Test A - Detroit Diesel Series 60 EGR Technician Manual

TESTING PROCEDURES
NOTE:
If further repair, removal, and DDDL procedures are required when performing the testing
procedures, please refer to the Series 60 Service Manual, (6SE483) or contact the EDS
Support Line for DDDL specific questions.

Test A

Perform Test A as follows.
1. Remove the turbocharger to charge-air-cooler (CAC) pipe.
PRESSURIZED CHARGE COOLER SYSTEM
To avoid eye or face injury from flying debris, wear a face
shield or goggles.
2. Pressurize the CAC inlet to 30 psi using special tool TLZ00100 or equivalent.
3. Monitor the boost psi using DDDL.
[a] If the pressure is below 27 psi, visually inspect the CAC, hoses, and the delivery
tube for leaks.
[b] If the pressure is at 27 psi or higher, continue to step 4.
4. Activate EGR VPOD (PWM #2) to 90% using the DDDL.
5. Monitor the boost psi pressure for pressure drops when the EGR valve opens.
NOTE:
The pressure should have dropped significantly to approximately 9 psi.
[a] If the air pressure dropped to 9 psi, no further testing is required and Test A has
been completed.
[b] If the pressure only dropped slightly, perform step 6 through step 8.
6. Physically inspect the EGR valve for a mechanical failure. If the EGR valve is not
functioning correctly, replace the EGR valve.
7. Visually inspect the EGR cooler for restrictions. If the EGR cooler is restricted, replace
the EGR cooler.
8. Visually check the delivery pipe for restrictions. Clean the pipe as necessary to remove
restrictions.
All information subject to change without notice. (Rev. June 2005)
7SE60 0506 Copyright © 2005 DETROIT DIESEL CORPORATION
SERIES 60 EGR TECHNICIAN'S MANUAL
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