GC78-8 Hydraulic Crawler Excavator

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Product Description:

GC78-8 Hydraulic Crawler Excavator, equipped with YANMAR 4TNV94L Engine, with Boom 3.71m, Arm 1.65m, Bucket 0.28m3, and Blade 2150mm×342.3mm.

GC78-8 Hydraulic Crawler Excavator

Technical Specifications

        Engine

    Travel System

Model

YANMAR 4TNV94L

Travel motors

JEIL, Korea; Variable axial piston motor

Type

Four-cylinder in line,

natural intake

Support roller quantities

2×5

Carrier roller quantities

2×1

No. of cylinder

4

Travel shoes

2×38

Bore and stroke

98mm×110mm

Travel speed

2.8/4.8km/h

Displacement

3.319L

Drawbar pulling force

57kN

Power output

43.4kW/2200rpm

Grade ability

70% (30°)

Ground clearance

384mm

      Hydraulic System

      Cab Control

Pump

NACHI, Japan

Cab

All-weather, sound-suppressed Cab and equipped with a heavy, insulated Floor Mat; Front Window can be opened and slid; 6-direction adjustable Seat; LED display, Automatic monitoring, display and warning; cool & hot Air Conditioner

Type

variable double–piston pump

Max. discharge flow

169.5L/min

Max. discharge pressure

Boom, arm and bucket

28MPa

Control

Two hand levers and two foot pedals for travel Two hand levers for excavating and swing;

Electric rotary-type engine throttle

Travel circuit

28MPa

Swing circuit

23.5MPa

Control circuit

3.5MPa

Boom, Arm Bucket

Pilot control pump

Gear type

Boom cylinder

115mm×65mm×840mm

Main control valve

Negative flow control

Arm cylinder

100mm×60mm×855mm

Oil cooler

Air cooled type

Bucket cylinder

90mm×55mm×710mm

      Swing System

Refilling Capacitieslubrications

Swing motor

JEIL, Korea;

Fuel tank

130L

Swing motor type

Axial-piston motor

Cooling system

8L

Brake

Hydraulic oil released

Engine oil

12L

Parking brake

Hydraulic disc brake

Hydraulic oil tank

95L  Tank oil level

Swing speed

11.3r/min

114L  Hydraulic system

                          Bucket


Type

Backhoe bucket


    Bucket capacity

0.28m3 (SAE)


Bucket width

750mm


Arm Type


A

Max. digging depth

7222mm


B

Max. dumping height

5145mm


C

Max. digging height

3963mm


D

Max. vertical digging depth

3715mm


E

Max. Depth cut for 2440m(8')Level Bottom

3874mm


F

Max. digging distance

6324mm


G

Max. digging radius at ground level

6171.8mm


H

Min. swing radius of work equipment

1818.5mm


Digging Force (ISO6015)        Unit: kN


Arm length

1650mm


Bucket digging force

56kN


Arm digging force

41.5kN


Arm Type                                 1650mm


A

Overall length

6320mm

I

Tread

2130mm


B

Ground contact length (Transportation)

4330mm

J

Track length

2749.5mm


C

Overall height(to top of boom)

2829mm

K

Track gauge

1700mm


D

Overall width

2150mm

L

Track width

2150mm


E

Overall height(to top of cab)

2652mm

M

Shoe width

450mm


F

Counter weight ground clearance

812mm

O

Bonnet height

1775mm


G

Ground clearance

384mm

P

Revolving frame width

2203mm


H

Tail swing radius

1822mm

Q

Distance from swivel center to tail

1750mm



             Operating Weight and Ground Pressure


Operating weight includes basic machine (with boom 3.71m, arm 1.65m bucket 0.28m3, and blade 2150mm×342.3mm)


Shoe width

450mm


Overall width

2150mm


Ground pressure

32KPa


Operating weight

7000kg





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Q:What kind of documents do you need for driving an excavator?
It is issued by the Chinese machinery department. It is common in the whole country and has the skills to be reported in our school
Q:How much are the first pilot pressure and the two pilot pressure of the excavator?!
The two pilot pressure is usually 10% of the pilot pressure, and the two pilot pressure is controlled by the handle button. A pilot pressure is required with the normal operation of the system is generally about 35kg, two pilot pressure used in special conditions, such as the bucket bucket must use to dig out from the stone soil and the mining stress exceeds the system overflow pressure 345KG system set in a mining buried in the earth stone, then open the two pilot system, the sum of the overflow pressure at that time as one and two times the pilot pressure is 380kg, the working pressure increased to complete this action.
Q:Excavator card good test?
Mine is for you, 11OO yuan. It's a little expensive.
Q:Introduction of excavator
The hydraulic excavator of the early trial production is the hydraulic technology adopting the airplane and the machine tool. It lacks the hydraulic component suitable for all kinds of working conditions of the excavator, the quality of manufacture is not stable enough, and the supporting parts are not complete. Since 1960s, hydraulic excavators have entered the stage of popularization and vigorous development, and the production and production of excavators and excavators in various countries have been increasing rapidly, and production has soared. In the past 1968-1970 years, hydraulic excavators have accounted for 83% of the total output of excavators, and are now close to 100%. Three 、 the structure of excavator, the common excavator structure includes power device, working device, slewing mechanism, control mechanism, transmission mechanism, walking mechanism and auxiliary facilities, etc.. In appearance, the excavator consists of three parts: the working device, the upper rotating platform and the walking mechanism.
Q:How about Carter excavator model?
will be different. In 320D, for example, there are 2.5 and 2.9, two commonly used bucket (small arm) can be selected, bucket in the country with 1 and 1.2 more, and at the same time with heavy bucket, rock bucket, heavy rock bucket is more common. Special conditions can be selected to widen track, guard board, cab protection device, low temperature starting device and so on. Basically, most of the working conditions can be well matched.
Q:31 excavator factory coding rule is how, it is best to illustrate, thank you!
31 meaning of excavator number (used in 04-06):Example LSY822C19060320L: China06: year of productionSY: 310320: the production of serial number8: crawler type22: whole weightC1: Model9: check code31 meaning of excavator number (used in 06 years):06SY22210318:06: year of productionSY: 3122: whole weightType 21:C50318: the production of serial number
Q:The working principle of excavator air conditioner
All I know is that the compression pump compresses the air in the engine and becomes a cooling air
Q:How does the excavator cross the ground cable?
This is not how you simple excavator must first condition excavator track with wire stand in a line up on the side of the excavator digging machine wire; track Caution!
Q:Which kind of excavator is good?
Disadvantages: high prices, accessories expensive. (Note: because of the domestic market share is very high, deputy plant parts, so it is cheaper): Japanese brands, Hitachi excavator sales is also very big, general can also assemble. (HITACH) has the advantages of mechanical matching, hydraulic system, flexible action, general value, durability, cost, fuel consumption, power, price 3-5 million cheaper than Komatsu. Disadvantages: not durable, more, after two or three years of serious oil spill, mainly high water temperature or hydraulic system, the No. 20 machine for four missing engine, it is to increase the displacement of the lack of strength reduction, not dare to use, the general price of second-hand car.
Q:Which country is Carter excavator?
In fact, Carter is also produced in Japan on the nameplate, there are MADE, IN, JAPAN

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