Hydraulic Control Assembly - Antilock Brakes: Description and Operation

Brake Lines, Attaching to Hydraulic Unit

On Tandem Master Brake Cylinder






A Primary piston circuit of master brake cylinder to hydraulic unit
Identification: 8.5 mm or 6 mm and tube fitting with thread M12 x 1
B Secondary piston circuit of master brake cylinder to hydraulic unit
Identification: 8.5 mm or 6 mm and tube fitting with thread M12 x 1
1 Hydraulic unit to left front brake caliper
3 Hydraulic control unit to left rear brake caliper
4 Hydraulic control unit to right rear brake caliper

On Hydraulic Unit






1 Hydraulic unit to left front brake caliper
Identification: 5.25 mm diameter and tube fitting with shorter thread M12 x 1
2 Hydraulic control unit to right rear brake caliper
Identification: 5.25 mm diameter and tube fitting with M10 x 1 thread
3 Hydraulic control unit to left rear brake caliper
Identification: 5.25 mm diameter and tube fitting with shorter thread M12 x 1
4 Hydraulic unit to right front brake caliper
Identification: 5.25 mm diameter and tube fitting with M10 x 1 thread
5 Hydraulic unit to primary piston circuit of master brake cylinder
Identification: 8.5 mm or 6 mm and tube fitting with longer thread M12 x 1
6 Hydraulic unit to master cylinder secondary piston circuit
Identification: 8.5 mm or 6 mm and tube fitting with longer thread M12 x 1