TM2361 (24JUN08) 9010-25-13 450DLC Excavator Operation and Tests 062608 PN=309 Tests 4. Disconnect both pump pressure sensors (1). 5. Turn engine RPM dial to fast idle. 6. Turn work mode switch to HP position. –UN–21APR06 Specification Work Mode Switch—Position................................................................ HP Specification TX1006587A Engine Rated Speed—Speed................................................... 1800 RPM NOTE: If using the JT07248 Turbo Boost Kit, a check valve at the pressure gauge inlet traps the highest 1—Pump Pressure Sensor (2 used) reading for boost pressure and does not decrease as the pressure decreases. 7.
Slowly actuate boom up function over relief until engine rpm pulls down from fast idle to below 1800 RPM. Record highest reading. Repeat this step at least six times. 8. Record the highest pressure reading. 9. Compare highest reading to specifications. Specification Turbocharger Boost—Pressure.............128 kPa (1.28 bar) (17 psi) using No. 2 fuel —Pressure............................................ 110.3 kPa (1.1 bar) (16 psi) using No. 1 fuel IMPORTANT: Pressure gauge accuracy is very critical for this test. Do not make adjustments to injection pump fuel delivery on the machine to raise or lower boost pressure. New engine may not develop specified boost pressure.
Check after 50 hours of operation. 10. If turbocharger boost pressure is low, check the following: • Wrong fuel. • Restricted air filter elements.See Air Cleaner Remove and Install. (Group 0520.) Continued on next page JC89288,0000196 –19–24APR06–3/4 9010 25 13