brake proportioning valve
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Tuned
Joined: Jan 2014
Posts: 340
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From: Weaverville NC
brake proportioning valve
I am wondering: I drive a '65 F-100. I have a '79 brake proportioning valve on it. I had that put on my truck 14 years ago. It was a used one. It went along with a reman'd booster.
What is the life time of a brake proportioning valve??? What symptoms start to show that it will need to be replaced? I don't want to run into some one and hurt them when an accident can be avoided. I see Summit offers several for sale.
Does anyone have any experience with this situation???
Thank you, Cheers, Pete
What is the life time of a brake proportioning valve??? What symptoms start to show that it will need to be replaced? I don't want to run into some one and hurt them when an accident can be avoided. I see Summit offers several for sale.
Does anyone have any experience with this situation???
Thank you, Cheers, Pete
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From: 7th realm of hell, Va.
I don't think they go bad, no moving parts. It is just a block with different size orifice's in it to vary the pressure between front and rear. If it were an aftermarket variable proportioning valve it might go bad, or if your brake fluid has a lot of moisture in it and you hae rust build up in it
matt
matt
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Tuned
Joined: Jan 2014
Posts: 340
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From: Weaverville NC
brake porp. valve
Hi Matt,
Thank you for your advice. Nice to know that I kin leave it there and know it is going to do its job for a long time as it is.
Best to you and all you love, Pete,
Thank you for your advice. Nice to know that I kin leave it there and know it is going to do its job for a long time as it is.
Best to you and all you love, Pete,
Posting Guru
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Actually, there ARE moving parts inside, thus the reason you need to power flush the system completely every so often, depending on how much you drive it and what the differential temps are in your area. All brake systems build up condensation within, even when just setting for weeks or months or years. When this happens, this water condensation mixes with the brake fluid and can easily rust the inside of the system, including the proportioning valve. To flush the system, you really need to take it to someone that has the right equipment to do the power flush job correctly. There is a process, especially when dealing with a proportioning valve.
If you maintain the entire system correctly, you may never see a proportioning valve falter. The 'low fluid sensor' on top may leak at some point and need attention, but in general, the valve lasts for a very long time.
On another note, most proportioning valves, 'match' the system they are applied to. If scrounging the parts yard for a brake system, make sure you scrounge the complete system, including booster (if being used), master and proportioning valve.
If you maintain the entire system correctly, you may never see a proportioning valve falter. The 'low fluid sensor' on top may leak at some point and need attention, but in general, the valve lasts for a very long time.
On another note, most proportioning valves, 'match' the system they are applied to. If scrounging the parts yard for a brake system, make sure you scrounge the complete system, including booster (if being used), master and proportioning valve.
Thread Starter
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Tuned
Joined: Jan 2014
Posts: 340
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From: Weaverville NC
Brake pressure differential valves
Mornin Bill,
Thanks for telling me when dual m.cyl. & b.p.diff. valves were first used.
I had the first booster/dual mast.cyl. put in my truck in the year 2,000. It was out of a '79 F-100. I am wondering; From 1979 to 2014 is 35 years, would I be wise to put a new b.press. diff. valve on my truck? I currently have drums all the way around. They are serving me well. Don't fell like putting disks on front. I suspect that the donor truck(the '79 F-100) had
disks on the front of it.
The local a.parts store don't offer the b. p. diff. valve. Would this be something the local Ford garage would be able to sell me? If so what year/model/ part # should I ask for???
Thank you, Pete,
Thanks for telling me when dual m.cyl. & b.p.diff. valves were first used.
I had the first booster/dual mast.cyl. put in my truck in the year 2,000. It was out of a '79 F-100. I am wondering; From 1979 to 2014 is 35 years, would I be wise to put a new b.press. diff. valve on my truck? I currently have drums all the way around. They are serving me well. Don't fell like putting disks on front. I suspect that the donor truck(the '79 F-100) had
disks on the front of it.
The local a.parts store don't offer the b. p. diff. valve. Would this be something the local Ford garage would be able to sell me? If so what year/model/ part # should I ask for???
Thank you, Pete,
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 785
From: Simi Valley, CA
Thanks for telling me when dual m.cyl. & b.p.diff. valves were first used.
I had the first booster/dual mast.cyl. put in my truck in the year 2,000. It was out of a '79 F-100.
I am wondering; From 1979 to 2014 is 35 years, would I be wise to put a new b.press. diff. valve on my truck? No.
I currently have drums all the way around. They are serving me well. Don't fell like putting disks on front. The donor truck ('79 F-100) came with disks on the front of it.
The local a.parts store don't offer the b. p. diff. valve. Would this be something the local Ford garage would be able to sell me? No, it's obsolete.
I had the first booster/dual mast.cyl. put in my truck in the year 2,000. It was out of a '79 F-100.
I am wondering; From 1979 to 2014 is 35 years, would I be wise to put a new b.press. diff. valve on my truck? No.
I currently have drums all the way around. They are serving me well. Don't fell like putting disks on front. The donor truck ('79 F-100) came with disks on the front of it.
The local a.parts store don't offer the b. p. diff. valve. Would this be something the local Ford garage would be able to sell me? No, it's obsolete.
D5TZ-2B257-B .. Brake Pressure Differential Valve / Marked: D5TA-2B524-FA or FB / Obsolete ~ No Ford dealer or obsolete parts vendor has any.
Applications: 1975/79 F100/150 2WD/4WD / 1975/79 F250 2WD with single piston caliper disc brakes / 1975/79 E100/150 / 1976/79 F250 4WD / 1978/79 Bronco / 1979 F350 4WD
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Thread Starter
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Tuned
Joined: Jan 2014
Posts: 340
Likes: 21
From: Weaverville NC
brake porp. valve
Hi Bill,
Thanks for looking up the part #. I was just trying to keep my truck at the 100% performance level. Are there any symptoms to warn me that this valve is starting to fail?
I want to prevent a wreck from happening, if I can.
Thanks, Pete
Thanks for looking up the part #. I was just trying to keep my truck at the 100% performance level. Are there any symptoms to warn me that this valve is starting to fail?
I want to prevent a wreck from happening, if I can.
Thanks, Pete
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Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 785
From: Simi Valley, CA
1967/79's came with a low brake fluid warning lamp on the dash. The switch that activates it...threads into the valve. So the valve you have has the switch.
But, since 1966 and earlier vehicles don't have the valve, there's no low brake fluid warning lamp.
But the plastic switch is a well known POS, cracks develop within its threads, causing brake fluid to seep out.
So, you might take a look at it...to see if it's leaking.
C8AZ-2B264-A .. Low Brake Fluid Warning Lamp Switch / Available from Ford/auto parts stores.
Applications: 1968/69 FoMoCo Passenger Cars / 1968/79 F100/350, Bronco & Econoline.
Thread Starter
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Tuned
Joined: Jan 2014
Posts: 340
Likes: 21
From: Weaverville NC
brake prop. valve.
Hi Bill,
Thank you SOOOOO much for telling me about the plastic switch on the brake prop valve. I will look at it closely first chance I get. Nice to know more about this valve.
Thanks for the part # too for the switch., Pete
Thank you SOOOOO much for telling me about the plastic switch on the brake prop valve. I will look at it closely first chance I get. Nice to know more about this valve.
Thanks for the part # too for the switch.
, Pete
Thread Starter
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Tuned
Joined: Jan 2014
Posts: 340
Likes: 21
From: Weaverville NC
brake porp valve
Hi Bill, I furr-got to ask you what the abbreviation POS means. You used that like this; ...plastic sw. is a well known POS.
Thanks for telling me what the 3 letters mean,Cheers, Pete
Thanks for telling me what the 3 letters mean,Cheers, Pete
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 785
From: Simi Valley, CA
POS = Piece Of S**t! aka a troublesome turd since day one!
Thread Starter
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Tuned
Joined: Jan 2014
Posts: 340
Likes: 21
From: Weaverville NC
brake prop. valve
Howdy Bill,
You are exactly right. The bpv has a switch in it. The wires were cut off by the shop that put the bpv & booster/mast.cyl in my truck in 2,000. They musta cut the wires at the sw. because there is no light on my dash. You really know., ty, Pete
You are exactly right. The bpv has a switch in it. The wires were cut off by the shop that put the bpv & booster/mast.cyl in my truck in 2,000. They musta cut the wires at the sw. because there is no light on my dash. You really know.
, ty, Pete
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