Jungheinrich DFG 320 Operating Instructions Manual page 79

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If the truck cannot be restored to operation despite carrying out the remedies above,
please contact the manufacturer's service department.
Additional troubleshooting must only be performed by the manufacturer's specialist
service engineers. The manufacturer has a customer service department specially
trained for these tasks.
In order for Customer Services to react quickly and specifically to the fault, the
following information is essential:
-Truck serial number
-Fault description
-Current location of truck
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