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WORKSHOP MANUAL

KUBOTA EXCAVATOR

U48-4, U55-4

KiSC issued 03, 2010 A

Summary of Contents for U48-4

Page 1: ...WORKSHOP MANUAL KUBOTA EXCAVATOR U48 4 U55 4 KiSC issued 03 2010 A...

Page 2: ...0 8 HYDRAULIC CYLINDER 3 M82 9 PILOT VALVE 3 M92 10 UNLOAD VALVE 3 M103 11 HOLDING VALVE 3 M107 12 SERVICE PORT 3 M111 SERVICING 1 PUMP 3 S1 2 CONTROL VALVE 3 S34 3 SWIVEL MOTOR 3 S63 4 SWIVEL JOINT 3...

Page 3: ...service work such as troubleshooting or when performing any disassembly or assembly work Q Service This section contains information and procedures for performing maintenance on the backhoe such as t...

Page 4: ...TO THE READER U48 4 U55 4 WSM 2 Record of Revisions Last digit of the Code No Date Main Revised Point and Corrective Measures Person in charge 1 2 3 4 KiSC issued 03 2010 A...

Page 5: ...I INFORMATION KiSC issued 03 2010 A...

Page 6: ...CONTENTS 1 SAFETY FIRST I 1 2 SAFETY DECALS I 4 INFORMATION KiSC issued 03 2010 A...

Page 7: ...cause damage and decrease the engine life RY9212007INI0003US0 SAFETY FIRST This symbol the industry s Safety Alert Symbol is used throughout this manual and on labels on the machine itself to warn of...

Page 8: ...connections before you apply the pressure Do not open a fuel system under high pressure The fluid under high pressure that stays in fuel lines can cause serious injury Do not disconnect or repair the...

Page 9: ...card oil fuel coolant electrolyte and other dangerous waste RY9212007INI0007US0 PREVENT ACID BURNS Keep electrolyte away from your eyes hands and clothing Sulfuric acid in battery electrolyte is poiso...

Page 10: ...t on the machine replace it The decal part number is listed in the parts list RY9212007INI0010US0 DANGER WARNING AND CAUTION LABELS 1 Part No TA040 49580 Do not touch hot parts such as exhaust etc 2 P...

Page 11: ...ch as exhaust etc 2 Part No RD809 57250 Do not allow any persons within the working range 3 Part No T1060 30090 Keep sparks flame cigarettes away 4 Part No TD179 30130 Battery recycle label 5 Part No...

Page 12: ...pulling in the front attachments to make sure that the bucket does not hit the cab 2 Part No RB419 57930 Label front door lock 3 Part No RD809 57430 Fasten the seatbelt 4 Part No 69198 57840 Label man...

Page 13: ...lifting gear 3 Part No RD809 57250 Do not enter the manoeuvring area 4 Part No RB419 57960 Not an attachment point for lifting gear 5 Part No RD451 57480 Diesel fuel only no open fire 6 Part No RA809...

Page 14: ...Replace damaged or missing danger warning and caution labels with new labels from your KUBOTA dealer 4 If a component with danger warning and caution label s affixed is replace with new part make sure...

Page 15: ...G GENERAL KiSC issued 03 2010 A...

Page 16: ...SE FITTINGS G 13 1 Torque for Hydraulic Hose Fittings G 13 2 Torques of Lock Nuts for Elbows with Male Seats and Adaptors with O rings Straight Threads G 14 3 Torque for Tapering Adaptors G 14 4 HOSE...

Page 17: ...dealer about this mini excavator please provide the model of the mini excavator its frame and engine numbers and the number of hours on the hour meter RY9212032GEG0003US0 1 Mini excavator Nameplate M...

Page 18: ...mber Year 1 2001 F 2015 2 2002 G 2016 3 2003 H 2017 4 2004 J 2018 5 2005 K 2019 6 2006 L 2020 7 2007 M 2021 8 2008 N 2022 9 2009 P 2023 A 2010 R 2024 B 2011 S 2025 C 2012 T 2026 D 2013 V 2027 E 2014 M...

Page 19: ...replacement parts from other emission level engines for example E2B engines may result in emission levels out of compliance with the original E3B design EPA and or other applicable regulations Check...

Page 20: ...g Clean the groove the O ring goes in and remove any burrs Apply grease on the O ring when inserting it in the groove Except floating seals When putting the O ring in the groove be careful as it is ea...

Page 21: ...shown in the diagram so the angled side faces the direction of force RY9212001GEG0016US0 Spring Pins When driving a spring pin face the split in the direction that receives the force as shown in the d...

Page 22: ...embly Procedure When assembling an elbow with male seat adhere to the following procedures to prevent deformation of O rings and leaks 1 Connecting to Valves Clean the blow with male seat and the surf...

Page 23: ...oupling push the fitting 2 in the direction of the arrow and pull on the plastic part 1 in the opposite direction To attach a quick coupler push it in firmly in the direction of the arrow Then check t...

Page 24: ...negative battery cable first when disconnecting the battery and attach the positive cable first when connecting it RY9212001GEG0023US0 1 WIRING Tighten wiring terminals securely RY9212001GEG0024US0 K...

Page 25: ...ts may require play in the wiring RY9212001GEG0029US0 Do not pinch or bind wiring when installing parts RY9212001GEG0030US0 After wiring double check terminal protectors and clamps before connecting b...

Page 26: ...CONNECTOR Press the lock to disconnect locking connectors RY9212001GEG0033US0 Hold the connectors when separating them Do not pull on the wire harness to separate the connectors RY9212001GEG0034US0 St...

Page 27: ...st the mini excavator with water or wash it from too close a distance 1 It may cause a fire due to damaged or cuts in the insulation of electrical wiring 2 An injury may result if hydraulic oil gushes...

Page 28: ...o 4 6 29 to 33 32 to 34 3 2 to 3 5 24 to 25 48 to 55 4 9 to 5 7 36 to 41 40 to 44 4 0 to 4 5 29 to 32 61 to 70 6 2 to 7 2 45 to 52 M12 63 to 72 6 4 to 7 4 47 to 53 78 to 90 7 9 to 9 2 58 to 66 63 to 7...

Page 29: ...to 6 5 kgf m 43 4 to 47 0 lbf ft 3 4 117 6 to 127 4 N m 12 0 to 13 0 kgf m 86 8 to 94 0 lbf ft 1 181 3 to 191 1 N m 18 5 to 19 5 kgf m 133 8 to 141 0 lbf ft 1 1 4 220 5 to 230 3 N m 22 5 to 23 5 kgf...

Page 30: ...8 lbf ft 1 2 58 8 to 63 7 N m 6 0 to 6 5 kgf m 43 4 to 47 0 lbf ft 3 4 1 117 6 to 127 4 N m 12 0 to 13 0 kgf m 86 8 to 94 0 lbf ft 1 1 4 220 5 to 230 3 N m 22 5 to 23 5 kgf m 162 8 to 170 0 lbf ft 1...

Page 31: ...19 25 09318 89024 2 5 to 3 4 N m 25 to 35 kgf cm 1 8 to 2 5 lbf ft 31 40 09318 89039 2 5 to 3 4 N m 25 to 35 kgf cm 1 8 to 2 5 lbf ft 36 46 09318 89045 2 5 to 3 4 N m 25 to 35 kgf cm 1 8 to 2 5 lbf ft...

Page 32: ...2821 4 9 to 5 9 N m 50 to 60 kgf cm 3 6 to 4 3 lbf ft 32 44 RD411 63821 4 9 to 5 9 N m 50 to 60 kgf cm 3 6 to 4 3 lbf ft 44 56 35820 15181 4 9 to 5 9 N m 50 to 60 kgf cm 3 6 to 4 3 lbf ft 50 65 RC401...

Page 33: ...ance Performance 16 Bush with flange at arm tip end 5 Bigger Lifting Capacity 17 Prolonged return filter life 500 hours 1000 hours 6 Dual Speed with Auto shift as standard Bigger travel force Safety 7...

Page 34: ...defrosting and demising Emergency exit hammer Front window power assisted with gas damper 12 V power source 2 speakers and radio aerial Location for radio Back mirror left right and rear Cup holder E...

Page 35: ...mm steel track 300 kg Safety system Anti drop valve unit arm and blade Bracket and harness for beacon light Others Special paint upon request RY9212007GEG0003US0 Standard Equipment For Each Type RY92...

Page 36: ...S0 AUX 1 and 2 Operation Control Hard control system The hydraulic control grip has proportional Flow Control built in Signals from this sensor activate the proportional solenoid valve to control the...

Page 37: ...4 adopts the same 3 pump load sensing system as KX057 4 1st and 2nd pumps that normally supply the oil to front attachments change the oil flow to travel actuator when travelling in order to realize t...

Page 38: ...bility L R Rubber F1 Rubber F2 Steel F1 Steel F2 F1 9 0 0 9 rpm 9 0 0 9 rpm 2 8 0 3 km h 1 74 0 2 mph 4 9 0 5 km h 3 04 0 3 mph 2 6 0 3 km h 1 62 0 2 mph 4 6 0 5 km h 2 86 0 3 mph 30 9 3 0 9 rpm 9 3 0...

Page 39: ...d3 550 11 mm 21 7 0 4 in 71 2 54 2 5850 88 mm 230 3 3 in 5710 86 mm 224 8 3 in 1975 40 mm 77 8 2 in 3380 68 mm 133 1 3 in 2670 80 mm 105 1 3 in 5440 109 mm 214 2 4 in 3770 75 mm 148 4 3 in 0 16 0 006...

Page 40: ...50 mm 17 3 2 in 410 50 mm 16 1 2 in 1960 5 mm 77 2 0 2 in 408 10 mm 16 1 0 4 in 440 50 mm 17 3 2 in 410 50 mm 16 1 2 in Bucket tooth slaggish 73 mm 2 87 in Without shockless F 30 kgf 66 lbf Front boo...

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