To determine if faulty thermostats are causing low engine coolant temperature, perform the following:
- Remove thermostat from the thermostat housing; refer to "4.3.2 Draining and Removal of Thermostat" .
- Inspect thermostat for correct operation; refer to "220.127.116.11 Inspection of Thermostat"
- If thermostat did not open at 97°C (207°F), refer to "28.1.1 Thermostat Replacement" .
Perform the following steps to replace thermostats:
- Install new thermostat; refer to "4.3.4 Installation of Thermostat and Seal" .
- Verify replaced thermostat; refer to "18.104.22.168 Test Engine with New Thermostat" .
Test Engine with New Thermostat
Perform the following to determine if thermostat replacement resolved low engine coolant temperature:
- Start and run the engine.
- Run the engine through its operating range with no-load for approximately 5 minutes, allowing the engine coolant to reach normal operating range.
- If the engine coolant temperature is 88-96°C (190-210°F), no further troubleshooting is required. Shut the engine down.
- If the engine coolant temperature is not 88-96°C (190-210°F), shut the engine down.. Contact DDC Technical Service.
|Series 50 Service Manual - 6SE50|
|Generated on 10-13-2008|