Installing Hydraulic Unit

Information 

• When fitting the hydraulic connections, leave electric plug connections connected to the control units for as long as possible. This prevents the electric plug connections from being splashed with brake fluid or water. 
• Wipe off damp electric plug connections before disconnecting them. Use appropriate protection for electric plug connections if necessary. 
• Brake fluid on electric contacts (even thinned brake fluid) causes corrosion and can result in faults in the system. 
• Do not bend the brake lines in the hydraulic unit area. 
• Clean connection points of the brake lines, but not with cleaning agents. 
• Rinse off any brake fluid emerging thoroughly with water. 

Information 

Always switch off the ignition when working on the hydraulic unit!

1. Installation is performed in reverse order. Pay particular attention to the following:

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.

   Return line (PHEV only) 

   1. 1.1 Only for PHEV vehicles:  Replace copper sealing -3-  and elastomer sealing -4-  .
   2. 1.2 Only for PHEV vehicles:  Cap screw for return line to hydraulic unit:

      > Tightening torque 40 Nm (30 ftlb.) 

   3. 1.3  Union nuts securing supply line to hydraulic unit:

      > Tightening torque 16 Nm (12 ftlb.) 

   4. 1.4  Union nuts securing brake lines to hydraulic unit:

      > Tightening torque 14 Nm (10.5 ftlb.)