Thermo King KD-II SR, Manual

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Refrigeration Service Operations (Rev. 04/03)
108
7. Operate the unit at least 30 minutes and then inspect the
oil level in the compressor. Add or remove oil if neces-
sary.
8. Check the refrigerant charge and add refrigerant if
needed.
CONDENSER/RADIATOR COIL
Removal
1. Remove the refrigerant charge.
2. Remove the grille assembly.
3. Drain engine coolant from the expansion tank and dis-
connect the coolant hoses from the condenser/radiator
coil.
4. Unsolder the hot gas inlet tube and liquid refrigerant
line connections.
5. Unbolt and remove the condenser/radiator coil
Installation
1. Clean the tubes for soldering.
2. Place the coil in the unit and install the mounting hard-
ware.
3. Solder the inlet line and liquid line refrigerant connec-
tions.
4. Pressurize the refrigeration system and test for leaks. If
no leaks are found, evacuate the system.
5. Connect the coolant hoses to the radiator and refill the
expansion tank with 50/50 ethylene glycol/water solu-
tion.
6. Recharge the unit with refrigerant and check the com-
pressor oil.
7. Reinstall the front grille.
LIQUID LINE CHECK VALVE
REPLACEMENT
Removal
1. Remove the refrigerant charge.
2. Unsolder the lines and remove the check valve.
NOTE: Disassemble valve before unsoldering.
Installation
1. Clean the tubes for soldering.
2. Place the disassembled check valve in position. Arrow
on the valve body indicates the direction of refrigerant
flow through the valve.
3. Solder the inlet and outlet connections. After the valve
cools, reassemble the valve.
4. Pressurize the refrigeration system and test for leaks.
5. If no leaks are found, evacuate the system.
6. Recharge the unit with refrigerant and check the com-
pressor oil.
DEHYDRATOR (FILTER-DRIER)
Removal
1. Pump down the refrigeration system and equalize the
pressure to slightly positive 1 to 2 psig (7 to 14 kPa).
2. Disconnect the nuts at the end of the drier.
Hold the drier with a backup wrench on the hex behind
the flare fitting.
3. Loosen the mounting hardware and remove the drier.