Seat Leon >> Connecting brake lines to hydraulic unit

Connecting brake lines to hydraulic unit, LHD

On the tandem master cylinder:

  1. - Primary piston circuit of brake master cylinder to hydraulic unit.
    • Markings: Ø 6 mm and union nut with short thread M 12 x 1
  2. - Secondary piston circuit of brake master cylinder to hydraulic unit.
    • Markings: Ø 6 mm and union nut with short thread M 12 x 1

Anti-lock brake system

On the hydraulic unit:

  1. - From hydraulic unit to rear right brake caliper.
    • Markings: Ø 5.25 mm and union nut with short thread M 12 x 1
  2. - From hydraulic unit to front left brake caliper.
    • Markings: Ø 5.25 mm and union nut with thread M 10 x 1
  3. - From hydraulic unit to front right brake caliper.
    • Markings: Ø 5.25 mm and union nut with short thread M 12 x 1
  4. - From hydraulic unit to rear left brake caliper.
    • Markings: Ø 5.25 mm and union nut with thread M 10 x 1
  5. - From hydraulic unit to secondary piston circuit of brake master cylinder.
    • Markings: Ø 6 mm and union nut with short thread M 12 x 1
  6. - From hydraulic unit to primary piston circuit of brake master cylinder.
    • Markings: Ø 6 mm and union nut with short thread M 12 x 1

Anti-lock brake system

Connecting brake lines to hydraulic unit, RHD

On the tandem master cylinder:

  1. - Primary piston circuit of brake master cylinder to hydraulic unit.
    • Markings: Ø 6 mm and union nut with short thread M 12 x 1
  2. - Secondary piston circuit of brake master cylinder to hydraulic unit.
    • Markings: Ø 6 mm and union nut with short thread M 12 x 1
  1. - Brake servo and brake master cylinder

Anti-lock brake system

To ABS hydraulic unit - N55- :

  1. - From hydraulic unit to rear left brake caliper.
    • Markings: Ø 5.25 mm and union nut with thread M 12 x 1
  2. - From hydraulic unit to front right brake caliper.
    • Markings: Ø 5.25 mm and union nut with short thread M 10 x 1
  3. - From hydraulic unit to front left brake caliper.
    • Markings: Ø 5.25 mm and union nut with thread M 12 x 1
  4. - From hydraulic unit to rear right brake caliper.
    • Markings: Ø 5.25 mm and union nut with short thread M 10 x 1

Anti-lock brake system

    Removing and installing ABS control unit - J104- / ABS hydraulic unit - N55-
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    Separating control unit from hydraulic unit
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