KOMATSU PC450- 6 PC450LC-6 HYDRAULIC EXCAVATOR SERVICE REPAIR MANUAL (UEBM000100)
VIDEO PREVIEW:
IMAGE PREVIEW:
DESCRIPTION:
KOMATSU PC450- 6 PC450LC-6 HYDRAULIC EXCAVATOR SERVICE REPAIR MANUAL (UEBM000100)
- This shop manual has been prepared as an aid to improve the quality of repairs by giving the servicemen an accurate understanding of the product and by showing him the correct way to perform repairs and make judgements. Make sure you understand the contents of this manual and use it to full effect at every opportunity.
- This shop manual mainly contains the necessary technical information for operations performed in a service workshop. For ease of understanding, the manual is divided into the following chapters; these chapters are further divided into the each main group of components.
- STRUCTURE AND FUNCTION
This section explains the structure and function of each component. It serves not only to give an understanding of the structure, but also serves as reference material for troubleshooting. - TESTING AND ADJUSTING
This section explains checks to be made before and after performing repairs, as well as adjustments to be made at completion of the checks and repairs. Troubleshooting charts correlating ”Problems“ to ”Causes” are also included in this section. - DISASSEMBLY AND ASSEMBLY
This section explains the order to be followed when removing, installing, disassembling or assembling each component, as well as precautions to be taken for these operations. - MAINTENANCE STANDARD
This section gives the judgement standards when inspecting disassembled parts.
TABLE OF CONTENTS:
KOMATSU PC450- 6 PC450LC-6 HYDRAULIC EXCAVATOR SERVICE REPAIR MANUAL (UEBM000100)
01 General........................................................................................................... 21 Specification drawings........................................................................................... 22 Specifications................................................................................................... 23 Weight table..................................................................................................... 25 Fuel, coolant and lubricants..................................................................................... 27 10 Structure and Function............................................................................................ 29 Parts related to engine.......................................................................................... 30 Radiator, oil cooler............................................................................................. 32 Power train...................................................................................................... 33 Final drive...................................................................................................... 34 Swing circle..................................................................................................... 35 Swing machinery.................................................................................................. 36 Track frame, recoil spring....................................................................................... 37 Track shoe....................................................................................................... 38 Hydraulic piping drawing......................................................................................... 40 Hydraulic circuit diagram........................................................................................ 42 Hydraulic tank, hydraulic filter................................................................................. 43 Hydraulic pump................................................................................................... 45 Control valve.................................................................................................... 66 Self-reducing pressure valve..................................................................................... 76 Suction safety valve............................................................................................. 81 CLSS............................................................................................................. 83 Swing motor......................................................................................................148 Center swivel joint..............................................................................................154 Travel motor.....................................................................................................156 Valve control....................................................................................................165 Work equipment * swing PPC valve.................................................................................166 Travel PPC valve.................................................................................................170 Service PPC valve................................................................................................174 PPC safety lock valve............................................................................................177 PPC accumulator..................................................................................................177 PPC shuttle valve, travel junction valve.........................................................................179 LS-EPC valve.....................................................................................................186 Solenoid valve...................................................................................................190 Boom safety valve................................................................................................192 Overload warning device..........................................................................................195 Work equipment...................................................................................................197 Air conditioner..................................................................................................198 Actual electric wiring diagram...................................................................................199 Electric circuit diagram.........................................................................................203 Engine control...................................................................................................206 Electronic control system........................................................................................213 Machine monitor system...........................................................................................240 Breaker mode hydraulic performance...............................................................................251 20 Testing and Adjusting.............................................................................................253 Standard value table.............................................................................................254 Standard value table for engine related parts................................................................254 Standard value table for chassis related parts...............................................................255 Standard value table for electrical parts....................................................................263 Testing and adjusting............................................................................................271 Tools for testing, adjusting, and troubleshooting............................................................272 Measuring engine speed.......................................................................................273 Measuring exhaust color......................................................................................274 Adjusting valve clearance....................................................................................275 Measuring compression pressure...............................................................................276 Measuring blow-by pressure...................................................................................276 Testing and adjusting fuel injection timing..................................................................277 Measuring engine oil pressure................................................................................279 Testing and adjusting fan belt tension.......................................................................280 Testing and adjusting belt tension for air conditioner compressor............................................280 Adjusting engine speed sensor................................................................................281 Measuring air supply pressure (boost pressure)...............................................................282 Testing and adjusting governor motor lever stroke............................................................283 Testing and adjusting hydraulic pressure in work equipment, swing, travel circuit............................284 Testing and adjusting TVC valve output pressure (servo piston input pressure)................................287 Testing and adjusting LS valve output pressure (servo piston input pressure) and LS differential pressure....289 Testing control circuit oil pressure (oil pressure when self-pressure is reduced)............................292 Testing solenoid valve output pressure.......................................................................293 Measuring PPC valve output pressure and testing PPC shuttle valve............................................296 Adjusting work equipment, swing PPC valve....................................................................298 Testing travel deviation.....................................................................................299 Testing locations causing hydraulic drift of work equipment..................................................300 Measuring oil leakage........................................................................................302 Releasing remaining pressure in hydraulic circuit............................................................304 Testing clearance of swing circle bearing....................................................................305 Testing wear of sprocket.....................................................................................306 Testing and adjusting track shoe tension.....................................................................307 Bleeding air.................................................................................................308 Troubleshooting..................................................................................................311 Points to remember when troubleshooting......................................................................312 Sequence of events in troubleshooting........................................................................313 Points to remember when carrying out maintenance.............................................................314 Checks before troubleshooting................................................................................322 Connector types and mounting locations.......................................................................324 Connector arrangement diagram................................................................................326 Connection table for connector pin numbers...................................................................329 Explanation of control mechanism of electrical system........................................................339 Display method of special functions of monitor panel.........................................................340 Method of using judgement table..............................................................................349 Method of using troubleshooting charts.......................................................................351 Details of troubleshooting and troubleshooting procedure.....................................................353 Service code table...........................................................................................358 Troubleshooting of communication abnormality system (N mode).................................................359 Troubleshooting of governor, pump controller (governor control system) (E mode)..............................363 Troubleshooting of engine system (S mode)....................................................................395 Troubleshooting of governor, pump controller (pump control system) (C mode)..................................419 Troubleshooting of governor, pump controller (input signal system) (F mode)..................................467 Troubleshooting of hydraulic, mechanical system (H mode).....................................................481 Troubleshooting of machine monitor system (M mode)...........................................................517 30 Disassembly and Assembly..........................................................................................563 Method of using manual...........................................................................................565 Precautions when carrying out operation..........................................................................567 Special tool list................................................................................................569 40 Maintenance Standard..............................................................................................769 90 Others............................................................................................................817
PLEASE NOTE:
⦁ This is not a physical manual but a digital manual – meaning no physical copy will be couriered to you. The manual can be yours in the next 2 mins as once you make the payment, you will be directed to the download page IMMEDIATELY.
⦁ This is the same manual used by the dealers inorder to diagnose your vehicle of its faults.
⦁ Require some other service manual or have any queries: please WRITE to us at [email protected]
Brody J –