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Plumbing Trailer Brake Hand Valve


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Bringing this up once again because I've been studying the schematic and I'm just really not understanding how to plumb it. When I saw RandyA's pics when he replaced his dash control valve it looked like there was a 3/8" line coming down from his dash valve and connecting into the hand valve. Anybody able to simplify this for me? My goal is to plumb the hand valve in so I can use it similar to the slide bar on my MaxBrake. BTW my truck did not come with a trailer brake hand valve.

http://www.hhrvresource.com/sites/default/files/dfiles/AirBrakeFoldoutSchematic.pdf

2006 Volvo 780 "Hoss" Volvo D12, 465hp, 1650 ft/lbs tq., ultrashift

Bed Build by "JW Morgan's Custom Welding"

2017 DRV 39DBRS3

2013 Smart Passion Coupe "Itty Bitty"

 

"Don't go around saying the world owes you a living. The world owes you nothing. It was here first!"

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May not be helpful, but my direclink gets the info from the computer. Only connection is to the diagnostic port.

 

Now to be more helpful. Can you go to the dealer and have them print out a schematic of how the hoses are plumbed. You may have to have the computer updated too.

Ron C.

2013 Dynamax Trilogy 3850 D3

2000 Kenworth T2000 Optimus Prime

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Thanks Ron and hope you are feeling well. Tried to get schematic from dealer and they printed something like my link. Hoping someone has added a trolley and could walk me through it.

2006 Volvo 780 "Hoss" Volvo D12, 465hp, 1650 ft/lbs tq., ultrashift

Bed Build by "JW Morgan's Custom Welding"

2017 DRV 39DBRS3

2013 Smart Passion Coupe "Itty Bitty"

 

"Don't go around saying the world owes you a living. The world owes you nothing. It was here first!"

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The picture I have attached is different than the one you attached. It may or may not be of help. I do not know if there is a difference between Gen 1 and Gen 2 in air-line routing.

 

As I understand your issue, you already have some sort of air-over-electric controller that works. You just want to add and connect a trailer brake trolley lever.

 

On my schematic, the trailer brake lever (15) is simply attached between the manifold dash valve (13) and the manifold tractor protection valve (16).

 

On your pdf, the trailer brake lever (30) is attached in the red-secondary suppy line that also feeds the brake pedal valve (31). The output from the trailer brake lever then goes to a two-way check valve (26) and then feeds to another two-way check valve (26) that may or may not be part of the tractor protection valve (24). Clear as mud.

 

IMO, you should find someone parked next to you with a trailer hand brake in an '06 Volvo and trace those air-lines out. Good project for the ECR.

 

 

post-27099-0-82446300-1480728000_thumb.png

Chet & Deb
'01 Volvo 660 w/ Smart
'19 Forest River Columbus 320RS 5th wheel
2022 Chev 2500HD Long Bed
Retired CWO4, USN and federal service
Electronics Tech/Network Engineer/Welder/Machinist

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Chet,

 

Thanks. I understand that explanation and schematic and that seems to be in line with what Randy's pictures showed--an extra line coming from the dash valve. I'll take your advice and wait until ECR. Hopefully I'll have some free time.

2006 Volvo 780 "Hoss" Volvo D12, 465hp, 1650 ft/lbs tq., ultrashift

Bed Build by "JW Morgan's Custom Welding"

2017 DRV 39DBRS3

2013 Smart Passion Coupe "Itty Bitty"

 

"Don't go around saying the world owes you a living. The world owes you nothing. It was here first!"

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I moved my trolley brake (sorry, old timer) to my Gen1 AS pedestal along w/ my Jake switches. I can play it like a piano, my hand falls right on it. The trolley valve is usually labeled "in" etc

2000 Volvo 635 A/S, N-14 Cummins
"The Phoenix"
'03 KA 38KSWB

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Carl - I found my schematic but it is identical to the one Chet posted. His description follows what I was thinking. Doesn't Charlie have a trolley brake lever on his '06?

300.JPG.c2a50e50210ede7534c4c440c7f9aa80.JPG

Randy, Nancy and Oscar

"The Great White" - 2004 Volvo VNL670, D12, 10-speed, converted to single axle pulling a Keystone Cambridge 5th wheel, 40', 4 slides and about 19,000# with empty tanks.

ARS - WB4BZX, Electrical Engineer, Master Electrician, D.Ed., Professor Emeritus - Happily Retired!

 

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Guys, this isn't complicated. There is one line in, supply. There are 2 lines out, 1 to trailer feed & one is exhaust. They are usually labeled on the casting.

Ron,

 

And I assume supply comes from the dash valve as in the schematic?

2006 Volvo 780 "Hoss" Volvo D12, 465hp, 1650 ft/lbs tq., ultrashift

Bed Build by "JW Morgan's Custom Welding"

2017 DRV 39DBRS3

2013 Smart Passion Coupe "Itty Bitty"

 

"Don't go around saying the world owes you a living. The world owes you nothing. It was here first!"

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Guys, this isn't complicated. There is one line in, supply. There are 2 lines out, 1 to trailer feed & one is exhaust. They are usually labeled on the casting.

Actually, there are six lines.

 

pulloutvalveright11.jpg

 

pulloutvalveleft12.jpg

 

Never did bother to check which one went to the trolley valve when I replaced my dash valve. I know Carl wants to be sure about which line to cut or move before he starts experimenting. Short of tearing my dash open again to verify I can't tell more than what I garner from the schematic and the valve photos above.

 

There are some labels on the valve casting but I cannot read all of them in the photos. Looks like bottom right is exhaust and upper right is AUX - not sure about other side labels. I assume one of the two bottom lines (orange or yellow) are exhaust lines for the trailer (why 2?). I will retrieve the old valve tomorrow and post what the labels are. Meanwhile maybe Carl can match colors to the schematic for line ID.

 

 

olddashvalveremovaln15-1.jpg

300.JPG.c2a50e50210ede7534c4c440c7f9aa80.JPG

Randy, Nancy and Oscar

"The Great White" - 2004 Volvo VNL670, D12, 10-speed, converted to single axle pulling a Keystone Cambridge 5th wheel, 40', 4 slides and about 19,000# with empty tanks.

ARS - WB4BZX, Electrical Engineer, Master Electrician, D.Ed., Professor Emeritus - Happily Retired!

 

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I must resist.

 

I could say something about Carl wanting to pull on his Johnson but I won't.

 

I really won't.

 

For you youngsters, that trolley bar was also known as a Johnson Bar back in the day.

 

At least with the memory that most of us on here have, this will be forgotten in a couple of days. ?

2017 Kenworth T680
2015 DRV 38RSSA Elite Suites
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It would appear what is in the hand is not the trolley valve, but the park & breakaway valve.

That is correct but the schematic shows a line looping from that valve to the trolley probably a supply line as you mentioned. I replaced my dash valve last year and I was using Randy's pictures as a check guide. He had one more 3/8" line than I had and I assume that was to the trolley but wanted to be sure.

2006 Volvo 780 "Hoss" Volvo D12, 465hp, 1650 ft/lbs tq., ultrashift

Bed Build by "JW Morgan's Custom Welding"

2017 DRV 39DBRS3

2013 Smart Passion Coupe "Itty Bitty"

 

"Don't go around saying the world owes you a living. The world owes you nothing. It was here first!"

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On mine, it is the top black line shown in Randy's pic. But, there is a distinct possibility that I have new lines behind the dash in places.

I'm thinking that is the loop also Jim. I'll review my pics but am pretty sure that was the one I didn't have when I changed my dash valve.

2006 Volvo 780 "Hoss" Volvo D12, 465hp, 1650 ft/lbs tq., ultrashift

Bed Build by "JW Morgan's Custom Welding"

2017 DRV 39DBRS3

2013 Smart Passion Coupe "Itty Bitty"

 

"Don't go around saying the world owes you a living. The world owes you nothing. It was here first!"

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I must resist.

 

I could say something about Carl wanting to pull on his Johnson but I won't.

 

I really won't.

 

For you youngsters, that trolley bar was also known as a Johnson Bar back in the day.

 

At least with the memory that most of us on here have, this will be forgotten in a couple of days.

Hope it's not the "Big Johnson" bar.......

(like all the shirts said)

Alie & Jim + 8 paws

2017 DRV Memphis 

BART- 1998 Volvo 610

Lil'ole 6cyl Cummins

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Ron,

 

Go here, pull up your pic on "select" then just copy and paste the link that shows up in the box.

 

http://photoposting.is-great.net/?i=1

2006 Volvo 780 "Hoss" Volvo D12, 465hp, 1650 ft/lbs tq., ultrashift

Bed Build by "JW Morgan's Custom Welding"

2017 DRV 39DBRS3

2013 Smart Passion Coupe "Itty Bitty"

 

"Don't go around saying the world owes you a living. The world owes you nothing. It was here first!"

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Looking at the old disassembled valve.

 

Top right is AUX 23 and has a black hose.

Center Right is RES1 11 and has a Green hose.

Bottom Right is EXH 3 and has a yellow hose.

 

Top Left is TRAC 22 and and has a dark orange hose (may be dark tan?_

Center Left is RES 2 12 and has a red hose.

Bottom Left is TRLR 21 and has a light orange hose (may be tan?)

 

Observing the hose colors as identified on the schematic:

 

Top Left TRAC 22 with a dark orange hose should be the trailer supply circuit (cross check with schematic)

parking brake circuit.

Center Left RES 2 12 with a red hose should be for the front service brake circuit.

Bottom Left is TRLR 21 with a light orange hose and should be for the parking brake circuit.

 

Top right is AUX 23 and with a black hose and should be a supply.

Center Right is RES 2 12 with a red hose and should be the front service brake circuit..

Bottom Right is EXH 3 with a a yellow hose which does not have a place in the schematic

 

There is a gray line that does not visually exist on my truck. The grey line is for the trailer hand control circuit (Trolley Handle) that IS installed on my truck. So... the schematic is not for my truck.

 

Soooo.... looks like there are some things the schematic does not match on my truck which came with the trolley bar. Don't know if this helps Carl or not.

300.JPG.c2a50e50210ede7534c4c440c7f9aa80.JPG

Randy, Nancy and Oscar

"The Great White" - 2004 Volvo VNL670, D12, 10-speed, converted to single axle pulling a Keystone Cambridge 5th wheel, 40', 4 slides and about 19,000# with empty tanks.

ARS - WB4BZX, Electrical Engineer, Master Electrician, D.Ed., Professor Emeritus - Happily Retired!

 

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