SEAT Workshop Service and Repair Manuals

Removing and installing brake master cylinder

Special tools and workshop equipment required

t	Sealing tool -T10249-

t	Torque wrench -V.A.G 1331-

t	Brake filling and bleeding equipment -VAS 5234-

Removing: –  Note or request radio code on vehicles with coded radio if necessary. –  Remove battery → Electrical system; Rep. gr.27. –  Remove air cleaner housing → 3-Cyl. injection engine, belt drive (4-valves); Rep. gr.24. –  Place sufficient lint-free cloths in area of engine and gearbox. –  Draw off as much brake fluid as possible from brake fluid reservoir using brake filling and bleeding equipment -VAS 5234-. Only for vehicles with air conditioning system:

–  Disconnect connector -2- from high-pressure sender -G65--1-. All vehicles (continued): –  Disconnect connector -A- from brake fluid level warning contact -F34-. –  Disconnect connector -B- from brake light switch -F-.

–  Then unclip wiring harness from brake master cylinder.

–  Disconnect return hose -C- for clutch master cylinder from brake fluid reservoir. –  Seal return hose -2- for clutch master cylinder -3- with sealing tool -T10249--1- or engine bung set -VAS 6122-. –  Tie return hose -2- in place above.

–  Unscrew torx bolt -1- from retaining lug of brake fluid reservoir and from brake master cylinder. –  Pull brake fluid reservoir -2- upwards -arrow- out of brake master cylinder.

–  Mark and unscrew brake lines from brake master cylinder -1-. –  Unscrew nuts -2- from brake master cylinder. –  Carefully remove brake master cylinder from brake servo. –  Remove brake light switch -F-. Installing: –  Installation is carried out in reverse order. Observe the following points when installing: –  When assembling brake master cylinder with brake servo, make sure plunger rod and seal are properly positioned in brake master cylinder. –  Bleed brake system → Chapter.

Tightening torques:
Brake master cylinder to brake servo t  Use new nuts!	23 Nm
Brake lines to brake master cylinder	14 Nm
Torx bolt for brake fluid reservoir	8 Nm
Torx bolt for brake light switch to brake master cylinder	7 Nm