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barozaku Samba Member
Joined: December 07, 2007 Posts: 26 Location: Berkley, MI, USA
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Posted: Mon Sep 15, 2008 2:59 pm Post subject: Syncro vacuum diagram for front/rear diff-lock controls? |
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While sorting out some minor wiring issues on my DoKa Syncro, I disconnected the front/rear diff-lock controls and want to be sure I have the vacuum lines reconnected properly. Can anybody tell me the proper color sequence for the vacuum lines connected to the control knobs? |
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Dogpilot Samba Member
Joined: October 03, 2005 Posts: 4205 Location: Flagstaff, AZ
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sunshine_norway Samba Member
Joined: September 17, 2007 Posts: 76 Location: Norway
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tencentlife Samba Member
Joined: May 02, 2006 Posts: 10078 Location: Abiquiu, NM, USA
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Posted: Tue Sep 16, 2008 7:52 pm Post subject: |
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Hey thanks. That's gonna help me if I ever find one of those control panels, or at least one valve. I have a Syncro with the rear locker but no actuating gear yet. _________________ Shop for unique Vanagon accessories at the Vanistan shop:
https://intrepidoverland.com/vanistan/
Please don't PM here, I will not reply.
Experience is kryptonite to doctrine. |
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barozaku Samba Member
Joined: December 07, 2007 Posts: 26 Location: Berkley, MI, USA
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Posted: Thu Sep 18, 2008 5:20 am Post subject: |
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Thanks... It helps a ton. |
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barozaku Samba Member
Joined: December 07, 2007 Posts: 26 Location: Berkley, MI, USA
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Posted: Thu Jul 23, 2009 10:22 am Post subject: |
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Small update... I did use all your input to help me verify the "plumbing" of the lines @ the controls. However, shortly thereafter, much bigger repair issues arose that kind of overshadowed that small victory. Durring that period, the front diff actuator had to be rebuilt to get it to work, and the rear is still not functioning do to a vacuum leak elswhere. Like my Speedo gear repair, the circumstances that lead up to these discoveries/repairs were not very pleasant, but now that everything has been back together for a while, the DoKa runs/drives beautifully... _________________ '89 Transporter DoKa TriStar SYNCRO TDi |
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T3 Pilot Samba Member
Joined: January 10, 2011 Posts: 1507 Location: Deep South of the Great White North
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Posted: Sat Oct 01, 2011 7:00 pm Post subject: |
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Check your check valve. _________________ 1988 Vanagon
The most important part in every vehicle is the nut behind the wheel...... |
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SyncroGhia Samba Member
Joined: August 21, 2009 Posts: 2458 Location: Highnam, UK
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Posted: Sun Oct 02, 2011 12:02 am Post subject: |
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The easy way to diagnose which part is at fault is to remove it from the system.
Just connect the two pipes together up front which would activate the difflock, jack up one side of your syncro so that both wheels on that side can turn and have the engine ticking over. Slowly turn the wheels around by hand and your diff lock should engage.
If it doesn't the problem is not the front switch.
Have you had the difflock actuator off and checked that the difflock pin can move easily?
MG _________________ T3 Syncro 16 S6 Westfalia Limey SOLD
T3 Syncro 6x6 SOLD
T3 RS6 Bluestar
T3 Tristar Syncro 16 SOLD
T3 Tristar Syncro RHD SOLD |
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IdahoDoug Samba Member
Joined: June 12, 2010 Posts: 10251 Location: N. Idaho
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Posted: Thu Apr 05, 2012 11:41 am Post subject: |
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Looking at the diagram above, can anyone confirm the orientation of the hoses at the rear actuator? It seems to show that the blue line goes on the nipple farthest from the tranny. My blue vacuum line was on the other one. PO screwup, or was there a change? 87 Syncro. Thanks!
DougM _________________ 1987 2WD Wolfsburg Vanagon Weekender "Mango", two fully locked 80 Series LandCruisers. 2017 Subaru Outback boxer. 1990 Audi 90 Quattro 20V with rear locking differential, 1990 burgundy parts Vanagon. 1984 Porsche 944, 1988 Toyota Supra 5 speed targa, 2002 BMW 325iX, 1982 Toyota Sunrader |
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IdahoDoug Samba Member
Joined: June 12, 2010 Posts: 10251 Location: N. Idaho
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Posted: Thu Apr 05, 2012 11:47 am Post subject: |
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Also, any info on taking the rear locker actuator off? I want to clean and check things as it's easy to get to right now with the axles off. But it looks like you pry it apart and I don't want to break it if there's a trick to it. Thanks. _________________ 1987 2WD Wolfsburg Vanagon Weekender "Mango", two fully locked 80 Series LandCruisers. 2017 Subaru Outback boxer. 1990 Audi 90 Quattro 20V with rear locking differential, 1990 burgundy parts Vanagon. 1984 Porsche 944, 1988 Toyota Supra 5 speed targa, 2002 BMW 325iX, 1982 Toyota Sunrader |
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GWTWTLW Samba Member
Joined: April 22, 2008 Posts: 2174 Location: Portland, OR
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Posted: Thu Apr 05, 2012 11:49 am Post subject: |
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In addition, where does the vacuum tank connect to the vacuum? I am about to install my plumbing.
Thx! _________________ 89 Syncro Westy - GW 2.5, now with a double knob job
@gwtwtlw |
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IdahoDoug Samba Member
Joined: June 12, 2010 Posts: 10251 Location: N. Idaho
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Posted: Thu Apr 05, 2012 12:20 pm Post subject: |
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gw,
Clarify that question, I can probably tell you since Im under mine.
So, learning as I go here the whole roll pin, 3mm punch, pulling the boot back to access it and get the thing off. No way my boot is going to "roll back" as it has a thick black rubber protective hose over it with a thick metal band around the center. How do you move THAT stout thing back? I saw someone was going to dremel theirs off but the thread ended. Is that the solution?
Also, I am using a Mity Vac hand vacuum pump with a guage on it in hopes while I'm cleaning the bolts up for removal the actuator pin/rod will move. What's a safe vacuum level to use? I've been at 15psi with no result. More?
DougM _________________ 1987 2WD Wolfsburg Vanagon Weekender "Mango", two fully locked 80 Series LandCruisers. 2017 Subaru Outback boxer. 1990 Audi 90 Quattro 20V with rear locking differential, 1990 burgundy parts Vanagon. 1984 Porsche 944, 1988 Toyota Supra 5 speed targa, 2002 BMW 325iX, 1982 Toyota Sunrader |
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IdahoDoug Samba Member
Joined: June 12, 2010 Posts: 10251 Location: N. Idaho
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Posted: Thu Apr 05, 2012 12:25 pm Post subject: |
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gw,
Here's a great thread/diagram for you:
http://www.thesamba.com/vw/forum/viewtopic.php?t=319128&highlight=actuator+diff+lock _________________ 1987 2WD Wolfsburg Vanagon Weekender "Mango", two fully locked 80 Series LandCruisers. 2017 Subaru Outback boxer. 1990 Audi 90 Quattro 20V with rear locking differential, 1990 burgundy parts Vanagon. 1984 Porsche 944, 1988 Toyota Supra 5 speed targa, 2002 BMW 325iX, 1982 Toyota Sunrader |
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GWTWTLW Samba Member
Joined: April 22, 2008 Posts: 2174 Location: Portland, OR
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Posted: Thu Apr 05, 2012 12:52 pm Post subject: |
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Arrrg! You've put me in an endless loop!
I'm wondering where in the vacuum system you tap into to fill up the reservoir. In the diagram, it is the line going out of the reservoir and ending.
Thx! _________________ 89 Syncro Westy - GW 2.5, now with a double knob job
@gwtwtlw |
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FrankenSubySyncro Samba Member
Joined: May 03, 2007 Posts: 638 Location: Vancouver, WA.
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Posted: Thu Apr 05, 2012 3:56 pm Post subject: |
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GWTWTLW wrote: |
Arrrg! You've put me in an endless loop!
I'm wondering where in the vacuum system you tap into to fill up the reservoir. In the diagram, it is the line going out of the reservoir and ending.
Thx! |
Pete the vacuum line tees off of the brake booster line that runs from front to back underneath on the drivers side frame rail. I have an extra vacuum reservoir and check valve. The tee for the brake booster line can be found at most auto parts stores, I forget the size right now.
I am still willing to help you with this, I have been busy and was thinking you maybe able to wait until it warms up. PM me and we can talk about it more. We will need to change the gear oil too so I would start looking for swepco 210. _________________ Syncronize it!
1987 Franken Syncro (converted 2WD auto)
2004 2.5 SOHC Subaru
F & R lockers, decoupler, SS, 6.17 R&P
Trans Cooler
EMPI race prepped 930 CVs and axles
Bilstein coilover front, rear ProComp MX-6066R shocks, 14" hypercoil springs
30x9.5 15" BFG Muds
Custom skid plates
Nose job (custom front bumper) http://www.flickr.com/photos/subyvanagon/sets/72157624970330925/ |
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IdahoDoug Samba Member
Joined: June 12, 2010 Posts: 10251 Location: N. Idaho
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Posted: Thu Apr 05, 2012 6:24 pm Post subject: |
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Heh - I got your endless loop!! I'll be under the van in about 20 minutes and will describe that spot Frankensuby's mentioned. Do you have a vacuum reservoir under there now? _________________ 1987 2WD Wolfsburg Vanagon Weekender "Mango", two fully locked 80 Series LandCruisers. 2017 Subaru Outback boxer. 1990 Audi 90 Quattro 20V with rear locking differential, 1990 burgundy parts Vanagon. 1984 Porsche 944, 1988 Toyota Supra 5 speed targa, 2002 BMW 325iX, 1982 Toyota Sunrader |
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syncrodoka Samba Member
Joined: December 27, 2005 Posts: 12008 Location: Santa Cruz, CA
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Posted: Thu Apr 05, 2012 6:48 pm Post subject: |
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GWTWTLW mine isn't stock but you get the idea.
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IdahoDoug Samba Member
Joined: June 12, 2010 Posts: 10251 Location: N. Idaho
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Posted: Thu Apr 05, 2012 7:23 pm Post subject: |
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Syncrodoka,
Nice shot. The T is 9 1/2" forward of the major frame crossmember on the right side outboard of the longitudinal frame on the brake vacuum line.
So, I've tapped the roll pin partly out of the locker actuator rod. I have two spare. Before knocking that pin out and committing, I want to try to grab the actuator rod and see if it will loosen up first. Can anyone tell me approximately how far the actuator rod moves? That will help me not bugger up the part of the rod that goes in and out if my cloth slips. Thanks.
DougM _________________ 1987 2WD Wolfsburg Vanagon Weekender "Mango", two fully locked 80 Series LandCruisers. 2017 Subaru Outback boxer. 1990 Audi 90 Quattro 20V with rear locking differential, 1990 burgundy parts Vanagon. 1984 Porsche 944, 1988 Toyota Supra 5 speed targa, 2002 BMW 325iX, 1982 Toyota Sunrader |
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syncrodoka Samba Member
Joined: December 27, 2005 Posts: 12008 Location: Santa Cruz, CA
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Posted: Thu Apr 05, 2012 7:52 pm Post subject: |
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The full stroke of the actuator is 20mm. |
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IdahoDoug Samba Member
Joined: June 12, 2010 Posts: 10251 Location: N. Idaho
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Posted: Thu Apr 05, 2012 8:03 pm Post subject: |
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Excellent! Enough to grab onto. Soaking in PB a few hours now. Any thoughts on twisting? I see the shaft from the actuator is offcenter, so that should be a limiter to only a few degrees before I risk that, but wondering about the other end in the tranny. Parts diag seems to indicate it would be OK. Now thinking of twist to loosen, no longer to get roll pin out as I handled it with something highly technical. I ........ um ........pushed the shifter into another gear and it was totally out of the way. cough.....
DougM _________________ 1987 2WD Wolfsburg Vanagon Weekender "Mango", two fully locked 80 Series LandCruisers. 2017 Subaru Outback boxer. 1990 Audi 90 Quattro 20V with rear locking differential, 1990 burgundy parts Vanagon. 1984 Porsche 944, 1988 Toyota Supra 5 speed targa, 2002 BMW 325iX, 1982 Toyota Sunrader |
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