Repair manual
87
14.1.3 -Travel system
ANOMALY
PROBABLE CAUSE
SOLUTION
No machine travel movement
• Connectors disconnected
• Manipulator HM4 defective
• Wiring harness defective
• Electronic module U1 defective
• Coils of electrovalve YV6 or YV7 defective
• Electrovalves YV6 or YV7 defectives
Only travel micro-speed
remains available on the
machine, regardless of the
speed selected
• Machine unfolded
• Contactors SQ2, SQ3, SQ4 incorrectly set
or defective
• Wiring harness defective
• Electronic module U1 defective
• Printed circuit defective
Fiche DP071
Machine travel speed does
not correspond to the selec-
tor
• Electrovalve YV8, YV10 or YV12 defective
• Coil of electrovalve YV8, YV10 or YV12 de-
fective
• Wiring harness defective
• Printed circuit defective
• Speed selector SA11 defective
• Electronic module U1 defective
Fiche DP069
Sudden stop of travel during
a platform lifting operation
• Contactors SQ3, SQ4, SQ2 incorrectly set
or defective
• Wiring harness defective
• Electronic module U1 defective
Fiche DP070
No differential blocking
during action on switch SA3
• Switch SA3 or SA11 defective
• Electronic module U1 defective
• Wiring harness defective
• Contactors SQ3, SQ4, SQ2 incorrectly set
or defective
• Printed circuit defective
• Coils of electrovalves YV9 or YV13
defective
• Electrovalves YV9 or YV13 defective
No grip on a drive wheel
• Insufficient load on one wheel
• Act on the blocking button
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 86: ...PREVENTIVE MAINTENANCE SHEET...
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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...