Fitting instructions for Remote Vacuum Servo Units Types 6 and 7

General fitting instructions

To ensure correct installation of the AP Braking remote vacuum servo unit, thoroughly read and adhere to the fitting instructions prior to carrying out any work on the vehicle. Introduction The vacuum servo unit is incorporated into the hydraulic braking system, remote from the master cylinder, as an intermediate stage operating between the master cylinder and the brake assemblies. The two main parts of the servo unit consist of the vacuum servo mechanism and the hydraulic slave cylinder assembly.

These component parts are bolted together so that the slave cylinder piston is in line with, and is operated by, the servo push rod. A plastic no-return valve is fitted into the vacuum shell and an integral air cleaner is incorporated to prevent foreign matter entering the air control valve chamber. The servo unit is designed to give no assistance with very light brake application. In the absence of servo assistance due to loss of vacuum, an unres...