Repair manual
88
14.1.4 -Steering system
14.1.5 -Turntable rotation system
NB:
In the turntable box, LEDs indicate the state of each output so
that you can check if an output is activated.
14.2 - BREAKDOWN DETECTION FLOW CHART
ANOMALY
PROBABLE CAUSE
SOLUTION
No steering movement (right
and/or left) on the front axle
• Electrovalve YV22 or YV2 defective
• Coil defective
• Electronic module U1 defective
• Wiring harness defective
• Printed circuit defective
• Switch SA12 defective
No steering movement (right
and/or left) on the rear axle
• Electrovalve YV21 or YV2 defective
• Coil defective
• Electronic module U1 defective
• Wiring harness defective
• Printed circuit defective
• Travel switch SM4 defective
ANOMALY
PROBABLE CAUSE
SOLUTION
No turntable rotation move-
ment (right and/or left) from
the platform (or turntable)
control station
• Electrovalve YV5 defective
• Electronic module U1 defective
• Wiring harness defective
• Printed circuit defective
• Rotation switch SA15 defective
• Rotation manipulator SM31 defective
The turntable does not turn
• The blocking pin has not been removed
from the chassis
• Remove the pin
Summary of Contents for HA20PX
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Page 10: ...Repair Manual vi 15 CORRECTIVE MAINTENANCE PROCEDURES 177...
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Page 47: ...Repair manual 135 41 7 SAFETY LOCATION...
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Page 51: ...Repair manual 135 45 8 1 3 Positions of fuses 19 22 26 27 23 25 24 21 20...
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Page 248: ...CORRECTIVE MAINTENANCE SHEET Folio 2 2 CHANGING THE HYDRAULIC PUMP Sheet C091 7 6 3 3 1 2 4 5...
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Page 265: ...CORRECTIVE MAINTENANCE SHEET Folio 3 3 CHANGING THE SLEW RING Sheet C106 12 13 11...
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Page 274: ...CORRECTIVE MAINTENANCE SHEET Folio 2 2 CHANGING THE JIB CYLINDER Sheet C115 2 4 3 5 1...
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Page 282: ...CORRECTIVE MAINTENANCE SHEET CHANGING THE COUNTERWEIGHTS Sheet C134...