CONTENTS
1. TROUBLESHOOTING.................................................................................................................9-S1
2. SERVICING SPECIFICATIONS ..................................................................................................9-S5
3. TIGHTENING TORQUES............................................................................................................9-S6
4. PRECAUTIONS AT REPAIRING REFRIGERANT CYCLE.........................................................9-S7
[1] HANDLING OF SERVICE TOOLS ........................................................................................9-S8
(1) Manifold Gauge Set.........................................................................................................9-S8
(2) Refrigerant Charging Hose............................................................................................9-S10
(3) Vacuum Pump Adaptor .................................................................................................9-S11
(4) Electric Gas Leak Tester ...............................................................................................9-S11
(5) Can Tap Valve...............................................................................................................9-S11
(6) T-joint.............................................................................................................................9-S12
(7) R134a Refrigerant Recover and Recycling Machine.....................................................9-S12
5. CHECKING AND CHARGING REFRIGERANT CYCLE ...........................................................9-S13
[1] CHECKING WITH MANIFOLD GAUGE ..............................................................................9-S13
[2] DISCHARGING, EVACUATING AND CHARGING .............................................................9-S18
(1) Discharging the Refrigerant...........................................................................................9-S18
(2) Evacuating the System..................................................................................................9-S19
(3) Charging the Refrigerant ...............................................................................................9-S20
(4) Checking Charge Refrigerant Amount...........................................................................9-S22
6. CHECKING, DISASSEMBLING AND SERVICING ...................................................................9-S23
[1] CHECKING AND ADJUSTING............................................................................................9-S23
(1) Compressor ...................................................................................................................9-S23
(2) Relay (A/C Compressor, Front Working Light, Front Wiper, Blower, Blower Hi,
ACC, Auxiliary Power) ...................................................................................................9-S23
(3) Wiper Relay ...................................................................................................................9-S24
(4) Control Panel (Blower Switch, A/C Switch, Mode Control Dial, Temperature
Control Dial and Recirculation/Fresh Air Selection Switch)...........................................9-S25
(5) Blower Resistor .............................................................................................................9-S28
(6) Blower Motor .................................................................................................................9-S28
(7) Temperature Motor........................................................................................................9-S29
(8) Mode Motor ...................................................................................................................9-S29
(9) Recirculation/Fresh Air Motor ........................................................................................9-S30
(10)Pressure Switch ............................................................................................................9-S31
(11)Front Wiper Switch........................................................................................................9-S32
(12)Front Wiper Motor .........................................................................................................9-S32
(13)Rear Wiper Switch (If equipped) ...................................................................................9-S33
(14)Rear Wiper Motor (If equipped).....................................................................................9-S33
[2] DISASSEMBLING AND ASSEMBLING ..............................................................................9-S34
(1) Separating Cabin from Tractor ......................................................................................9-S34
(2) Removing Compressor Assembly .................................................................................9-S42
(3) Removing Air Conditioner Unit ......................................................................................9-S45
(4) Removing Air Conditioner Hose ....................................................................................9-S48
(5) Removing Heater Hoses ...............................................................................................9-S51
(6) Cab Windshield .............................................................................................................9-S52
(7) Wiper Motor ...................................................................................................................9-S55
[3] SERVICING.........................................................................................................................9-S56
SERVICING
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