Refrigeration Service Operations
142
14. Measure oil removed and add an equal amount
or add 40 oz (1.2l) of compressor oil (see Tool
Catalog), by pouring oil into the oil filter
cavity.
NOTE: The gasket must be replaced (see Parts
Manual).
Temperature Thermister Change
Procedure
NOTE: Thermo King recommends changing the
temperature thermister whenever the insulation
on the leads has been broken or there is other
reason to suspect a defective thermister.
The steps for changing the high temperature
cutout thermister are as follows:
1. Cut through silicone sealant surrounding
plastic cap.
2. Pry plastic cap out of top cap.
3. Remove thermister by pulling it out of top cap
well.
4. Clean all debris out of top cap well and off of
top cap surface.
5. Apply 0.25 to 0.50 cubic centimeters of
thermally conductive silicone grease (p/n
CHEMPLEX 1381 Heatsink Silicone into
thermal well.
6. Apply RTV to underside of plastic cap and
insert thermister back into well.
Liquid Injection Fitting Change
Procedure
The steps for changing the liquid injection fitting
are as follows:
1. Recover refrigerant. Equalize pressure to
slightly positive.
2. Clean compressor body in area of liquid
injection fitting.
3. Sweat tubing out of liquid injection fitting.
4. Visually inspect screen in liquid injection
fitting.
5. If plugged, carefully remove liquid injection
fitting from compressor body.
6. Install new o-ring on new liquid injection
fitting.
7. Lubricate new o-ring with Mobil
TM
oil (see
Tool Catalog).
8. Carefully thread new liquid injection fitting
through compressor body into steel block on
the inside. Make sure the fitting is not
cross-threaded in the steel block.
9. Torque liquid injection fitting to 100 to 120
in-lb (11.2 to 13.6 N•m).
10. Re-attach tubing to liquid injection fitting.
11. Pressurize the unit and check for leaks.
12. Evacuate the unit and recharge system.
Condenser/Radiator Coil
Removal
1. Recover the refrigerant charge by approved
methods.
2. Remove the grille assembly.
3. Drain engine coolant from the expansion tank
and disconnect the coolant hoses from the
condenser/radiator coil.
4. Unsolder the hot gas inlet tube and liquid
refrigerant line connections.
Other Parts Which May Be Used (As Needed)
Are:
SAE Plug See Parts Manual
Torx Head Screws See Parts Manual
Cover Plate See Parts Manual
Spring See Parts Manual
Screen See Parts Manual
Screen Cover See Parts Manual
Parts List (As Needed)
Thermister Assembly See Parts Manual
Silicone Sealant N/A
RTV See Tool Catalog
Parts List (As Needed)
O-ring See Parts Manual
Liquid Injection Fitting See Parts Manual
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