Operational Checkout Procedure TM2361 (24JUN08) 9005-10-11 450DLC Excavator Operation and Tests 062608 PN=227 Reversing Cooling Fan Switch—If Equipped NOTE: The pilot control shut-off lever must be in the LOCKED (rearward) position, for the reversing cooling fan to operate. IMPORTANT: Air conditioner may be damaged if the reversing cooling fan switch is pressed when using the air conditioner. Turn air conditioned off while performing this check. TX1005664 –UN–31MAR06 TX1000874 –UN–01DEC05 1—Engine Speed Dial 9—Reversing Cooling Fan Switch Pilot control shut-off lever in the LOCK position. Turn engine speed dial (1) to H fast idle with auto idle A/I OFF. Push air conditioner switch OFF.
Press reversing cooling fan switch ON. LISTEN: Does engine speed go to slow idle? Does fan speed slow down? LOOK/LISTEN: After approximately 20 seconds, does engine return to fast idle, does the fan speed increase and rotate in reverse direction for approximately one minute? LISTEN/LOOK: Does engine speed go to slow idle? Does the fan speed slow for approximately 20 seconds? Does fan direction return to normal? LISTEN: Does engine return to fast idle? Does fan speed increase? YES: Go to next check. NO: See Reversing Fan Switch Harness (W16) Wiring Diagram (Group 9015-10.) and see Reversing Fan Switch Harness (W16) Component Location (Group 9015-10.) and see Cab Harness (W1) Wiring Diagram.
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