Operational Checkout Procedure TM2361 (24JUN08) 9005-10-23 450DLC Excavator Operation and Tests 062608 PN=239 Boom Regenerative Valve Operation Check 1—Engine Speed Dial 2—Auto-Idle Switch 3—Power Mode Switch Turn engine speed dial (1) to H (fast idle) position. Turn power mode switch (3) to P (power) mode. Raise boom and extend the arm to full extension. TX1000170 –UN–10NOV05 Actuate the boom down, then arm in and boom up functions in combined operation. LOOK: Does the boom move smoothly through the complete cycle down and up and not hesitate when it goes past the vertical position? YES: Go to next check. NO:
Check pump 1 and pump 2 delivery pressure sensors (B35 and B37) and boom up pressure sensor (B30). See Pressure Sensor Test. (Group 9015-20.) NO: Check boom regenerative valve. See Boom Regenerative Valve Circuit Operation (Group 9025-05.) and see Control Valve Remove and Install (Group 3360.) and see Control Valve 4 Spool Disassemble and Assemble. (Group 3360.) – – –1/1 9005 10 23 Arm Regenerative Valve Operation Check 1—Engine Speed Dial 2—Auto-Idle Switch 3—Power Mode Switch Turn engine speed dial (1) to H (fast idle) position. Turn power mode switch (3) to P (power) mode. Extend the arm to full extension and then lower boom so bucket is on the ground.
TX1000170 –UN–10NOV05 Actuate the boom up and arm in functions in combined operation. LOOK: Does the arm move smoothly through the complete cycle and not hesitate when it goes through the vertical position? YES: Go to next check. NO: Check pump 1 and pump 2 delivery pressure sensors (B35 and B37), arm in pressure sensor (B31), and boom up pressure sensor (B30). See Pressure Sensor Test. (Group 9015-20.) NO: Check arm regenerative solenoid valve. See Arm Regenerative Valve Circuit Operation. (Group 9025-05.) IF OK: Check arm regenerative valve. See Control Valve Remove and Install (Group 3360.) and see Control Valve 5 Spool Disassemble and Assemble. (Group 3360.) – – –1/1