One of the best places to get up close and personal with large hydraulic machines is at a construction site. Hydraulic breaker owner s manual rock breakers inc. Mechanism swivel joint excavator specifications working principle typical hyd. Hydraulic pumpmotor division hydraulic flow is developed as the pump rotating group is driven by a prime mover hydraulic pump basics fluid is forced out of pump at the pump outlet a partial vacuum is created at the pump inlet and atmospheric pressure forces fluid into pump from the reservoir. The hydraulic ram is used in a hydraulic circuit for accomplishing a particular work. These advanced technologies are at work to yield bigger output with higher fuel efficiency. Hydraulic oil cooler steel hydraulic tank with fluid level sight gauge primary auxiliary circuit plumbed to arm with 1way and 2way operation t 12 ft 8. Us20110061755a1 hydraulic circuit system for hydraulic. Its designed to take on the hard work you put in front of it every day. The machine uses a modified opencenter load sensing system olss.
All exhaust gases can kill or cause illness so use the excavator with adequate ventilation. Match the excavator to the job using power modes including new smart mode that automatically matches engine and hydraulic power to your digging conditions. An asterisk mark indicates load limited by hydraulic capacity. The thing that is most amazing about these machines is their sheer size. Knowhow hydraulic excavator by rln free download as powerpoint. A third step is the comparison of energy use characteristics of the same machine doing the cycle without actually. Pdf being really versatile machinery, hydraulic excavators are widely used in earthmoving applications. Doosan dx140lc3 hydraulic excavator schemes set of pdf.
The authors studied autonomous control technology for excavation and loading work using hydraulic excavators. Control circuits are available as attachments, allowing for operation of high and medium pressure tools such as shears, grapples, hammers, pulverizers, multiprocessors and vibratory plate compactors. The bobcat excavator has an internal combustion engine with resultant heat and exhaust. Professional mode for heavy duty application h mode. The r9800s high pressure hydraulic oil filtration systems remove contaminants from the fluid to offer the highest rate of hydraulic system efficiency.
You may also be interested in the following pdf manual for hitachi hydraulic excavator zx55u5b. Load point is the center line of the bucket pivot mounting pin on the arm. To keep the hitachi hydraulic excavator zx55u5b in working condition and to ensure its productive work, you should purchase this pdf workshop manual. The excavator should be inspected by the operator prior to being used. When working on sensitive waterways, replacing conventional hydraulic oil with a vegetable oil product that is nontoxic to the environment and biodegradable is.
The ample engine power enables an increase in work ef. Kobelco k904e, k905a hydraulic excavator service manual. The system is essentially hydraulic and electronically controlled. The operator can select virtually any seat position to suit himself so that all instruments and controls are within easy reach. Because of the hydraulic action of their stick and bucket cylinders, they. This set contains technical specs, hydraulic and electrical diagrams for doosan excavator dx140lc3r. This pdf workshop manual is intended for the current repair and routine maintenance of the hitachi hydraulic excavator zx 68usr5a model. Motion analysis of hydraulic excavator in excavating and loading. After a major component failure, the hydraulic system must be flushed. Komatsu has almost 200 patents relating to the dash 6.
Their versatiity makes these machines widely used pieces of mobile equipment. Capacities marked with an asterisk are limited by hydraulic capacities. Finding a suitable and best excavator from used hydraulic excavators for sale is not an easy task as it needs experts opinion and specifications knowledge base to understand the working condition and price estimation to pay for it. Product brochure for 330 hydraulic excavator aexq246101. Used hydraulic excavators hydraulic excavators for sale. Komatsu hydraulic excavators are world class excavators built with the highest quality materials and superior craftsmanship. On an excavator, for example, not only are all working movements such as. The db stick uses a dfamily bucket and was designed for high volume. The advanced hydraulic system provides the optimum balance of power and efficiency while giving you the control you need for your precise digging requirements. Product description this is the shop manual for kobelco hydraulic excavator model k904e, k904el wich contained is the necessary technical data concerning the maintenance and repair of this model.
Excessive large particle contamination can cause severe damage to the piston and piston cavity. The hydraulic oil filter replacement has been extended from 500 hours to hours. The first hydraulic excavator was created in 1960s, in germany, than it was introduced to japan and other places, being widely applied across the world. The dealer explains the capabilities and restrictions of the bobcat excavator and attachment for each application. Modal analysis on working equipment of hydraulic excavator. Hydraulic excavator ecogauge high power komatsu engine.
How mini excavator hydraulic systems work compact equipment. Preventing injuries when working with hydraulic excavators and backhoe loaders cdc pdf pdf 622 kb page. The goals of the research were to apply it, rt etc. Specalog for 329d l hydraulic excavator, aehq598801. Compact excavators would be less awesome without the gallons of fluid coursing through their hydraulic veins. Backhoes were designed basically for ditching and cleanup. A hydraulic circuit system for a hydraulic excavator, which has a hydraulic circuit for an attachment, includes. William smith otis in the united states in 1837, which was powered by the steam at that time. The pc6008 excavator is equipped with two working modes.
Absent the hydraulics, modern excavators would still clank and grind, using cables, chains and gears to accomplish their work, instead of hum as they pirouette and activate boomend tools. If the tool is touching a rock, this energyforce compressive stress wave. Versatile excavator with adjustable width for efficient use. Small specalog for cat 304e cr mini hydraulic excavator. Specalog for 325d l hydraulic excavator, aehq566504. The high quality finish of the cab interior including effective noise insulation reduces operator fatigue. Preventing injuries when working with hydraulic excavators. Excellent control, high stick and bucket forces, impressive lift capacity, simplified service and a comfortable operator station to increase your productivity. The hydraulic cylinders in the excavator arms are limited to linear actuation. In order for the obvious to be obvious, the fundamental laws of hydraulics must be kept in mind.
Specalog for 345d345d l hydraulic excavator, aehq5941. Site to use more pv200 type hydraulic excavator as an example. Modal analysis on working equipment of hydraulic excavator the open mechanical engineering journal, 2015, volume 9 175 material properties 3of q345 are. Based on the finite element analysis software ansys, the 3d models of the main components boom and bucket rod of the working equipment for certain type of hydraulic excavator were analyzed. Oct 03, 2012 this video explains about the working of a hydraulic ram or hydraulic cylinder.
Tippers, excavators, elevating platforms lifting and conveying devices agricultural machinery there is a wide variety of applications for hydraulics in the construction machinery industry. Sep 15, 2014 when working on sensitive waterways, replacing conventional hydraulic oil with a vegetable oil product that is nontoxic to the environment and biodegradable is sometimes mandatory but often a. Hydraulic excavator hitachi construction machinery. Before use, read and understand the operators manual for proper operation. For applications that require additional track protection or alignment, optional guarding is available. Compact s shape round, compact shape for excellent fill values and easy discharge of material. The operator should be fully acquainted with the operation manual before operating. Mounted on rubber isolator, the cab design reduces vibrations and limit noise pollution to provide a quiet environment. Hitachi hydraulic excavator zx55u5b workshop manual pdf. Service and maintenance fast, easy service has been designed. Kobelco k904e, k905a hydraulic excavator, pdf service manual, kobelco, k904e, k905a hydraulic excavator, pdf, service manual. Komatsu excavators withstand some of the toughest working conditions due to unique casting designs and world class manufacturing processes.
In any troubleshooting situation, no matter how simple or complex the hydraulic system, always start with the basics. The mechanical engineering journal open access modal. The new generation hydraulic excavators the hitachi zaxis3 series newgeneration hydraulic excavators are packed with a host of technological features clean engine, hitachi advanced hydraulic technologies, with strong undercarriage and front attachment, plus well matching of power and speed. Preventing injuries when working with hydraulic excavators and backhoe loaders. Lifting capacities shown do not exceed 87% of machine hydraulic capacity or 75% of minimum tipping load. Lifting capacities are based on machine standing on firm, uniform supporting surface. The mechanical engineering journal open access modal analysis. Hydraulic power loss reduced with advanced hydraulic system. The first swing mechanical excavator was invented in 1895, a milestone in the excavators history. Hydraulic excavators 81 chapter 8 hydraulic excavators hydraulic excavators are designed to excavate below the ground surface on which the machine rests. Hence, their mode of operation is fundamentally different from cable. Heavy lift mode turning the heavy lift mode switch on activates the allout power delivery system to increase the lifting force of the boom. Never has there been an excavator so easy to operate, so natural, so. Komatsu excavators hydraulic excavators komatsu america corp.
Large sound absorbing blades attached on the air intake and exhaust outlet block noise transmission. A standard test procedure requires four main working conditions to evaluate machine performance. Fingertip control for the boom swing and auxiliary hydraulic functions makes operation easier while providing more room on the floor for the. This video explains about the working of a hydraulic ram or hydraulic cylinder.
For example, here is a mediumsize shovel excavator. Case cx240b excavator hydraulic schematic pdf manufactured by the company case presented for you in electronic format page size 3118. The inherent frequency and the main vibration mode were analyzed by extracting the first 6th order modal. The system is used to control the swash plate type variable piston pump swash plate angle output flow method of reducing the power output of the engine, thereby reducing fuel consumption, it is an energysaving. The following list of items should be included in the preshift check. Specalog for 330d l hydraulic excavator, aehq566702. Kinematic and dynamic simulation analysis of hydraulic. User must make allowances for job conditions such as soft or uneven ground. The cat 304e cr mini hydraulic excavator delivers high performance in a compact design to help you work in the tightest applications.
Service and maintenance fast, easy service has been designed in with extended service intervals, advanced filtration, convenient filter access and userfriendly electronic. These machines have good mobility and are excellent for generalpurpose work, such as excavating trenches and pits. In this complect, we provide information to maintenance and operated hydraulic excavator doosan dx140lc3r. Hitachi hydraulic excavator zx68usr5a workshop manual pdf. Combined with the three dimensions hybrid cooling fan, the machine realizes environmentallyfriendly operation with amazingly low noise. Horns, lights, guards and shields, fire extinguish, glass and wipers. This manual can be viewed on any computer, as well as zoomed and printed, makes it easy to diagnose and repair problems with your machines electrical system. The controlled movement of parts or a controlled application of force is a common requirement in the industries.
Fingertip control for the boom swing and auxiliary hydraulic functions makes operation easier while providing more room on the floor for the operators feet. Being really versatile machinery, hydraulic excavators are widely used in earthmoving applications. The db stick uses a dfamily bucket and was designed for. Engine and hydraulic fluid levels boom, stick, and bucket hydraulic leak. Developed with lehnhoff, the new auto tilt bucket incorporates stroke sensing cylinder technology to provide real time tilt positioning in semiauto working.
The conclusion providing design theory and improvement for the excavators working device, which also play an. Hydraulic systems introduction and working principle. The load point is the centreline of the bucket pivot mounting pin on the arm. Backhoes are used at surface metal and nonmetal mines for various types of applications. Fingertip control for the boom swing and auxiliary hydraulic functions makes operation easier. Knowhow hydraulic excavator by rln loader equipment. Shortened working life and reduced efficiency of hydraulic oil overheats, ages, electrochemical changes. Basic technology toward autonomous hydraulic excavator.912 1393 1027 1349 1064 267 135 53 1132 1114 1518 196 1388 696 680 277 457 488 257 1380 1052 1242 262 260 970 167 1124 1164 37 1254 1122 1269 29 1259 406 247 928