1973 OPEL 1900 instrument panel

96-54 1973 OPEL SERVICE MANUAL
valve. The filter screen at the inlet port may be re-
placed. Remove screen by threading a lo-32 NF
screw into old filter screen. With a washer and a nut
on the screw arranged to work as a puller screw, hold
the body of the screw and turn the nut. Insert the
new filter screen into the inlet port and lightly tap
screen only enough to seat.
1. Install expansion valve using new o-rings during
installation. Lubricate o-rings prior to installation
using No. 525 viscosity oil.
2. Install evaporator assembly and case attaching
screws. See Figure 9B-70.3. Install blower motor assembly into case and se-
cure with attaching screws. See Figure
9B-69.4. Install finger guard shields and fan housing case.
See Figure
9B-69.5. Install resistor assembly and electrical connector.
Install blower motor connector. See Figure
9B-69.6. Install assembly into car carefully guiding
evaporator pipes up through cowl opening. See Fig-
ure
9B-71.Figure 93-7 1 Inlet and Outlet Pipes and O-Rings
-Opel 1900 Manta
7. Install two (2) upper attaching evaporator at-
taching nuts. See Figures 9B-66 and
9B-67.8. Install two (2) attaching case mounting bracket
to instrument panel screws. See Figure
9B-67.9. Connect two (2) drain hoses underneath evapora-
tor.10. Install evaporator inlet and outlet pipes retainer
and rubber grommet. See Figure
9B-65.11. Connect vacuum cut-off switch and electrical
wiring, making sure the delay restrictor and checkvalve hoses are installed correctly. See Figures
9B-63and 64.
.gB-72 Delay Restrictor and Check Valve Hose.Assembly
12. Install refrigerant hoses and pipes using new
o-rings on line fittings and evacuate system. Refer to
EVACUATING SYSTEM.
13. While system is being evacuated, install in-line
fuse and left side of distributor duct. See Figure 9B-
61.14. Install glove box.
15. Install negative battery cable and charge system.
Refer to CHARGING SYSTEM.
REMOVAL AND INSTALLATION OF CONDENSER
ASSEMBLY -OPEL 1900. MANTA
Removal
1. Remove negative battery cable from battery.
2. Remove air cleaner.
3. Discharge system. Refer to DISCHARGING
SYSTEM.
4. While system is discharging, remove lower radia-
tor hose from radiator and drain coolant into a suita-
ble container.
5. Remove fan shroud.
6. On vehicles with automatic transmission, un-
screw oil lines from connectors on lower radiator
tank and plug lines. It is essential that no dirt enters
the oil lines. When unscrewing oil lines, hold connec-
tors on lower radiator tank with pliers to avoid leak-
ages. Ensure that no dirt enters oil cooler.
7. Remove upper radiator hose from radiator.
8. Remove lower attaching nut and slide radiator
upward and out of engine compartment.
9. Remove inlet and outlet hoses from condenser

98.94 1973 OPEL SERVICE MANUAL
7. Remove 2 upper evaporator attaching nuts. See
Figures 9B-178 and 9B-181.
Figure 98-181 Location of Upper Evaporator
Attaching Bolt (Right Side)
8. Remove 2 attaching case mpunting bracket to
instrument panel screws. See Figure 9B-182.
Figure SB-182 Evaporator and Blower AssemblyBrackets and Attachments9. From underneath evaporator case, disconnect
two (2) drain hoses.lo. Carefully
PXIIOVS assembly from car. See Figure
9B-184.
11. Disconnect resistor electrical connector and
remove resistor assembly. See Figure
9B-184.12. Remove the blower case and blower motor at-
taching screws and remove assembly. See Figure 9B-
184.Installation
1. Install the blower motor assembly into caseFigure 98-183 Drain Hose
BLOWER MOTOR
Figcre 98.184 Assembly Removed
bracket with the electrical connector side of the mo-
tor to the right side ofthe bracket. Attach the mount-
ing strap.
2. Assemble the case halves and attach the cover
plate.
3. Install the resistor assembly and electrical con-
nector. Install blower motor connector. See Figure
9B-184.4. Install assembly into car carefully guiding
evaporator pipes up through cowl opening. See Fig-
ure 9B-185.
5. Install 2 upper evaporator attaching nuts. See
Figures 9B-178 and 9B-181.
6. Install 2 attaching case mounting bracket to in-
strument panel screws. See Figure 9B-182.

5. If the low side pressure was less than the pre-
scribed pressure at the end of each cooling cycle, turnthe adjusting screw a partial turn clockwise. See Fig-ure 9B-192.AIR CONDITIONER SYSTEM
- GT9B- 99
CONNECTOR
Figure 98.192 Adjusting Thermostatic Switch6. If the pressure was more than the prescribed
value, tuin the adjusting screw counter-clockwise.7. Reinstall switch end plate and install switch in
face plate. Install face plate on evaporator assembly
assuring
,that the air sensing capillary has been re-
placed properly.
Figure 98-l 93 Vacuum Switch8. Check system performance. Iffurther adjustment
is needed, repeat steps 3 thru 7 until the correct
pressure is reached.
REMOVAL AND INSTALLATION OF BLOWER
SWITCHDo not attempt to run a performance test with the
duct assembly and switch removed from the
evaporator assembly
- inaccurate readings will re-
sult. Always replace the switch and duct assemblies
before c+ecking the system performance.
Removal
MAJOFi REPAIR
1. Remove the negative cable from the battery2. Remove the retaining screws from the duct as-
sembly. See Figure
9B-190.3. Remove 2 blower switch rejaining screws and
remove blower switch.
REMOVAL AND INSTALLATION OF VACUUM
SWITCH,
Installation
Ramoval~1. Remove right trim pad below instrument panel.
2. Rembve two (2) screws and unplug the vacuum
hose and electrical connector. See Figure
9B-193.1. Install the blower switch and
secure with two (2)
retaining screws.
2. Install the duct assembly retaining screws.
3. Install the negative battery cable.
Installation1. Install two (2) screws and plug in electrical con-
nector and connect the delay restrictor and checkvalve
hose assembly.
I
REMOVAL AND INSTALLATIDN:OF
TEMPERATURE CONTROL SWITCH
Removal2. Install right trim pad.I. Remove the negative battery cable.

9C-108 1973 OPEL SERVICE MANUAL
11. Grasp instrument cluster and pull straight back,
being careful of wires, etc. See Figure 9C-7.
Figure 9C-7 Removing Instrument Cluster
12. Disconnect radio harness plug and antenna lead-
in cable from back of radio. See Figure
9C-8.
Figure 9C-8 Removing Radio Harness Plug
13. Remove radio knobs from radio.
14. While supporting radio, remove radio shaft re-
taining nuts. Remove radio. See Figure
9C-10.
CAUTlOk Fasteners in Installation are important at-
taching parts in that they could affect the perform-
ance of vital components and systems, and/or could
result in major repair expense. They must be re-
placed with one of the same part number or with an equivalent part, if replacement becomes necessary.
Do not use a replacement part of lesser quality or
substitute design. Torque values must be used
as
specified during reassembly to assure proper
reten;
tion of these parts.
Figure SC-10 Removing Radio Shaft Retaining Nuts
1. Install radio into instrument cluster and secure
with retaining nuts. See Figure
9C-10.
2. Plug radio harness and lead-in cable into radio.
See Figure
9C-8.
3. Install radio knobs and carefully push cluster back
into instrument panel housing, making sure electri-
cal wires, etc., are not pinched. See Figure
9C-7.
4. Install six (6) cluster retaining screws. See Figure
9C-6.
5. Support column assembly and install ground wire
and hex head bolts, torquing to
14 lb.ft.
6. Install NEW tear bolts and tighten until head of
bolt is twisted off.
7. Connect ignition and directional signal wire plugs.
8. Connect speedometer cable.
9. Install flasher unit and hex head screw. See Figure
9c-4.10. Install hex head screw through opening on right
side and install trim plug. See Figure
9C-2.
11. Install trim cover on left side. See Figure 9C-3.

Subject
Page NumbelSubjectPage Number4.Speed Manual I..
Clutch
Detent Cable Adjustment
:Differential
Directional Signal Switch
Repair Opel 1900 & Manta
Repair GT
:Disassembly of
4.Speed Manual Transmission
DistributorFunction of Valves and Hydraulic Control Units
Opel
3.Speed Automatic.................
74-21
Fuse Chart..............................lG-56
Fusible Link.............................
lA-8Specifications.
Point Replacement..
..,78-127A-
17c-9148-73E-393E-4878.23
1C-26
1 c-20
GEGas Tank See Fuel Tank
General Specifications
Engine...............................6A-28
Opel 3.Speed Automatic
.................7C-134
Transmission, Manual.,
..................78-33
Clutch...............................7A-7
Body................................ZA-4
Governor Drive Gear
Opel
3.Speed Automatic.................7C-103
Grille
Opel 1900 & Manta.....................8A-7
GT..................................8A-6 Electrically Heated Rear Window
Engine
General Description
Cooling System
Lubrication System
Trouble Diagnosis
Exhaust Manifold
Exhaust System
Removal and Installation
External Oil Leaks,
Opel 3 Speed Automatic
FFast Idle Adjustment
..................
Filter-Engine Oil
......................
Fluid Checking Procedure Transmission
Opel 3Speed Automatic.............
Frame-Opel 1900 & Manta.............
Frame
GT-Opel......................
SWVOOpel Xipeed Automatic...........
Front Suspension
Opel1900&Manta.................
GT..............................
Front Wheel Alignment................
Front Wheel Bearing Adjustment
All Series.........................
Fuel Gauge
Trouble Diagnosis
Opell$OO&Manta...............
GT............................
Fuel Pump Operation..................
Fuel System
Fuel Tank (Opel 1900 & Manta)
.......
Fuel Lines (Opel 1900 & Manta)
.......
Fuel Tank
(GT)....................
Fuel Gauge Tank Unit
(GT)...........
Fuel Lines
(GT)....................
Fuel Tank Removal and Installation....
Cleaning Tank.....................
lH-576A-268-326A-46A-66A-126D-427C-816E-51
oc-77C~Bl2B-826-77c-1003A-23A-23C-223A-4
HHazard Warning Flasher
....................lG-55
Headlamp Aiming
.........................1 F-46
Headlamp Switch
Opel 190.0 & Manta
.....................1 F-46
Headlamp Mechanism GT
..................8A-2
Heater System Opel 1900 &Manta
Trouble Diagnosis
......................9A-11
Description and Operation
................9A-10
Adjustments and Minor Service............9A-12
Removal and Installation
.................9A-12
Specifications..........................$A-16
Heater System GT
Trouble Diagnosis
......................9A-4
Description and Operation
................9A-2
Adjustments and Minor Service
............9A-4
Removal and Installation.................9A-5
Specifications..........................$A-9Horn
Operation.............................lG-54
Hydraulic Operation
Opel
3.Speed Automatic.................7C-64
IIdentification Number Vehicle...............
OA-1ldle.Adjustment
..........................6E-51
Inflation Pressures, Tires.
...................36-62
Ignition Coil
Specifications.
.........................
lC-26Identification, Engine
......................
OA-1Ignition System
Timing...............................
lC-20Instrument Panel Parts Removal