Yuchai YC25-8 User manual

Hydraulic Digger
USER MANUAL

Not correct operation could cause the damage. Before the
machine can be used, it should be done as follow:
● Remember the operation manual and the use criterion
● Read &understand the content of the user manual about the
safety operation
● Understand & know the safety sign of the machine
● Let the person leave the workplace who not the operator
● It should have a safety operation training before you operates
the machine
You have the duty to observance the ordinance & laws, follow the
relevant direction about machine operation & maintain from
YUCHAI.

Hydraulic Digger
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Contents
Ⅰ、Prolegomena
To user------------------------------------------------------------------------1-2
Product Information -------------------------------------------------------------1-3
Direction of The Machine ------------------------------------------------------1-5
Machine Form---------------------------------------------------------------------1-6
Technical Parameters ----------------------------------------------------------1-7
Ⅱ、Safety Rule
General rules----------------------------------------------------------------------2-2
Safety Prompt --------------------------------------------------------------------2-3
Safety Equipment ---------------------------------------------------------------2-4
Safety Sign ------------------------------------------------------------------------2-5
Safety of The Workplace -----------------------------------------------------2-13
Safety Operation ---------------------------------------------------------------2-14
Transport &Load and Unload -----------------------------------------------2-24
Maintain --------------------------------------------------------------------------2-25
Fire-proof、Explosion-proof& Antigas -------------------------------------2-26
Accumulator ---------------------------------------------------------------------2-27
Hydraulic System --------------------------------------------------------------2-28
Ⅲ、Parts Introduction
Pandect for Operation Device(Cab Type) ---------------------------------3-2
Pandect for Operation Device(Canopy Type) ----------------------------3-3
Panel Switch of Left Controlling Box(Switch group)---------------------3-4
Panel Switch of Right Controlling Box(Panel meter and Switch)-----3-5
Safety Lock Part ----------------------------------------------------------------3-7
Operate The Operation Device& Rotating Device ---------------------3-8
Driving Operation --------------------------------------------------------------3-10

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throttle grip ----------------------------------------------------------------------3-11
driver's chair --------------------------------------------------------------------3-12
safety belt -----------------------------------------------------------------------3-13
Air-condition Control ----------------------------------------------------------3-14
Radio ------------------------------------------------------------------------------3-18
Door and Window --------------------------------------------------------------3-20
Ⅳ、Operation Manual
Prepare for Running Machine ------------------------------------------------4-2
Engine Operation ----------------------------------------------------------------4-3
In&Out Machine ------------------------------------------------------------------4-7
Moving The Machine -----------------------------------------------------------4-8
Turning The machine ---------------------------------------------------------4-10
Rotating The Machine --------------------------------------------------------4-11
Operate The Operating Device ---------------------------------------------4-12
Working On The Slope or In The Water ----------------------------------4-14
Out of The Muddy Condition ------------------------------------------------4-15
Operating Manual --------------------------------------------------------------4-16
Take-down & Installing The Bucket ----------------------------------------4-19
Place The Machine ------------------------------------------------------------4-20
After The Operation -----------------------------------------------------------4-22
Takedown &Transport The Machine --------------------------------------4-23
Operate The Machine Under The Cold/Hot Weather -----------------4-28
Deposit The Machine ---------------------------------------------------------4-29
Reason for the Technical Trouble& Resolve ----------------------------4-31
Ⅴ、Maintenance
General Knowledge of Maintenance ----------------------------------------5-2
Maintenance Summary --------------------------------------------------------5-4
Easy Broken Part ----------------------------------------------------------------5-6

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Forced Changing Part ----------------------------------------------------------5-7
Choose List of the Oil Plants--------------------------------------------------5-8
The Tighten Moment ------------------------------------------------------------5-9
Maintenance List of Time-check -------------------------------------------5-12
Routine Check ------------------------------------------------------------------5-14
Fuel System of the Engine ---------------------------------------------------5-15
Cooling System of the Engine ----------------------------------------------5-19
Lubricating System of the Engine ------------------------------------------5-22
Air Intake System of The Engine -------------------------------------------5-24
Other Maintenances of The Engine ---------------------------------------5-26
Hydraulic System --------------------------------------------------------------5-27
Accumulator ---------------------------------------------------------------------5-33
The Reducer --------------------------------------------------------------------5-35
Pedrail-----------------------------------------------------------------------------5-37
Support Roller,Carrier Roller& Leading Roller -------------------------5-38
Lubricating -----------------------------------------------------------------------5-39
Air-condition(If the machine have) -----------------------------------------5-40
Replace The Gear of The Bucket ------------------------------------------5-43
Washing The Plastic Cushion of the floor --------------------------------5-44
Fuse -------------------------------------------------------------------------------5-45
Ⅵ、Attachment Manual
Safety Item-------------------------------------------------------------------------6-2
Installing & take-down step of the attachment ----------------------------6-3
Operation Manual of the attachment ----------------------------------------6-4
Daily Check of Hydraulic Crush Hammer ----------------------------------6-9
Attachment:
Black Manual of TheCertification

Guangxi Yuchai Heavy Industry Company Limited

Hydraulic Digger
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1
Prolegomena

Hydraulic Digger
1-2
Product Information
When you want to know the informations of the machine, please
view the picture as follow:
● Overall Information(The nameplate is on the nearside of the
platform)
● Engine Information(The nameplate is in the top of the cylinder
cover)

Hydraulic Digger
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●Running Information(The timer of the engine is in the digital
combination instrument which in the cab)
Machine File
Please fill the machine and engine’s series No. in the table.When
you need to buy the spare parts or the relational informations,you
can tell us the No..
Direction of The Machine

Hydraulic Digger
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Front、back、left、right、top、underside in the manual same as
the direction as follow: