Volkswagen Golf / Golf GTI / Jetta. Manual — part 993

87-172

Fig. 5

Clutch coil, installing

- Install coil on compressor.

- Position pin -A- in recess

Notes:

Fig. 6

Clutch plate gap,
checking

- Check gap with feeler gauge.

Gap: 0.3 - 0.6 mm (0.0118 -

0.0236 in.)

Gap must be within tolerance

around entire circumference.

If gap is outside tolerance range,

remove clutch plate and adjust
gap by adding or removing shims

item 3 ,

Page 87-168

.

Compressor bracket, removing and installing

13/2/2005

Select a topic

General information for A/C system

Introduction

Other reference material

Principles of air conditioning systems

Vapor pressure table for refrigerant R134a

Refrigerant R134a

Characteristics of refrigerant R134a

Refrigerant oil

Comfort

Mode of operation of air conditioning system

General work safety

Safety measures for working on vehicles with air conditioning system
and for handling refrigerant R134a

Basic rules for working on refrigerant circuit

General information on refrigerant circuit

Components of refrigerant circuit

Design of refrigerant circuit

Connections for quick-release coupling on refrigerant circuit

Switches and sensors on refrigerant circuit and corresponding
connections

Electrical components not installed on the refrigerant circuit

Pressures and temperatures in refrigerant circuit

Refrigerant circuit with expansion valve

Refrigerant circuit with restrictor and reservoir

Tests and measurements performed using pressure gauge

Service and recycling units

Refrigerant circuit repair information

Laws and regulations

Laws and regulations

Recycling and refuse law

R12 refrigerant circuit, converting to R134a refrigerant circuit and
servicing (retrofit)

Keeping refrigerant records

Refrigerant circuit

Important repair notes on air conditioning systems

Refrigerant circuits, converting from R12 refrigerant to R134a
refrigerant

Working with the service station

Service station, connecting for measurement and testing

Refrigerant circuit, discharging using service station

Refrigerant circuit, evacuating using service station

Refrigerant circuit, charging using service station

Refrigerant, transferring to charging cylinder of service station

Service station, draining

Refrigerant circuit, cleaning (flushing) with compressed air and
nitrogen.

Refrigerant circuit, tracing leaks using leak detector V.A.G 1796

Refrigerant R134a - Servicing

13/2/2005

Refrigerant circuit, tracing leaks using leak detection system VAS
6196

Complaints

Possible complaints at refrigerant circuit

Service station, connecting

On vehicles with connection on low and high-pressure side of
refrigerant circuit

Pressures, checking on vehicles

Pressures in refrigerant circuit, checking (using service station)

Restrictor and reservoir (with internally regulated compressor),
checking

Expansion valve and receiver (with internally regulated compressor),
checking

Expansion valve and receiver (without internally regulated
compressor), checking

Restrictor, reservoir and A/C Compressor Regulator Valve N280
(externally regulated compressor), checking

Expansion valve, receiver and A/C Compressor Regulator Valve
N280 (externally regulated compressor), checking

Components, replacing

Components (except compressor, reservoir or receiver) leaking or
damaged

A/C compressor. replacing

Receiver or reservoir and restrictor, replacing

Testing equipment and tools

List of testing equipment, tools and materials

Glossary

Refrigerant R134a - Servicing

13/2/2005

00 - 1

General information for A/C system

Introduction

The purpose of this Repair Manual is to provide foremen
and mechanics with the basic knowledge needed to ensure
expert working.

Note:

- Only the careful study of this documentation and practical
implementation of the information contained can guarantee
expertise in the field of motor vehicle air conditioning
systems.

It should also be available for presentation to the
responsible supervisory agency on request.

Other reference material

- Technical Service Handbook outlining action to be taken
to rectify current problems

- Repair Manual for model-specific servicing work

- Catalog of Electrical Wiring Diagrams, Troubleshooting
Component Locations

- Self study programs

- Video programs for in-dealership training

- Catalog of Special tools / Workshop test binder

- Service Organization Volume 1 additional equipment

Principles of air conditioning systems

Physical principles:

The four known states of water also apply to air
conditioning system refrigerants.

1. gaseous (invisible)
2. vapor
3. liquid
4. solid

General information for A/C system

13/2/2005