
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That is old school. Now its all on the net.. ;) I can honestly say that i did NOT disable the metering valve like they say. My brakes bled fine and are rock solid. I also went with the old school way of doing the brake that is the furthest away first. From what it says in the vintage manual, in a 70-74 its completely different.... |
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LET US KNOW THOUGH. ahah |
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thanks - I didnt disable the little rubber covered pin. I'll re bleed the brakes this week and let you all know.
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Mine feel fine, but i didnt do what cdowns said. Im going to go back and redo them and use his method... I have a feeling they will feel even better... |
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