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  #1 (permalink)  
Old 09-21-2006, 09:34 PM
Rob Keller's Avatar
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Duel Mode,Height Sensing,Proportioning Valve

1985 CHEVY SUBURBAN 3/4 TON
10.5 ring gear 14 Bolt Full Floater rear with dual proportion valves.

I need a know how to check of this is defective.

I also need to know what it looks like inside{ a explosion view.

This is the correct term for this year make & model

Thanks to POWERRODSMIKEY & his VAST book collection
{I'm not telling you which room he keeps them in}

ANY & ALL INFORMATION ON THIS SUBJECT IS GREATLY APPRECIATED






R
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Old 09-21-2006, 10:07 PM
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Why don't you just undo that circlip.
It'll go back together.

I'll bet when you collect all the pieces that fall out you will find there is a pointy thing and a round thing or 2 and a spring.

You know it says that if the shaft spins freely the valve is defective.

Look at line 7 on the page with bleeding instructions.
From my book in the "reading room"

Later, mikey
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Old 09-22-2006, 03:02 AM
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Quote:
Originally Posted by Rob Keller

1985 CHEVY SUBURBAN 3/4 TON

10.5 ring gear 14 Bolt Full Floater rear with dual proportion valves.

I need a know how to check of this is defective.

I also need to know what it looks like inside{ a explosion view.
The only way I know of checking proper operation of this type of proportioning valve ( it increases line pressure to the rear brakes with payload increase) is to use line gauges. The procedure will be described fully in the appropriate year shop manual.

Does this truck have rear ABS also?

I think I have a fresh CHEV Shop Manual here for this truck if interested.
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Old 09-22-2006, 07:01 AM
Rob Keller's Avatar
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Dear Mikey.. .. .. .. ..

Spelunking for microscopic parts after they have left the part @ Mach 1 is less fun than what I am doing now...

Quote:
You know it says that if the shaft spins freely the valve is defective.
NO I must have missed that part I will re read.

Well its kind of a toss up to weather it turns freely or not its like there is a sliding block in there that moves around when its turned back & forth

KULTULZ

NO ABS its a 85 has no computer or any of that fancy stuffs
{imagine the hell I would be in if it did.}
might be simpler too?

What kind of book are we talking about?
how much$$$???
Could you look in it to see if the info I need is in there?

Where can I obtain a pressure Gage & what would be the procedure in using this device?

Thanks for your time

R
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Old 09-22-2006, 07:19 AM
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Rob,

Do you have a fax machine, I cant copy and past off Alldata, but I can print and fax if you can receive.

Steve
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Old 09-22-2006, 07:25 AM
aka Duke of URL
 
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Quote:
Originally Posted by Rob Keller

KULTULZ

NO ABS its a 85 has no computer or any of that fancy stuffs

{imagine the hell I would be in if it did.}
might be simpler too?

What kind of book are we talking about?
how much$$$???

Could you look in it to see if the info I need is in there?

Where can I obtain a pressure Gage & what would be the procedure in using this device?

Thanks for your time

R
It is a GENUINE CHEVROLET LIGHT TRUCK REPAIR MANUAL (in excellent condition). I cannot remember the model year, either 85 or 86. I need to pull it out. It is left over from my repair years.

If it is correct for your application, I will make you a fair deal on it.
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