Workshop Manuals Factory service & repair Land Rover
01 Discovery Workshop Manual - 2nd Edition02 01 - INTRODUCTION03 04 - GENERAL SPECIFICATION DATA04 05 - ENGINE TUNING DATA05 07 - GENERAL FITTING REMINDERS06 09 - LUBRICANTS, FLUIDS AND CAPACITIES07 10 - MAINTENANCE08 12 - ENGINE - Tdi09 10 11 12 12 - ENGINE - V8i13 12 - ENGINE - 4.0 V814 12 - ENGINE - Mpi15 16 17 18 17 - EMISSION CONTROL19 19 - FUEL SYSTEM - Tdi20 19 - FUEL SYSTEM - MFI21 19 - FUEL SYSTEM - SFI22 19 - FUEL SYSTEM - Mpi23 19 - FUEL SYSTEM - Cruise Control24 26 - COOLING SYSTEM - Tdi25 26 - COOLING SYSTEM - V8i26 26 - COOLING SYSTEM - Mpi27 28 30 - MANIFOLD AND EXHAUST SYSTEM29 33 - CLUTCH30 37 - MANUAL GEARBOX - R38031 41 - TRANSFER GEARBOX32 44 - AUTOMATIC GEARBOX - ZF33 34 35 47 - PROPELLER SHAFTS36 51 - REAR AXLE AND FINAL DRIVE37 38 54 - FRONT AXLE AND FINAL DRIVE39 40 41 57 - STEERING42 43 44 60 - FRONT SUSPENSION45 64 - REAR SUSPENSION46 70 - BRAKES47 74 - WHEELS AND TYRES48 75 - SUPPLEMENTARY RESTRAINT SYSTEM49 76 - CHASSIS AND BODY50 51 80 - HEATING AND VENTILATION52 82 - AIR CONDITIONING53 84 - WIPERS AND WASHERS54 86 - ELECTRICAL
Land Rover 300Tdi Discovery52 · 82 - AIR CONDITIONING
52 · Heating & A/C

LEAK TEST SYSTEM

Make
Land Rover
Model
Discovery 300Tdi Discovery
Section
ADJUSTMENT › LEAK TEST SYSTEM
82 - AIR CONDITIONINGLEAK TEST SYSTEM
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82

AIR CONDITIONING

4

ADJUSTMENT

Evacuation and recharging

1. Add refrigerant oil to compressor if necessary.
2. Renew the receiver/drier.

CAUTION: When a major repair has been
carried out, a leak test should be carried
out using inert gas.

3. Connect a Refrigerant Station to the high and

low pressure servicing connections.

CAUTION: Whenever the refrigerant
system is opened, the receiver/drier must
be renewed immediately before evacuating

and recharging the system.

4. Operate the refrigerant evacuation system

according to the manufacturer’s instructions.

NOTE: If the vacuum reading is below
700mmHg after 15 minutes, suspect a leak
in the system. Partially recharge the

system and check for leaks using an electronic
leak tester. Check suction lines first, then run the
compressor for 5 minutes and then check the high
pressure lines.

CAUTION: The system must be evacuated
immediately before recharging
commences. Delay between evacuation

and recharging is not permitted.

5. Operate the refrigerant recharging system

according to the manufacturer’s instructions:-

Refrigerant required to charge system:
Without rear air conditioning = 0.90kg (32 fl/oz)
With rear air conditioning = 1.15kg (40 fl/oz)

6. If the full charge has not been accepted by the

system, start the engine and run it at 1500
rev/min for a minimum of 2 minutes.
Switch on the air conditioning system, open the
car windows, set the temperature control to cold
and switch the blower to maximum speed.

7. Consult Refrigerant Station Manual for correct

procedure to complete the charge.

8. Carry out the air conditioning system

performance test.

LEAK TEST SYSTEM

The following instructions refer to an electronic type
Refrigerant Leak Detector for use with R134a, which
are the safest and most sensitive.

CAUTION: When a major repair has been
carried out, a leak test should be carried
out using an inert gas (see below).

1. Place the vehicle in a well ventilated area but

free from draughts, as leakage from the system
could be dissipated without detection.

2. Follow the instructions issued by the

manufacturer of the particular leak detector
being used.

3. Commence searching for leaks by passing the

detector probe around all joints and components,
refrigerant gas is heavier than air.

4. Insert the probe into an air outlet of the

evaporator or into the evaporator drain tube.
Switch the air conditioning blower on and off at
intervals of ten seconds. Any leaking refrigerant
will be gathered in by the blower and detected.

5. Insert the probe between the magnetic clutch

and compressor to check the shaft seal for
leaks.

6. Check all service valve connections, valve plate,

head and base plate joints and back seal plate.

7. Check the condenser for leaks at the pipe

unions.

8. If any leaks are found, the system must be

discharged before rectification.

9. Rectify any leaks and recheck for leaks during

evacuation prior to charging.

Leak test using inert gas

Use Nitrogen or Helium gas.

1. Connect gas line to recharging station.
2. Pressurise system to 3 bar.
3. Carry out leak test as above.

Parts & tools for this job Staging For Land Rover Discovery

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