Dual Master Cylinder Conversion |
Post Reply | Page <1234> |
Author | |
garage gnome
Member Sponsor Member Joined: 12 Jan. 2011 Location: Western MA Status: Offline Points: 2834 |
Post Options
Thanks(0)
|
I have drums all around and it stops excellent without one. I asked the same question over on the ECJ5 board and they said to run it without one and see.
|
|
Nate
1953 3A, 1949 3A, 1947 2A, 1918 IHC Titan 10-20, 1905 IHC Famous, other hit n misses |
|
tfrazer
Member Joined: 31 Oct. 2011 Location: Montana Status: Offline Points: 335 |
Post Options
Thanks(0)
|
So i am looking at putting a duel master in a 46 2a and running 4- 11 inch drums... I have seen alot of diffrent mc's suggested here.. I was planning on buying herms braket and finding a smaller MC. Since I live along way from a parts store.. pretty much going to have to order everything online unfortunately. I saw Ralf had a model number posted for drum/disk... anyone know one for 4 drums?? or with the drum /disk work? |
|
Ted
46 CJ2a |
|
ralf
Member Sponsor Member x 2 Joined: 06 May 2008 Location: Fayetteville WV Status: Offline Points: 4861 |
Post Options
Thanks(0)
|
The one I posted will work fine.
|
|
1947 CJ2A
1948 CJ2A 1953 Ford NAA Golden Jubilee Tractor 1941 J-3 Cub 1957 Farmall Cub Low Boy tractor 1942 Clarktor WW2 tug |
|
tfrazer
Member Joined: 31 Oct. 2011 Location: Montana Status: Offline Points: 335 |
Post Options
Thanks(0)
|
thanks a ton!
|
|
Ted
46 CJ2a |
|
tfrazer
Member Joined: 31 Oct. 2011 Location: Montana Status: Offline Points: 335 |
Post Options
Thanks(0)
|
So I just recived waclks Kit... He says the plunger needs to be modified but he dosent say how
. It seems like it would fit looking at it.
|
|
Ted
46 CJ2a |
|
scuba82
Member Joined: 12 July 2011 Location: Honolulu, HI Status: Offline Points: 201 |
Post Options
Thanks(0)
|
I'm having a little trouble with Herms kit. I've run all new lines, bled them and it doesn't have much pressure and I can not even come close to locking the tires up. I've re-bled and nothing. Does it matter which port (front or rear) on the MC I run to the front or back? I currently have the rear MC port to the rear brakes and the front port to the fronts. My clutch pedal also does't like to release when Im on the brakes hard, its like the shaft is torquing... wondering if any of you all have had similar situations with Herm's kit? Thanks everybody.
|
|
scuba82
|
|
garage gnome
Member Sponsor Member Joined: 12 Jan. 2011 Location: Western MA Status: Offline Points: 2834 |
Post Options
Thanks(0)
|
The Dual MC should marked which one goes to the front and which one goes to the rear. Did you bench bleed the MC? I bench bled mine and put it in and had brakes immediately
|
|
Nate
1953 3A, 1949 3A, 1947 2A, 1918 IHC Titan 10-20, 1905 IHC Famous, other hit n misses |
|
Keith.Tracy
Member Joined: 27 Sep. 2006 Location: Hydes, MD Status: Offline Points: 573 |
Post Options
Thanks(0)
|
the smaller res is for the rear. this would mean you have it backwards
|
|
scuba82
Member Joined: 12 July 2011 Location: Honolulu, HI Status: Offline Points: 201 |
Post Options
Thanks(0)
|
I did bench bleed prior to installing it into the bracket. I also had to trim the original plunger. Do you think I may have ground too much and the pedal isn't pushing the plunger far enough?I have no leaks and bled the lines thoroughly...It's like a mystery!!! I did just purchase a 82-83 Ford Fairmont M/C that I saw mentioned in this thread...should be coming in the mail this week, I'm going to try that to see if I make some progress!
On Herm's MC, the reservoirs are the same size I noticed. I'll change it back (rear port to rear wheels and front to front) bleed it one more time and test it...if not better, I'll try the Fairmont MC Thanks for the advice guys, keeping my fingers crossed!
|
|
scuba82
|
|
mderick25
Member Joined: 02 Nov. 2005 Location: Rocky Mountains Status: Offline Points: 142 |
Post Options
Thanks(0)
|
I had a similar issue when upgrading to a dual res MC.
What I found was that I did have a small air leak in one the lines. It never leaked just never let me bleed it correctly.
I used speed bleeders, and went over all my line connections ensuring that they were totally tight. I also opted for a banjo connection (90 degree) off the MC.
Once I did all this, I was able to get a very hard pedal.
|
|
dortoh
Member Joined: 19 May 2009 Location: Palmer ak Status: Offline Points: 3 |
Post Options
Thanks(0)
|
Gale,
What is the master cylinder you used off of? It looks like both the front and back chambers are the same size and would work best for those of us using drum brakes? Thanks Lenard Edited by dortoh - 08 Apr. 2012 at 9:04pm |
|
ttom
Member Joined: 27 Nov. 2012 Location: Mississippi Status: Offline Points: 1 |
Post Options
Thanks(0)
|
I just received the commando MC. What existing brackets did you use?I have a 46 overland cj2a and there is no brkt in sight. The original MC bolts through it to the frame. Did you purchase another brkt?If so where From (pardon my red neck lingo)? Did you purchase the 90 degree banjo bolts? I appreciate your input. TTom
|
|
WRMorrison
Member Joined: 28 Jan. 2006 Location: Mesa, AZ Status: Offline Points: 421 |
Post Options
Thanks(0)
|
Old thread, I know, but thanks for the heads-up on where to get the banjo bolts and fittings Ralf. I just called and got a couple on the way.
For those interested (might turn up in a future search), a '72 Commando master cylinder (with drums on both ends) has both ports threaded 1/2-20. The part number for 2 banjo bolts, 2 fittings and 4 crush washers that mate to standard 3/16" brake line is PN 3105 at purechoicemotorsports.com. They're $30 + shipping (and tax, if applicable) for the set: (It says it's for a Wilwood master cylinder, but the bolts/fittings are the same) -WRM
Edited by WRMorrison - 09 May 2013 at 6:40pm |
|
If you're a SolidWorks user, here's a link to my publicly available models: My Models (click on "projects")
|
|
Daniel_Buck
Member Joined: 01 Apr. 2012 Location: Gilroy Status: Offline Points: 1200 |
Post Options
Thanks(0)
|
I'm thinking about going with the R&P dual MC, anyone done this? Apparently it's completely bolt on, no cutting or needing to make brackets. And has a remote filler for the MC, which would be nice!
http://shop.rp4wd.com/product/willys-jeep-cj-dual-res-master-cylinder-conversion-kit |
|
2a #40500
|
|
WRMorrison
Member Joined: 28 Jan. 2006 Location: Mesa, AZ Status: Offline Points: 421 |
Post Options
Thanks(0)
|
Very interesting Daniel; never heard of or seen that one...the remote filler would be nice!
-WRM
|
|
If you're a SolidWorks user, here's a link to my publicly available models: My Models (click on "projects")
|
|
Mike S
Member Joined: 20 May 2006 Location: West Coast Status: Offline Points: 2318 |
Post Options
Thanks(0)
|
Has anyone used the R&P dual MC kit? On their website it looks like it would be a complete solution for my '47 with existing 11" drums. The remote reservoir is a very useful idea.
It stopped OK with the stock MC, but might as well upgrade while I have it all in pieces.
|
|
'47 CJ2A -- #114542
Warn FF D41 rear Lock-Right locker 11" drum brakes Dual master cylinder T90C Transmission 16 X 6 Jeep truck wheels Cooper STT Pro tires |
|
Daniel_Buck
Member Joined: 01 Apr. 2012 Location: Gilroy Status: Offline Points: 1200 |
Post Options
Thanks(0)
|
Does upgrading the MC actually make the braking any different? I was under the impression it was more for safety, incase one of the lines blows or leaks, you still have the other 1/2 working?
|
|
2a #40500
|
|
Mike S
Member Joined: 20 May 2006 Location: West Coast Status: Offline Points: 2318 |
Post Options
Thanks(0)
|
The piston will be larger. More volume, thus more fluid.
I believe that the wheel cylinders on the 11 X 2" Bendix brakes on my '47 are LARGER diameter than the OE master cylinder... But I have not measured them.
|
|
'47 CJ2A -- #114542
Warn FF D41 rear Lock-Right locker 11" drum brakes Dual master cylinder T90C Transmission 16 X 6 Jeep truck wheels Cooper STT Pro tires |
|
Post Reply | Page <1234> |
Tweet |
Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |