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#21
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Hey Sam, thanks so much for the kind words!! Believe it or not I don't have a "manual" for the car!! The only question I have is how hard do you have to push to get that plunger to move?? It looks to be stuck and I'm pretty sure that's why the front calipers aren't receiving any fluid?? From what I'm hearing here and elsewhere, you just push the plunger and bleed the fronts. Sounds like it doesn't take much effort to push it??
Sam, "Recommend depressing the plunger on the pressure metering valve when bleeding the front brakes." Absolutely.....this is a must. Dan And..... Learned long ago about depressing the plunger on the valve. I had a ‘69 Pace Car that “taught” me.
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I ain't as good as I once was, but I'm as good once as I ever was. |
The Following User Says Thank You to '69Novajoe For This Useful Post: | ||
Xplantdad (04-02-2020) |
#22
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Been a while since i did the bleeding but I remember it was firm and I think I used a clamp to depress it and free my hands up to do the bleeding at each front wheel. I would put something (piece of wood) between your clamp and the plunger so as not to harm it.
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Sam... |
#23
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Hey Joe, I reached out to Tom, WilmasL78boy, and he should check in soon.
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Sam... |
#24
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Bleeding the front brakes...
69 Chassis Service Manual states this regarding bleeding front disc brakes:
"The spring loaded end of the pressure metering valve must be depressed while bleeding. This can be done by depressing and holding the plunger in the end of the valve either by hand, or by clamping. This is all on page 5-29....there is additional information on pages 5-3 thru 5-5 If the plunger won't move, it may be stuck due to age/corrosion...I would check it and service as needed. I double checked the 70 manual as well...same instructions. Good luck. _wilma **you just reminded me I have to look at the front brakes on the 70 4 spd...I had a collapsed hose and changed both of them...pedal is still a little soft...
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02 Berger 380hp #95 Lots of L78 Novas Join National Nostalgic Nova! 70 Orange Cooler 69 Camaro Last edited by WILMASBOYL78; 04-02-2020 at 08:25 PM. Reason: more info |
#25
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Take care, be well and thanks again for all your help everyone!!
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I ain't as good as I once was, but I'm as good once as I ever was. |
#26
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Does this help at all ? I would like to understand how pushing on ,(DEPRESSING ) the exposed piston rod moves anything when the valve seal is already seated ?
Joe , your valve is most likely OK. They are easy to take apart, just used the correct socket. Most I have restored I cleaned and re used the seals. |
The Following User Says Thank You to m22mike For This Useful Post: | ||
Z15 SS 454 (04-03-2020) |
#27
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I ain't as good as I once was, but I'm as good once as I ever was. |
#28
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IMO, pushing on the shaft only increases the pressure on the piston seal, that is under spring pressure and seated and holding off flow. As the brakes are applied the rear brakes see pressure first, as pressure increases to about 40psi it overcomes the spring pressure in the ROUND HOLD OFF VALVE. Fluid flows into the line at the big nut , passed the piston seal, out the side fitting to the distribution valve, to the front brakes. Sometime watch the shaft move out as the brakes are applied by a helper.
If you wanted free flow through this valve it seems to me one would pull and hold the shaft open to unseat the piston seal. Open to learning more if this sounds incorrect to others. Mike |
#29
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I ain't as good as I once was, but I'm as good once as I ever was. |
#30
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I have no comment on the directions in the service manual Joe.
Sorry I don't have any more I can tell you. Maybe those that have had succes depressing the shaft during bleeding can explain what is happening in the valve. Mike |
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