LiuGong CLG835H, Руководство по обслуживанию

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8-5
January 24, 2017 Basic Information
CLG835H Instructions of service manual
Basic Information
Instructions of service manual
The Manual is written by introducing the different
modules divided by the main functions of electri-
cal system, whereby, the maintenance opera-
tions of maintenance technicians are facilitated
as they are enabled to promptly find the chapters
and sections corresponding to the failure at any
time. Besides, the professional descriptions are
compiled to be accessible in the Manual, none-
theless, the maintenance personnel shall be pro-
vided with necessary professional knowledge to
understand the Maintenance Manual.
When dividing the modules, the Manual starts
from introducing the functions of the module,
then presents the main components of the func-
tions, including the principles, functions an elec-
trical diagrams of main components. Whereafter,
operation of module function and the diagnosis
and test of module failure are introduced.
The component symbols on the schematic dia-
gram indicate the representing methods of com-
ponents on the diagram. The majority of
component symbols signify the actual schematic
diagram of the components, whereas, the excep-
tions are specified when introducing the compo-
nents. It will help to judge the failure symptom of
components.
The component failure detection methods are
also included in the component descriptions
herein. In particular, such methods are only for
the components, whereby, the failures are
detected through dismounting the components
from the complete machine. As it is unfeasible to
detect the failures in accordance with the above-
mentioned methods if the components are
mounted on the complete machine. Then deter-
mine in line with the failure detection methods
described behind the system, or disassemble the
components if necessary, to judge the condition
of components based on the component trouble-
shooting method.
The module failure diagnosis and test introduced
in the Manual does not cover all the faults, thus
please rack your brain and focus on the accumu-
lation of experience during the troubleshooting.
In order to describe the electrical principles intui-
tively, colored filling lines are applied to present
the current flow when introducing the electrical
system principles in the Manual.
Full consideration to the relationship between the
general and the individual (system and compo-
nent) when determining the failures will contrib-
ute to the rapid, accurate and facilitated
troubleshooting.
On condition that digital multimeter (hereinafter
referred to as DMM) is applied to detect faults,
the inherent measuring errors might result in a
value slightly differing from that described in the
Manual. For instance, when selecting the 200
Ω
of Ω gear of DMM, the values described in the
Manual are comparable through shorting out the
red and black probes, measuring the lead resis-
tance and subtracting such lead resistance from
the measured resistance of other circuits.
Notes for welding
Be sure to comply with the correct welding pro-
cedures, so as to safeguard the electrical com-
ponents and bearings against potential
damages. When welding on a loader or diesel
engine equipped with electrical components,
please follow the operating steps below:
1. Place machine on level ground.
2. Put the electrical lock at "OFF" position, and
shut down the diesel engine.
3. Pull up the handbrake.
4. Turn off the battery disconnect switch, and
shut off the connection between battery and
frame.