Hello! Log in or Register   |  Help  |  Donate  |  Buy Shirts See all banner ads | Advertise on TheSamba.com  
TheSamba.com
 
Brake Pedal Push Rod Vs. Master Cylinder Preload
Page: Previous  1, 2, 3  Next
Forum Index -> Split Bus Share: Facebook Twitter
Reply to topic
Print View
Quick sort: Show newest posts on top | Show oldest posts on top View previous topic :: View next topic  
Author Message
otis_bartleh
Samba Member


Joined: August 19, 2009
Posts: 1105
Location: Martinez, CA
otis_bartleh is offline 

PostPosted: Fri Jan 24, 2014 10:50 pm    Post subject: Reply with quote

Sidbus wrote:

Otis,

You described the same problem I was having. Same replacement MC from WW. I got lucky and didn't have to cut threads…was able to get the pin back far enough by slightly bending back the pedal stop. It only took a tiny bit more space. I actually heard the pressure release and my front calipers let go of the wheel.

(and I still have clearance between linkage arm and bottom of floor)


I had tried that, but I needed even more space... Luck of the draw I guess.
_________________
-Adam
'59 Mango Bus
'69 Bug
Back to top
View user's profile Send private message Gallery Classifieds Feedback
Siggi 66
Samba Member


Joined: May 06, 2013
Posts: 29
Location: Gloucester, Virginia, US
Siggi 66 is offline 

PostPosted: Wed Apr 23, 2014 12:56 pm    Post subject: Reply with quote

I wonder if some PO had lost the 2 spacers from the MC mounting bolts between the front of the footwell & the panel the MC sits on. That might bring the MC back towards the pedals maybe about 1/2" as the gap between the panels closes when the MC mounting bolts were tightened. That would make the rod effectively too long. Just a thought.
_________________
Money's just something you need in case you don't die in your sleep tonight.
Back to top
View user's profile Send private message Gallery Classifieds Feedback
DerrickfromNC1
Samba Member


Joined: October 24, 2008
Posts: 1293
Location: North Carolina
DerrickfromNC1 is offline 

PostPosted: Fri Jul 04, 2014 4:44 am    Post subject: Reply with quote

rking6 wrote:
Same thing happened to me... I just put a spacer between the MC and the frame.. Works great.. Just a thought. Good Luck!! Bob King.. 63 EZ lOng Beach,, Ca


I'm having the same problem of brake preload on our 67 delux. Almost locked up the front wheels b4 I got it home & caused the engine to run hot. Front brakes are 944 n/a and rears are IRS beetle. I like the spacer solution because it is less permanent and I plan to install a 73-79 baywindow MC once I convert the rears to 944 discs.

Is it a simple as spacing the MC back by slipping a couple washers between the MC and the mounting flange where the mounting go thru?
Back to top
View user's profile Send private message Send e-mail Gallery Classifieds Feedback
otis_bartleh
Samba Member


Joined: August 19, 2009
Posts: 1105
Location: Martinez, CA
otis_bartleh is offline 

PostPosted: Fri Jul 04, 2014 9:17 am    Post subject: Reply with quote

DerrickfromNC1 wrote:

Is it a simple as spacing the MC back by slipping a couple washers between the MC and the mounting flange where the mounting go thru?


I don't think that would work as it would probably leave some vertical play. The spacers I've seen pics of were machine to match the outline of the MC where it mounts.
_________________
-Adam
'59 Mango Bus
'69 Bug
Back to top
View user's profile Send private message Gallery Classifieds Feedback
DerrickfromNC1
Samba Member


Joined: October 24, 2008
Posts: 1293
Location: North Carolina
DerrickfromNC1 is offline 

PostPosted: Fri Jul 04, 2014 3:03 pm    Post subject: Reply with quote

One on the right is for a 67 dual circuit master cylinder.
Image may have been reduced in size. Click image to view fullscreen.


Took a closer look today at the MC and it looks like one from a late baywindow without the spacer that's used for the conversion. Also the plunger if you can call it that is a bolt and on the head of the bolt someone welded some tangs that attached to the brake lever like the original plunger. There is a nut on this makeshift plunger that is used to adjust the play.
It works however the nut was backed up all the way to the unthreaded portion of the shaft at which point the brakes were still preloaded. As a test I placed a couple of washers between the MC and it's mounting flange. It works great, no more preload & the brake pedal fully returns to its original position.
Sounds like I need to get the correct spacer and plunger for my setup. Does anyone sell the conversion parts w/o the MC?
Back to top
View user's profile Send private message Send e-mail Gallery Classifieds Feedback
VWDUB64B
Samba Member


Joined: September 23, 2013
Posts: 1
Location: FL
VWDUB64B is offline 

PostPosted: Sat Apr 18, 2015 8:45 pm    Post subject: Reply with quote

Really appreciate the post. 64 Beetle and same issue bought the Varga MC and preload before I could bolt in. Thanks for all the options on the pushrod.
Back to top
View user's profile Send private message Classifieds Feedback
SamboSamba22
Samba Member


Joined: August 06, 2015
Posts: 2772
Location: Benton, Arkansas
SamboSamba22 is offline 

PostPosted: Thu Jul 20, 2017 7:49 pm    Post subject: Re: Brake Pedal Push Rod Vs. Master Cylinder Preload Reply with quote

Anyone have any sources for a replacement push rod, I'm in need for one on my single cab, single circuit system with a ATE master cylinder from WolfsburgWest. Also have a WTB ad up.
_________________
The Bus Barn Ltd. Co.

Oct. ’67 Double Cab (’68 Crew Cab)
[url=http://www.vw-mplate.com/mplate-44412.png]Click to view image[/URL]
March '69 Delivery (Panel Bus)
[url=http://www.vw-mplate.com/mplate-44414.png]Click to view image[/URL]
Back to top
View user's profile Send private message Send e-mail Facebook Instagram Gallery Classifieds Feedback
dlicious
Samba Member


Joined: September 07, 2006
Posts: 245
Location: Spring(pronounced Sprang), TX
dlicious is offline 

PostPosted: Sun Jul 23, 2017 7:36 pm    Post subject: Re: Brake Pedal Push Rod Vs. Master Cylinder Preload Reply with quote

SamboSamba22 wrote:
Anyone have any sources for a replacement push rod, I'm in need for one on my single cab, single circuit system with a ATE master cylinder from WolfsburgWest. Also have a WTB ad up.


I cut the head off a bolt and rounded it on a bench grinder. But that only works if you have the base it screws into.....
_________________
'63 Caravelle Camper
dLk
Back to top
View user's profile Send private message Gallery Classifieds Feedback
SamboSamba22
Samba Member


Joined: August 06, 2015
Posts: 2772
Location: Benton, Arkansas
SamboSamba22 is offline 

PostPosted: Sun Jul 23, 2017 7:49 pm    Post subject: Re: Brake Pedal Push Rod Vs. Master Cylinder Preload Reply with quote

Yeah I’m not having any luck finding one from a single circuit brake system found on early buses.
_________________
The Bus Barn Ltd. Co.

Oct. ’67 Double Cab (’68 Crew Cab)
[url=http://www.vw-mplate.com/mplate-44412.png]Click to view image[/URL]
March '69 Delivery (Panel Bus)
[url=http://www.vw-mplate.com/mplate-44414.png]Click to view image[/URL]
Back to top
View user's profile Send private message Send e-mail Facebook Instagram Gallery Classifieds Feedback
chrisflstf
Samba Member


Joined: February 10, 2004
Posts: 3413
Location: San Diego
chrisflstf is offline 

PostPosted: Sun Jul 23, 2017 8:47 pm    Post subject: Re: Brake Pedal Push Rod Vs. Master Cylinder Preload Reply with quote

I would look at repairing your old one. Weld it up, grind to finish
Back to top
View user's profile Send private message Gallery Classifieds Feedback
ToolBox
Samba Member


Joined: January 27, 2004
Posts: 3439
Location: Detroit, where they don't jack parts off my ride in the parking lot of the 7-11
ToolBox is offline 

PostPosted: Mon Jul 24, 2017 10:23 am    Post subject: Re: Brake Pedal Push Rod Vs. Master Cylinder Preload Reply with quote

SamboSamba22 wrote:
Yeah I’m not having any luck finding one from a single circuit brake system found on early buses.


Like said above just machine a bolt. I needed to cut mine down on my 59 to work with the new master. I need to make another soon to fit the dual master that will go on.
Back to top
View user's profile Send private message Send e-mail AIM Address Gallery Classifieds Feedback
SamboSamba22
Samba Member


Joined: August 06, 2015
Posts: 2772
Location: Benton, Arkansas
SamboSamba22 is offline 

PostPosted: Sat Sep 23, 2017 3:02 pm    Post subject: Re: Brake Pedal Push Rod Vs. Master Cylinder Preload Reply with quote

Verification to what is being stated, the replacement WW ATE single circuit master cylinder causes for a reduced (shortened) push rod.

Below you can see what is left of the one that was on the truck, and the replacement I made from a bolt at the local hardware store.

Image may have been reduced in size. Click image to view fullscreen.


NOTE: After replicating the original length (as seen above) and installation, it is engaging the master cylinder before the brake is engaging (preload) so I am still needing to shorten the rod to create the proper clearance between push rod and master cylinder.
_________________
The Bus Barn Ltd. Co.

Oct. ’67 Double Cab (’68 Crew Cab)
[url=http://www.vw-mplate.com/mplate-44412.png]Click to view image[/URL]
March '69 Delivery (Panel Bus)
[url=http://www.vw-mplate.com/mplate-44414.png]Click to view image[/URL]
Back to top
View user's profile Send private message Send e-mail Facebook Instagram Gallery Classifieds Feedback
Nubby
Samba Member


Joined: August 28, 2010
Posts: 605
Location: Down by the river
Nubby is offline 

PostPosted: Sat Sep 23, 2017 10:12 pm    Post subject: Re: Brake Pedal Push Rod Vs. Master Cylinder Preload Reply with quote

Brilliant!
Back to top
View user's profile Send private message Gallery Classifieds Feedback
Bruce Amacker
Samba Member


Joined: December 26, 2007
Posts: 1786
Location: Cleveland, Ohio
Bruce Amacker is offline 

PostPosted: Sun Sep 24, 2017 7:52 am    Post subject: Re: Brake Pedal Push Rod Vs. Master Cylinder Preload Reply with quote

And you need to grind a rounded "bullet point" on the pushrod. That sharp edge will damage the MC piston and maybe even hang up.
_________________
'66 Deluxe Bus
'65 Standard Bus
Build threads:
'66- http://www.leakoil.net/forum/viewtopic.php?f=23&t=2888&sid=54d8dedfb3822f99c7f2ea430cb4e856
'65- http://leakoil.net/forum/viewtopic.php?f=23&t=4263
Back to top
View user's profile Send private message Visit poster's website Gallery Classifieds Feedback
Skim
Rants Master


Joined: April 15, 2001
Posts: 17081
Location: GFK 31 Year Vet
Skim is offline 

PostPosted: Sun Sep 24, 2017 10:00 am    Post subject: Re: Brake Pedal Push Rod Vs. Master Cylinder Preload Reply with quote

SamboSamba22 wrote:
Verification to what is being stated, the replacement WW ATE single circuit master cylinder causes for a reduced (shortened) push rod.

Below you can see what is left of the one that was on the truck, and the replacement I made from a bolt at the local hardware store.

Image may have been reduced in size. Click image to view fullscreen.


NOTE: After replicating the original length (as seen above) and installation, it is engaging the master cylinder before the brake is engaging (preload) so I am still needing to shorten the rod to create the proper clearance between push rod and master cylinder.


I had to do the same thing today Cool
_________________
GFK
Samba since before the towers collapsed. Still here.
1953 Kabriolet
1954 Sunroof
1959 Lowlight Ghia vert
1960 Lt Grey Double Cab SMZ LEGIT
1963 Deluxe Turkis Walk Thru 15 Window OG Paint
Back to top
View user's profile Send private message Instagram Gallery Classifieds Feedback
otis_bartleh
Samba Member


Joined: August 19, 2009
Posts: 1105
Location: Martinez, CA
otis_bartleh is offline 

PostPosted: Fri Sep 29, 2017 1:04 pm    Post subject: Re: Brake Pedal Push Rod Vs. Master Cylinder Preload Reply with quote

Bruce Amacker wrote:
And you need to grind a rounded "bullet point" on the pushrod.


I was just thinking the same thing... Beyond that, excellent home made "part"!
_________________
-Adam
'59 Mango Bus
'69 Bug
Back to top
View user's profile Send private message Gallery Classifieds Feedback
62DoKaGuy
Samba Member


Joined: May 22, 2011
Posts: 1276
Location: Surprise, AZ
62DoKaGuy is offline 

PostPosted: Tue Jun 15, 2021 7:18 am    Post subject: Re: Brake Pedal Push Rod Vs. Master Cylinder Preload Reply with quote

Reviving this thread to ask/confirm to what length a pushrod should be adjusted in an April ‘59 single cab. The catch is I installed this new, German single circuit master cylinder from Wolfsburg West: https://www.wolfsburgwest.com/cart/DetailsList.cfm?ID=211611011JGR.

Bentley describes the adjustment for up to April ‘59 at 61-62mm of pushrod length and for May ‘59 onwards at 59-60mm. Which is correct? I need to adjust length from where it is regardless, as it has load on it, which is putting resistance at the wheels. They’ll turn but with some effort (yes, ebrake cable adjustment needs to be confirmed as well)

I’d like to know what the adjustment should be for my situation and adjust from there, as required. Cheers.
_________________
,,Wenige Menschen denken, und doch wollen alle entscheiden.'' -der Alte Fritz
EverettB wrote:
...I went at it from both ends but going from the rear didn't seem to do anything, although I did spray some rust breaker in there...

4/62 Double Cab
5/61 Panel (sold)
4/59 Single Cab (sold)
Back to top
View user's profile Send private message Gallery Classifieds Feedback
chrisflstf
Samba Member


Joined: February 10, 2004
Posts: 3413
Location: San Diego
chrisflstf is offline 

PostPosted: Tue Jun 15, 2021 7:53 am    Post subject: Re: Brake Pedal Push Rod Vs. Master Cylinder Preload Reply with quote

Back the pushrod out until you have about 1mm of play. Thats it
Back to top
View user's profile Send private message Gallery Classifieds Feedback
ToolBox
Samba Member


Joined: January 27, 2004
Posts: 3439
Location: Detroit, where they don't jack parts off my ride in the parking lot of the 7-11
ToolBox is offline 

PostPosted: Tue Jun 15, 2021 8:56 am    Post subject: Re: Brake Pedal Push Rod Vs. Master Cylinder Preload Reply with quote

62DoKaGuy wrote:
Reviving this thread to ask/confirm to what length a pushrod should be adjusted in an April ‘59 single cab. The catch is I installed this new, German single circuit master cylinder from Wolfsburg West: https://www.wolfsburgwest.com/cart/DetailsList.cfm?ID=211611011JGR.

Bentley describes the adjustment for up to April ‘59 at 61-62mm of pushrod length and for May ‘59 onwards at 59-60mm. Which is correct? I need to adjust length from where it is regardless, as it has load on it, which is putting resistance at the wheels. They’ll turn but with some effort (yes, ebrake cable adjustment needs to be confirmed as well)

I’d like to know what the adjustment should be for my situation and adjust from there, as required. Cheers.


You could use those measurements if you had bought the master from VW 45 years ago. Now you just need to set the preload to 1.0mm to 1.5mm and drive it. Might need to cut the pushrod to get the proper clerance if it can not be taken up with adjustment. I had to do this on my 59 Single.
Back to top
View user's profile Send private message Send e-mail AIM Address Gallery Classifieds Feedback
62DoKaGuy
Samba Member


Joined: May 22, 2011
Posts: 1276
Location: Surprise, AZ
62DoKaGuy is offline 

PostPosted: Tue Jun 15, 2021 12:47 pm    Post subject: Re: Brake Pedal Push Rod Vs. Master Cylinder Preload Reply with quote

ToolBox wrote:
62DoKaGuy wrote:
Reviving this thread to ask/confirm to what length a pushrod should be adjusted in an April ‘59 single cab. The catch is I installed this new, German single circuit master cylinder from Wolfsburg West: https://www.wolfsburgwest.com/cart/DetailsList.cfm?ID=211611011JGR.

Bentley describes the adjustment for up to April ‘59 at 61-62mm of pushrod length and for May ‘59 onwards at 59-60mm. Which is correct? I need to adjust length from where it is regardless, as it has load on it, which is putting resistance at the wheels. They’ll turn but with some effort (yes, ebrake cable adjustment needs to be confirmed as well)

I’d like to know what the adjustment should be for my situation and adjust from there, as required. Cheers.


You could use those measurements if you had bought the master from VW 45 years ago. Now you just need to set the preload to 1.0mm to 1.5mm and drive it. Might need to cut the pushrod to get the proper clerance if it can not be taken up with adjustment. I had to do this on my 59 Single.


Oddly, these are the answers I figured haha. Thanks, both of you, for the simple answers. Cheers.
_________________
,,Wenige Menschen denken, und doch wollen alle entscheiden.'' -der Alte Fritz
EverettB wrote:
...I went at it from both ends but going from the rear didn't seem to do anything, although I did spray some rust breaker in there...

4/62 Double Cab
5/61 Panel (sold)
4/59 Single Cab (sold)
Back to top
View user's profile Send private message Gallery Classifieds Feedback
Display posts from previous:   
Reply to topic    Forum Index -> Split Bus All times are Mountain Standard Time/Pacific Daylight Savings Time
Page: Previous  1, 2, 3  Next
Page 2 of 3

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum

About | Help! | Advertise | Donate | Premium Membership | Privacy/Terms of Use | Contact Us | Site Map
Copyright © 1996-2023, Everett Barnes. All Rights Reserved.
Not affiliated with or sponsored by Volkswagen of America | Forum powered by phpBB
Links to eBay or other vendor sites may be affiliate links where the site receives compensation.