Proportioning valve rebuild kit - The 1947 - Present Chevrolet & GMC Truck Message Board Network

rddaves54 · 03-22-2009, 07:27 PM

Is there a Proportioning valve rebuild kit or how can I check it to see if it is working. I have it off now. I have replaced everything on the brake system but this. 72 chevy c/10 front disk Chief mechanic for my 54Belair, 64Corvair, 72 C/10Fleetside and 2002Tahoe.

John 14:6 Jesus said, "I am the way, the truth, and the life. No one comes to the Father except through Me.

Husker · 03-22-2009, 08:22 PM

I have cleaned one before with I think mineral spirits.
Ron

rddaves54 · 03-24-2009, 06:52 AM

Is there anything to it? Do you just take it apart and clean it up or is there something to be careful about when taking it apart?

I ran rubbing alcohol and then brake fluid through it will that be good enough or does it have to be taken apart?

Green Machine · 03-24-2009, 10:51 AM

Don't use mineral spirits, it will ruin the rubber parts. We took 2 old ones apart to try to get one to work for our 71. Not much luck. Best to buy a new one, I know they are expensive, but when you need to use the brakes, that is not the time to find out you saved $80. It's bad when they don't go, but it's worse when they don't stop.

Sport/Truck · 03-28-2009, 09:04 PM

Quote:

Originally Posted by Green Machine

Don't use mineral spirits, it will ruin the rubber parts. We took 2 old ones apart to try to get one to work for our 71. Not much luck. Best to buy a new one, I know they are expensive, but when you need to use the brakes, that is not the time to find out you saved $80. It's bad when they don't go, but it's worse when they don't stop.

I went to NAPA and Autozone and they both said they don't sell them.
s/t

Green Machine · 03-28-2009, 09:27 PM

We got a new one from Classic parts of America. Guess they are more than I remembered.

http://www.classicparts.com/1971-72-...ctinfo/71-245/

Husker · 03-24-2009, 06:34 PM

I took the nut off the one end If I remember right I amy have use Sea Foam Cleaner in spray can or Mineral spirits. Mine did not work well until after I cleaned it out. My brakes in My truck are GREAT. I did all of this when I swapped to disc
Ron

blazer72 · 03-27-2009, 10:18 PM

I took mine all apart and cleaned it with bore brushes, pipe cleaners, and Q-tips - put it back together - never had another problem with my brakes

**americanmusc1e** · 03-28-2009, 09:28 PM

Quote:

Originally Posted by rddaves54

Is there a Proportioning valve rebuild kit or how can I check it to see if it is working. I have it off now. I have replaced everything on the brake system but this. 72 chevy c/10 front disk Chief mechanic for my 54Belair, 64Corvair, 72 C/10Fleetside and 2002Tahoe.

John 14:6 Jesus said, "I am the way, the truth, and the life. No one comes to the Father except through Me.

is your brake warning light on

stope4 · 03-29-2009, 12:50 AM

If you take it apart and it's clean inside, just clean it out with some brake cleaner. Take the old o'rings to a place that distributes o'rings in Columbia. Tell them what the service is for and get some new ones. Use a little brake fluid on the new o'rings, slip them on, put back together and you should be good to go. Make sure the warning light pin matches up with the groove in the valve. If not, your warning light will go on.

03-22-2009, 07:27 PM	#1
rddaves54 Registered User Join Date: Nov 2008 Location: Columbia SC Posts: 231	Proportioning valve rebuild kit Is there a Proportioning valve rebuild kit or how can I check it to see if it is working. I have it off now. I have replaced everything on the brake system but this. 72 chevy c/10 front disk Chief mechanic for my 54Belair, 64Corvair, 72 C/10Fleetside and 2002Tahoe. John 14:6 Jesus said, "I am the way, the truth, and the life. No one comes to the Father except through Me.

03-22-2009, 08:22 PM	#2
Husker Registered User Join Date: Dec 1999 Location: Mid NE USA Posts: 2,212	Re: Proportioning valve rebuild kit I have cleaned one before with I think mineral spirits. Ron __________________ Member #111 68 C-10 Daily Driver 70 4x4 Project 76 Jeep CJ-5 Help Support the Board: http://67-72chevytrucks.com/vboard/payments.php He who knows nothing is closer to the truth than he whose mind is filled with falsehoods and errors. Thomas Jefferson

03-24-2009, 06:52 AM	#3
rddaves54 Registered User Join Date: Nov 2008 Location: Columbia SC Posts: 231	Re: Proportioning valve rebuild kit Is there anything to it? Do you just take it apart and clean it up or is there something to be careful about when taking it apart? I ran rubbing alcohol and then brake fluid through it will that be good enough or does it have to be taken apart?

03-24-2009, 10:51 AM	#4
Green Machine Senior Member Join Date: Jul 2004 Location: Estherville, Iowa Posts: 3,371	Re: Proportioning valve rebuild kit Don't use mineral spirits, it will ruin the rubber parts. We took 2 old ones apart to try to get one to work for our 71. Not much luck. Best to buy a new one, I know they are expensive, but when you need to use the brakes, that is not the time to find out you saved $80. It's bad when they don't go, but it's worse when they don't stop. __________________ 1968 C10 307 3spd Long Fleet ------ http://67-72chevytrucks.com/vboard/s...d.php?t=201103 1970 C10 305 Super T10 Long Fleet --- http://67-72chevytrucks.com/vboard/s...d.php?t=202285 1971 C20 383 TH350 Dana Posi ----- http://67-72chevytrucks.com/vboard/s...d.php?t=206894 2001 GMC Sierra 1500 C3 6.0

03-28-2009, 09:27 PM	#6
Green Machine Senior Member Join Date: Jul 2004 Location: Estherville, Iowa Posts: 3,371	Re: Proportioning valve rebuild kit We got a new one from Classic parts of America. Guess they are more than I remembered. http://www.classicparts.com/1971-72-...ctinfo/71-245/ __________________ 1968 C10 307 3spd Long Fleet ------ http://67-72chevytrucks.com/vboard/s...d.php?t=201103 1970 C10 305 Super T10 Long Fleet --- http://67-72chevytrucks.com/vboard/s...d.php?t=202285 1971 C20 383 TH350 Dana Posi ----- http://67-72chevytrucks.com/vboard/s...d.php?t=206894 2001 GMC Sierra 1500 C3 6.0 Last edited by Green Machine; 03-28-2009 at 09:29 PM.

03-24-2009, 06:34 PM	#7
Husker Registered User Join Date: Dec 1999 Location: Mid NE USA Posts: 2,212	Re: Proportioning valve rebuild kit I took the nut off the one end If I remember right I amy have use Sea Foam Cleaner in spray can or Mineral spirits. Mine did not work well until after I cleaned it out. My brakes in My truck are GREAT. I did all of this when I swapped to disc Ron __________________ Member #111 68 C-10 Daily Driver 70 4x4 Project 76 Jeep CJ-5 Help Support the Board: http://67-72chevytrucks.com/vboard/payments.php He who knows nothing is closer to the truth than he whose mind is filled with falsehoods and errors. Thomas Jefferson

03-27-2009, 10:18 PM	#8
blazer72 Freedom isn't Free Join Date: Oct 2006 Location: OKC Posts: 393	Re: Proportioning valve rebuild kit I took mine all apart and cleaned it with bore brushes, pipe cleaners, and Q-tips - put it back together - never had another problem with my brakes

03-29-2009, 12:50 AM	#10
stope4 Registered User Join Date: Jan 2006 Location: Houston Posts: 434	Re: Proportioning valve rebuild kit If you take it apart and it's clean inside, just clean it out with some brake cleaner. Take the old o'rings to a place that distributes o'rings in Columbia. Tell them what the service is for and get some new ones. Use a little brake fluid on the new o'rings, slip them on, put back together and you should be good to go. Make sure the warning light pin matches up with the groove in the valve. If not, your warning light will go on.

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