Check as follows: Remove the water pump; refer to the EPA07 DD15 Workshop Manual (DDC-SVC-MAN-0002), cooling system chapter. Inspect the pulley, shaft, and impeller for damage. If…
Check as follows: Inspect thermostat for correct operation. Three different operating conditions occur due to the coolant inlet temperature: Bypass mode: When the coolant inlet temperature…
Check as follows: Test the thermo-modulated fan; refer to OEM guidelines. If the thermo-modulated fan is functioning correctly, check thermostats; refer to “11.7 Faulty Thermostat” . If…
To determine if faulty thermostats are causing low engine coolant temperature, perform the following: Inspect thermostat for correct operation. Three different operating conditions occur due…
Different engine noises that are heard when a problem occurs are listed in the following table. Type of Noise Check the Following: Whining Noise Gear…
Use this procedure to determine the cause of poor engine brake performance when no codes are present. Check as follows: Check the oil pressure…
Check as follows: Check fuel level and correct if necessary. Use DDDL to check for stored or active codes and repair if necessary. Using DDDL,…
Drain system as follows: Remove the fuel feed line from the fuel filter module. Install J-48710 fuel pressure test kit onto the fuel feed line…
This procedure will allow the low pressure fuel system to be monitored using pressure gauges. Place a towel or container under the fitting for the…
This condition will exist if there is an external or internal leak of the low pressure fuel system. Tool J-48710 is required for this testing. Test as…