How to Bleed brake master cylinder after replacing brake pipe PEUGEOT 107 Hatchback (PM_, PN_)

@user_148944

03.11.2020 19:32

Member

I have a 2015 Peugeot 107 petrol. I have just replaced the long (rear to front) rear offside brake pipe. Probably lost all the fluid from the master cylinder. After replacing the brake pipe, I bled all the brakes with new brake fluid. Started the car and the brake padel went down the floor very soft. I believe I have trapped air in the master cylinder.

Who do I go about removing the air from the master cylinder? There is no proper video.

Started

03.11.20

Latest reply

13.11.20

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1288

@Promes

12.11.2020 11:55

Member

You need to expel air by pumping the brakes.
Pumping must be started from the farthest wheel.
If you have a steering wheel on the left side, then you start from the rear right wheel, then the rear left, front right, and end with the front left.
You need to drive the liquid well.
- @user_148944
  
  13.11.2020 03:32
  
  @Promes
  
  Member
  
  Thanks for the information. I tried as you said but the brake was still spongy. So craked opened the two connections from the master cylinder, pressed the brake padel, and tightened the connections. Started the car to prime the master cylinder. Repeated this a few times and this helped to expel all the air from the MC. Then I bled all the brakes as you told and this resolved the problem.
  The car has now passed its MOT.
  Thanks
  Monty