Volkswagen Golf Service & Repair Manual: Instructions for checking

Volkswagen Golf Service & Repair Manual / Brake system / Brakes, hydraulics, regulator, servo / Vacuum system / Instructions for checking

The following instructions are intended to help you find the causes of problems effectively and objectively in the event of complaints about the brake servo or in the event of a so-called »hard brake pedal«.

This check relates to the following components:

Brake servo

Oil seal between brake master cylinder and brake servo.

Non-return valve

Vacuum hoses with connectors

Vacuum pump (if fitted)

When evaluating the measuring results, bear in mind that they will be influenced by the geographical location. The higher your location is above sea level, the lower the air pressure will be.

Before checking the vacuum system, please take note of the following prerequisites for checking:

Visual inspection of all vacuum hoses for damage (e.g. cracks or marten bite) and to check that they are correctly and firmly attached

Ensure cleanliness when working on vacuum system

Before starting work, clean engine compartment if necessary

Removing and installing vacuum sender -G608

Note The vacuum sender -G608- is only installed in selected petrol engines. Removing ...

Connecting vacuum gauge for brake servo -VAS 6721-

Special tools and workshop equipment required Vacuum gauge for brake servo -VAS 6721- ...

Other materials:

Refrigerant machine oil
Refrigerant machine oil is miscible (approx. 20%–40% depending on the type of air conditioner compressor and the quantity of refrigerant) in the refrigerant. It circulates continuously in the circuit and lubricates the moving parts. ...

Overview of fitting locations - components not located in passenger compartment, Golf Variant RHD
1 - Exhaust ventilation for passenger compartment Checking → Chapter Removing and installing → Chapter 2 - Humidity sender for air conditioning system -G260- Check v ...

Switch and sender in refrigerant circuit and related connections
Note See vehicle-specific refrigerant circuit for switching pressures, removing and fitting switches, together with switch arrangement and versions. → Rep. gr.87 ...