Firm Pedal After Bleeding - Impala Tech
Brakes & Suspension Conversion Questions & more

 
LinkBack Thread Tools
post #1 of 6 (permalink) Old 04-06-2020, 03:07 AM Thread Starter
Member
 
Join Date: Oct 2013
Location: France
Posts: 92
 
Garage
Hello everybody,

I need help please, I've installed new Wilwood 4 pistons 12.19" in front with 15/16" master cylinder and proportioning valve from wilwood too.

It's manual brakes configuration.

I bled from rear passenger drum to front driver caliper. I think I'm OK but the problem is that the pedal brake has little free move and becomes hard. Front calipers block wheels and and don't come came totally back, so it's hard to spin wheels.
The rear drums don't brake at all. I turn the proportioning valve in 2 ways, same problem. Brake shoes and cylinders are new. Maybe a bad setting?

The pedal rod is to the 2nd highest hole like before (4 drums manual).

Thank you for your help, Charly.

'66 Impala

Last edited by Charly; 04-06-2020 at 03:49 AM.
Charly is offline  
Sponsored Links
Advertisement
 
post #2 of 6 (permalink) Old 04-06-2020, 06:50 AM Thread Starter
Member
 
Join Date: Oct 2013
Location: France
Posts: 92
 
Garage
I maybe solve my problem.
I bled one more time rear side of the master cylinder, lot of air inside again.
Reconnect rear brakes line and bled again wheel cylinders. Good flow a little bit of air and surprise a good pedal feeling.

No more free pedal travel and rear drums working!

But I don't know why front brake kept pressure when hard push on brake pedal.
So I open a little bit bleeder on caliper, let the overflow and close the bleeder and the wheel can spins free.

'66 Impala
Charly is offline  
post #3 of 6 (permalink) Old 04-06-2020, 12:23 PM
Moderator
 
Join Date: Jul 2009
Location: Canada
Posts: 1,487
 
You used a disc/drum master, correct?

Two doors, four doors, wagons, and ragtops.
jayoldschool is offline  
 
post #4 of 6 (permalink) Old 04-06-2020, 01:14 PM Thread Starter
Member
 
Join Date: Oct 2013
Location: France
Posts: 92
 
Garage
Yes exactly.

I maybe solved my second problem, the pedal rod was too long, so the master cylinder didn't back correctly, and front brakes stay blocked.

Now the pedal is smoother, I certainly need to set rear drums and set the proportioning valve.

'66 Impala
Charly is offline  
post #5 of 6 (permalink) Old 04-09-2020, 08:39 AM
Senior Member
 
Join Date: Sep 2019
Location: Jackson, MO
Posts: 108
 
you adjusted the pedal under the dash? Or the pushrod in the booster/master?

Ted
brickwhite is offline  
post #6 of 6 (permalink) Old 04-10-2020, 03:52 PM Thread Starter
Member
 
Join Date: Oct 2013
Location: France
Posts: 92
 
Garage
I adjusted the rod under the dash, the rod and travel pedal are shorter.
My mistake was to set a longer pushrod (longer than the original) and the pedal was too hight and the piston in the master cylinder hadn't a full travel (didn't came completely back).
Sorry if it isn't clear but it's difficult to translate for me.

'66 Impala
Charly is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Impala Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome