Yuchai YC25-8 digger Owner's 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

Contents
Prolegomena
To user------------------------------------------------------------------------	1-2
Product Information -------------------------------------------------------------	1-3
Direction of The Machine ------------------------------------------------------	1-5
Machine Form---------------------------------------------------------------------	1-6
Technical Parameters ----------------------------------------------------------	1-7
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
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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Hydraulic Digger

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

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

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

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 The Certification

3

Guangxi Yuchai Heavy Industry Company Limited

Hydraulic Digger

1

Prolegomena

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Hydraulic Digger

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)

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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

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

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Hydraulic Digger

Machine Form (The Moving–arm Un-deflecting Type)

1.	Bulldozer	2.Bucket	3. Bucket oil cylinder
4.	Lever	5.Lever oil cylinder	6.Moving-arm
7.	Moving-arm oil cylinder		8. Rotating platform
9.	Rotating platform oil cylinder		10.Driving wheel
11.Pedrail		12. guide deflection sheave
13.Bulldozer oil cylinder

Note:The lookum is optional equipment.It only used in the better condition.

Technical Parameters

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1.Frame dimension parameter

Code	Item	Unit		YC25-8
				825E
	Operating Weight	Kg		3080
	Standard bucket capacity	M3		0.07
	Name of engine		Kubota D1803		Cummins A1700
	Power of engine	Kw/rpm	22.8/2200		24/2200
A	Length	Mm		4508
B	Height	Mm		2400
C	Overall width	Mm		1450
D	Width of pedrail	Mm	300(steel/rubber)
E	Rotating radii of platform	Mm		1351
F	Length of pedrail	Mm		1935
G	Distance of roller	Mm		1455
H	Height from floor	Mm		320
I	Height of Boom end	Mm		1409
J	Width of the platform	Mm		1420
K	Height of engine cover	Mm		1384
L	Height from floor of platform	Mm		563
	Width of bucket	Mm		517
	Driving speed(low/hight)	Km/h		2.4/4.2
	Rotating speed of platform	Rpm		10~12
	Cab			●
	Canopy			●
	Deflection angle(left/right)	°		80/50

Note:Technical paremetes are subject to replace without prior notice!

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Hydraulic Digger

2.Operating parameters

	Code	Item	Unit	YC25-8
				825E
	A	Max. digging height	Mm	4205
	B	Max.height of load&unload	Mm	2840
	C	Max. digging depth	Mm	2610
	D	Max. digging radii	Mm	4610
	D1	Max.digging distance of level floor	Mm	4487
	E	Digging radii of Max.digging height	Mm	2957
	F	Min. rotating radii	Mm	1856
	G	Max. bucket depth of Bulldozer	Mm	372
	H	Max. uplift height of Bulldozer	Mm	262
		Max.dig power	KN	17.4

Note:Technical paremetes are subject to replace without prior notice!

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3. Bucket series (black area is standard collocate)

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4.Driving machine

It adopts the hydraulic motor thought the multilevel epicycle reducer to become independent drive.The reducer inside of the padrail.

	Driving speed(km/h)	Max.pull(kN)	Power of make the grade
High speed	4.3	12.36	58%(300)
Low speed	2.4	22.94

5.Hydraulic system

First enter to the throttle hydraulic system Main valve:Intake multiple valve

Variable plunger pump:Flux of 2 plunger pump(L/min) 52.8 Pressure(Mpa) 21

Flux of 1 gear pump(L/min)	15.4
Pressure(Mpa)	21
Flux of lead gear pump(L/min)	7.7
Pressure(Mpa)	3.9

Return oil filter:paper material with 10micron

Oil absorbent filter: gridding filter

7.Electric system Voltage: 12V Accumulator:60 x 2AH

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2

Safety Rules

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Hydraulic Digger

Safety Prompt

1. Warning sign

In the user manual, the sign shows the import information about the safety. When you see the sing, you need to read the information behind the sign careful

2. Safety prompting word

The machine includes ”Danger” ”Warning” ”Notice” etc. The safety prompting word. Explain them as follow:

●Danger: If not elude, the result may be lead die or hurt. It only use in the condition which have the most dangerous.

●Warning: If not elude, the potential danger may be lead die or hurt.

●Notice: If not elude, the potential danger may be lead hurt. Or it can prompt the operation which can hurt the body.

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Hydraulic Digger

Safety Equipment

1.The safeguard for the operator

1)The operator need put on the interrelated safeguard: sheathy work clothes motorcycle safety helmet work shoe and so on(safety glass safety earplug glove safe belt)

2)IF the operator has long hair, please tie it and wear the motorcycle safety helmet. It can protect your hair not into the machine.

3)The user need put some first-aid medicines in the machine, and routine check them.

4)Before operating or examining, please check the function of the safeguards are ok.

2.Flee hammer & fire extinguisher

Flee hammer & fire extinguisher installing on the wall of the cab. When you couldn’t out or into the cab, need escape the cab, you can use the flee hammer break the glass. But when you break the glass, please protect you eye and face.

When the machine burning, please use the fire extinguisher. Please read the user manual of the fire extinguisher carefully. Routine check and maintenance the fire extinguisher.

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Safety Sign

Warning: if you don’t know the safety sign or the safety sign loses, it may be make some casualty. Please replace the lose or broken sign timely, and make the safety sign cleanness and easy to see.

Please read the user manual and the safety sign carefully before operation maintenance maintain the machine.

Check the sign before running the machine every day. If they not see clear, please clean them.

When cleaning the sign, it only use the calico water soap. Don’t use the organic solvent gas, etc. They many are make the sign lose.

1.Sort of safety sign

In the user manual, the safety sign adopts “Glossary safety sign” and ”Graphic safety sign”.

A. Graphic safety sign

It use the picture to show the

Safety warning information.

Simple and easy to understand.

B. Glossary safety sign

It used the picture and word to

show the safety warning

information. It use for the way

which the picture couldn’t show

the infofrmtion,and need the

word to explain.

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Hydraulic Digger

2. The place of the safety sign

The sign is the picture only show the “Safety sign” part of the sign,

other will show in next section

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3. Graphic& instruction of the safety sign

1) Care and remoteness the operating device

2 Tail Trade Mark

3) Hoisting Mark

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4 No treading

5) Pay attention to the safety when up & down the machine

Up& down the machine, please slow, and fist the handrail, face to the machine, use the ladder and the pedrail.

5) Reading the manual

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7) Binding Mark

8)Hoisting and Binding mark

9)Locked mark

Left control box locked

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10) Long arm warming mark

11 Left locked mark

12) Warning marks

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13) When maintain electric please read the manual

Electric system can easy to shock hazard. It should read the manual when it maintain.

14) Warning mark on Left control box

15) Do not start the engine through short circuit of the starting motor

16) Excavator electric shock mark

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17) System warning mark

18)Hydraulic oil filling mark

19)Sign of transfuse the fuel oil

20)Sign of Lubrication

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21) Sign of sling

22)Accelerograph mark

23)Pay attention to lock it after open the window of the cab.

If it doesn’t lock the window,it will close because of the outside force or the libration,may be hurt the body.

24)Sign of noise

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25)CE mark

26)Safety sign

27)The sign of center of rotating

28) Dozer blade and Chassis adjusting sign

30) Don’t allow to split drill cut and hit the accumulator the high-pressure of the air spring,and need keep way from the fire or the high temperature.

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Hydraulic Digger

The parts have the high-pressure air.The wrong way to dispose it can lead some hurts.Please let the person who has more experiences to dispose it.

30) Binding sign

31)Sign of Door latch

32)Use notice of the flee hammer

2-15