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EZ Gruv
King of Plaid
Joined: December 10, 2002
Posts: 8544
Location: Las Vegas
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 Posted: Mon Jan 05, 2015 5:14 pm Post subject: Brake Pressure Regulator/Proportioning Valve |
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Apparently mine is leaking, and the used one the shop had also leaked.
Anyone know of a source for these?
1977 Westy.
Thanks
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Eric
1977 Deluxe Westfalia - 2.0L FI Type IV, Completely Original
Photographer for HotVWs, VolksWorld, AirMighty, VW Camper & Commercial, Hayburner, and more.
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aeromech
Samba Member
Joined: January 24, 2006
Posts: 16971
Location: San Diego, California
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| Posted: Mon Jan 05, 2015 6:54 pm Post subject: |
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Hey EZ,
I had a spare but used it on a bus with one that was also leaking. Seems like if i could find the old one I could split it and figure out why it's leaking and try to solve that problem. I'm assuming it's much like a brake caliper and has seals that are unobtainium. Sorry I can't help.
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SGKent 
Samba Member
Joined: October 30, 2007
Posts: 41031
Location: Citrus Heights CA (Near Sacramento)
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| Posted: Mon Jan 05, 2015 6:59 pm Post subject: |
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they are out NOS there but expensive. I found one and Hoody found two.
Scott at German Supply was rebuilding them and selling the remanufactured ones. Happy hunting. Otherwise check used with someone like Ken Madsen at Busco or Chris at Busted Bus. Make sure it is for a 1977 (late bay). Early bay ones are different. Also - sometimes the upper reservoir leaks onto the frame rail and down onto the valve. Make sure that isn't the real culprit. We've had people with rust lines have the same issue and it wasn't the valve.
for more see http://www.thesamba.com/vw/forum/viewtopic.php?t=351235
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EZ Gruv
King of Plaid
Joined: December 10, 2002
Posts: 8544
Location: Las Vegas
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| Posted: Mon Jan 05, 2015 7:22 pm Post subject: |
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| SGKent wrote: |
they are out NOS there but expensive. I found one and Hoody found two.
Scott at German Supply was rebuilding them and selling the remanufactured ones. Happy hunting. Otherwise check used with someone like Ken Madsen at Busco or Chris at Busted Bus. Make sure it is for a 1977 (late bay). Early bay ones are different. Also - sometimes the upper reservoir leaks onto the frame rail and down onto the valve. Make sure that isn't the real culprit. We've had people with rust lines have the same issue and it wasn't the valve.
for more see http://www.thesamba.com/vw/forum/viewtopic.php?t=351235 |
The German Supply website says out of stock. Haven't checked Busco yet, Busted Bus' website didn't list one, but I'll email Chris.
The mechanic diagnosed the initial issue, and they put on one off a parts bus, and it leaked as well. I trust this shop, they've always done me right.
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Eric
1977 Deluxe Westfalia - 2.0L FI Type IV, Completely Original
Photographer for HotVWs, VolksWorld, AirMighty, VW Camper & Commercial, Hayburner, and more.
My Photography Page. |
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aeromech
Samba Member
Joined: January 24, 2006
Posts: 16971
Location: San Diego, California
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| Posted: Mon Jan 05, 2015 7:27 pm Post subject: |
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Why not split yours apart and see what's up?
_________________
Lead Mechanic: San Diego Air and Space Museum
Licensed Airframe and Powerplant Mechanic
Licensed Pilot (Single engine Land)
Boeing 727,737-200-300-400,757,767
Airbus A319,320,321
DC9/MD80
BAe146
Fokker F28/F100
VW type 1 1962,63,65,69,72
VW Type 2 1971 (3 ea.) 1978, 1969
VW Jetta
VW Passat
Capable of leaping tall buildings in a single bound |
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EZ Gruv
King of Plaid
Joined: December 10, 2002
Posts: 8544
Location: Las Vegas
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| Posted: Mon Jan 05, 2015 7:38 pm Post subject: |
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| aeromech wrote: |
| Why not split yours apart and see what's up? |
I'll ask the shop if it's possible, they have it.
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Eric
1977 Deluxe Westfalia - 2.0L FI Type IV, Completely Original
Photographer for HotVWs, VolksWorld, AirMighty, VW Camper & Commercial, Hayburner, and more.
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Hoody
Samba Member
Joined: November 28, 2007
Posts: 1948
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| Posted: Mon Jan 05, 2015 8:56 pm Post subject: |
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| I just sold my last one. These are VERY hard to find NOS. Try e-mailing Jeffrey at BusOk. He had at least one for sale not long ago. If it is leaking then the seals inside it are spent and as far as I know they are not available. Also the "rebuilding" of them from what I was told was only a splitting of them, cleaning them up and reassembling them. It would be nice if someone would reproduce the seals inside the valves. |
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aeromech
Samba Member
Joined: January 24, 2006
Posts: 16971
Location: San Diego, California
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| Posted: Tue Jan 06, 2015 7:34 am Post subject: |
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Raygreenwood had some seals made for the calipers. It would be too cool if they fit.
_________________
Lead Mechanic: San Diego Air and Space Museum
Licensed Airframe and Powerplant Mechanic
Licensed Pilot (Single engine Land)
Boeing 727,737-200-300-400,757,767
Airbus A319,320,321
DC9/MD80
BAe146
Fokker F28/F100
VW type 1 1962,63,65,69,72
VW Type 2 1971 (3 ea.) 1978, 1969
VW Jetta
VW Passat
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SGKent
Samba Member
Joined: October 30, 2007
Posts: 41031
Location: Citrus Heights CA (Near Sacramento)
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| Posted: Tue Jan 06, 2015 10:30 am Post subject: |
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Did you call Scott at German Supply? I just did and they are in stock - the website was updated this morning.
Scott wrote to me this morning:
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| we have the '73-'79 valves in stock, the '71-'72 valves are core rebuild only at the moment. so we can still do the '71-'72 valve but only with a supplied core. |
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raygreenwood
Samba Member
Joined: November 24, 2008
Posts: 21519
Location: Oklahoma City
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| Posted: Tue Jan 06, 2015 5:43 pm Post subject: |
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| aeromech wrote: |
| Raygreenwood had some seals made for the calipers. It would be too cool if they fit. |
If they are "round" seals.....and not too complex or large I will post the name of the company that machined the caliper half seals. I am on a different laptop now. I will see if I have their name in my jump drive. If not I can get it when I get back in town.
They do CNC rubber work. Quite accurate. Proper material...EPDM.
Reasonable price (for what I ordered)....about $150 for I think 75-100 seals.
What do the seals look like in that part?
Ray
EDIT: it would be good to know exact sizes and shapes of the seals you need. A gentleman on either STF or Samba sent me a bag of caliper half seals (they dont fit my calipers) but they are EPDM.....and if I can find a size usage for them I will pass them on to whoever can use them.
When I get home I will measure and post the size. Ray
Last edited by raygreenwood on Tue Jan 06, 2015 5:45 pm; edited 1 time in total |
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EZ Gruv
King of Plaid
Joined: December 10, 2002
Posts: 8544
Location: Las Vegas
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| Posted: Tue Jan 06, 2015 5:44 pm Post subject: |
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Ray, not sure at the moment what the seals look like.
Busted Bus had the part, and they are shipping tomorrow.
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Eric
1977 Deluxe Westfalia - 2.0L FI Type IV, Completely Original
Photographer for HotVWs, VolksWorld, AirMighty, VW Camper & Commercial, Hayburner, and more.
My Photography Page. |
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kreemoweet
Samba Member
Joined: March 13, 2008
Posts: 3899
Location: Seattle, WA
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| Posted: Tue Jan 06, 2015 7:28 pm Post subject: |
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It looks like the only seals that would be relevant to a leakage problem are the two cup seals on the pistons and the big o-ring type seal around the ball chamber.
I haven't opened one of those gizmos yet, so I can only guess from looking at the drawing (early bay version shown):
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Tcash
Samba Member
Joined: July 20, 2011
Posts: 12844
Location: San Jose, California, USA
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| Posted: Tue Jan 06, 2015 8:37 pm Post subject: Brake Pressure Regualtor |
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Is there a metal gasket between the two halves?
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EZ Gruv
King of Plaid
Joined: December 10, 2002
Posts: 8544
Location: Las Vegas
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| Posted: Tue Jan 06, 2015 8:47 pm Post subject: Re: Brake Pressure Regualtor |
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| Tcash wrote: |
Is there a metal gasket between the two halves?
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There is a gasket between the halves.
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Eric
1977 Deluxe Westfalia - 2.0L FI Type IV, Completely Original
Photographer for HotVWs, VolksWorld, AirMighty, VW Camper & Commercial, Hayburner, and more.
My Photography Page. |
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raygreenwood
Samba Member
Joined: November 24, 2008
Posts: 21519
Location: Oklahoma City
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| Posted: Wed Jan 07, 2015 4:53 am Post subject: |
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You know.....I think long ago I got into one of these just because I had one. Im tjinking maybe 30 years ago.
Anyway......so.....it looks like (from Tcash's highlighting)......that there is a large diameter o-ring(?) On the centerline of the split case, and two cups....and a gasket?
I think I have commented before....that the piston set up appears to be almost identical configuration to thd type 4/porsche 914 brake pressure regulator.....but that one is a single piston with two cups. Doubtful that the parts would fit. ....and they are unobtanium anyway.
But.....back in the mid 90s I used to have the same type of CNC shop make seal cups for my type 4 brakes pressure regulator.
Back then.....the cups I had made were the wrong material. Its all they could do at the time. The hardness/elasticity was all wrong.....so I had to order like 5 sets just to get one set to work because the cups would rip stretching over the pistons.
I will post the companies I have that can do this type of work as and will be happy to jnquire once measurements get made. Ray |
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Hoody
Samba Member
Joined: November 28, 2007
Posts: 1948
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| Posted: Tue Feb 20, 2018 7:36 pm Post subject: Re: Brake Pressure Regulator/Proportioning Valve |
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| I managed to locate another one of these. If someone wants one of the last ones on earth pm me. |
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raygreenwood
Samba Member
Joined: November 24, 2008
Posts: 21519
Location: Oklahoma City
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| Posted: Tue Feb 20, 2018 7:57 pm Post subject: Re: Brake Pressure Regulator/Proportioning Valve |
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| Hoody wrote: |
| I managed to locate another one of these. If someone wants one of the last ones on earth pm me. |
Hey....if you have and old one you can open....measure the ID, OD and thickneas of the seal cups. O-ings are easy.....but if you can post some pucs and measurements....the cups may be something CNC rubber shop could easily make. Ray |
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Hoody
Samba Member
Joined: November 28, 2007
Posts: 1948
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| Posted: Tue Feb 20, 2018 8:17 pm Post subject: Re: Brake Pressure Regulator/Proportioning Valve |
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| I only have nos ones and one good used one. The nos ones are for my Bus in the future and I have a spare to sell. This part is absolutely critical to the braking system and rare as hell. |
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raygreenwood
Samba Member
Joined: November 24, 2008
Posts: 21519
Location: Oklahoma City
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| Posted: Tue Feb 20, 2018 8:55 pm Post subject: Re: Brake Pressure Regulator/Proportioning Valve |
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| Hoody wrote: |
| I only have nos ones and one good used one. The nos ones are for my Bus in the future and I have a spare to sell. This part is absolutely critical to the braking system and rare as hell. |
Yep...fully understand. The type 4 proportioning valve is rare as well. We are just lucky that ours is the same one for 914.....so there is one company that fully...and i mean FULLY rebuilds them...down to new bore plating, seals, paint and adjustment.
If you can disassemble one to measure the cups...disassembly should not change the adjustment.....cups.....can be made fairly cheap. Ray |
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aeromech
Samba Member
Joined: January 24, 2006
Posts: 16971
Location: San Diego, California
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| Posted: Tue Feb 20, 2018 9:17 pm Post subject: Re: Brake Pressure Regulator/Proportioning Valve |
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Ray,
I’m pretty sure I have a crusty one somewhere if I can find it. Do you need me to look?
_________________
Lead Mechanic: San Diego Air and Space Museum
Licensed Airframe and Powerplant Mechanic
Licensed Pilot (Single engine Land)
Boeing 727,737-200-300-400,757,767
Airbus A319,320,321
DC9/MD80
BAe146
Fokker F28/F100
VW type 1 1962,63,65,69,72
VW Type 2 1971 (3 ea.) 1978, 1969
VW Jetta
VW Passat
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