Komatsu Hydraulic Excavator Manual (EN)

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SEBM023600 Shop Manual Supplement PC400 -6 P400LC -6 PC450 -6 PC450LC -6 HYDRAULIC EXCAVATOR SERIAL NUMBERS PC400-6 32488 and up PC400LC-6 32488 and up PC450-6 12629 and up PC450LC-6 12629 and up This manual contains only information related to the PC400 Serial No. 32488 and up, and PC450 Serial No. 12629 and up. For other information, see the PC400, 450 Shop Manual SEBM014506. PC400, 450-6 mount the SAA6D125E-2 engine. For details of the engine, see the 125-2 Series Engine Shop Manual. This material is proprietary to Komatsu America Corp. and is not to be reproduced, used, or disclosed except in accordance with written authorization from Komatsu America Corp..

It is our policy to improve our products whenever it is possible and practical to do so. We reserve the right to make changes or improvements at any time without incurring any obligation to install such changes on products sold previously. Due to this continuous program of research and development, revisions may be made to this publication. It is recommended that customers contact their distributor for information on the latest revision. Copyright 2003 Komatsu Printed in U.S.A. Komatsu America Corp. October 2003

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CONTENTS

CONTENTS No. of page GENERAL Specifications ................................................................................................................ 01-4 01-5 01-6 01-7 Weight table .................................................................................................................. 01-8 01-9 01-10 01-11 STRUCTURE AND FUNCTION Radiator, oil cooler ....................................................................................................... 10-4 Power train ....................................................................................................................

10-5 TESTING AND ADJUSTING Standard value table for engine related parts .......................................................... 20-2 Standard value table for electrical parts .................................................................. 20-11 20-12 20-13 20-14 20-15 20-16 20-17 20-18 Measuring exhaust color ......................................................................................... 20-104 Testing and adjusting fuel injection timing ........................................................... 20-107 20-108 Measuring air supply pressure (boost pressure) ..................................................

20-112 DISASSEMBLY AND ASSEMBLY Turbocharger assembly.............................................................................................. 30-20 Cylinder head assembly ............................................................................................. 30-27 30-28 Aftercooler ................................................................................................................... 30-35 Hydraulic cooler .......................................................................................................... 30-36 30-37 Radiator, hydraulic cooler assembly ........................................................................ 30-38 30-39 30-40 00-2 PC400, 450-6

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SPECIFICATIONS

GENERAL SPECIFICATIONS SPECIFICATIONS BACK HOE PC400, 400LC-6 PC400, 450-6 01-4 Machine model PC400-6 PC400LC-6 Serial number 32488 and up 32488 and up Bucket capacity m3 1.8 1.8 Operating weight kg 41,400 42,600 Performance Working ranges Max. digging depth Max. vertical wall depth Max. digging reach Max. reach at ground level Max. digging height Max. dumping height mm mm mm mm mm mm 7,760 6,850 12,020 11,810 10,920 7,570 7,760 6,850 12,020 11,810 10,920 7,570 Max. digging force (using power max. function) Swing speed Swing max. slope angle Travel speed Gradeability Ground pressure [standard triple grouser shoe width] kN{kg} rpm deg. km/h deg. kPa{kg/cm2} 224.7 {22,900} 9.3 20.0 Lo: 3.2 Mi:

4.5 Hi: 5.5 35 77.42 {0.79} [600 mm] 224.7 {22,900} 9.3 20.0 Lo: 3.2 Mi: 4.5 Hi: 5.5 35 63.7 {0.65} [700 mm] Dimensions Overall length (for transport) Overall width Overall width of track Overall height (for transport) Overall height to top of cab Ground clearance of counterweight Min. ground clearance Tail swing radius Min. swing radius of work equipment Height of work equipment at min. swing radius Length of track on ground Track gauge Height of machine cab mm mm mm mm mm mm mm mm mm mm mm mm mm 11,835 3,340 3,340 3,635 3,265 1,320 554 3,500 4,770 9,200 4,020 2,740 2,715 11,835 3,340 3,340 3,635 3,265 1,320 554 3,500 4,770 9,200 4,350 2,740 2,715

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SPECIFICATIONS

GENERAL SPECIFICATIONS 01-5 PC400, 450-6 Machine model PC400-6 PC400LC-6 Serial number 32488 and up 32488 and up Engine Model Type No. of cylinders – bore x stroke Piston displacement mm ¬ {cc} SAA6D125E-2 4-cycle, water-cooled, in-line, vertical, direct injection, with turbocharger and aftercooler (air cooled) 6 – 125 x 150 11.040 {11,040} Performance Flywheel horsepower Max. torque Max. speed at no load Min. speed at no load Min.

fuel consumption kW/rpm{HP/rpm} Nm/rpm{kgm/rpm} rpm rpm g/kW.h{g/HP.h} 228/2,050 {306/2,050} 1,213/1,500 {123.7/1,500} 2,250 700 208 {155} Starting motor Alternator Battery 24V, 11 kW 24V, 33A 12V, 150 Ah x 2 Radiator core type CWX-5 Under- carriage Carrier roller Track roller Track shoe 2 on each side 7 on each side 8 on each side Assembly-type triple grouser, Assembly-type triple grouser, 46 on each side 49 on each side Hydraulic system Hydraulic pump Type x No. Delivery Set pressure ¬/min. MPa{kg/cm2} HPV160+160, variable displacement piston type x 2 326 x 2 34.8 {355} Control valve Type x No.

Control method 6-spool + 1-spool type + 1-service valve x 1 Hydraulic Hydraulic motor Travel motor Swing motor KMV280ADT, Piston type (with brake valve, shaft brake): x 2 KMF160ABE-3, Piston type (with safety valve, shaft brake, reverse prevention valve): x 1 Hydraulic cylinder Type Inside diameter of cylinder Diameter of piston rod Stroke Max. distance between pins Min. distance between pins mm mm mm mm mm Boom Arm Bucket Double-acting piston 160 110 1,570 3,830 2,260 Double-acting piston 185 120 1,820 4,410 2,590 Double-acting piston 160 110 1,270 3,265 1,995 Hydraulic tank Hydraulic filter Hydraulic cooler Box-shaped, sealed Tank return side Air cooled

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