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AIR SYSTEM AND BRAKES
TROUBLESHOOTING PROCEDURES

Scraper, Earth Moving, Motorized, Diesel Engine Driven Model 621B
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TM 5-3805-248-10
TROUBLESHOOTING SYMPTOM INDEX - CONTINUED
0011 00
Troubleshooting Procedure Page
Malfunction/Symptom
SCRAPER SYSTEM
1.
Bowl Control Lever Binds. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0012 00-11
2.
Ejector Control Lever Binds. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0012 00-11
3.
Apron Control Lever Binds.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0012 00-11
4.
Bowl Drifts After Control Lever Is Released or Centered. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0012 00-11
5.
Travel Time of Bowl Lift Cylinders Is Slow.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0012 00-11
6.
Travel Time of Ejector Is Slow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0012 00-12
STEERING
1.
Machine Steering Slow or Intermittent to Respond. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0012 00-12
2.
Machine Turns Correctly During Normal Driving Conditions, but Turns Slowly with a Load. . . . . . . 0012 00-12
3.
Machine Turns Slowly in Both Directions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0012 00-12
4.
Machine Turns Slowly in One Direction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0012 00-12
5.
Machine Slowly Drifts (Either Direction), Wanders or Pulls to One Side on Level Pavement,
Even When Steering Wheel Is in Straight Position. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0012 00-12
6.
Steering Is Erratic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0012 00-13
7.
Turning Steering Wheel Is Difficult. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0012 00-13
TRANSMISSION
1.
Machine Moves When Shift Lever Is in Neutral (N). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0012 00-13
2.
Slow or Erratic Transmission Engagement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0012 00-13
3.
Torque Converter/Retarder Oil Temperature Gage Is Registering in Red (Indicates
Overheating During Normal Operation). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0012 00-13
4.
Transmission Does Not Operate in Any Speed.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0012 00-14
5.
Transmission Cannot Be Shifted Out of Neutral. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0012 00-14
6.
Transmission Does Not Shift from One Speed to Another. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0012 00-14
7.
Transmission Engages, but Machine Does Not Move. Engine Stops Running. . . . . . . . . . . . . . . . . . . 0012 00-14
8.
Transmission Shifting Is Rough. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0012 00-14
END OF WORK PACKAGE
0011 00-2


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