Land Rover Defender 90 110 Workshop Book 5 Rover

							AIR CONDITIONING - L.H. & R.H. STEERING 
- 2. Adjust both service  valve seats to the mid 
(Test)  position. 
*F>, I .; 4. NOTE: If it is necessary to disconnect  the compressor 
hoses,  the compressor  should  be sealed  by fully  closing 
the  relevant  service  valve  (turn  fully  clockwise). 
It is 
essential to ensure  that  both  service  valves  are open 
before  operating  the  compressor.  Similarly  any other 
component  of the  refrigeration system should  be capped 
immediately when disconnected. 
18. Open  the refrigeration  drum valve. 
19.  Open 
the valve  at the  base of the charging  cylinder 
and  allow  approximately 
0,25 kg (0.5 Ib) of 
refrigerant  to enter 
the cylinder. 
20.  Close  the refrigeration  drum valve and the valve  at 
the  base 
of the charging  cylinder. 
21.  Open  the refrigerant  control valve (valve 
No. 4) 
and flush out the high  and low pressure  lines by 
opening  valves 
Nos. 1 and 2 momentarily  until a 
white  stream  of refrigerant  is observed. - 
ST 1414M 
22. Close all valves on the charging  and testing 
23.  The  air conditioning  system 
is now depressurised. 
equipment, 
and 
fit the blanking  caps. 
Evacuating 
Whenever the system has becii ~peiieb io iiie 
atmosphere it is necessary  that the system  be evacuated 
to  remove  all 
air and moisture. It is also an essential 
preliminary  operation 
to charging the system  with 
Refrigerant  12. The  evacuate  operation  also provides  a 
check  for leaks  due 
10 faulty  connections. 
::: 2. 
1. Depressurise  the air conditioning  system as 
previously  described,  then 
conncct the gauge set as 
detailed  under Charging  and Testing  Equipment. 
3. Open the low  and  high  pressure  valves Nos. 1 and 
2. 
4. Start  the vacuum  pump and check that thc vacuum 
pump  valve is open. 
5.  Slowly  open the vacuum  control valve 
No. 3. If the 
vacuum  is applied  to 
the system too quickly,  the 
residual  oil may  bc drawn  out. 
4 ST 1394M 
6. In evacuating  the system it is necessary to lower the 
pressure so that  the boiling  point of water in the 
system  is lower  than 
the surrounding  air 
tempcrature. At an ambient temperature of 23.SC 
(75F), it is necessary to lower the system  pressure 
to 29.5 in Hg vacuum to bring  the boiling  point of 
water to 22°C (72°F).  Atmospheric prcssure (and 
vacuum  gauge readings)  decrease 
as altitude 
increases  by 
approximalcly 25 mm (I in) IIg per 
300 
m (1000 ft).  The  following  chart provides a 
guide to the various  gauge readings at diflering 
altitudes, for the same 10 mm (0.4 in) Hg absolute 
pressure. 
Altitude, 
ft m Vacuum Reading in Hg mm 
0  0 29.5 
750 
1,000  300 
28.5  725 
2,000  600  27.4 
695 
3,000 
900 26.4  670 
4,000  1200  25.4 
645 
5 ,GUU i 5Oii 24.5 622 
6,000 1800 
23.5  596 
7,000  2100  22.6  574 
8,000  2400 
21 .a 554 
9,000  2700 
20.9 
530 
10,000 3000 20.1 510 
13  
						

							- 
82 
7. The low  side  gauge  should  indicate  a vacuum  of 
660 
mm (26  in) Hg  within  five minutes. 
8. Whilst  the system is evacuating, fill the  charging 
cylinder  by opening  the refrigerant  drum 
valvc. 
9. Open the valve  at the  base  of the  charging  cylinder 
and 
fill the  cylinder  with 1,0 kg (2.2 Ib) of 
refrigerant.  Liquid refrigerant will be observed 
rising  in 
the sight glass. 
10. As the refrigcrant stops  filling  the cylinder,  opcn 
the  valve 
at the top of the cylinder  (behind the 
control panel) intermittently,  to relieve  the head 
pressure  and allow  the refrigerant  to continue 
filling  the cylinder. 
11. When  the refrigerant  reaches the desired  level in 
the sight glass,  close both the valve  at the basc of 
the  cylinder  and 
the valve at the bottom of the 
refrigerant  tank. 
12. Ensure the top  cylinder  valve is fully  closed.  If 
bubbling  is present 
in the  sight  glass,  reopen the 
cylinder  base valve  momentarily  to equalise  the 
drum  and cylinder  pressures. 
13. If 660 mm (26 in)  Hg  of vacuum  is not  achieved 
within 
fivc minutes,  it signifies  either the system 
has  a leak 
or thc vacuum  pump is dcfcctive. 
Initially  check 
thc vacuum pump, if thc pump 
proves  to be  functioning  properly then investigate 
for  a leak 
in thc air  conditioning  system. 
14. Close thc vacuum control valve No. 3. 
15. Stop the vacuum  pump and allow  the vacuum  to 
hold  for fifteen  minutes,  then check  that there  is no 
pressure  rise (a 
loss of vacuum)  evident on the 
compound  gauge. Any pressure  rise denotes  a leak 
which  must be rectified  before 
procccding further. 
Refer 
to the  heading  titled ‘Leak  Detection’  later 
in this section. 
16. With thc system  satisfactorily  evacuated, the 
system  is ready 
for charging  with refrigerant. 
AIR CONDITIONING - L.H. & R.H. STEERING 
ST 1395M I” 
k 
Sweeping 
NOTE: This  operation  is in  addition  to evacuating,  and 
is  to  remove  moisture  from systems  that have  been open 
to  atmosphere  for 
a long period, or that are known  to 
contain  excessive  moisture. 
1. Fit a new liquid receiver/dricr, as detailed undcr 
the heading “Receiver/Drier”. 
2. Ensure  that  a full drum  of refrigerant  is fitted on 
the  charging  and testing  equipment. 
3. Fit the charging  and testing  equipment  as 
previously  described for evacuating  and evacuate 
the  air conditioning  system, allowing 
0,25 to 
0,45 kg (’h to 1 Ib) of refrigerant  to enter  the 
charging  cylinder. 
4. Close all valves  on the  charging  and testing 
equipment. 
5. Disconnect  the intake  hose from thc vacuum 
Pump. 
A 
ST 1396M 
n: % y* 
6. Connect thc intake  hose to thc valve  at the  top  of 
the charging  cylinder. 
7. Open the valve  at the  top  of the  charging  cylinder. 
8. Put on safety goggles, 
9. Crack  open the hose  connection  at valve No. 3 and 
allow  some refrigerant  to purge 
the hose,  then 
close  the connection. 
10. Open  the high  pressure  valve (No. 2). 
11. Slowly open valve No. 3, which is now connected 
to  the  top  valve  of the  charging  cylinder,  and allow 
gas  to flow  into the system  until the reading  on the 
compound  gauge remains  steady. Between 
0,25 
and 0,45 kg (I/? to 1 Ib) of refrigerant  will entcr the 
system. 
12. Allow the dry  refrigerant  introduced into the 
system 
to remain  for 10 minutes. 
14  
						

							AIR CONDITIONING - L.H. & R.H. STEERING IS21 
i( 13. Crack the suction valve charging  line at the service 
port  on  the  compressor  to allow  an escape 
of 
refrigerant,  at  the same  time observing thc sight 
glass 
in the  charging cylinder. A slight  drop in the 
level  should  be allwwed before  closing  the 
connection  at the  compressor. 
1. 
14. Close  the high pressure  valve (No. 2). 
15. Close valve No. 3. 
16. Close  the valve  at the  top  of the charging  cylinder. 
14-10 
ST 1397M 
17. Reconncct thc charging  and  testing equipment,  as 
described 
for evacuating  and evacuate  the  air 
conditioning system. 
18. Maintain  the  vacuum for twenty minutes.  The air 
conditioning  system is now  ready 
for charging  with 
refrigerant. 
Charging 
CAUTION: 
Do not  charge  liquid refrigerant  into the 
compressor.  Liquid cannot be  compressed;  and if liquid 
refrigerant  enters the compressor  inlet valve,  severe 
damage 
is possible;  in addition,  the oil charge may be 
absorbed  into the refrigerant,  causing damage  when the 
compressor 
is operated. 
1. Fit the  charging  and testing  equipment as 
previously  described for evacuating. 
2. Evacuate the air conditioning  system  allowing 
1,0 kg (2.2  Ib) of refrigerant  to enter the  charging 
rvlinrier -J  3. Put on safety goggles. 
4. Close  the low pressure  valve (No. 1). 
5. Open the refrigerant  control  valve (No. 4) and 
release  liquid refrigerant  into the system  through 
the  compressor  discharge  valve port (High 
pressure). 
The pressure in the  system  will 
eventually balance. 
6. If the full charge of 1,0 kg (2.2 Ib) of liquid 
refrigerant  will not enter  the system, then  close  the 
high  pressure  valve 
(No. 2) and open  the low 
pressure  valve 
(No. l), ensuring  that the low 
pressure  gauge does not exceed 
40 psi. 
7. Start  and run the engine  at  1,000-1,500 rev/min 
and allow  refrigerant  to be  drawn  though  the  low 
pressure  valve 
(No. 1) until the full  charge of 
1,0 kg (2.2 Ib) has been drawn into the system. 
8. Close  valve No. 1. 
6, 4-6 
 ST 1398M 
9. Check  the  air  conditioning  system is operating 
satisfactorily  by carrying  out a  prcssurc  test,  as 
described later 
in the Section. 
CAUTION: Do not  overcharge  the air conditioning 
system 
as this  will cause  excessive  head pressure. 
Leak  test 
The following  instructions  refer to an  electronic  type 
refrigerant  leak detector  which is the  safest,  most 
sensitive  and widely  used. 
1. Place the vehicle in a well  ventilated  arca 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 uscd. Certain 
dctectors have visual  and audible indicators. 
3. Commence  searching for leaks  by passing  the 
deiecioi pietie aiuund aii jwinis and components, 
particularly  on 
the underside, as the  refrigerant  gas 
is  heavier than air. 
4. Insert the probe into an  air  outlet of the 
evaporator.  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. 
15  
						

							182 I AIR CONDITIONING - L.H. & R.H. STEERING 
Ambient 
Temperature 
C OF 
16  60 
26,7 80 
38  100 
433 110 
5. Insert the probe  between the magnetic  clutch and 
compressor  to check  the shaft  seal for leaks. 
6. Check all service  valve conncctions, valve plate, 
head  and base  plate  joints and  back seal plate. 
7.  Check  the  condenser  for  leaks at the  pipe 
connections. 
8. If  any  leaks  are found,  the system  must  be 
depressurised  before  attempting rectification. 
If 
repairs by brazing  are necessary,  the  component 
must 
be removed  from thc vehicle  and all traces of 
refrigerant  expelled before heat  is applied. 
9. After  repairs  check  the  system for leaks  and 
evacuate  prior to charging. 
Compound Gauge High Pressure Readings  Gauge Readings 
kgf/cm2 Ibf/in2 kgf/cm2 Ibflin 
1,05-1,4 15-20 7,O-10,2 100-150 
1,4-1,75 20-25 9,8-13,3 140-190 
1,75-2,1 25-30 11,6-15.8 180-225 
2,l-2,45 30-35 15,l-17,5 215-250 
Pressure test 
1. Fit the charging  and test equipment  as  previously 
2. Start the engine. 
3. Run  the engine  at 1,000 to 1,200 rev/min with  the 
heat  control set  to 
cold (blue) zone,  air distribution 
to the central  position,  recirculation control to 
recirculation and the air conditioning control ON 
with  fan speed  to maximum. 
4.  Note 
thc ambient  air  tcmpcrature  control in the 
immediate  test area 
in front  of the  vehicle,  and 
check  the  high pressure  gauge  readings 
- 
discharge sidc - against  table 1. 
- described. 
Table I 
Test 
1. Place the vehicle  in a ventilated, shaded  area free 
from  excessive  draught, with the doors  and 
windows  open. 
2.  Check  that 
the surface of the  condenser  is not 
restricted  with dirt,  leaves,  flies, etc. 
Do not 
neglect  to check  the surface between  the condenser 
and the  radiator.  Clean as necessary. 
3. Switch on the  ignition  and the  air  conditioner  air 
flow  control.  Check that the blower  is operating 
efficiently  at low,  medium  and high  speeds.  Switch 
off the blower  and the ignition. 
4. Check  that the evaporator  condensate  drains are 
open  and clear. 
5. Check  the tension of the  compressor  driving belt, 
and  adjust 
if necessary. 
6. Inspect  all connections  for  the presence  of 
refrigerant  oil. 
If oil is evident,  check for leaks, and 
rectify  as necessary. 
NOTE:  The compressor  oil is soluble in Refrigerant 
12 and is deposited  when the refrigerant  evaporates 
from  a leak. 
7.  Start the  engine. 
8. Set the  temperature  control  switch to maximum 
cooling  and switch  the air conditioner  blower 
control 
on and  off several  times, checking  that the 
magnetic  clutch on the  compressor  engages and 
releases  each time. 
9. With the temperature  control at  maximum  cooling 
and  the blower  control  at high  speed,  warm up the 
engine  and fast idle  at  1,000 
rev/min. Check the 
sight  glass  for  bubbles 
or foam. The sight  glass 
should  be generally  clear  after  five minutes 
running,  occasional  bubbles being  acceptable. 
Continuous  bubbles  may appear  in a serviceable 
system  on a cool  day, 
or if there  is insufficient  air 
flow  over 
the condenser  at a high  ambient 
temperature. 
10.  Repeat  at  1,800 
rev/min. 
11. Gradually  increase the engine  speed to the high 
12. Check  for frosting  on the  service  valves and 
range, and 
check the sight glass  at intervals. 
evaDorator fins. 
I 7, Close both service ports (turn fully a,,ti-clockwise)/ 
and  close  all valves on the  charging  and test 
equipment.  Disconnect the charging  lines from  the 
compressor. Refit the blanking caps to the 
compressor  valve stems,  port  connections  and 
charging lines. 
i3. Check the nigh pressure pipes and connecrions by 
hand  for  varying temperature. Low temperature 
indicates  a restriction  or blockage  at that  point. 
14.  Switch off  the air conditioning blower and  stop the 
engine. 
satisfactory,  proceed  with the  pressure  test as 
15. If the  air  conditioning  equipment is still  not 
8. Close  the bonnet. 
16 
previously  described in this  section.  
						

							AIR CONDITIONING- L.H. & R.H. STEERING 1821 
COMPRESSOR Petrol model 
Removal , .I /:. . ./. m 
1. Place  the vehiclc  in a  ventilated  area away  from 
open  flames  and heat sources. 
2.  Stop  the engine  and  secure the bonnet  in an  open 
position. 
3.  Remove  the  caps from  the  compressor  service 
valves  and connect  the gauge  set for  evacuating. 
4. Evacuate  the system  as previously  described. 
5. Open fully (turn  anti-clockwise)  the compressor 
service  valves and disconnect  the gauge  set. Cap  all 
pipe  and valve  connections 
to prevent  dirt or 
moisture  entering the system. 
6. Remove  the  electrical connections to the 
compressor. 
-. V8 models  only 
4
-cylinder  Petrol only 9. Release the jockey  wheel  adjuster to enable  the 
10. Release  the tensioner on the  compressor  drive belt. 
11. Remove the  fixing bolt and swivel  the compressor 
and  bracket  assembly  to expose 
the bolt  which  is 
securing  the bracket. 
12. Remove  the bolt  and lift the  compressor  and 
bracket  clear and place 
on a bench. 
13.  Whilst  supporting  the compressor,  remove the five 
bolts  holding  the compressor  to the brackets. 
front 
drive  (fan) belt to be  removed. 
7. Shckcn all the ComPressor adjustment fixin@ and 
8. Remove the adjusting  and  pivot  fixings and the 
remove 
the drive  belt from the compressor. 
compressor from retaining bracket. 
Diesel  model 
8- 
ST1418M 
All engines 
14. No servicing  is recommended  to the compressor, 
therefore  a new  unit  must 
be fitted. 
15.  Reverse procedure  as appropriate  13 to 
9 and 6 to 3 
for 
V8 models  or 8 to 3 for 4-cylinder  models 
noting  the procedure  for adjusting the  compressor 
drive belts. 
17  
						

							El AIR CONDITIONING - L.H. & R.H. STEERING 
Refitting 
Drive  belt adjustment 
Diesel  only 
16. Ensure  all adjustment  bolts  associated  with the 
compressor  are slack. 
17. Alter  the position of the  compressor  to provide  a 
belt  tension  of 4
-6 mm (0.19-0.25  in). Secure all 
compressor  adjustment bolts  and recheck the 
tension. 
4-cylinder  Petrol only 
18. Ensure  all adjustment  bolts associated  with the 
compressor 
(1) and  the lower  pulley  pivot fixing  (2) 
are  slack. 
19. Adjust  the position  of the  lower  pulley  to give  a 
belt tension 
of 4-6 mm (0.19-0.25  in). 
20.  Tighten 
the pivot  bolt  and recheck the tension. 
21.  Alter  the position 
of the  compressor to provide  a 
22. Secure all compressor  adjustment bolts  and 
belt 
tension 
of 4-6 mm (0.19-0.25  in). 
recheck  the tension. 
1 
ST1409M 
24.  Alter  the  position of the compressor to provide a 
belt  tension  of 4-6 mm (0.19-0.25  in). Secure  all 
compressor  adjustment bolts  and recheck  the 
tension. 
25.  Ensure  the jockey  pulley  adjustment bolts are 
slack. 
26.  Alter  the position 
of the  jockey  pulley to give a belt 
tension 
of 4-6 mm (0.19-0.25  in).  Secure  the 
adjustment  bolts and recheck tension. 
ST1391 M 
ST 1401M 
CONDENSER FAN MOTORS 
Removal 
1. Open  and secure the bonnet. 
2. Release  the  six self  tapping  screws securing  the 
front  nose and grille  assembly, 
lift clear. 
3.  Disconnect  the electrical  leads to 
the fans. 
4. Remove  the blanking  caps from  the fan  centres. 
5.  Remove  the 
8 mm securing  nuts,  star  and  spring 
washers  from the fan blade  centres,  pull blade  from 
its respective  fan motor  shaft. 
6. Release the two  fan  motor retaining  bolts and 
remove 
the motor whilst  feeding  the fan motor 
through  the appropriate  aperture. 
Refitting 
V8 Petrol only 2. 7. Reverse  procedures 6 to 1 ensuring the fan supply 
wiring  is routed  and  securely clipped 
so that the 
f-y 
23. Ensure all adjustment  bolts associated  with the 
compressor 
are slack.  wiring 
does not foul the fan blades. 
18  
						

							AIR CONDITIONING- L.H. & R.H. STEERING 1821 
CONDENSER AND RECEIVER/DRIER 
Removal 
1. Place the vehicle in a well  ventilated  arca. 
2. Stop the engine,  open and secure the  bonnet. 
3. Remove the caps  from  the compressor  service 
valves.  Connect  the  gauge  set 
for evacuation,  and 
evacuate  as detailed  earlier. 
4. Having  evacuated  the air conditioning  system, 
open  fully (turn  anti
-clockwise)  the  compressor 
service  valves and disconnect  the gauge  set. 
Replace 
all caps  to valve connections. 
5. Release the four  top and  two side  fixings  securing 
the  grille  and nose  assembly and remove. 
6. Disconnect  the wires  at the  rear of the  horn, the  air 
conditioning  fan leads located  across 
the top of the 
fan  cowling 
frame and the electrical  connector to 
the receivddrier. 
7. Release the four  bolts  and large  packing  washers  ~ 
8. Remove 
the four  nuts securing  the fan cowling  to 
NOTE: L.H. steering vehicle illustrated on R.H. 
steering  vehicles the high  pressure  hose is on the side of 
the evaporator unit facing the engine, 
securing  the cowling to the  wing  sides. 
the  bottom bracket  and 
lift clear. 
9. Remove the two  bolts securing thc bonnet striker 
support  plate. 
13. Release  the  high pressure  pipe from  the receiver/ 
drier,  cap the pipc end connections. 
Condenser  removal only 
10. Release the  top air conditioning  hose and  cap  the 
ends 
to prevent  moisture  and dirt entering  the 
system. 
7 610 9 6 7 
7 
S 
14. Release  both air conditioning  pipes  from the 
condenser  extension  plate. Lift the condenser 
clear. 
Receiveddrier removal 
15. 
11. Lift  the condenser  from the bottom  mounting lugs 
and carefully  ease the condenser  forwards as far as 
possible. 
16. 
12. Release  the high  pressure  air conditioning  hose 
complete  with the sight 
glass, at the  evaporator 17. 
connection.  Cap the ends to prevent  dirt  or 
moisture  entering the system. 
.-‘.;t:, .I... -> : .p. 
Whilst supporting with suitable  spanners,  unscrew 
pipe  ends  to prevent  dirt 
or moisture  entering  the 
system. 
Release  the 
receiver/drier clamp  bolts and allow 
the  assembly 
to drop  clear of the condenser. 
Lift  the 
receiveddrier from the condenser  and 
discard. 
11 is NOT recommended  to refit  the old 
unit. 
19 
the b~tt~m tifii~fi to the ieceii;eii’diiei. “Lap the  
						

							1821 AIR CONDITIONING - L.H. & R.H. STEERING 
EVAPORATOR - LH steering models 
NOTE: It is only  necessary  to evacuate  the air 
conditioning  system  when  removing  the  evaporator 
matrix  or 
to change the  expansion valve. 
Removal 
5 1. Place  the vehicle in a  ventilated  area away  from 
2.  Stop  the  engine  and  secure  the  bonnet  in an  open 
open 
flames  and heat  sources. 
position. 
Refitting 
18. Reverse  procedures  17 to 15 using a new  receiver/ 
drier  unit. 
19. Connect  the high  prcssurc  pipe to the received 
drier.  Using two spanners  on each  union,  tighten 
the  union  noting  that 
the sight glass remains in the 
vertical  position. 
20.  Carefully  locate the  condenser  into position,  refit 
the fixings securing  the condenser to  the extension 
plate. 
Connect  and tighten  the  air conditioning  hose 
to 
the top  of the condenser.  Use two spanners on each 
union. 
21.  Refit 
the condenser to the bottom  bracket. 
22.  Place  the bonnet  striker support  plate  into 
position,  do 
not secure at this stage. 
23. 
Fit the  fan  cowling  support brackets.  It will  be 
necessary 
to lift thc bonnet  striker support  plate  to 
permit  the positioning  of the  fan cowling  assembly 
to  the  condenser mounting 
lugs. 
24. Secure  the steady  rods  and the lower condenser 
mounting bracket. 
Do not  tighten  the  bolts  at this 
stagc. Reconnect the  top horn electrical  leads. 
25.  Loosely 
fit the  four  bolts and distance  washers 
which  support 
the bonnet striker support plate  and 
fan  cowling  to the  wing  sides. 
26.  Tighten the  lower condenser  bracket bolts. 
27.  Adjust  the condenser  position 
with the bonnet 
striker support  bracket assembly to  obtain an equal 
distance  from 
the radiator.  Tighten the  four  side 
mounting  bolts. 
28. Tighten the four nuis and washers  which sccure the 
fan cowling mounting. 
29. Reconnect  the  electrical wiring for the  fan 
assemblies, 
horn and receiveddrier. 
30. Recheck the  security of all fixings. 
31.  Refit  the front  nose and grille  assembly  and secure. 
32.  Evacuate,  sweep and charge  the  air conditioning 
20 
system  as previously  described. 
Heater matrix and blower  motor only 
3. Remove  the caps  from  the compressor  service 
4. Disconnect  the  low pressure  valve from thc 
compressor  and  cap both  ends to  prevent  dirt or 
moisture  entering the system. 
5. Using  two  suitable  spanners remove the high 
pressure  pipe  from  the  evaporator  side. Cap both 
ends  to  prevent dirt 
or moisture  entering  the 
system.  valves 
and close  (turn  clockwise) fully. 
/-% 
>--. 
Evaporator matrix  and expansion valve only 
6.  Remove the caps  from  the Compressor  service 
valves  and connect  the gauge  set for evacuating. 
described. 
8. Open the  compressor  service valves and disconnect 
the  gauge  set. Cap  all pipes  and gauge connections 
9. Release  the fixings  and remove  the expansion  tank 
to  provide  access to the  air conditioning  high and 
low  pressure  pipes. 
7 r- .^^..^ +... &L,. -:.. -,.-,4:+:--:-* r.,r+om op *v,=.,,;n,,ci,, /. CVdLU41G LIIG U11 LUllUlllul~1~l~ 3ya~c.111 LLJ yncvnvuo~~ 
d- :- to prevent  dirt or moisture entering  the system. f, -::: k;d  
						

							AIR CONDITIONING - L.H. STEERING 
:.- 10. Whilst supporting  both  unions with suitable 
spanners  unscrew the high  and low pressure  air 
conditioning pipes 
to the evaporator.  Cap the pipe 
ends  and evaporator  inlets to prevent  dirt  or 
moisture  entering the  system. 
18. Remove the  screw,  releasing the relay connector 
block. 
19. All wiring on the  top  of the  evaporator  is now 
disconnected with the exception of the earth lead, 
this 
is disconnected when  the evaporator mounting 
block  is removed. 
20. Using  suitable  pipe clamps,  clamp  the inlet  and 
outlet  coolant  pipes at the  base 
of the  evaporator 
and  release  the  two  jubilee  clips and  detach,  or 
drain  the radiator. 
.. , 
* 
Evaporator unit 
11. Disconnect  the electrical  leads fcedine  the 
h 
82 
 
21. From inside  the vehiclc  remove the  front passenger 
carpet  and self tapping  screws which retain 
the 
toe-board. Remove the toe-board. 
compressor 
clutch cycling  switch. 
switch. 
and  withdraw  it. 
12. Detach the vacuum  pipes from  the  water valve 
13. Remove  the fixings  securing the water  valve  switch 22. Release two bolts, 
14. Remove  the  clip and  cable  connection  from  the 
evaporator  heater flap rod.  Use a new  clip 
on 
reassembly. 
15. Release  the nylon  cable retainer. 
16. Detach  the  heater  electric  supply  lead  at the 
17. Remove  the  relay from its connecting  block 
connecting 
block. 
revealing 
one self  tapping  screw. 
23. From inside  the  engine  compartment  remove the 
two  upper  evaporator  mounting  block bolts  fitted 
to  the  engine  bulkhead.  This also releases  the 
earthing  leads. 
24. Remove  the bolt securing  the angled bracket  at the 
front 
of the  evaporator  casing. 
21  
						

							IF1 AIR CONDITIONING - L.H. STEERING 
ST1416M 
e42 
45 
22