Thermo King SB-190 30, Manual

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Engine Maintenance (Rev. 12/03)
39
Changing the Antifreeze
1. Run the engine until it is up to its normal operating
temperature. Stop the unit.
Checking the Antifreeze
Check the solution concentration by using a temperature
compensated antifreeze hydrometer or a refractometer (P/N
204-754) designed for testing antifreeze. Maintain a mini-
mum of 50% permanent type antifreeze concentrate and
50% water solution to provide protection to -34 C (-30 F).
Do not mix antifreeze stronger than 68% permanent type
coolant concentrate and 32% water for use in extreme tem-
peratures.
1. Expansion Tank 5. Thermostat
2. Radiator Cap 6. Bypass Hose
3. Radiator 7. Coolant Level Sensor
4. Thermostat Housing
AJA898
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