TM2361 (24JUN08) 9005-10-22 450DLC Excavator Operation and Tests 062608 PN=238 Operational Checkout Procedure Control Valve Lift Check YES: See Load Falls Test When Control Valve Is Actuated To Raise Load With Engine Running At Slow Idle. (Group 9025-15.) NO: Go to next check. T6292AZ –UN–19OCT88 TX1000874 –UN–01DEC05 1—Engine Speed Dial 9005 Turn engine speed dial (1) to L (slow idle) position. 10 22 Position machine as shown. Slowly lower boom, extend arm (retract cylinder), and dump bucket (retract cylinder). LOOK: Do functions move in opposite direction as pilot control levers are first moved, then change direction as levers are moved farther?
– – –1/1 Operational Checkout Procedure Control Valve Lift Check Test T6292AZ –UN–19OCT88 TX1000874 –UN–01DEC05 1—Engine Speed Dial Turn engine speed dial (1) to L (slow idle) position. Position machine as shown. Slowly lower boom, extend arm (retract cylinder), and dump bucket (retract cylinder). LOOK: Do functions move in opposite direction as pilot control levers are first moved, then change direction as levers are moved farther? YES: See Load Falls When Control Valve Is Actuated To Raise Load With Engine Running At Slow Idle. (Group 9025-15.) NO: Go to next check. – – –1/1 9005 10 22 Boom Mode Switch 4—Boom Mode Switch With the boom mode switch turned ON. LOOK/FEEL:
Can the machine be raised off the ground with the front attachment? With the boom mode switch turned OFF. TX1005670 –UN–29MAR06 LOOK/FEEL: Does the machine remain on the ground with the front attachment activated? YES: Go to next check. NO: See Boom Mode Circuit Operation (Group 9025-05.) and perform Boom Mode Solenoid Valve (port SC) Test and Adjustment. (Group 9025-25.) – – –1/1 Boom Up, Arm In, and Bucket Combined Function 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. Actuate boom up function, arm in function, and then bucket function in combination.
TX1000170 –UN–10NOV05 LOOK: Does boom continue to move at approximately the same speed after bucket function is actuated? YES: Go to next check. NO: If boom speed slows excessively, inspect bucket flow rate control valve. See Control Valve Remove and Install (Group 3360.) and see Control Valve 4 Spool Disassemble and Assemble. (Group 3360.) – – –1/1