Summary of Contents for Et HE28
- Page 1 HE28 OPERATION MANUAL P. de Heus en Zonen Greup B.V. Stougjesdijk 153 3271 KB Mijnsheerenland The Netherlands Tel: +31 (0) 18 66 12 333 E-mail: info@eurotrac.nl...
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Page 2: Table Of Contents
HE28 | Operation Manual Table of content 1 Basic information 2 Driving and operation 2.1 Transportation 2.2 Storage 2.3 Preparation before use 2.4 Operation of the excavator 3 Technical specifications 3.1 Vehicle performance data 3.2 Component performance data 3.2.1 Engine 3.2.2 Hydrostatic pump... -
Page 3: Diagram
HE28 | Operation Manual 4.3.3 Left‐hand working device handle 4.3.4 Right‐hand working device handle 4.4 Multi‐way valve 4.5 Walking device 4.6 Rotary mechanism 4.7 Hydraulic control system 4.8 Hydraulic power system 4.9 Working device 4.10 Electrical equipment 4.11 Description of main working interface of instrument 5 Brief description of operation 5.1 Preparation before startup... - Page 4 HE28 | Operation Manual 11.1.4 Schematic diagram of fuse relay box distribution 11.2 Hydraulics diagram Page 3 / 37 April 2023...
- Page 5 HE28 | Operation Manual EuroTrac wants to thank you for having chosen the EuroTrac HE28 excavator. The technological evolution and the new request of today's world have pushed our company to a continue improvement, focused on the product, on the quality of the materials and on the quality of work.
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Page 6: Basic Information
HE28 | Operation Manual 1 Basic information This manual contains important information for the correct and safe use of the excavator. Please always follow the instructions in this manual. You can find the following symbols in different places in this manual:... -
Page 7: Driving And Operation
HE28 | Operation Manual 2 Driving and operation Excavator drivers and managers must keep in mind "safety first", and carry out safe and standardized operations in strict accordance with the "Operation and Maintenance Manual". 2.1 Transportation When shipping the excavator in a container or car, the following must be noted: ■... - Page 8 HE28 | Operation Manual WARNING ■ Once it is found that the excavator function fails, or there are unsafe factors that need to be repaired, it should be reported to the management personnel in time, and the excavator should be stopped immediately until it returns to a safe state.
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Page 9: Technical Specifications
HE28 | Operation Manual 3 Technical specifications 3.1 Vehicle performance data Model HE28 Type Full Coverage Crawler Excavator Undercarriage width 1400 mm Minimum swing radius 1470 mm Dimensions 2400 mm x 1400 mm x 4440 mm (Transport condition with cab) -
Page 10: Hydrostatic Pump
HE28 | Operation Manual 3.2.2 Hydrostatic pump Model HLPP34‐SQC Rotating speed 2200 rpm Hydraulic power 13 kW Variable starting 10.5 Mpa Maximum pressure 22 Mpa pressure Interface description Thread Recommended torque for piping Shipping status specification installation Pressure port (B) Φ25... -
Page 11: Drive Wheel
HE28 | Operation Manual 3.2.5 Drive wheel Model YQSQ30‐01001 Number of teeth Pitch diameter φ341 Addendum diameter φ354 Matching chain pitch 101.6 Root circle diameter φ314 Meshing Meshing with teeth Pin sleeve diameter φ13 3.2.6 Idler and tensioner Model YQSQ30‐02000 Maximum outer circle of guide wheel φ315... -
Page 12: Driving Motor
HE28 | Operation Manual 3.2.11 Driving motor Model JA7K2000 Suction flow 35 L/min Work pressure 220 kgf/cm2 Motor displacement 10.4/16.4 cc/rev Motor output torque 3.64/5.74 kgf.m Two‐speed control pressure 30 kgf/cm2 Gear ratio 53.7/1 Theoretical output speed 3365/2134 rpm Gear oil quantity 0.6 L... -
Page 13: Multi-Way Valve
HE28 | Operation Manual 3.2.14 Multi‐way valve Model HLMCV10‐9‐SQC P Port 80 L/min Maximum flow A/B Port 50 L/min Nominal pressure P Port 20 Mpa P port 20 Mpa LS port 17.5 Mpa A1/B1 port 27 Mpa (Overload valve with charge valve) -
Page 14: Operating Instructions For Main Components
HE28 | Operation Manual 4 Operating instructions for main components 4.1 Body system Swing arm articulated body Seat Movable arm cylinder Cab door Movable arm Tail cover Bucket rod cylinder Walking motor Bucket rod Crawler Bucket cylinder Guide wheel Bucket... -
Page 15: Control System
HE28 | Operation Manual 4.3 Control system Walking joystick Speed operating lever Left armrest box Left‐hand working device handle Right armrest box Right‐hand working device handle Seat Yaw pedal (left pedal) Safety lock lever Quick lock pedal (right pedal) Bulldozer operating handle The operating system is mainly composed of safety locking lever, walking joystick, left hand working device handle, right hand working device handle, yaw pedal, quick change locking pedal, etc. -
Page 16: Safety Lock Lever
HE28 | Operation Manual 4.3.2 Safety lock lever Control the connection and closing of the hydraulic oil circuit of the working device, the rota ry motor and the walking motor through the solenoid valve. Its position is installed on the left side of the operating lever of the left hand working device, and there are two positions for locking and releasing. -
Page 17: Multi-Way Valve
HE28 | Operation Manual 4.4 Multi‐way valve The multi‐way valve is a load‐sensitive control main valve, which consists of five pilot reversing valves and four manual reversing valves. ■ P1 and P2 ports at the left and right ends: enter oil and are sealed with a flat surface or a combination gasket. - Page 18 HE28 | Operation Manual and rolling tread are required to be wear‐resistant and the sealing between the wheel and the shaft is better. The wheel body of this machine is made of high‐strength alloy steel, and has been strengthened by heat treatment, which has high strength and good wear resistance.
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Page 19: Rotary Mechanism
HE28 | Operation Manual 4.6 Rotary mechanism The slewing mechanism is composed of a slewing support, a slewing platform and a slewing motor. The left‐hand and right‐hand rotation of the slewing platform is controlled by the handle of the left‐hand working device. -
Page 20: Hydraulic Power System
HE28 | Operation Manual 4.8 Hydraulic power system The hydraulic power mechanism is mainly composed of an engine, a plunger pump, a gear coupling, etc. This machine adopts Kubota Euro V emission standard engine. The engine drives the plunger pump through nylon gear coupling. -
Page 21: Working Device
HE28 | Operation Manual 4.9 Working device Swing arm articulated body Stick Boom Bucket cylinder Boom cylinder Quick change mechanism Stick cylinder Bucket The working device consists of a swing arm hinged body, a boom, a stick, a quick‐change mechanism, a link mechanism, a bucket, a boom cylinder, a stick cylinder, and a bucket cylinder. -
Page 22: Description Of Main Working Interface Of Instrument
HE28 | Operation Manual Part No. Name Specification QC20‐700500‐G00 Relay DC12V QC20‐700400‐G00 Fuel level sensor 1130‐701200‐G00 Fuse holder ANS‐H 1130‐701201‐G00 Bolt fuse K30G41 864000 Battery 95D31R 0018‐800200‐001 Rocker switch JK969 0018‐800200‐001 Control box LZSU‐51 0018‐800100‐003 Safety lock limit switch Comes with control box 0018‐800100‐004... - Page 23 HE28 | Operation Manual Item Icon Function Note Preheat indicator Yellow High engine water temperature alarm High hydraulic oil temperature alarm Instrument menu key prompt symbol Water temperature gauge 10 segment fan display Fuel gauge 10 segment fan display Display working status in text mode,...
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Page 24: Brief Description Of Operation
HE28 | Operation Manual 5 Brief description of operation 5.1 Preparation before startup Check the rubber hose assembly on the mobilized machine. Where it is in contact with the machine hardware and obtuse angle and repeatedly worn during operation, wrap the worn part of the rubber hose assembly with soft rubber to avoid wearing the rubber and steel wire on the outer layer of the rubber hose;... - Page 25 HE28 | Operation Manual Right-hand work device handle Arm down Bucket dig Open bucket Arm up Walking joystick Left track forward Left track back Walking joystick Right track forward Right track back Page 24 / 37 April 2023...
- Page 26 HE28 | Operation Manual The left foot pedal controls the left and right yaw of the work device. The right foot pedal controls the quick‐ change locking cylinder (step on the right foot pedal to the right, press the switch of the quick‐change solenoid valve at the same time, and push out the quick‐change locking cylinder.
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Page 27: Safety Precautions
HE28 | Operation Manual 6 Safety precautions The handle can move at the same time during loading, and the walking mechanism must be constantly pushed. Under different mound conditions, the joint action of the boom, stick and bucket is required to improve efficiency. -
Page 28: Lubrication Of Excavator
HE28 | Operation Manual 7 Lubrication of excavator The correct lubrication work of the excavator can greatly reduce the frictional resistance of the vehicle and the wear of parts and components. In the lubrication work, clean and normal lubricants are required. -
Page 29: Daily Maintenance
HE28 | Operation Manual 8 Daily maintenance The machine should always be kept intact and clean. Especially in wet tunnels with water leakage, the fuel tank should be covered with rubber plates or canvases. Rainwater should not be allowed to leak into the fuel tank. -
Page 30: Regular Maintenance Schedule
HE28 | Operation Manual 9 Regular maintenance schedule The schedule is set based on standard working hours and operating conditions. If the excavator is in harsh conditions, please perform maintenance in advance (Black dot means "replace") 9.1 Engine Daily Monthly... -
Page 31: Hydraulic System
HE28 | Operation Manual 9.2 Hydraulic system Daily Monthly months months Yearly Item Content Tools (8 h) (200 h) (600 h) (1200 h) (2400 h) Oil quantity check Hydraulic Clean the suction filter tank Oil change Oil return Replace oil return filter... - Page 32 HE28 | Operation Manual NOTE When using oil, coolant or antifreeze that is different from the specifications of this machine, the replacement cycle cannot be the same as that specified in this book. Therefore, the replacement time is reduced by half or 1/4 compared with the time specified in this manual.
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Page 33: Common Faults And Troubleshooting Methods
HE28 | Operation Manual 10 Common faults and troubleshooting methods Item Failure phenomenon Solution Check if the main power swi tch is on No response after turning on the key switch Check if the power cord is loose Check for sufficient fuel... -
Page 34: Common Failures Of Hydraulic Motors And Repairing Methods
HE28 | Operation Manual 10.2 Common failures of hydraulic motors and repairing methods Malfunction Possible Causes Method of exclusion The motor does not The load is large, the pump supply pressure is not Adjust the pressure of the safety valve... - Page 35 HE28 | Operation Manual Malfunction Possible Causes Method of exclusion Repair or replace The working pump is faulty working pump The clearance between the valve body Repair or replace the and the spool increases due to wear spool When the spool valve is in the neutral position,...
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Page 36: Appendix
HE28 | Operation Manual 11 Appendix 11.1 Electrical diagrams 11.1.1 Diagram 1 11.1.2 Diagram 2 Page 35 / 37 April 2023... -
Page 37: Diagram
HE28 | Operation Manual 11.1.3 Diagram 3 11.1.4 Schematic diagram of fuse relay box distribution Page 36 / 37 April 2023... - Page 38 HE28 | Operation Manual 11.2 Hydraulics diagram Page 37 / 37 April 2023...
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