Related Manuals for Komatsu ecot3 PC270-8
Summary of Contents for Komatsu ecot3 PC270-8
- Page 1 SEN00420-13 HYDRAULIC PC270 EXCAVATOR PC270LC PC270- 20001 SERIAL NUMBERS and up PC270LC- 20001...
- Page 2 Find manuals at https://best-manuals.com...
- Page 3 SEN00422-13 HYDRAULIC EXCAVATOR 1SHOP MANUAL PC270-8 PC270LC-8 Machine model Serial number PC270-8 20001 and up PC270LC-8 20001 and up 00 Index and foreword Index Composition of shop manual .......................... 2 Table of contents ............................. 4 PC270, 270LC-8 Find manuals at https://best-manuals.com...
- Page 4 SEN00422-13 00 Index and foreword Composition of shop manual The contents of this shop manual are shown together with Form No. in a list. Note 1: Always keep the latest version of this manual in accordance with this list and utilize accordingly. The marks shown to the right of Form No.
- Page 5 00 Index and foreword SEN00422-13 40 Troubleshooting ......................SEN00438-06 Failure code table and fuse locations ................SEN03239-02 General information on troubleshooting................SEN00645-05 Troubleshooting by failure code (Display of code), Part 1 ..........SEN00646-05 Troubleshooting by failure code (Display of code), Part 2 ..........SEN00647-04 Troubleshooting by failure code (Display of code), Part 3 ..........
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Page 6: Table Of Contents
SEN00422-13 00 Index and foreword Table of contents 00 Index and foreword Index SEN00422-13 Composition of shop manual ....................Table of contents........................Foreword and general information SEN00423-03 Safety notice ..........................How to read the shop manual....................Explanation of terms for maintenance standard ..............Handling of electric equipment and hydraulic component ............ - Page 7 00 Index and foreword SEN00422-13 Solenoid valve ......................... 52 PPC accumulator........................54 Return oil filter ......................... 55 Attachment circuit selector valve ..................... 56 Hydraulic cylinder ........................58 Work equipment SEN00433-01 Dimensions of components ..................... Cab and its attachments SEN00434-01 Air conditioner piping ....................... Electrical system SEN00435-05 Engine control..........................
- Page 8 SEN00422-13 00 Index and foreword Testing and adjusting, Part 2 SEN00643-07 Special functions of machine monitor ..................Testing and adjusting, Part 3 SEN00644-04 Handling voltage circuit of engine controller ................Preparation work for troubleshooting of electrical system ............Procedure for testing diodes....................Pm Clinic service ........................
- Page 9 00 Index and foreword SEN00422-13 Troubleshooting by failure code (Display of code), Part 2 SEN00647-04 Failure code [CA342] Calibration Code Incompatibility ............Failure code [CA351] Injectors Drive Circuit Error..............Failure code [CA352] Sens Supply 1 Volt Low Error ............... Failure code [CA386] Sens Supply 1 Volt High Error .............. Failure code [CA428] Water in Fuel Sensor High Error............
- Page 10 SEN00422-13 00 Index and foreword Troubleshooting by failure code (Display of code), Part 4 SEN00649-04 Failure code [DXA8KA] PC-EPC (F) Sol Discon ..............Failure code [DXA8KB] PC-EPC (F) Sol Short................ Failure code [DXA9KA] PC-EPC (R) Sol Discon ..............Failure code [DXA9KB] PC-EPC (R) Sol Short ............... Failure code [DXE0KA] LS-EPC Sol Discon................
- Page 11 00 Index and foreword SEN00422-13 H-7 Speed or power of boom is low..................12 H-8 Speed or power of arm is low ................... 13 H-9 Speed or power of bucket is low ..................14 H-10 Work equipment does not move singly ................14 H-11 Hydraulic drift of work equipment is large ...............
- Page 12 SEN00422-13 00 Index and foreword Removal and installation of aftercooler assembly ..............40 Removal and installation of fuel cooler assembly ..............42 Removal and installation of engine and hydraulic pump assembly ......... 43 Power train SEN00867-03 Removal and installation of final drive assembly ..............Disassembly and assembly of final drive assembly..............
- Page 13 00 Index and foreword SEN00422-13 PC270, 270LC-8...
- Page 14 SEN00422-13 PC270-8, PC270LC-8 Hydraulic excavator Form No. SEN00422-13 © 2012 KOMATSU All Rights Reserved Printed in Japan 10-12...
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Page 15: Table Of Contents
SEN00423-03 HYDRAULIC EXCAVATOR 1SHOP MANUAL PC270-8 PC270LC-8 Machine model Serial number PC270-8 20001 and up PC270LC-8 20001 and up 00 Index and foreword Foreword and general information Safety notice ..............................2 How to read the shop manual ......................... 7 Explanation of terms for maintenance standard ..................... 9 Handling of electric equipment and hydraulic component ................11 Handling of connectors newly used for engines ................... -
Page 16: Safety Notice
Proper service and repair are extremely important for safe machine operation. The service and repair techniques recommended by Komatsu and described in this manual are both effective and safe. Some of these techniques require the use of tools specially designed by Komatsu for the specific purpose. -
Page 17: Working Range Diagram
00 Index and foreword SEN00423-03 Preparations for work When removing a cover which is under Before adding oil or making any repairs, internal pressure or under pressure from a park the machine on a hard and level spring, always leave 2 bolts in diagonal ground, and apply the parking brake and positions. -
Page 18: Table Of Contents
SEN00423-03 00 Index and foreword Precautions for sling work and making signs Only one appointed worker must make signs and co-workers must communicate with each other frequently. The appointed sign maker must make specified signs clearly at a place where he is well seen from the operator's seat and where he can see the working condition easily. - Page 19 00 Index and foreword SEN00423-03 If the load is unstable or the wire rope 13) If the hoist stops because of a power fail- or chains are twisted, lower the load ure, turn the power switch OFF. When and lift it up again. turning on a switch which was turned OFF Do not lift up the load slantingly.
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Page 20: Weight Table
SEN00423-03 00 Index and foreword a Example of O-ring (Fitted to every joint of Precautions for disconnecting and con- necting hoses and tubes in air conditioner hoses and tubes) circuit Disconnection For the environment, the air condi- tioner of this machine uses the refrigerant (air conditioner gas: R134a) which has fewer factors of the depletion of the ozone layer. -
Page 21: How To Read The Shop Manual
This section explains the method of reproducing, repairing, and replacing parts. Revision and distribution Any additions, revisions, or other change of notices will be sent to KOMATSU distributors. Get the most up-to-date information before you start any work. PC270, 270LC-8... -
Page 22: Table Of Fuel, Coolant And Lubricants
SEN00423-03 00 Index and foreword Filing method File by the brochures in the correct order of the form number printed in the shop manual composition table. Revised edition mark When a manual is revised, the ones and tens digits of the form number of each brochure is increased by 1. -
Page 23: Explanation Of Terms For Maintenance Standard
00 Index and foreword SEN00423-03 Explanation of terms for maintenance standard The maintenance standard chapter explains the criteria for replacing or reusing products and parts in the machine maintenance work. The following terms are used to explain the criteria. Standard size and tolerance To be accurate, the finishing size of parts is a little different from one to another. - Page 24 SEN00423-03 00 Index and foreword Standard clearance and standard value Clearance limit The clearance made when new parts are Parts can be used until the clearance assembled is called the “standard clear- between them is increased to a certain ance“, which is indicated by the range limit.
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Page 25: Handling Of Electric Equipment And Hydraulic Component
00 Index and foreword SEN00423-03 Handling of electric equipment and hydraulic component To maintain the performance of the machine over a long period, and to prevent failures or other troubles before they occur, correct “operation“, “maintenance and inspection“, “troubleshooting“, and “repairs” must be carried out. -
Page 26: Center Swivel Joint
SEN00423-03 00 Index and foreword Disconnections in wiring If the wiring is held and the connectors are pulled apart, or components are lifted with a crane with the wiring still connected, or a heavy object hits the wiring, the crimping of the connector may separate, or the sol- dering may be damaged, or the wiring may be broken. -
Page 27: Clss
00 Index and foreword SEN00423-03 Removing, installing, and drying connec- tors and wiring harnesses Disconnecting connectors Hold the connectors when discon- necting. When disconnecting the connectors, hold the connectors. For connectors held by a screw, loosen the screw fully, then hold the male and female connectors in each hand and pull apart. - Page 28 SEN00423-03 00 Index and foreword Connecting connectors Check the connector visually. Check that there is no oil, dirt, or water stuck to the connector pins (mating portion). Check that there is no deformation, defective contact, corrosion, or dam- age to the connector pins. Check that there is no damage or breakage to the outside of the con- nector.
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Page 29: Travel Motor
00 Index and foreword SEN00423-03 Heavy duty wire connector (DT 8-pole, 12- Disconnection Connection (Example of pole) incomplete setting of (a)) Disconnection (Left of figure) While pressing both sides of locks (a) and (b), pull out female connector (2). Connection (Right of figure) Push in female connector (2) horizon- tally until the lock clicks. - Page 30 SEN00423-03 00 Index and foreword Drying wiring harness If there is any oil or dirt on the wiring har- ness, wipe it off with a dry cloth. Avoid washing it in water or using steam. If the connector must be washed in water, do not use high-pressure water or steam directly on the wiring harness.
- Page 31 00 Index and foreword SEN00423-03 Handling controller The controller contains a microcomputer and electronic control circuits. These con- trol all of the electronic circuits on the machine, so be extremely careful when handling the controller. Do not place objects on top of the control- ler.
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Page 32: Functions And Operation By Valve
SEN00423-03 00 Index and foreword Points to remember when handling hydraulic equipment With the increase in pressure and precision of hydraulic equipment, the most common cause of failure is dirt (foreign material) in the hydraulic circuit. When adding hydraulic oil, or when disassembling or assembling hydraulic equipment, it is necessary to be particularly careful. - Page 33 00 Index and foreword SEN00423-03 Change hydraulic oil when the temperature is high When hydraulic oil or other oil is warm, it flows easily. In addition, the sludge can also be drained out easily from the circuit together with the oil, so it is best to change the oil when it is still warm.
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Page 34: Handling Of Connectors Newly Used For Engines
SEN00423-03 00 Index and foreword Handling of connectors newly used for engines a Mainly, following engines are object for follow- Pull lock type (PACKARD-2) ing connectors. 95 – 170, 12V140 engines 95E-5 Various temperature sensors 107E-1 Example) 114E-3 Intake air temperature sensor in 125E-5 intake manifold: TIM 140E-5... - Page 35 00 Index and foreword SEN00423-03 Push lock type 95, 107, 114 engines Example) Fuel pressure sensor in common rail (BOSCH-03) Disconnect connector (3) according to the fol- lowing procedure. While pressing lock (C), pull out connector (3) in the direction of the arrow. 114 engine 107, 114 engines Example)
- Page 36 SEN00423-03 00 Index and foreword 95, 125 – 170, 12V140 engines Turn-housing type (Round green connector) While pressing lock (E) of the connector, 140 engine pull out connector (5) in the direction of Example) the arrow. Intake air pressure sensor in intake mani- fold (CANNON-04): PIM etc.
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Page 37: How To Read Electric Wire Code
00 Index and foreword SEN00423-03 How to read electric wire code a The information about the wires unique to each machine model is described in Troubleshooting section, Relational information of troubleshooting. In the electric circuit diagram, the material, thickness, and color of each electric wire are indicated by sym- bols. - Page 38 SEN00423-03 00 Index and foreword Dimensions (Table 2) Nominal No. 0.5f (0.5) 0.75f (0.85) 1.25f (1.25) Number of strands/Diam- 20/0.18 7/0.32 30/0.18 11/0.32 50/0.18 16/0.32 37/0.26 26/0.32 58/0.26 41/0.32 65/0.32 eter of strand Conductor Sectional 0.51 0.56 0.76 0.88 1.27 1.29 1.96 2.09...
- Page 39 00 Index and foreword SEN00423-03 Color codes table (Table 3) Color Code Color of wire Color Code Color of wire Black Light green & White Brown Light green & Yellow Brown & Black Blue & Red Brown & Red Blue & White Brown &...
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Page 40: Precautions When Carrying Out Operation
SEN00423-03 00 Index and foreword Precautions when carrying out operation [When carrying out removal or installation (disassembly or assembly) of units, be sure to follow the general precautions given below when carrying out the operation.] Precautions when carrying out removal work If the coolant contains antifreeze, dispose of it correctly. - Page 41 00 Index and foreword SEN00423-03 Precautions when carrying out installation work Tighten all bolts and nuts (sleeve nuts) to the specified (KES) torque. Install the hoses without twisting or interference and fix them with intermediate clamps, if there are any. Replace all gaskets, O-rings, cotter pins, and lock plates with new parts.
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Page 42: Pilot Oil Filter
SEN00423-03 00 Index and foreword Checking muffler and exhaust pipe for damage and looseness Visually check the muffler, exhaust pipe and their mounting parts for a crack and damage. If any part is damaged, replace it. Check the mounting bolts and nuts of the muffler, exhaust pipe and their mounting parts for looseness. -
Page 43: Method Of Disassembling And Connecting Push-Pull Type Coupler
00 Index and foreword SEN00423-03 Method of disassembling and connecting push-pull type coupler Before carrying out the following work, loosen the oil filler cap of the hydraulic tank gradually to release the residual pressure from the hydraulic tank. Even if the residual pressure is released from the hydraulic tank, some hydraulic oil flows out when the hose is disconnected. - Page 44 SEN00423-03 00 Index and foreword Type 2 Disconnection Hold the tightening portion and push body (7) straight until sliding prevention ring (6) contacts contact surface (a) of the hexag- onal portion at the male end. (Fig. 6) While holding the condition of Step 1), turn lever (8) to the right (clockwise).
- Page 45 00 Index and foreword SEN00423-03 Type 3 Disconnection Hold the tightening portion and push body (9) straight until sliding prevention ring (8) contacts contact surface (b) of the hexag- onal portion at the male end. (Fig. 10) While holding the condition of Step 1), push cover (10) straight until it contacts contact surface (b) of the hexagonal por- tion at the male end.
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Page 46: Standard Tightening Torque Table
SEN00423-03 00 Index and foreword Standard tightening torque table Table of tightening torques for bolts and nuts a Unless there are special instructions, tighten metric nuts and bolts to the torque below. a The following table applies to the bolts in Fig. A. Thread diameter of bolt Width across flats Tightening torque... - Page 47 00 Index and foreword SEN00423-03 Table of tightening torques for split flange bolts a Unless there are special instructions, tighten split flange bolts to the torque below. Thread diameter of bolt Width across flats Tightening torque 59 – 74 6.0 – 7.5 98 –...
- Page 48 SEN00423-03 00 Index and foreword Table of tightening torques for hoses (taper seal type and face seal type) a Unless there are special instructions, tighten the hoses (taper seal type and face seal type) to the torque below. a Apply the following torque when the threads are coated (wet) with engine oil. Tightening torque Nm {kgm} Taper seal Face seal...
- Page 49 00 Index and foreword SEN00423-03 Table of tightening torques for 102, 107 and 114 engine series (Eye joints) a Unless there are special instructions, tighten the metric eye joints of the 102, 107 and 114 engine series to the torque below. Thread size Tightening torque 8 ±...
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Page 50: Conversion Table
SEN00423-03 00 Index and foreword Conversion table Method of using the conversion table The conversion table in this section is provided to enable simple conversion of figures. For details of the method of using the conversion table, see the example given below. Example: Method of using the conversion table to convert from millimeters to inches Convert 55 mm into inches. - Page 51 This as a preview PDF file from best-manuals.com Download full PDF manual at best-manuals.com...