LAND ROVER DEFENDER 1999 Workshop Manual

77PANEL REPAIRS
2
PAINT Clinch Panels (eg Door skins etc.)
1. Abrade primer on new and existing panel joint
faces, and clean using a solvent wipe.
2. Apply metal-to-metal adhesive where applicable.
3. Where joints are to be spot welded, apply
suitable weld-through, zinc rich primer to weld
areas.
4. Where joints are to be MIG welded, apply zinc
rich primer in adjacent areasbut leave the
welded area untreated.
5. To retain the panel whilst clinching the flanges,
tack spot weld or plug weld as appropriate.
6. Clean the panel with a solvent wipe.
7. Treat bare metal areas with a suitable etch
phosphate process.
8. Re-prime affected areas as necessary as for
rectifying transit damage.See this section.
NOTE: Replacement doors, bonnets and
tailgates must be treated with a suitable
seam sealer on clinched seams, following
the primer coat.
Paint Refinishing
1. Seal all accessible exterior and interior seams
with an approved seam sealer. Certain joints
such as sill lower flange seams must be left
unsealed.
2. Apply a suitable anti-chip primer where
specified.
3. Apply a two-pack paint refinishing system.
4. Repair any damage to underbody sealers either
at this stage or before paint operations.Paint Repairs
Before carrying out paintwork repairs, the vehicle
must be thoroughly cleaned using either a steam
cleaner or high-pressure washer.
Wash locally repaired areas using a mild
water-mixable detergent and wipe them clean with
solvent, immediately prior to paint application.
Abrade damaged paintwork where bare metal has
been exposed until the metal is clean and extends
beyond the area of immediate damage. Treat the bare
metal with an etch phosphate to remove all traces of
rust and provide a key for new paint coats. Re-treat
the affected area using either a separate acid-etch
primer and two-pack surfacer or an integrated etch
primer/filler, and follow with a two-pack paint system.
Those surfaces not receiving paint must be treated
with a cavity wax following paint operations.
M77 2108B
A
B
C
A. Two-pack top coat
B. Two-pack primer filler and etch primer
C. Etch phosphate
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82 - AIR CONDITIONING
CONTENTS
Page
ADJUSTMENT
REFRIGERANT RECOVERY, RECYCLING, RECHARGING 1.............................
REPAIR
COMPRESSOR 1...................................................................................................
MOTOR - CONDENSER FAN 2..............................................................................
RECEIVER DRIER 2...............................................................................................
RELAY - TEMPERATURE CONTROL - FROM 02MY 3.........................................
EVAPORATOR 4....................................................................................................
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AIR CONDITIONING
1
ADJUSTMENT REFRIGERANT RECOVERY, RECYCLING,
RECHARGING
Service repair no - 82.30.02
WARNING: The air conditioning system is
charged with a high pressure, potentially
toxic refrigerant. Repairs or servicing must
only be carried out by an operator familiar with
both the vehicle system and the charging and
testing equipment.
WARNING: All operations must be carried
out in a well ventillated area away from
open flame and heat sources.
WARNING: Wear eye and hand safety
protection.
CAUTION: Overcharging air conditioning
system will cause excessive head
pressure.
An air conditioning portable Refrigerant Recovery
Recycling Recharging Station for use with R134a
refrigerant incorporates all the features necessary to
recover R134a refrigerant from the air conditioning
system; to filter and remove moisture; to evacuate and
recharge with the reclaimed refrigerant. The unit can
also be used for performance testing and air
conditioning system analysis.
The operator must adhere to the equipment
manufacturer’s instructions.
Refrigerant Recovery
1.Remove dust caps from high and low pressure
connectors.
2.Connect high and low pressure hoses to
appropriate connections.
3.Open valves on connectors.
4.Turn valves on refrigerant station to correct
positions.
NOTE: Operate the refrigerant station in
accordance with the manufacturers
instructions.
5.Turn Process switch to correct position.
6.Turn Main switch to’ON’.
7.Allow station to recover refrigerant from system.8.Close valves on refrigerant station.
9.Turn Main switch to’OFF’.
10.Close valves on connectors.
11.Disconnect high and low pressure hoses from
connectors.
12.Fit dust caps to connectors.
13.Open tap at rear of station to drain refrigerant oil
recovered from system.
14.Measure and record quantity of refrigerant oil
recovered from system.
15.Close tap at rear of station.
Evacuation
CAUTION: Whenever the refrigerant
system is opened, the receiver/drier must
be renewed immediately before evacuating
and recharging the system.
1.Remove dust caps from high and low pressure
connectors.
2.Connect high and low pressure hoses to
appropriate connections.
3.Open valves on connectors.
4.Turn valves on refrigerant station to correct
positions.
5.Turn Process switch to correct position.
6.Turn Main switch to’ON’.
7.Allow station to evacuate system.
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. Next check the high
pressure lines.
NOTE: The system must be evacuated
immediately before recharging
commences. Delay between evacuation
and recharging is not permitted.
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82AIR CONDITIONING
2
ADJUSTMENT Recharging
WARNING: Refrigerant must always be
recycled before re-use, to ensure that the
purity of the refrigerant is high enough for
safe use within the air conditioning system.
Recycling should always be carried out with
equipment which is design certified by
Underwriter Laboratory Inc. for compliance with
SAE-J1991. Other equipment may not re-cycle the
refrigerant to the required level of purity.
WARNING: A R134a Refrigerant Recovery
Recycling Recharging station must not be
used with any other type of refrigerant.
WARNING: R134a refrigerant from
domestic and commercial sources must
not be used in motor vehicle air
conditioning systems.
CAUTION: When a major repair has been
carried out, a leak test should be carried
out using inert gas.
1.Close valves on refrigerant station.
2.Close valve on oil charger.
3.Disconnect yellow hose from refrigerant station.
4.Remove lid from oil charger.
5.Pour correct quantity of refrigerant oil into oil
charger.
6.Fit lid to oil charger.
7.Connect yellow hose to refrigerant station.
8.Open valve on oil charger.
9.Move pointer on refrigerant gauge to mark
position of refrigerant drop.
10.Slowly open correct valve on refrigerant station
and allow vacuum to pull refrigerant into system.
11.Close valve on refrigerant station when correct
amount of refrigerant has been drawn into air
conditioning system.
12.If the full charge is not accepted by the system,
start the engine and run it at 1,500 rev/min for a
minimum of 2 minutes. Switch on the air
conditioning system, open the vehicle windows,
set the temperature control to cold and the
blower switch to maximum.
13.Consult Refrigerant station instruction manual for
correct procedure to complete the charge.
14.Turn Main switch to’OFF’.
15.Close valves on connectors.
16.Disconnect high and low pressure hoses from
connectors.
17.Fit dust caps to connectors.
18.Carry out performance test on air conditioning
system.
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AIR CONDITIONING
1
REPAIR COMPRESSOR
Service repair no - 82.10.20
Remove
1.Remove engine acoustic cover.See ENGINE ,
Repair.
2.Depressurise A/C system.See Adjustment.
3.Remove auxiliary drive belt.See
ELECTRICAL, Repair.
4.Drain cooling system.See COOLING
SYSTEM, Adjustment.
5.Disconnect multiplug from compressor.
6.Remove 2 bolts securing air conditioning pipes
to compressor and discard’O’rings.
CAUTION: Immediately cap all air
conditioning pipes to prevent ingress of
dirt and moisture into the system.
7.Release clips and disconnect top hose from
coolant elbow and heater pipe.
8.Remove 4 bolts securing compressor to
mounting bracket.
9.Remove compressor.Refit
10.Position compressor to mounting bracket and
tighten bolts to25 Nm (18 lbf.ft).
11.Remove caps from compressor and pipe
connections.
12.Clean compressor and pipe connections.
13.Lubricate new’O’rings with refrigerant oil and fit
to compressor.
14.Position A/C pipes to compressor and tighten
bolts to9 Nm (7 lbf.ft).
15.Connect multiplug to compressor.
16.Position top hose and secure with clips.
17.Refill cooling system.See COOLING SYSTEM,
Adjustment.
18.Fit auxiliary drive belt.See ELECTRICAL,
Repair.
19.Recharge A/C system.See Adjustment.
20.Fit engine acoustic cover.See ENGINE ,
Repair.
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82AIR CONDITIONING
2
REPAIR MOTOR - CONDENSER FAN
Service repair no - 82.15.01
Remove
1.Remove 6 screws and remove radiator grille.
2.Disconnect fan multiplug and release multiplug
holder from retaining clip.
3.With assistance remove 4 nuts and bolts
securing motor to condenser.
4.Remove motor.
Refit
5.Position motor to condenser and with assistance
tighten nuts and bolts to8 Nm (6 lbf.ft).
6.Connect motor multiplug.
7.Position radiator grille and secure with screws.RECEIVER DRIER
Service repair no - 82.17.03
Remove
1.Recover refrigerant from A/C system.See
Adjustment.
2.Remove 2 bolts securing pipe unions to receiver
drier.
3.Release pipes and discard’O’rings.
CAUTION: Immediately cap all air
conditioning pipes to prevent ingress of
dirt and moisture into the system.
4.Remove 2 bolts securing receiver drier mounting
bracket to chassis.
5.Remove receiver drier, slacken clamp bolt and
remove bracket.
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AIR CONDITIONING
3
REPAIR Refit
6.Position bracket to receiver drier and tighten
clamp bolt.
7.Position receiver to chassis and tighten bolts.
8.Remove plugs from A/C pipes.
9.Lubricate new’O’rings with refrigerent oil.
10.Fit’O’rings, position pipes and tighten bolts to8
Nm (6 lbf.ft).
11.Recharge A/C system.See Adjustment.RELAY - TEMPERATURE CONTROL - FROM 02MY
Service repair no - 82.20.40
Remove
1.Remove front speaker from drivers side.See
ELECTRICAL, Repair.
2.Release relay from support bracket.
3.Disconnect multiplug and remove relay.
Refit
4.Connect multiplug to relay and fit relay to
bracket.
5.Fit front speaker.See ELECTRICAL, Repair.
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82AIR CONDITIONING
4
REPAIR EVAPORATOR
Service repair no - 82.25.20
Remove
1.Remove battery cover.
2.Recover refrigerant from A/C system.See
Adjustment.
3.Remove 2 bolts securing A/C pipes to
evaporator.
4.Release pipes and discard’O’rings.
CAUTION: Immediately cap all air
conditioning pipes to prevent ingress of
dirt and moisture into the system.
5.Remove 2 screws and release fuse/relay bracket
from body and collect 2 spacers.
6.Remove 8 screws securing speakers to A/C
duct.
7.Disconnect speaker Lucars and remove
speakers.
8.Remove 4 screws and bolt securing A/C duct to
fascia panel.
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AIR CONDITIONING
5
REPAIR
9.Disconnect multiplug from auxiliary relay
bracket.
10.Release drain pipe from evaporator.
11.Release evaporator from bulkhead grommet.
12.With assistance remove A/C duct assembly from
vehicle.
NOTE: Do not carry out further
dismantling if component is removed for
access only.
13.Disconnect blower motor multiplugs.
14.Remove 5 screws and remove blower unit from
A/C duct.
15.Disconnect multiplug from trinary switch.
16.Remove Allen screw, remove pipe assembly
from evaporator and discard’O’rings.
CAUTION: Immediately cap all air
conditioning pipes to prevent ingress of
dirt and moisture into the system.
17.Remove 7 screws and remove evaporator cover
from A/C duct.
18.Release temperature sensor and remove
evaporator.
19.Remove 2 Allen screws, remove TXV from
evaporator and discard’O’rings.
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