Volkswagen Workshop Service and Repair Manuals

ABS - ITT Mark 20 GI/ Left-hand drive

The brake servo boost is produced by vacuum pressure.

→ Distinguishing features:

• ◆ 10" Brake servo
• ◆ 8 Valve dome (the protective sleeves for the valves will be visible when the control unit is separated from the hydraulic unit)

ABS/EDL - ITT Mark 20 GI/ Left-hand drive

The brake servo boost is produced by vacuum pressure.

→ Distinguishing features:

• ◆ 10" Brake servo -1-
• ◆ 10 Valve dome (the protective sleeves for the valves will be visible when the control unit is separated from the hydraulic unit)
• ◆ Valve block is longer for ABS/EDL with 10 valve domes.

ABS - ITT Mark 20 GI/ Right-hand drive

The brake servo boost is produced by vacuum pressure.

→ Distinguishing features:

• ◆ 9" Brake servo
• ◆ 8 Valve dome (the protective sleeves for the valves will be visible when the control unit is separated from the hydraulic unit)

•      A -     Brake pipe between master cylinder/secondary piston circuit and hydraulic unit
•      B -     Brake pipe between master cylinder/primary piston circuit and hydraulic unit
•      1 -     Hydraulic unit to front right brake caliper
•      2 -     Hydraulic unit to rear left brake caliper
•      3 -     Hydraulic unit to rear right brake caliper
•      4 -     Hydraulic unit to front left brake caliper

ABS/EDL - ITT Mark 20 GI/ Right-hand drive

The brake servo boost is produced by vacuum pressure.

→ Distinguishing features:

• ◆ 9" Brake servo
• ◆ 10 Valve dome (the protective sleeves for the valves will be visible when the control unit is separated from the hydraulic unit)
• ◆ Valve block is longer for ABS/EDL with 10 valve domes.

•      A -     Brake pipe between master cylinder/secondary piston circuit and hydraulic unit
•      B -     Brake pipe between master cylinder/primary piston circuit and hydraulic unit