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1961 - 1966 F-100 & Larger F-Series Trucks Discuss the Slick Sixties Ford Truck

Prop. Valve Question

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Old Jul 25, 2010 | 06:39 PM
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Prop. Valve Question

Can you guys tell me if this Prop. Valve will work with my '66 disk brake up front and drum in the rear??

Thanks

http://www.summitracing.com/parts/RSD-PV71/
 
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Old Jul 25, 2010 | 09:30 PM
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This is the one you will need..... Adjustable Proportioning Blocks With Brake Light Switch
it has two lines in and 3 lines out.
the one from summit has one line in and two lines out, not enough lines going in and out.
 
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Old Jul 25, 2010 | 10:26 PM
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Sweet.. Thanks a lot Bill.
 
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Old Aug 21, 2010 | 12:33 PM
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I finally got my Prop Valve. This one is a lot bigger then the stock one. Do any of you have photos or ideas of where to put the new one. There are 2 inlets and 3 outlets and one of the outlets is on the bottom of the valve so I can't mount it on the frame like it was before.

Any ideas? Thanks a lot.
 
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Old Aug 21, 2010 | 01:46 PM
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Leave it floating, the hard lines should hold it up just fine.
 
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Old Aug 21, 2010 | 04:30 PM
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The original's mount on the backside of the crossmember, drivers side, and is spaced off the frame about an inch or so.
 
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Old Aug 22, 2010 | 02:53 AM
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Originally Posted by Bill W
The original's mount on the backside of the crossmember, drivers side, and is spaced off the frame about an inch or so.
There was no 'Brake Differential Proportioning Valve' prior to 1967. Proportioning valves were introduced in 1967 in conjunction with dual master cylinders.

No F Series truck proportioning valve...that I'm aware of, was ever mounted on any crossmember.

1967/79: There were three mounting locations, depending on the application.

1) Below the master cylinder, "floating" above the steering gearbox.

2) On the left (drivers) side outer frame rail, inboard of the left front wheel.

3) On the left (drivers) side outer frame rail, inboard of the left front wheel...but further towards the rear...adjacent to the steering gearbox.
 
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Old Aug 22, 2010 | 09:16 AM
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I did NOT state what year!....If i had said 65-66 then you can use the little The 79 and the 72 i had, had them mounted in this location...i saw it with my own 2 eyes. back side of the crossmember, drivers side.
 
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Old Aug 22, 2010 | 01:09 PM
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Look in some junk yards there is a bracket that attaches to the steering box to accept the prop valve. Look in 70s cars trucks and vans.

Do not let it float as it will vibrate and cause fatigue at the connections leading to an eventual failure.

Garbz
 
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Old Aug 22, 2010 | 02:35 PM
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Do you mean here?
 
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Old Aug 22, 2010 | 04:03 PM
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OldHarley. is that 66 f100 red? because i have a 66 f250 camper special DSO and the paint looks to be roughly the same color. white on top and copper on bottom? im just curious no biggie
 
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Old Aug 22, 2010 | 04:17 PM
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Yes, it is 1966 color code JM Rangoon Red/Wimbledon White,

If yours is copper, there were a couple of copper shades available in '66. This chart may be slightly off from the actual color chips, though.

 
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Old Aug 22, 2010 | 05:51 PM
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none of those seem to look like mine. mine has non standard colors i beleive. i was just thinking maybe yours was the same. because i have seen the same color combo on a 67 pickup but i dont know if thats a standard color or another special color. thanks for posting back i appreciate it.
 
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Old Aug 23, 2010 | 05:22 AM
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Originally Posted by Bill W
I did NOT state what year!....If i had said 65-66 then you can use the little. The 79 and the 72 i had, had them mounted in this location...i saw it with my own 2 eyes. back side of the crossmember, drivers side.
Bill, since this is the 1961/66 forum, when you say original, what would someone who was not aware of when prop valves were first introduced, think that meant?

Back side of which crossmember-drivers side?

These trucks have "ladder frames." One right & one left frame rail and...at least 6 crossmembers.
 
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Old Aug 23, 2010 | 07:59 PM
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Engine Crossmember, Bill.
 
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