• When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.

1970 road runner brake line help

Jimclo2002

Well-Known Member
Local time
5:59 PM
Joined
Mar 10, 2014
Messages
270
Reaction score
11
Location
Lewes, Delaware
I could use some of your Mopar guidance. I believe I'm have a issue with the correct brake line location connections. I have attached a file with a photo of the Portion Value and the Master cylinder. i labeled all the ports. For some reason I'm not getting the draw of brake fluid while trying to bleed brakes. Can you write next to where the corresponding connections go?

A Portion Value ________________________________?
B Portion Value_________________________________?
C Portion Value_________________________________?
D Portion Value_________________________________?
E Portion Value__________________________________?
Port 1 Master Cylinder____________________________?
Port 2 master Cylinder____________________________?

Each wheel cylinder , all brake lines power booster and master cylinder are new. the Portion Valve was removed and cleaned.

View attachment 336377

image.jpg
 
Assuming you have disc up front, drums in the rear...right?
Look at your master cylinder...on the disc/drum setup, largest 'pot' feeds the disc brakes.

A Portion Value ________________________________?
- Goes to the portioning valve, then to rear brakes.
(Tees at the rear axle, to feed each side)
B Portion Value_________________________________?
- From MC port 1
C Portion Value_________________________________?
- From MC port 2 (if I'm looking at it right), and feeds to both D and E, one to each front disc brake.
D Portion Value_________________________________?
E Portion Value__________________________________?
Port 1 Master Cylinder____________________________rear brakes
Port 2 master Cylinder____________________________front brakes
 
Assuming you have disc up front, drums in the rear...right?
Look at your master cylinder...on the disc/drum setup, largest 'pot' feeds the disc brakes.

A Portion Value ________________________________?
- Goes to the portioning valve, then to rear brakes.
(Tees at the rear axle, to feed each side)
B Portion Value_________________________________?
- From MC port 1
C Portion Value_________________________________?
- From MC port 2 (if I'm looking at it right), and feeds to both D and E, one to each front disc brake.
D Portion Value_________________________________?
E Portion Value__________________________________?
Port 1 Master Cylinder____________________________rear brakes
Port 2 master Cylinder____________________________front brakes
*********************************************************************************************************************************************************************************************
The 70 roadrunner has 11 inch drum front and rear
 
*********************************************************************************************************************************************************************************************
The 70 roadrunner has 11 inch drum front and rear.
Also right now C is going to the drivers wheel
 
Ah...okay. Not sure on a 70 model...could be other valves involved. Also not positive on the master. Most all drum masters I've seen that are split have same size pots. Just disc/drum using different size pots.
Best bet is a service manual, if the brakes are stock.

Maybe someone running a 70 will chime in...
 
Auto Transport Service
Back
Top