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| | |-+  67 68 Camaro manual drum brakes
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Author Topic: 67 68 Camaro manual drum brakes  (Read 58211 times)
JohnZ
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« Reply #30 on: November 25, 2007, 03:12:37 PM »

Good post - excellent photos!
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'69 Z/28
Fathom Green
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sebastien
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« Reply #31 on: November 26, 2007, 01:37:29 PM »

nice work Jeff,thanks for all the good info!
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Sebastien 68  327 rag top
rich69rs
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« Reply #32 on: December 02, 2007, 09:13:42 PM »

Following 7 posts are pages from Delco Drum Brake Service Manual; 17D-11; January 1971; Dealing with Master Cylinder Reconditioning.  Note reference to check valves only being part of the drum brake master cylinder on pp 4-26 (4th post in this series.)
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Richard Thomas
1969 RS
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« Reply #33 on: December 02, 2007, 09:14:46 PM »

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Richard Thomas
1969 RS
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« Reply #34 on: December 02, 2007, 09:20:00 PM »

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Richard Thomas
1969 RS
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« Reply #35 on: December 02, 2007, 09:20:30 PM »

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Richard Thomas
1969 RS
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« Reply #36 on: December 02, 2007, 09:21:00 PM »

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Richard Thomas
1969 RS
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« Reply #37 on: December 02, 2007, 09:21:27 PM »

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Richard Thomas
1969 RS
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« Reply #38 on: December 02, 2007, 09:22:01 PM »

Seventh Page
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Richard Thomas
1969 RS
sebastien
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« Reply #39 on: December 03, 2007, 02:13:12 PM »

thank you for sharing Rihard!
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Sebastien 68  327 rag top
Flowjoe
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« Reply #40 on: December 05, 2007, 06:36:40 PM »

So do power drum brakes receive the RPV?  How about the rears on a power disc brake set up?
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Steve68
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« Reply #41 on: December 05, 2007, 07:25:33 PM »

Question 1: Yes. Question 2: No.

Steve
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Flowjoe
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« Reply #42 on: December 05, 2007, 08:13:08 PM »

Question 1: Yes. Question 2: No.

Steve

That seems odd.  Given JohnZ's explanation of why the RPV is necessary it would seem that the rear drums on a Power front disc car would need them as well, escpecially since a power drum car needs them (which implies that the booster does not do the same job as an RPV).

I'm not saying your wrong, just clarifying the logic.
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Steve68
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« Reply #43 on: December 05, 2007, 08:31:31 PM »

I think I misunderstood your second question.  I thought you were indicating the rears were disk brakes.  If the front are disk and the rears are drum then the front outlet (to the disk brakes) does not have a check valve in the outlet and the rear outlet (to the drums) does have a check valve.  The check valves provide a residual 8-10 pounds of pressure on the line to hold the wheel cylinder internal cups against the wheel cylinder wall (to seal it around the cups perimeter).  Sorry if I misunderstood the question to start with and confused you.   Smiley

Steve
« Last Edit: December 05, 2007, 08:43:30 PM by Steve68 » Logged
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