Brake Servo Failed
Discussion
Think this one might have had it! Mighty glad it deposited huge quantities of brake fluid in the footwell before I got new carpets etc.
Removing the master cyl, servo and pedal box isn't much fun. For future info, releasing the pipes from the connection block on the bulk head, undoing the master cylinder bolts and releasing the pedal box allows the master cylinder and pipes out through the top with the reservoir removed.Detatched throttle pedal and pivot spindle from pedal box, also bonnet cable. Split servo from pedal box and the pedal box will come out without removing steering column. It's much easier to undo the pipe connections to master cylinder in the vice as mine were brass and very tight.
I knew there was a lot of fluid in the servo by dipsticking the servo through the vacuum hole. Scarily I poked around the servo rusty bits a little and the two halves separated.
Removing the master cyl, servo and pedal box isn't much fun. For future info, releasing the pipes from the connection block on the bulk head, undoing the master cylinder bolts and releasing the pedal box allows the master cylinder and pipes out through the top with the reservoir removed.Detatched throttle pedal and pivot spindle from pedal box, also bonnet cable. Split servo from pedal box and the pedal box will come out without removing steering column. It's much easier to undo the pipe connections to master cylinder in the vice as mine were brass and very tight.
I knew there was a lot of fluid in the servo by dipsticking the servo through the vacuum hole. Scarily I poked around the servo rusty bits a little and the two halves separated.
RobXjcoupe said:
N7GTX said:
RobXjcoupe said:
N7GTX said:
RobXjcoupe said:
The brake master cylinder failed on my Griff about 3 years ago, servo wasn't too bad, with a bit of surface rust. The master cylinder was of fiesta 1.8 diesel spec though. Was wondering if the slightly later fiesta mk4/5 have the same servo as the mk3 fiesta. Same basic car?
Looked this up. The Mk3 Fiesta had an 8" servo and the Mk4 has a 9" servo. So unless someone has actually fitted one it doesn't look good. You can get an idea of the condition of the brake servo by opening the driver's door, getting down on your knees and with a torch look towards and behind the accelerator pedal. About a third of the servo is clearly visible behind the accelerator pedal on the outside and if yours was as bad as those in this thread you would probably see it here. You can also check for any leaks from both the brake and clutch master cylinders while you're at it.
Then get someone to help you get up off your knees.....
That picture is my servo and pedal box from 3 years ago. My servo had a bit of surface rust but nothing to worry about. The master cylinder failed hence the strip down
A quick check of the servo is to pull out the vacuum pipe and to dipstick the inside of the servo to check for any internal brake fluid. If you are planning to remove your servo then I would advise sucking excess fluid out through this hole first, I didn't and it deposited about a pint of brake fluid in the footwell as I was removing it, not pleasant!
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