Section8-Schematics
Operation & Maintenance Manual
Dingli Machinery
8-1
Schematics
8.1 General
This section contains schematics to be used for locating and correcting most of the operating
problems which may develop.
8.2 Troubleshooting
It should be noted that there is no substitute for a thorough knowledge of the equipment and
related systems.
It should be recognized that the majority of the problems arising in the machine will be centered in
the hydraulic and electrical systems.
The first rule for troubleshooting any circuit that is hydraulically operated and electrically controlled
is to determine if the circuit is lacking hydraulic oil and electrical control power. This can be
ascertained by overriding the bypass valve (mechanically or electrically) so that oil is available to
the function valve, then overriding the function valve mechanically. If the function performs
satisfactorily, the problem exists with the control circuit.
8.3 Hydraulic Circuit Checks
The best place to begin the problem analysis is at the power source (pump). Once it is determined
that the pump is serviceable, then a systematic check of the circuit components, beginning with
the control, would follow. For aid in troubleshooting, refer to the
followed hydraulic schematics
and Electric schematics.
Section
8
