Brake bleeding again
Thread Starter
Intermediate
Joined: Nov 2001
Posts: 49
Likes: 0
From: Cape Cod, Ma.
Brake bleeding again
Hi,
I did a search and could not find an answer to my brake bleeding question. I have a 91 cab c2 and would like to change the brake fluid as It has not been changed at least since 1996. I have the new pressure bleeder everyone suggested and 2 cans of ATE blue. I know the sequence of Right/rear...left/rear...right front..ect. But what about the master cylinder and more importantly the antilock gizmo in the trunk ? It seems it too will need to be bled also.
Adrain, I am almost at a point where I can answer some questions posted here with all your help. This should allow you more time to get your new book out so I can have my very own copy. Truthfully thank you so much for all the help. You mention often about aircraft..are you in the business ? I fly the Airbus A320 which helps support my 2 teenagers , and my newly acquired 964.
Thanks again
Tom
Cape Cod
I did a search and could not find an answer to my brake bleeding question. I have a 91 cab c2 and would like to change the brake fluid as It has not been changed at least since 1996. I have the new pressure bleeder everyone suggested and 2 cans of ATE blue. I know the sequence of Right/rear...left/rear...right front..ect. But what about the master cylinder and more importantly the antilock gizmo in the trunk ? It seems it too will need to be bled also.
Adrain, I am almost at a point where I can answer some questions posted here with all your help. This should allow you more time to get your new book out so I can have my very own copy. Truthfully thank you so much for all the help. You mention often about aircraft..are you in the business ? I fly the Airbus A320 which helps support my 2 teenagers , and my newly acquired 964.
Thanks again
Tom
Cape Cod
Addict
Lead Rennlist
Technical Advisor
Rennlist
Lifetime Member
Lead Rennlist
Technical Advisor
Rennlist
Lifetime Member
Joined: May 2001
Posts: 8,027
Likes: 17
From: Parafield Gardens
Dear Tom,
When bleeding the brakes or replacing the fluid or both, on a standard C2 (vacuum assisted boost) there are two very important tips to remember which will hopefully aviod any problems.
1/. Ensure power is off completely. As long as the power is off, the ABS solenoid will not be activated and the ABS circuit will remain isolated. No bleeding required but you will not be able to replace the fluid trapped in this part of the brake circuit.
2/. Ensure you NEVER allow the brake fluid level to drop below minimum at all times. You really should have somebody helping you in this job. You replace the fluid by drawing off the old whilst instantly replacing it with new. A good tip is to top up the fluid with new stuff before you even start.
3/. Do not forget the clutch slave cylinder likes a bleed as well. A bad bleed often leads to a few problems when you use the clutch as well as the brakes.
Of course remember that your brake circuits are low pressure ones not high pressure like on the C4s, Turbolooks, Speedsters and the Turbos.
I work as the Engineering Manager for a very small airline called Rheintalflug Vorarlberg Luftfahrt GmbH, which is now owned by Austrian Airlines.
This bulletin board gives me break from my book and other things I have to deal with.
Ciao,
Adrian
911C4
When bleeding the brakes or replacing the fluid or both, on a standard C2 (vacuum assisted boost) there are two very important tips to remember which will hopefully aviod any problems.
1/. Ensure power is off completely. As long as the power is off, the ABS solenoid will not be activated and the ABS circuit will remain isolated. No bleeding required but you will not be able to replace the fluid trapped in this part of the brake circuit.
2/. Ensure you NEVER allow the brake fluid level to drop below minimum at all times. You really should have somebody helping you in this job. You replace the fluid by drawing off the old whilst instantly replacing it with new. A good tip is to top up the fluid with new stuff before you even start.
3/. Do not forget the clutch slave cylinder likes a bleed as well. A bad bleed often leads to a few problems when you use the clutch as well as the brakes.
Of course remember that your brake circuits are low pressure ones not high pressure like on the C4s, Turbolooks, Speedsters and the Turbos.
I work as the Engineering Manager for a very small airline called Rheintalflug Vorarlberg Luftfahrt GmbH, which is now owned by Austrian Airlines.
This bulletin board gives me break from my book and other things I have to deal with.
Ciao,
Adrian
911C4
Technical Specialist
Rennlist
Lifetime Member
Rennlist
Lifetime Member
Joined: May 2001
Posts: 5,865
Likes: 26
From: TX
<STRONG>2/. Ensure you NEVER allow the brake fluid level to drop below minimum at all times. You really should have somebody helping you in this job. You replace the fluid by drawing off the old whilst instantly replacing it with new. A good tip is to top up the fluid with new stuff before you even start.</STRONG>
Addict
Lead Rennlist
Technical Advisor
Rennlist
Lifetime Member
Lead Rennlist
Technical Advisor
Rennlist
Lifetime Member
Joined: May 2001
Posts: 8,027
Likes: 17
From: Parafield Gardens
Dear Bill,
Maybe right but I always say it just in case. I know of a couple of people who drained the old fluid first, then hooked up the pressure bleeder for the new fluid,
Ciao,
Adrian
911C4
PS: Others may also be interested so giving the whole story is best imho.
Maybe right but I always say it just in case. I know of a couple of people who drained the old fluid first, then hooked up the pressure bleeder for the new fluid,
Ciao,
Adrian
911C4
PS: Others may also be interested so giving the whole story is best imho.
Advanced
Joined: Oct 2001
Posts: 63
Likes: 1
what is the best way of adapting a pressure bleeder to the brake fluid reservoir? Ideally there would be a cap fitted with a fitting to attach the bleeder to.
Is there a generic cap available for this? I hat to go thru the trouble of buying a reservoir cap and then modifying it.
Is there a generic cap available for this? I hat to go thru the trouble of buying a reservoir cap and then modifying it.
Technical Specialist
Rennlist
Lifetime Member
Rennlist
Lifetime Member
Joined: May 2001
Posts: 5,865
Likes: 26
From: TX
<STRONG>what is the best way of adapting a pressure bleeder to the brake fluid reservoir? Ideally there would be a cap fitted with a fitting to attach the bleeder to. </STRONG>
