Troubleshootin
90
W9212-8235-4
03/2019
TROUBLESHOOTING
The troubleshooting section includes only malfunctions and incorrect operations which must be remedied by
the operator. Any other malfunctions may only be eliminated by trained personnel. The troubleshooting must be
performed with the aid of the troubleshooting table. In order to locate a malfunction, first look in the
MALFUNCTION column for the corresponding excavator malfunction. In the POSSIBLE CAUSE column you
will find the possible causes for the malfunction. The REPAIR column indicates the required remedial measure.
If the fault can not be remedied by the measure indicated in the REPAIR column, consult trained personnel.
In order to resolve malfunctions related to the operation, use or maintenance of the exhaust
purification system, implement the measures immediately in accordance with the troubleshooting
table.
Safety rules for troubleshooting
Adhere to the general safety rules (page 10) and the safety rules for operation (page 52).
The operator is not allowed to open the electrical and hydraulic system. These services are reserved for trained
personnel.
During troubleshooting, the safety on and around the excavator must always be ensured.
If troubleshooting of the excavator calls for the bucket being raised, the operator may not stand in the area of
the front attachments unless the front attachments are secured against inadvertent lowering by suitable
measures.
Troubleshooting: Pre-operational services
MALFUNCTION POSSIBLE CAUSE REPAIR
Start-up
No function available when the
starter switch is turned to the RUN
position
Main fuse defective Replace the main fuse (page 88).
Indicator lights do not come on as
expected when the starter switch is
turned to the RUN position
Defective fuse Replace the fuses (page 88).
Starter does not turn when the
starter switch is turned to the
START position
Battery depleted Charge the battery (page 108).
Jump-start the excavator
(page 85).
Engine does not start when the
starter switch is turned to the
START position, but starter turns
Air in the fuel system Check the fuel system for leaks
and bleed it (page 87).
Water in the fuel system Check the water separator for
water content, drain if necessary
(page 58).