LAND ROVER DEFENDER 1996 Workshop Manual

AIR CONDITIONING
9
REPAIR EXPANSION VALVE - LH DRIVE
Service repair no - 82.25.01
Remove
1.Remove heater/cooler unit
See Heater/cooler
unit.
2.Suitably support unit on a bench to prevent
damage to heater matrix pipes.
3.Remove 7 screws securing outlet duct to
heater/cooler unit.
4.Break sealing compound around edge of duct
and pull duct from unit.
5.Remove all fixing screws securing top cover
seam and cover sides to main casing.
6.Remove 4 screws and 4 nuts from top of cover.
7.Break sealing compound from unit casing and
top cover.
8.Lift off top cover, release grommet and feed
blower motor wiring and air flap operating rod
through respective apertures. Note thermostat
temperature probe which is inserted in top of
evaporator.
9.Release 2 clips securing expansion valve sensor
and lagging to low pressure pipe.
10.Unscrew union securing expansion valve to
evaporator high pressure pipe.
11.Remove expansion valve, complete with high
pressure pipe.
12.Disconnect high pressure pipe from expansion
valve.
13.Discard all pipe connection 'O' rings.
14.Clean sealing compound from all joints of main
casing, top cover and outlet duct.
Refit
15.Coat unions, threads and new 'O' rings with
refrigerant oil prior to reassembly.
16.Fit high pressure pipe to new expansion valve.
17.Fit expansion valve to evaporator pipe
connector.
18.Position valve sensor at low pressure pipe and
secure with lagging and clips.
19.Apply sealing compound around top edge of
main casing.
20.Feed blower motor wiring through top cover and
fit grommet.
21.Fit top cover to casing. Ensure thermostat
temperature probe is inserted in top of
evaporator. Apply mastic sealant to air flap
operating rod aperture.
22.Apply sealing compound to joint face of blower
motor outlet duct.
23.Locate duct over blower motor outlet and secure
to casing.
24.Fit heater/cooler unit
See Heater/cooler unit.

82AIR CONDITIONING
10
REPAIR HEATER MATRIX - LH DRIVE
Service repair no - 82.25.19
Remove
1.Remove evaporator
See Evaporator.
2.Leaving evaporator in place, remove single
screw securing heater matrix pipe plate to base
of support frame.
3.Remove heater matrix and insulation pad.
Refit
4.Position insulation pad and fit heater matrix to
support frame.
5.Fit heater matrix and evaporator assembly
See
Evaporator.
BLOWER MOTOR ASSEMBLY- LH DRIVE
Service repair no - 82.25.14
Remove
1.Remove heater/cooler unit
See Heater/cooler
unit.
2.Remove 7 screws securing outlet duct to
heater/cooler unit.
3.Carefully break sealing compound around edge
of duct and pull ducting from unit.
4.Remove 15 screws located around cover seam.
Break sealing compound from unit body and top
cover.
5.Remove 4 screws and 4 nuts from top of cover.
6.From front of unit remove 2 screws adjacent to
low pressure pipe moulding.
7.At side of unit remove 2 screws adjacent to air
intake aperture.
8.Lift off top cover, release grommet and feed
blower motor wiring and air control flap rod
through respective apertures. Note thermostat
probe which is inserted in evaporator matrix
through top cover.

AIR CONDITIONING
11
REPAIR
9.Remove screw securing blower motor mounting
bracket to side of casing.
10.Remove nut and washer securing blower motor
housing to pedestal mounting bracket.
11.Lift blower motor assembly from casing.
12.Remove 3 screws and withdraw blower motor
and impellor from housing. Note position of side
mounting bracket and spacing washers between
motor mounting and housing.
13.Remove star washer and withdraw impeller from
blower motor.
14.Lift motor from plastic mounting.
15.Slacken retaining clip and remove 3 support
brackets.Refit
16.Secure support brackets to new blower motor.
Do not fully tighten clip at this stage.
17.Insert motor into plastic mounting and fit
impeller.
18.Locate spacing washers, side mounting bracket,
and fit motor and mounting into motor housing.
19.Secure assembly to motor housing and fully
tighten support bracket retaining clip.
20.Fit blower motor assembly in main casing.
21.Apply sealing compound around top edge of
main casing.
22.Feed blower motor wiring through top cover and
fit grommet.
23.Fit top cover to casing. Ensure thermostat
temperature probe is inserted in top of
evaporator. Apply mastic sealant to air flap
operating rod aperture.
24.Apply sealing compound to joint face of blower
motor outlet duct.
25.Locate duct over blower motor outlet and secure
to casing.
26.Fit heater/cooler unit
See Heater/cooler unit.

82AIR CONDITIONING
12
REPAIR BLOWER MOTOR ASSEMBLY - RH DRIVE
Service repair no - 82.25.14
Remove
1.Disconnect blower motor wiring plugs.
2.Remove 2 screws securing blower motor cover
to main casing.
3.Withdraw cover sufficiently to release motor
Lucar connector and earth eylet. Remove cover.
4.Remove 6 screws and withdraw blower motor
and impeller.
5.Remove retaining nut and washer and withdraw
impeller from blower motor shaft.Refit
6.Secure impeller on new blower motor.
7.Fit blower motor assembly in main casing.
8.Fit Lucar connector and earth eyelet to blower
motor.
9.Fit blower motor cover and connect wiring plugs.

AIR CONDITIONING
13
REPAIR HEATER/COOLER UNIT - RH DRIVE
Service repair no - 82.25.21
Remove
1.Disconnect battery.
2.Recover refrigerant from air conditioning system
See Refrigerant recovery, recycling,
recharging.
3.Release ties, remove insulation cover and
disconnect evaporator low pressure pipe.
4.Disconnect evaporator high pressure pipe.
5.Discard all pipe connection 'O' rings. Cap or plug
all connections to prevent ingress of dirt and
moisture.
6.Using suitable pipe clamps, clamp heater matrix
feed and return pipes at heater/cooler unit.
7.Remove screw securing air control flap solenoid.
8.Disconnect 2 leads from thermostat.
9.Remove pipe from water valve vacuum switch.
10.Remove retaining clip and disconnect control
cable from evaporator flap operating rod.
11.Remove screw and release outer cable retaining
bracket.12.Disconnect blower motor wiring plugs and
release harness retaining clip from housing.
13.Remove bolt securing front support bracket to
blower motor housing. If necessary, remove
blower motor resistor block to facilitate
operation.
14.From inside vehicle remove front passenger
carpet, if fitted.
15.Remove fixing screws and fold back footwell
insulation.
16.Remove 4 bolts securing heater/cooler unit lower
mounting bracket to bulkhead. Ensure spacing
washers from two innermost bolts are retrieved
from engine bulkhead side.
17.From inside engine compartment remove 2 bolts
securing top heater/cooler unit mounting bracket
to engine bullkhead.
18.Lift heater/cooler unit clear of air duct seal and
remove from vehicle.

82AIR CONDITIONING
14
REPAIR Refit
19.Coat unions, threads and new 'O' rings with
refrigerant oil prior to reassembly.
20.Position heater/cooler unit in engine
compartment and locate with air duct seal.
21.Secure unit top and bottom mounting brackets to
bulkhead and support bracket to front of unit
casing. Fully tighten fixing bolts when unit is
correctly positioned.
22.If applicable, fit blower motor resistor block to
vehicle wing.
23.Connect blower motor wiring plugs.
24.Fit footwell insulation and carpet.
25.Fit control cable to evaporator flap operating rod
using new clip. Secure outer cable.
26.Connect water valve vacuum switch pipe and
thermostat leads.
27.Fit air control flap solenoid to side of
heater/cooler unit.
28.Reconnect heater matrix hoses.
29.Connect high pressure pipe to evaporator.
30.Connect low pressure pipe and fit insulation
cover.
31.Evacuate and recharge air conditioning system
See Adjustment, Refrigerant recovery,
recycling, recharging.
32.Reconnect battery.

AIR CONDITIONING
15
REPAIR EVAPORATOR - RH DRIVE
Service repair no - 82.25.20
Remove
1.Remove heater/cooler unit
See Heater/cooler
unit - RH drive.
2.Suitably support unit on a bench.
3.Remove sealant and release thermostat probe
from low pressure pipe.
4.Remove 2 screws securing blower motor cover
to main casing.
5.Withdraw cover sufficiently to release motor
Lucar connector and earth eyelet. Remove
cover.
6.Unscrew top adaptor pipe from heater matrix.
7.Remove 18 fixings securing top cover to main
casing and heater/cooler support frame.
8.Carefully break sealing compound around edge
of joint seam and remove top cover from main
casing.
9.Lift out heater matrix.
10.Remove 2 screws securing back of evaporator
to support frame.
11.From underneath, remove 2 nuts and washers
securing evaporator matrix to base of casing.
12.Lift evaporator matrix from casing, complete with
side plates.
13.Remove side plates
14.Clean sealing compound from all joint seams of
main casing and top cover.
NOTE: The evaporator matrix is supplied
complete with the expansion valve.
However, a faulty expansion valve can be
serviced separately,
See Expansion valve - RH
drive.
Refit
15.Locate side panels to new evaporator lower
fixing studs.
16.Fit evaporator, with side plates, into main casing.
Ensure both studs are located through bottom of
casing and secure.
17.Apply sealing compound around joint seam of
main casing.
18.Fit top cover to main casing.
19.Fit thermostat probe to to low pressure pipe and
apply sealant.
20.Fit top adaptor pipe to heater matrix.
21.Fit Lucar connector and eath eyelet to blower
motor.
22.Fit blower motor cover.
23.Fit heater/cooler unit assembly into engine
compartment
See Heater/cooler unit.

82AIR CONDITIONING
16
REPAIR EXPANSION VALVE - RH DRIVE
Service repair no - 82.25.01
Remove
1.Remove evaporator
See Evaporator - RH
drive.
2.Unscrew union securing pressure sensor to low
pressure pipe.
3.Release spring clip securing temperature sensor
to low pressure pipe.
4.Unscrew union and remove expansion valve
from evaporator high pressure pipe.
5.Remove high pressure pipe from expansion
valve.
6.Discard all pipe connection 'O' rings.
Refit
7.Coat unions, threads and new 'O' rings with
refrigerant oil prior to reassembly.
8.Fit high presssure pipe to new expansion valve.
9.Fit expansion valve to evaporator high pressure
pipe.
10.Secure temperature and pressure sensors to low
pressure pipe.
11.Fit evaporator
See Evaporator - RH drive.

AIR CONDITIONING
17
REPAIR HEATER MATRIX - RH DRIVE
Service repair no - 82.25.19
Remove
1.Remove heater/cooler unit
See Heater/cooler
unit - RH drive.
2.Suitably support unit on a bench.
3.Remove sealant and release thermostat probe
from low pressure pipe.
4.Remove 2 screws securing blower motor cover
to main casing.
5.Withdraw cover sufficiently to release motor
Lucar connector and earth eyelet. Remove
cover.
6.Unscrew top adaptor pipe from heater matrix.
7.Remove 18 fixings securing top cover to main
casing and heater/cooler support frame.
8.Carefully break sealing compound around edge
of joint seam and remove top cover from main
casing.
9.Lift out heater matrix.
10.Clean sealing compound from all joint seams of
main casing and top cover.
Refit
11.Locate heater matrix in main casing.
12.Apply sealing compound around joint seam of
main casing.
13.Fit top cover to main casing.
14.Fit adaptor pipe to heater matrix.
15.Fit thermostat probe to to low pressure pipe and
apply sealant.
16.Fit Lucar connector and eath eyelet to blower
motor.
17.Fit blower motor cover.
18.Fit heater/cooler unit assembly into engine
compartment
See Heater/cooler unit.

82AIR CONDITIONING
18
REPAIR RESISTOR, BLOWER MOTOR - LH DRIVE
Service repair no - 82.20.26
Remove
1.Remove multi-plug from resistor.
2.Remove blower motor relay from connecting
block to gain access to fixing screw.
3.Remove screw and release relay connector
block. Retain relay in connector block.
4.Remove screw and detach air conditioning 30
amp fuse bracket from resistor.
5.Lift resistor unit from top cover.
Refit
6.Locate resistor unit in top cover.
7.Fit fuse bracket.
8.Fit blower motor relay connector block and relay.
9.Fit resistor multi-plug.RESISTOR, BLOWER MOTOR - RH DRIVE
Service repair no - 82.20.26
Remove
1.Remove multi-plugs from resistor.
2.Remove 2 screws securing resistor to wing
mounted block.
3.Withdraw resistor unit.
Refit
4.Secure resistor to mounting block.
5.Fit resistor multi-plugs.