Volkswagen Workshop Service and Repair Manuals

Note:

• ◆ Pump and valve block must not be separated from one another.

• Bracket
• ◆ Is secured to the mounting plate
• Self-locking nut, 10 Nm
• ◆ Always renew
• Rubber damper
• Self-locking nut, 25 Nm
• ◆ Always renew
• Stud, 8 Nm
• ABS hydraulic unit
• Brake pipe connection
• ◆ Hydraulic unit to front left brake caliper

• Brake pipe connection
• ◆ Hydraulic unit to rear right wheel cylinder/caliper
• Brake pipe connection
• ◆ Hydraulic unit to rear left wheel cylinder/caliper
• Brake pipe connection
• ◆ Hydraulic unit to front right brake caliper
• Control unit
• Heat shield
• Bolt, 8 Nm
• Clip
• Brake pipe
• ◆ Master brake cylinder/secondary piston circuit to hydraulic unit
• Brake pipe
• ◆ Brake master cylinder/primary piston circuit to hydraulic unit

Connecting brake pipes from tandem brake master cylinder to hydraulic unit

→ Fig.1    Vehicles with ABS

•     A -    Secondary piston circuit
•     B -    Primary piston circuit
•     1 -    Hydraulic unit to front right brake caliper
•     2 -    Hydraulic unit to rear left wheel cylinder/brake caliper
•     3 -    Hydraulic unit to rear right wheel cylinder/brake caliper
•     4 -    Hydraulic unit to front left brake caliper

→ Fig.2    Vehicles with ABS/EDL

•     A -    Secondary piston circuit
•     B -    Primary piston circuit