Refrigeration Service Operations
107
High Pressure Cutout Switch
Removal
1. Front seat the three-way valve bypass check
valve
2. Start the unit and pump down the low side.
3. Stop the unit.
4. Shift the unit into heat using the relay board
test.
5. Disconnect the wires and remove the high
pressure cutout switch from the discharge
tube.
Installation
1. Apply a refrigerant Loctite
TM
to the threads of
the high pressure cutout switch.
2. Install and tighten high pressure cutout switch
and reconnect the wires.
3. Pressurize the refrigeration system and test for
leaks. If no leaks are found, evacuate the
system.
4. Open (back seat) the three-way valve bypass
check valve.
High Pressure Relief Valve
Removal
1. Remove the refrigerant charge.
2. Unscrew and remove the high pressure relief
valve.
Installation
1. Apply a refrigerant Loctite
TM
to the threads of
the high pressure relief valve.
2. Install and tighten the high pressure relief
valve.
3. Pressurize the refrigeration system and test for
leaks. If no leaks are found, evacuate the
system.
4. Recharge the unit with refrigerant and check
the compressor oil.
Pilot Solenoid
Removal
1. Recover refrigerant from the unit.
2. Disconnect the lines to the solenoid and
immediately cap to prevent moisture and air
from entering the system.
NOTE: The lines from the three-way valve to
the pilot solenoid will leak refrigerant at a
high velocity and should be capped.
3. Disconnect the electrical wires and remove the
pilot solenoid.
Installation
1. Replace the pilot solenoid in the unit.
2. Remove the caps from the lines and connect
lines to the pilot solenoid. Connect line from
the three-way valve first. Connect wires to the
valve.
3. Evacuate and charge the unit with refrigerant.
4. Open (back seat) the three-way valve bypass
check valve.
5. Check for leaks.
Receiver Tank
Removal
1. Remove the refrigerant charge.
2. Unsolder the inlet tube from the receiver tank.
3. Unsolder the filter drier line from the receiver
tank outlet tube.
4. Unbolt the mounting brackets and remove the
receiver tank from the unit.
Installation
1. Place the receiver tank in the unit and install
the mounting bolts and nuts loosely. Position
the receiver tank so the sight glass is clearly
visible and the outlet tube lines up.
2. Solder the inlet tube to the receiver tank.
Summary of Contents for 919180
Page 4: ...4...
Page 10: ...Table of Contents 10...
Page 32: ...Unit Description 32 Unit Photographs Figure 3 Front View Figure 4 Back View AJA584 AJA585...
Page 33: ...Unit Description 33 Figure 5 Left Side View Figure 6 Right Side View AJA586 AJA58...
Page 35: ...Unit Description 35 Figure 8 North American Power Receptacle Box AJA58...
Page 38: ...Unit Description 38...
Page 58: ...Electrical Maintenance 58...
Page 66: ...Engine Maintenance 66 Figure 37 Fuel and Oil System Components...
Page 84: ...Engine Maintenance 84...
Page 96: ...Refrigeration Maintenance 96...
Page 118: ...Hilliard Clutch Maintenance 118...
Page 136: ...Cycle Diagrams 136...
Page 140: ...Wiring and Schematic Diagrams Index 140...
Page 141: ...141 Truck S Model SR 30 Schematic Diagram Page 1 of 2...
Page 142: ...142 Truck S Model SR 30 Schematic Diagram Page 2 of 2...
Page 143: ...143 Truck S Model 30 Units with P T Wiring Diagram Page 1 of 2...
Page 144: ...144 Truck S Model 30 Units with P T Wiring Diagram Page 2 of 2...
Page 145: ...145 Truck S Model 50 Schematic Diagram Page 1 of 2...
Page 146: ...146 Truck S Model 50 Schematic Diagram Page 2 of 2...
Page 147: ...147 Truck S Model 50 Units with P T Wiring Diagram Page 1 of 2...
Page 148: ...148 Truck S Model 50 Units with P T Wiring Diagram Page 2 of 2...