Operational Checkout Procedure TM2361 (24JUN08) 9005-10-17 450DLC Excavator Operation and Tests 062608 PN=233 Hydraulic Oil Tank Pressurization Check 1—Hydraulic Oil Tank Pressure Release Button 2—Hydraulic Oil Tank Cover Raise boom to full height, then lower boom to ground. Slowly depress pressure release button on hydraulic oil tank cover. LISTEN: Is air heard escaping from the pressure release TX1000859 –UN–01DEC05 button on hydraulic oil tank cover? IMPORTANT: The pressurized oil tank creates pressure at the inlet to the hydraulic pumps. If tank cover does not seal, hydraulic pumps could cavitate and be damaged. YES: Go to next check. NO: Replace hydraulic oil tank cover.
– – –1/1 9005 10 17 Swing Dynamic Braking Check T6479AY –UN–19OCT88 TX1000170 –UN–10NOV05 1—Engine Speed Dial 2—Auto-Idle Switch 3—Power Mode Switch CAUTION: Make sure area is clear and large enough to swing extended arm and bucket. Machine must be on level ground. Position upperstructure with boom to the front. Move arm to the extended position, bucket to the retracted position, and bucket-to-arm pivot pin at same level as boom-to-frame pivot pin. Turn engine speed dial (1) to H (fast idle) position. Turn power mode switch (3) to P (power) mode. Fully actuate swing function. Swing clockwise 90 degrees and then release lever. LOOK:
Does upperstructure stop within 45 degrees (1/8 turn) or less after releasing lever? Position upperstructure with boom to the front. Fully actuate swing function. Swing counterclockwise 90 degrees and then release lever. LOOK: Does upperstructure stop within 45 degrees (1/8 turn) or less after releasing lever? YES: Go to next check. NO: Perform Swing Motor Leakage Test (Group 9025-25.) and perform Swing Motor Crossover Relief Valve Test and Adjustment. (Group 9025-25.) NO: Check swing valve spool and spring. See Control Valve 5 Spool Disassemble and Assemble. (Group 3360.) – – –1/1