Refrigeration Service Operations
104
Installation
1. Install and bolt the liquid injection valve
assembly in the unit.
2. Solder (95-5 Solder) the inlet liquid line and
the outlet line to the injection valve.
3. Solder (95-5 Solder) the inlet line to the valve.
4. Clean the dimple surface of the compressor
discharge line to a bright polished condition.
Install the feeler bulb clamps and the feeler
bulb on the bottom of the outlet line in its
former position. The feeler bulb must make
good contact with the outlet line or the
operation will be faulty. Wrap with sheet cork
and then wrap with asphalt cork.
5. Pressurize the unit and test for leaks. If no
leaks are found, evacuate the unit and
recharge.
6. Open the refrigeration valves and place the
unit in operation.
7. Test the unit to see that the valve is properly
installed.
Dehydrator (Filter-Drier)
Removal
1. Pump down the refrigeration system and
equalize the pressure to slightly positive.
2. Disconnect the nuts at the end of the drier.
3. Loosen the mounting hardware and remove
the drier.
Installation
1. Install the new drier and tighten the mounting
screws and nuts. Install new o-rings.
2. Install and tighten the inlet nut to the receiver
tank outlet valve line (inlet end of drier is
labeled “IN”). Hold the drier with a back-up
wrench on the hex behind the flare fitting.
3. Release a small amount of refrigerant to purge
the air through the drier. Then tighten outlet
nut on the dehydrator to the evaporator line.
4. Pressurize the system and inspect for leaks. If
no leaks are found, open the refrigeration
valves and place the unit in operation.
Evaporator Coil
Removal
1. Remove the refrigerant charge.
2. Remove the evaporator top panel.
3. Disconnect the expansion valve from the
distributor. Disconnect the air switch hoses.
4. Unsolder the suction line and drain pan hot
gas line from the evaporator coil.
5. Disconnect the electric heaters and high
temperature cutout switch on Model 50 units.
6. Remove the mounting bolts and slide the coil
from the evaporator housing.
1.
Compressor Outlet
2.
Capillary Tube Nesting in Dimple
3.
End View
Figure 61: Location of Injection Valve Bulb
1.
Side View
Figure 62: Completely Wrap Bulb with Tape
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...