CONTENTS
1. TROUBLESHOOTING...............................................................................................................10-S1
2. SERVICING SPECIFICATIONS ................................................................................................10-S5
3. TIGHTENING TORQUES..........................................................................................................10-S6
4. PRECAUTIONS AT REPAIRING REFRIGERANT CYCLE.......................................................10-S7
[1] HANDLING OF SERVICE TOOLS ......................................................................................10-S9
(1) Manifold Gauge Set.......................................................................................................10-S9
(2) Refrigerant Charging Hose..........................................................................................10-S10
(3) Vacuum Pump Adaptor ...............................................................................................10-S11
(4) Electric Gas Leak Tester .............................................................................................10-S11
(5) Can Tap Valve.............................................................................................................10-S11
(6) T-joint...........................................................................................................................10-S12
(7) R134a Refrigerant Recover and Recycling Machine...................................................10-S12
5. CHECKING AND CHARGING REFRIGERANT CYCLE .........................................................10-S13
[1] CHECKING WITH MANIFOLD GAUGE ............................................................................10-S13
[2] DISCHARGING, EVACUATING AND CHARGING ...........................................................10-S17
(1) Discharging the Refrigerant.........................................................................................10-S17
(2) Evacuating the System................................................................................................10-S18
(3) Charging the Refrigerant .............................................................................................10-S19
(4) Checking Charge Refrigerant Amount.........................................................................10-S21
6. CHECKING, DISASSEMBLING AND SERVICING .................................................................10-S22
[1] CHECKING AND ADJUSTING..........................................................................................10-S22
(1) Compressor .................................................................................................................10-S22
(2) Relay (A/C Compressor, Front Working Light, Front Wiper, Blower, Blower Hi,
ACC, Auxiliary Power) .................................................................................................10-S22
(3) Wiper Relay .................................................................................................................10-S23
(4) Control Panel (Blower Switch, A/C Switch, Mode Control Dial, Temperature
Control Dial and Recirculation/Fresh Air Selection Switch).........................................10-S24
(5) Blower Resistor ...........................................................................................................10-S27
(6) Blower Motor ...............................................................................................................10-S27
(7) Temperature Motor......................................................................................................10-S28
(8) Mode Motor .................................................................................................................10-S28
(9) Recirculation/Fresh Air Motor ......................................................................................10-S29
(10)Pressure Switch ..........................................................................................................10-S30
(11)Front Wiper Switch......................................................................................................10-S31
(12)Front Wiper Motor .......................................................................................................10-S31
(13)Rear Wiper Switch (If Equipped).................................................................................10-S32
(14)Rear Wiper Motor (If Equipped) ..................................................................................10-S32
[2] DISASSEMBLING AND ASSEMBLING ............................................................................10-S33
(1) Separating Cabin from Tractor ....................................................................................10-S33
(2) Removing and Disassembling Compressor Assembly................................................10-S42
(3) Removing Air Conditioner Unit ....................................................................................10-S44
(4) Removing Air Conditioner Pipes..................................................................................10-S47
(5) Removing Heater Hoses .............................................................................................10-S48
(6) Cab Windshield ...........................................................................................................10-S50
(7) Wiper Motor .................................................................................................................10-S52
[3] SERVICING.......................................................................................................................10-S53
SERVICING
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