Kubota WSM D1305-E4B Workshop Manual
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Kubota WSM D1305-E4B Workshop Manual

Kubota WSM D1305-E4B Workshop Manual

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WORKSHOP MANUAL
DIESEL ENGINE
05-E4B SERIES,
05-E4BG SERIES
KiSC issued 03, 2023 A

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Summary of Contents for Kubota WSM D1305-E4B

  • Page 1 WORKSHOP MANUAL DIESEL ENGINE 05-E4B SERIES, 05-E4BG SERIES KiSC issued 03, 2023 A...
  • Page 2 KiSC issued 03, 2023 A...
  • Page 3 Specification which corresponds to new machine's ex-factory. It is based on quality standard, drawings, or actual measurements conducted by Kubota. This value is used to determine whether there is a problem with the machine in the event of a troubleshooting. However, it is necessary to consider degradation due to wear, based on the operating time of the machine, application or maintenance condition.
  • Page 4 KiSC issued 03, 2023 A...
  • Page 5 RECORD OF REVISIONS Main revised contents and corrective measures are described in a table. Find the main revised point and corrective measure through the reference page. Last digit of Month of revi- Reference Main revised point and corrective measure the code No. sion page April 2014...
  • Page 6 05-E4B SERIES,05-E4BG SERIES KiSC issued 03, 2023 A...

  • Page 7: Table Of Contents

    CONTENTS 1. SAFETY SAFETY FIRST..............................1-1 1. Working precautions ..........................1-1 2. Preparing for emergencies ........................1-1 3. Working cautions ............................1-2 4. Starting machine safely ..........................1-2 5. Preventing fires............................1-3 6. Preventing acid burns ..........................1-3 7. Avoiding high pressure fluid........................1-3 8.
  • Page 8 6. Crankshaft bearing 1 replacing tool ......................2-33 7. Governor gear holder bushing replacing tool ..................2-34 8. Crank sleeve setter..........................2-34 3. MAINTENANCE MAINTENANCE CHECKLIST..........................3-1 CHECK AND MAINTENANCE........................... 3-5 1. Daily check points.............................3-5 1.1 Checking engine oil level ........................3-5 1.2 Checking and fill coolant ........................
  • Page 9 1.1.1 Function of closed breather ...................... 4-1 1.2 Half-floating head cover ........................4-1 1.2.1 Outline of half-floating head cover (for D1305-E4B/E4BG) ............4-1 1.3 Governor ............................4-1 1.3.1 Structure of three lever type fork lever (for standard type) ............4-1 1.3.2 Structure of two lever type fork lever (for BG type)..............4-3 1.4 Boost compensator ...........................
  • Page 10 5.17 Removing speed control plate....................... 4-38 5.18 Removing injection pump ......................4-38 5.19 Removing cam gear, idle gear 1, 2 and governor gear ..............4-39 5.20 Removing oil pan and oil strainer (for standard oil pan)..............4-40 5.21 Removing connecting rod ......................4-41 5.22 Removing pistons..........................
  • Page 11 6.43 Checking commutator and mica of starter ..................4-74 6.44 Checking brush wear of starter ..................... 4-75 6.45 Checking brush holder of starter ....................4-76 6.46 Checking armature coil of starter ....................4-76 6.47 Checking field coil of starter ......................4-76 6.48 Checking bearing of alternator ......................
  • Page 12 viii 05-E4B SERIES,05-E4BG SERIES KiSC issued 03, 2023 A...

  • Page 13: Safety

    SAFETY KiSC issued 03, 2023 A...
  • Page 14 KiSC issued 03, 2023 A...

  • Page 15: Safety First

     SAFETY FIRST 1. Working precautions 1. SAFETY SAFETY FIRST This symbol, the industry's "Safety Alert Symbol", is • Stop the engine and remove the key when leaving used throughout this manual and on labels on the the operator's seat for cleaning, maintenance, and machine itself to warn of the possibility of personal servicing.

  • Page 16: Working Cautions

     SAFETY FIRST 1. SAFETY 3. Working cautions 3. Working cautions • Make sure you have the support of the 3 points with both hands holding the handle and one foot at the • Wear proper service attire when performing work. step when getting on and off the machine. Do not wear loose clothing as they could get caught •...

  • Page 17: Preventing Fires

     SAFETY FIRST 5. Preventing fires 1. SAFETY • Connect the positive (+) terminal first when connecting the battery cable. • Do not short circuit the machine. • Do not splash the hydraulic oil on the exhaust components. 6. Preventing acid burns • Lock the covers before starting the machine. •...

  • Page 18: Avoiding Hot Exhaust

     SAFETY FIRST 1. SAFETY 8. Avoiding hot exhaust • Do not work immediately after stopping the engine. engine, muffler, radiator, hydraulic components are extremely hot. • Do not remove caps and plugs soon after stopping the engine. The temperature and pressure of the coolant, hydraulic oil, and fuel are still high.

  • Page 19: General

    GENERAL KiSC issued 03, 2023 A...
  • Page 20 KiSC issued 03, 2023 A...

  • Page 21: General Working Precautions

    • Whenever a special tool is required, use the special tool that Kubota recommends. (A) Alternately (C) Diagonally from center to • Use genuine Kubota parts to ensure safety and (B) Diagonally outside machine performance. 2. Applying thread-locking fluid 1.

  • Page 22: Installing Circlips

     GENERAL WORKING PRECAUTIONS 2. GENERAL 3. Installing circlips • When using liquid gasket, fully remove the old gasket and grease or oil. • When applying liquid gasket, apply it on the joint surface with a thickness of 3.0 to 5.0 mm (0.12 to 0.13 in.) without making any gaps.

  • Page 23: Replacing Oil Seals

     GENERAL WORKING PRECAUTIONS 6. Replacing oil seals 2. GENERAL (1) O-ring groove (3) Burr (1) Packing (6) Grease (2) O-ring (2) Metal ring (7) Masking tape (3) Spring (8) Dust lip (4) Seal lip (A) Air side 6. Replacing oil seals (5) Shaft (B) Airtight side 1.

  • Page 24: Handling Wire Harness

     GENERAL WORKING PRECAUTIONS 2. GENERAL 8. Handling wire harness 8. Handling wire harness CAUTION • Do not let an unprotected wire harness to come in contact with other components. • Do not clamp the wire harness to fuel hoses. • If the wire harness is damaged, replace it immediately with a new one.

  • Page 25: Handling Fuses

     GENERAL WORKING PRECAUTIONS 9. Handling fuses 2. GENERAL 10. Handling connectors • When disconnecting the locking connectors, be sure to disengage the lock before disconnecting. There are two kinds of locks: one requires pressing and the other requires pulling. (2) Wire harness (3) Clamp •...

  • Page 26: Wiring Color

     GENERAL WORKING PRECAUTIONS 2. GENERAL 11. Wiring color 11. Wiring color • Wire colors are specified in the color codes. (1) Missing terminal (4) Rust (2) Bent terminal (3) Sandpaper • Cover the female bullet terminals and male bullet (1) Wire color (2) Stripe terminals securely with the plastic covers.
  • Page 27  GENERAL WORKING PRECAUTIONS   2. GENERAL 05-E4B SERIES,05-E4BG SERIES KiSC issued 03, 2023 A...
  • Page 28  GENERAL WORKING PRECAUTIONS 2. GENERAL   05-E4B SERIES,05-E4BG SERIES KiSC issued 03, 2023 A...

  • Page 29: Engine Identification

     ENGINE IDENTIFICATION 1. Engine model name and engine serial number 2. GENERAL ENGINE IDENTIFICATION 1. Engine model name and Production year engine serial number Alphabet or number Year 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 (1) Engine label (3) Engine model 2011 (2) Emission label (4) Serial number...

  • Page 30: E4B Engine

    The timing or applicable date of the specific non-road emission regulations depends on the engine output classification. Over the past several years, Kubota has been supplying diesel engines that comply with regulations in the respective countries affected by non-road emission regulations.

  • Page 31: Cylinder Number

    Please note: E4B is not marked on the engine. [Example: Engine model name D1105-E4B-XXXX] 3. Cylinder number You can see the cylinder numbers of Kubota diesel engine in the figure. The sequence of cylinder numbers is No.1, No.2, No.3 and No.4 and it starts from the gear case cover side.
  • Page 32  ENGINE IDENTIFICATION 2. GENERAL   2-12 05-E4B SERIES,05-E4BG SERIES KiSC issued 03, 2023 A...

  • Page 33: Information

     INFORMATION 1. Specifications 2. GENERAL INFORMATION 1. Specifications 1.1 Specification for D1005-E4B, D1105-E4B Model D1005-E4B D1105-E4B Number of cylinder Engine type Vertical, water-cooled, 4-cycle diesel engine 76.0 × 73.6 mm 78.0 × 78.4 mm Bore × Stroke (2.99 × 2.90 in.) (3.07 × 3.09 in.) Total displacement 1001 cm (61.08 cu.in.)
  • Page 34  INFORMATION 2. GENERAL 1. Specifications Model D1005-E4B D1105-E4B Class CF lubricating oil as per API classification is recommended. Lubricating oil For details on recommended lubricating oils, see page 3-1. Lubricating oil capacity 5.1 L (1.3 U.S.gals) Weight (Dry) 93.0 kg (205 lbs) NOTE •...

  • Page 35: Specification For D1305-E4B, V1505-E4B

     INFORMATION 1. Specifications 2. GENERAL 1.2 Specification for D1305-E4B, V1505-E4B Model D1305-E4B V1505-E4B Number of cylinder Engine type Vertical, water-cooled, 4-cycle diesel engine 78.0 × 88.0 mm 78.0 × 78.4 mm Bore × Stroke (3.07 × 3.46 in.) (3.07 × 3.09 in.) Total displacement 1261 cm (76.95 cu.in.)

  • Page 36: Specification For D1005-E4Bg, D1105-E4Bg

     INFORMATION 2. GENERAL 1. Specifications 1.3 Specification for D1005-E4BG, D1105-E4BG D1005-E4BG D1105-E4BG Model Number of cylinder Engine type Vertical, water-cooled, 4-cycle diesel engine 76.0 × 73.6 mm 78.0 × 78.4 mm Bore × Stroke (2.99 × 2.90 in.) (3.07 × 3.09 in.) Total displacement 1001 cm (61.08 cu.in.)

  • Page 37: Specification For D1305-E4Bg, V1505-E4Bg

     INFORMATION 1. Specifications 2. GENERAL 1.4 Specification for D1305-E4BG, V1505-E4BG D1305-E4BG V1505-E4BG Model Number of cylinder Engine type Vertical, water-cooled, 4-cycle diesel engine 78.0 × 88.0 mm 78.0 × 78.4 mm Bore × Stroke (3.07 × 3.46 in.) (3.07 × 3.09 in.) Total displacement 1261 cm (76.95 cu.in.)

  • Page 38: Performance Curves

     INFORMATION 2. GENERAL 2. Performance curves 2. Performance curves 2.1 Performance curve for D1005-E4B D1005-E4B (3000 rpm) 2-18 05-E4B SERIES,05-E4BG SERIES KiSC issued 03, 2023 A...
  • Page 39  INFORMATION 2. Performance curves 2. GENERAL (1) Brake horsepower (3) B.S.F.C. (Brake specific fuel (4) Torque (2) Engine speed consumption) 2-19 05-E4B SERIES,05-E4BG SERIES KiSC issued 03, 2023 A...
  • Page 40  INFORMATION 2. GENERAL 2. Performance curves 2.2 Performance curve for D1005-E4B D1005-E4B (3200 rpm) (1) Brake horsepower (3) B.S.F.C. (Brake specific fuel (4) Torque (2) Engine speed consumption) 2-20 05-E4B SERIES,05-E4BG SERIES KiSC issued 03, 2023 A...

  • Page 41: Performance Curve For D1105-E4B

     INFORMATION 2. Performance curves 2. GENERAL 2.3 Performance curve for D1105-E4B D1105-E4B (1) Brake horsepower (3) B.S.F.C. (Brake specific fuel (4) Torque (2) Engine speed consumption) 2-21 05-E4B SERIES,05-E4BG SERIES KiSC issued 03, 2023 A...

  • Page 42: Performance Curve For D1305-E4B

     INFORMATION 2. GENERAL 2. Performance curves 2.4 Performance curve for D1305-E4B D1305-E4B (1) Brake horsepower (3) B.S.F.C. (Brake specific fuel (4) Torque (2) Engine speed consumption) 2-22 05-E4B SERIES,05-E4BG SERIES KiSC issued 03, 2023 A...

  • Page 43: Performance Curve For V1505-E4B

     INFORMATION 2. Performance curves 2. GENERAL 2.5 Performance curve for V1505-E4B V1505-E4B (1) Brake horsepower (3) B.S.F.C. (Brake specific fuel (4) Torque (2) Engine speed consumption) 2-23 05-E4B SERIES,05-E4BG SERIES KiSC issued 03, 2023 A...

  • Page 44: Dimensions

     INFORMATION 2. GENERAL 3. Dimensions 3. Dimensions 3.1 Dimension for D1005-E4B, D1105-E4B D1005-E4B, D1105-E4B D1005-E4B D1105-E4B 497.8 mm (19.60 in.) 497.8 mm (19.60 in.) 230 mm (9.06 in.) 230 mm (9.06 in.) 330 mm dia. (13.0 in. dia.) 330 mm dia. (13.0 in. dia.) 396 mm (15.6 in.) 396 mm (15.6 in.) 194 mm (7.64 in.)

  • Page 45: Dimension For D1305-E4B

     INFORMATION 3. Dimensions 2. GENERAL 3.2 Dimension for D1305-E4B D1305-E4B D1305-E4B 497.6 mm (19.59 in.) 590.1 mm (23.23 in.) 396.0 mm (15.59 in.) 185.3 mm (7.295 in.) 125 mm dia. (4.92 in. dia.) 222.2 mm dia. (8.748 in. dia.) 2-25 05-E4B SERIES,05-E4BG SERIES KiSC issued 03, 2023 A...

  • Page 46: Dimension For V1505-E4B

     INFORMATION 2. GENERAL 3. Dimensions 3.3 Dimension for V1505-E4B V1505-E4B V1505-E4B 591.3 mm (23.28 in.) 230 mm (9.06 in.) 370 mm dia. (14.6 in. dia.) 396 mm (15.6 in.) 194 mm (7.64 in.) 607.0 mm (23.90 in.) 238.5 mm (9.390 in.) 200 mm (7.87 in.) 250.81 to 251.12 mm dia.

  • Page 47: Dimension For D1005-E4Bg, D1105-E4Bg, V1505-E4Bg

     INFORMATION 3. Dimensions 2. GENERAL 3.4 Dimension for D1005-E4BG, D1105-E4BG, V1505-E4BG D1005-E4BG, D1105-E4BG, V1505-E4BG 2-27 05-E4B SERIES,05-E4BG SERIES KiSC issued 03, 2023 A...
  • Page 48  INFORMATION 2. GENERAL 3. Dimensions D1005-E4BG D1105-E4BG V1505-E4BG 546.6 mm (21.52 in.) 546.6 mm (21.52 in.) 634.3 mm (24.97 in.) 4-3/8-16 UNC-2B 4-3/8-16 UNC-2B 4-3/8-16 UNC-2B Depth 16 mm (0.63 in.) Depth 16 mm (0.63 in.) Depth 16 mm (0.63 in.) 608.7 mm (23.96 in.) 608.7 mm (23.96 in.) 613.7 mm (24.16 in.) 360 mm (14.2 in.)

  • Page 49: Dimension For D1305-E4Bg

     INFORMATION 3. Dimensions 2. GENERAL 3.5 Dimension for D1305-E4BG D1305-E4BG 2-29 05-E4B SERIES,05-E4BG SERIES KiSC issued 03, 2023 A...
  • Page 50  INFORMATION 2. GENERAL 3. Dimensions D1305-E4BG 551.3 mm (21.70 in.) 4-3/8-16 UNC-2B Depth 16 mm (0.63 in.) 590.1 mm (23.23 in.) 360 mm (14.2 in.) 333.38 mm dia. (13.125 in. dia.) 200.02 mm dia. (7.8748 in. dia.) 356 mm dia. (14.0 in. dia.) 296 mm dia.

  • Page 51: Special Tools

     SPECIAL TOOLS 1. Diesel engine compression tester (for nozzle hole) 2. GENERAL SPECIAL TOOLS 1. Diesel engine compression tester (for nozzle hole) Use to measure diesel engine compression and diagnosis of need for major overhaul. (1) Gauge (7) Adapter F (2) L joint (8) Adapter G (3) Adapter A (9) Adapter H...

  • Page 52: Valve Guide Replacing Tool

     SPECIAL TOOLS 2. GENERAL 3. Valve guide replacing tool 8.0 mm dia. (0.31 in. dia.) 1.0 mm (0.039 in.) 17 mm dia. (0.67 in. dia.) 6.10 to 6.20 mm dia. (0.241 to 0.244 in. dia.) 8.0 mm (0.31 in.) 4.0 mm (0.16 in.) 11.97 to 11.99 mm dia.

  • Page 53: Flywheel Stopper

     SPECIAL TOOLS 5. Flywheel stopper 2. GENERAL [For small end bushing] 140 mm (5.51 in.) 157 mm (6.18 in.) 80 mm (3.1 in.) 24 mm (0.94 in.) 49.3 mm (1.94 in.) 120 mm (4.72 in.) 49.3 mm (1.94 in.) 21.8 to 21.9 mm dia. (0.859 to 23.8 mm (0.937 in.) 0.862 in.

  • Page 54: Governor Gear Holder Bushing Replacing Tool

     SPECIAL TOOLS 2. GENERAL 7. Governor gear holder bushing replacing tool 72 mm (2.8 in.) 40 mm radius (1.6 in. radius) 10 mm (0.39 in.) 24 mm (0.94 in.) 20 mm dia. (0.79 in. dia.) 51.20 to 51.40 mm dia. (2.016 to 2.023 in. dia.) 47.30 to 47.50 mm dia.
  • Page 55  SPECIAL TOOLS   2. GENERAL 73 mm dia. (2.9 in. dia.) 83 mm dia. (3.3 in. dia.) C0.3 Chamfer 0.30 mm (0.012 in.) Chamfer 1.0 mm (0.039 in.) Chamfer 5.0 mm (0.20 in.) [B] Sleeve guide 42 mm (1.7 in.) 12 mm (0.47 in.) 30 mm (1.2 in.) M10 ×...
  • Page 56  SPECIAL TOOLS 2. GENERAL   2-36 05-E4B SERIES,05-E4BG SERIES KiSC issued 03, 2023 A...

  • Page 57: Maintenance

    MAINTENANCE KiSC issued 03, 2023 A...
  • Page 58 KiSC issued 03, 2023 A...

  • Page 59: Maintenance Checklist

     MAINTENANCE CHECKLIST   3. MAINTENANCE MAINTENANCE CHECKLIST To make sure that the engine operates safely for a long time, refer to the table to do regular inspections. Service interval Every Item 1 or 2 1500 3000 50 hrs 100 hrs 200 hrs 400 hrs 500 hrs month...
  • Page 60 ★ The items listed above (* marked) are registered as emission related critical parts by Kubota in the U.S. EPA non-road emission regulation. As the engine owner, you are responsible for the performance of the required maintenance on the engine according to the above instruction.
  • Page 61 • No. 2-D is a distillate fuel of lower volatility for engines in industrial and heavy mobile service. (SAE J313 JUN87) • Since Kubota diesel engines of less than 56 kW (75 hp) utilize EPA tier 4 and interim tier 4 standards, the use of low sulfur fuel or ultra low sulfur fuel is mandatory for these engines, when operated in US EPA regulated areas.
  • Page 62   3. MAINTENANCE   05-E4B SERIES,05-E4BG SERIES KiSC issued 03, 2023 A...

  • Page 63: Check And Maintenance

     CHECK AND MAINTENANCE 1. Daily check points 3. MAINTENANCE CHECK AND MAINTENANCE 1. Daily check points loosen the cap slightly to relieve any excess pressure before removing the cap completely. 1.1 Checking engine oil level IMPORTANT IMPORTANT • During filling the coolant, air must be vented •...

  • Page 64: Check Points Of Initial 50 Hours

    • To prevent serious damage to the engine, replacement element must be highly efficient. Use only a Kubota genuine filter or its equivalent. 1. Remove the oil filter cartridge with the filter wrench. 2. Apply a slight coat of oil onto the new cartridge gasket.

  • Page 65: Check Point Of Every 50 Hours

     CHECK AND MAINTENANCE 3. Check point of every 50 hours 3. MAINTENANCE • After the new cartridge has been replaced, the (When bleeding fuel system) engine oil normally decrease a little. Thus see that NOTE the engine oil does not leak through the seal and be •...

  • Page 66: Check Points Of Every 100 Hours

     CHECK AND MAINTENANCE 3. MAINTENANCE 4. Check points of every 100 hours 4. Check points of every 100 hours 4.1 Cleaning air cleaner element NOTE • The air cleaner uses a dry element. Never apply oil to it. • Do not operate the engine with filter element removed.

  • Page 67: Checking Fan Belt Damage And Wear

     CHECK AND MAINTENANCE 4. Check points of every 100 hours 3. MAINTENANCE 1. Check the tension of fan belt at the position (A) between the fan drive pulley and alternator pulley with sonic belt tension meter. NOTE • If the measurement is out of the service specifications, loosen alternator...

  • Page 68: Checking Battery Electrolyte Level

    • Upon an oil change, be sure to replace the • To prevent serious damage to the engine, gasket with a new one. replacement element must be highly efficient. Use only a Kubota genuine filter or its 1. Start and warm up the engine for approx. equivalent. 5 minutes.

  • Page 69: Checking Radiator Hoses And Clamp Bands

    IMPORTANT • To prevent serious damage to the engine, replacement element must be highly efficient. Use only a Kubota genuine filter or its equivalent. 1. Remove the oil filter cartridge with the filter wrench. 2. Apply a slight coat of oil onto the new cartridge gasket.

  • Page 70: Replacing Fuel Filter Element

     CHECK AND MAINTENANCE 3. MAINTENANCE 6. Check points of every 400 hours 5. Start engine and check for fuel leakage. relieve any excess pressure before removing cap completely. IMPORTANT • Do not start engine without coolant. • Use clean, fresh, soft water and anti-freeze to fill the radiator and recovery tank.

  • Page 71: Replacing Fan Belt

     CHECK AND MAINTENANCE 7. Check points of every 500 hours 3. MAINTENANCE 7. Fill with coolant up to full (A) mark on the recovery agent to make sludge and cause damages to tank (3). the engine parts. (3) Recovery tank (B) Low (A) −0 ℃...

  • Page 72: Check Points Of Every 1 Or 2 Months

     CHECK AND MAINTENANCE 3. MAINTENANCE 8. Check points of every 1 or 2 months 5. Check and adjust the fan belt tension. Sonic belt tension meter setting value Mass 75 g/rib/m (Mass per 1 rib 1 m of belt) Width (Number of ribs) Measure at location (A) in the figure with (L) as the distance Span L...

  • Page 73: Checking Battery Specific Gravity

     CHECK AND MAINTENANCE 8. Check points of every 1 or 2 months 3. MAINTENANCE Quick charging 3. If the specific gravity is less than 1.215 (after it is 1. Determine proper charging current corrected for temperature), charge or replace the charging time with the tester attached to the quick battery.

  • Page 74: Check Points Of Every 1500 Hours

     CHECK AND MAINTENANCE 3. MAINTENANCE 11. Check points of every 1500 hours 11. Check points of every 1500 4. If clearance within service specifications, adjust with the adjusting screw. hours 5. Then turn the flywheel 6.28 rad (360°), and align the [1TC] mark (1) on the flywheel and alignment mark (2) on the rear end plate so that the No.

  • Page 75: Checking Valve Seat Tightness

     CHECK AND MAINTENANCE 11. Check points of every 1500 hours 3. MAINTENANCE 3. If the measurement is not within the service shim of the combination (injection pump side), specifications, replace the adjusting washer in the because this can cause oil leakage. nozzle holder to adjust it. •...

  • Page 76: Checking Injection Pump

    12.2 Checking injection pump NOTE • Never try to disassemble the injection pump assembly. repairs, strongly requested to contact a Kubota-authorized pump service shop. Tools required • Injection pump pressure tester 3-18 05-E4B SERIES,05-E4BG SERIES KiSC issued 03, 2023 A...

  • Page 77: Check Points Of Every 2 Years

    • Never check battery charge by placing a metal Kubota-authorized pump service shop. object across the posts. 10 seconds 1. Disconnect the negative terminal and positive Service specifi- 13.73 to 12.75 MPa...

  • Page 78: Replacing Fuel Hoses And Clamp Bands

     CHECK AND MAINTENANCE 3. MAINTENANCE 13. Check points of every 2 years 4. Replace with the new upper / lower hose (1), (2) and clamp bands. (1) Fuel hose [B] Element type (2) Clamp [A] Cartridge type (1) Upper hose (2) Lower hose (When bleeding fuel system) 5.

  • Page 79: Changing Radiator Coolant (L.l.c.)

     CHECK AND MAINTENANCE 13. Check points of every 2 years 3. MAINTENANCE 4. Open the air vent valve on top of the fuel injection pump. 5. If equipped electrical fuel feed pump, turn the key to AC position and pump the fuel up for 10 to 15 seconds.
  • Page 80  CHECK AND MAINTENANCE 3. MAINTENANCE 13. Check points of every 2 years 9. Stop the engine and let cool. Check coolant level of • When you add anti-freeze for the first time, flush radiator and recovery tank (3) and add coolant if the water jacket and radiator interior with clean, necessary.

  • Page 81: Engine

    ENGINE KiSC issued 03, 2023 A...
  • Page 82 KiSC issued 03, 2023 A...

  • Page 83: Mechanism

     MECHANISM 1. Engine body 4. ENGINE MECHANISM 1. Engine body 1.1 Closed breather 1.1.1 Function of closed breather Closed breather system has been adopted to prevent the release of blow-by gas into the atmosphere. After its oil content is filtered by oil shield (4), the blow by gas in fed back to the intake manifold through breather valve (3) to be used for re-combustion.
  • Page 84  MECHANISM 4. ENGINE 1. Engine body (1) Max. torque limiter (9) Fork lever 2 (6) Fork lever 1 (10) Fuel limitation bolt (7) Floating lever (Overloaded operation) The amount of the movement of the fork lever assembly is limited with the fuel limitation bolt (10) and (1) Max.

  • Page 85: Structure Of Two Lever Type Fork Lever (For Bg Type)

     MECHANISM 1. Engine body 4. ENGINE (1) Idle speed adjust bolt (4) Fork lever 2 (2) Slide plate (5) Governor spring (3) Fork lever 1 (6) Fork lever shaft (1) Max. torque limiter (10) Fuel limitation bolt (6) Fork lever 1 (a) Distance to which torque pin (7) Floating lever (8) pushes fork lever 1 (6) (8) Torque pin...

  • Page 86: Boost Compensator

     MECHANISM 4. ENGINE 1. Engine body 1.4 Boost compensator 1.4.1 Function of boost compensator Boost compensator is the device that reduces black smoke during the engine startup and acceleration. The rod of actuator (2) is pushed out by the rise of boost pressure, and the plate (3) moves in the direction of the fuel increase around the fulcrum "A".

  • Page 87: Servicing

     SERVICING 1. Troubleshooting 4. ENGINE SERVICING 1. Troubleshooting 1.1 Troubleshooting for 05-E4, 05-E4BG Refer- Probable cause and checking Symptom Solution ence procedure page The engine does not start 1. No fuel Fill up the fuel － 2. Air in the fuel system Bleed the air －...
  • Page 88  SERVICING 4. ENGINE 1. Troubleshooting Refer- Probable cause and checking Symptom Solution ence procedure page The starter does not operate 1. Discharged battery Charge or replace 4-25 2. The starter is damaged Repair or replace 4-27 3. The key switch is damaged Replace －...
  • Page 89  SERVICING 1. Troubleshooting 4. ENGINE Refer- Probable cause and checking Symptom Solution ence procedure page The output is deficient 5. There is compression leakage Check the compression pressure 4-17 and repair 6. The air cleaner is dirty or clog- Clean or replace the element 3-15 The lubricant oil consumption is 1.
  • Page 90  SERVICING 4. ENGINE 1. Troubleshooting Refer- Probable cause and checking Symptom Solution ence procedure page The oil pressure is low 8. Excessive oil clearance of Replace 4-33 rocker arm 9. The oil passage is clogged Clean － 10. The type of oil used is incor- Use the specified type of oil rect 11.

  • Page 91: Servicing Specifications

     SERVICING 2. Servicing specifications 4. ENGINE 2. Servicing specifications 2.1 Servicing specification for engine Engine body Item Service specification Service limit 0.05 mm Cylinder head surface Flatness － 0.002 in. D1005-E4B / E4BG 0.55 to 0.75 mm D1105-E4B / E4BG － 0.022 to 0.029 in. V1505-E4B / E4BG Top clearance 0.80 to 1.0 mm...
  • Page 92  SERVICING 4. ENGINE 2. Servicing specifications Item Service specification Service limit 0.25 mm Push rod Alignment － 0.0098 in. 0.020 to 0.062 mm 0.07 mm Tappet to tappet guide bore Oil clearance 0.00079 to 0.0024 in. 0.003 in. 19.959 to 19.980 mm •...
  • Page 93  SERVICING 2. Servicing specifications 4. ENGINE Item Service specification Service limit 0.30 to 0.45 mm 1.25 mm Top ring 0.012 to 0.017 in. 0.0492 in. Piston ring gap 0.30 to 0.45 mm 1.25 mm Second ring D1005-E4B / E4BG 0.012 to 0.017 in. 0.0492 in.
  • Page 94  SERVICING 4. ENGINE 2. Servicing specifications Item Service specification Service limit 51.921 to 51.940 mm • Crankshaft journal O.D. － 2.0442 to 2.0448 in. 51.974 to 52.024 mm • Crankshaft bearing 2 I.D. － 2.0463 to 2.0481 in. Crankshaft journal to crankshaft 0.0340 to 0.103 mm 0.20 mm Oil clearance...
  • Page 95  SERVICING 2. Servicing specifications 4. ENGINE Cooling system Item Service specification Service limit 69.5 to 72.5 ℃ Valve opening temperature － 157.1 to 162.5 ℉ At beginning Thermostat 85 ℃ Valve opening temperature － 185 ℉ Opened completely Radiator Water tightness No leak at specified pressure －...
  • Page 96  SERVICING 4. ENGINE 2. Servicing specifications Fuel system Item Service specification Service limit 0.3011 to 0.3272 rad Injection timing 17.25 to 18.75° － (3000 min (rpm)) before T.D.C. Injection pump D1005-E4B 0.3360 to 0.3621 rad Injection timing 19.25 to 20.75° － (3200 min (rpm)) before T.D.C.
  • Page 97  SERVICING 2. Servicing specifications 4. ENGINE Electrical system Item Service specification Service limit Approx. Glow plug Resistance － 0.9 Ω Electromagnetic drive type 28.0 mm 27.0 mm O.D. 1.10 in. 1.06 in. Commutator (Starter) Gear reduction type 30.0 mm 29.0 mm O.D. 1.18 in.

  • Page 98: Tightening Torques

     SERVICING 4. ENGINE 3. Tightening torques 3. Tightening torques Refer to the following table if the tightening torques of screws, bolts and nuts are not specified in each part. 3.1 Tightening torques of screws, bolts and nuts for general use If the tightening torque is not specified, refer to the table below for the none specified torques values. Indication on top No-grade or 4T of bolt...

  • Page 99: Checking And Adjusting

     SERVICING 4. Checking and adjusting 4. ENGINE Dimension Item N⋅m kgf⋅m lbf⋅ft × Pitch *Idle gear shaft screw M6 × 1.0 9.81 to 11.2 1.00 to 1.15 7.24 to 8.31 *Fan drive pulley screw M14 × 1.5 236 to 245 24.0 to 25.0 174 to 180 Bearing case cover mounting screw M6 ×...

  • Page 100: Checking Valve Clearance

     SERVICING 4. ENGINE 4. Checking and adjusting 7. Measure a maximum value of the compression 6. Check the following valve clearance marked with pressure. "☆" using a feeler gauge. 3.73 to 4.11 MPa / 3 cylinder 4 cylinder Adjustable cylinder loca- 200 min (rpm) tion of piston Reference val-...

  • Page 101: Checking Fan Belt Tension

     SERVICING 4. Checking and adjusting 4. ENGINE 2. Set the oil pressure tester. NOTE 3. Operate the engine for warming-up. • If the measurement is out of the service specifications, loosen alternator 4. Measure the oil pressure at the idle speed and mounting screws and adjust its position.

  • Page 102: Checking Fan Belt Damage And Wear

     SERVICING 4. ENGINE 4. Checking and adjusting NOTE • If it is "Bad" (B), replace it. 4.6 Checking radiator cap air leakage CAUTION • Remove the radiator cap only after you stop the engine for a minimum of 10 minutes to decrease its temperature.

  • Page 103: Checking Opening Temperature Of Thermostat Valve

     SERVICING 4. Checking and adjusting 4. ENGINE Thus, refer to the test pressure of each radiator specification to do the leakage test. Tools required • Radiator tester and an adapter 1. Fill a specified quantity of water into the radiator. 2. Set a radiator tester and an adapter on the radiator. 3.

  • Page 104: Checking Fuel Tightness Of Pump Element

     SERVICING 4. ENGINE 4. Checking and adjusting 6. Check and read the timing line (2) of flywheel that matches the alignment mark (3). NOTE • The flywheel has mark "[1TC]", "[10]" and "[20]" for the crank angle before the top dead center of No. 1 cylinder. (4) Shim (soft metal gasket (7) Without hole: 0.30 mm shim)

  • Page 105: Checking Fuel Tightness Of Delivery Valve

    7. Measure the time until the pressure drops. limit, replace the pump with a new one or NOTE repair it at a Kubota-authorized pump • If the measurement is less than service limit, service shop. replace the pump with a new one or repair it •...

  • Page 106: Checking Fuel Injection Pressure

     SERVICING 4. ENGINE 4. Checking and adjusting • If the fume from the nozzle directly contacts the 2. Slowly move the nozzle tester's handle to measure human body, cells may be destroyed and blood the pressure at which the fuel begins to jet out from poisoning may be caused.

  • Page 107: Adjusting Injection Nozzle

     SERVICING 4. Checking and adjusting 4. ENGINE 1. Set the injection nozzle to the nozzle tester. (When reassembling) • Assemble the nozzle in clean fuel oil. • Install the push rod (4), noting its direction. • After assembling the nozzle, be sure to adjust the fuel injection pressure.

  • Page 108: Checking Battery Specific Gravity

     SERVICING 4. ENGINE 4. Checking and adjusting 2. Measure the voltage with a circuit tester between • Keep your body and face as far away from the the battery terminals. battery when performing maintenance and inspection. Service specifi- • Do not allow people who do not know how to Battery voltage More than 12 V cation...

  • Page 109: Checking Starter Motor

     SERVICING 4. Checking and adjusting 4. ENGINE IMPORTANT • Do not disconnect or remove the battery when you operate engine. NOTE • B terminal: It is the terminal that connects the cable from the battery to the starter. • C terminal: It is the terminal that connects the cable from the motor to the magnet switch.

  • Page 110: Checking Magnetic Switch Of Starter

     SERVICING 4. ENGINE 4. Checking and adjusting 4.19 Checking magnetic switch of starter CAUTION • To prevent an accidental short circuit, attach the positive cable to the positive terminal before the negative cable is attached to the negative terminal. • Do not remove the battery cap while the engine operates.

  • Page 111: Checking Alternator On Unit

     SERVICING 4. Checking and adjusting 4. ENGINE 2. Check the continuity across the C terminal (1) and • Keep open sparks and flames away from the the B terminal (2) with a circuit tester. battery at all times. Hydrogen gas mixed with oxygen becomes very NOTE explosive.

  • Page 112: Checking Glow Plug Continuity

     SERVICING 4. ENGINE 4. Checking and adjusting 4.24 Checking engine stop solenoid 2. Measure the voltage between the glow lead terminal and the engine body with a circuit tester. IMPORTANT NOTE • Never apply the current for pulling coil more • If the voltage differs from the battery than 2 seconds when inspecting.

  • Page 113: Disassembling And Assembling

     SERVICING 5. Disassembling and assembling 4. ENGINE 5. Disassembling and • Check to see that there are no cracks on the belt surface. assembling 5.1 Draining oil and coolant 5.4 Removing cylinder head cover 1. Disconnect the breather hose (1). CAUTION 2. Remove the cylinder head cover screw (2). •...

  • Page 114: Removing Injection Pipes

     SERVICING 4. ENGINE 5. Disassembling and assembling 5.5 Removing injection pipes 1. Loosen the screws to the pipe clamp (1). 2. Remove the injection pipes (2). (1) Overflow pipe (4) Nozzle holder assembly (2) Lead (1) Pipe clamp (2) Injection pipe (3) Glow plug (When reassembling) (When reassembling) •...

  • Page 115: Removing Rocker Arm And Push Rod

     SERVICING 5. Disassembling and assembling 4. ENGINE 3. While turning the screw driver, slowly pull the heat seal (4) out together with the injection nozzle gasket (3). (1) Rocker arm assembly [B] D1305-E4B/E4BG (2) Push rod [A] D1005-E4B/E4BG, D1105- E4B/E4BG, V1505-E4B/ E4BG (When reassembling) (1) Plus screw driver (4) Heat seal...

  • Page 116: Removing Cylinder Head And Cylinder Head Gasket

     SERVICING 4. ENGINE 5. Disassembling and assembling 5.9 Removing cylinder head and cylinder head gasket 1. Loosen the pipe clamps (1), and remove the water return pipe (2). (3) Pin pipe • The cylinder head should be free of scratches and dust. •...

  • Page 117: Removing Valves

     SERVICING 5. Disassembling and assembling 4. ENGINE 5.11 Removing valves 1. Remove the valve caps (2). 2. Remove the valve spring collet (3), pushing the valve spring retainer (4) by valve spring replacer (1). 3. Remove the valve spring retainer (4), valve spring (5) and valve stem seal (6).

  • Page 118: Removing Fan Drive Pulley

     SERVICING 4. ENGINE 5. Disassembling and assembling 2. Remove the gear case. • After cleaning the oil strainer, check to see that the filter mesh in clean, and install it. • Visually check the O-ring, apply engine oil, and install it. • Securely fit the O-ring to the oil strainer. •...

  • Page 119: Removing Boost Compensator (Equipped With R24 Model)

     SERVICING 5. Disassembling and assembling 4. ENGINE (2) Boost compensator assem- (6) Guide (7) Control rack (3) Stop solenoid mounting bolt 1. Disconnect the hose (4). (1) Gear case (c) Bolt length = 55 mm (2.2 in.) 2. Remove the stop solenoid mounting bolt (M6 × [A] Gear case for standard oil (d) Bolt length = 65 mm (2.6 in.) 87 mm) (3).

  • Page 120: Removing Speed Control Plate

     SERVICING 4. ENGINE 5. Disassembling and assembling 7. Remove the stop solenoid mounting bolt (3) with boost compensator assembly (2). (1) Plate (2) Governor spring (When reassembling) • Apply a liquid gasket (Three Bond 1215 or equivalent) to both sides of the solenoid cover gasket and control plate gasket.
  • Page 121  SERVICING 5. Disassembling and assembling 4. ENGINE 2. Align the control rack pin (2) with the notch (1) on To remove the governor shaft, follow the the crankcase, and remove the injection pump (3). procedures in 5, 6 and never remove fork lever and the max torque limiter.

  • Page 122: Removing Oil Pan And Oil Strainer (For Standard Oil Pan)

     SERVICING 4. ENGINE 5. Disassembling and assembling 4. Remove the camshaft stopper bolt. • Check the governor shaft for smooth rotation. 5. Remove the cam gear (3) with camshaft. 5.20 Removing oil pan and oil strainer (for standard oil pan) 1. Remove the oil pan mounting screws (5). 2.

  • Page 123: Removing Connecting Rod

     SERVICING 5. Disassembling and assembling 4. ENGINE 5.21 Removing connecting rod 1. Remove the connecting rod cap. (When reassembling) • Align the marks (a) with each other. (Face the marks toward the injection pump.) 3. Draw out the other piston in the same method as above.

  • Page 124: Removing Piston Ring And Connecting Rod

     SERVICING 4. ENGINE 5. Disassembling and assembling (1) Piston ring compressor (12) Manufacturer's mark • When installing the oil ring onto the piston, place • Before inserting the piston into the cylinder, apply the expander joint (10) on the opposite side of the enough engine oil to the piston.

  • Page 125: Removing Flywheel

     SERVICING 5. Disassembling and assembling 4. ENGINE 5.24 Removing flywheel 1. Secure the flywheel to keep it from turning, using a flywheel stopper. 2. Remove all flywheel screws (1) and then remove the flywheel (2). (1) Bearing case cover mount- (a) Top mark "UP" ing screw (Inside) (Long) (2) Bearing case cover mount- ing screw (Outside) (Short)

  • Page 126: Removing Crankshaft Assembly (Except D1305-E4B/E4Bg)

     SERVICING 4. ENGINE 5. Disassembling and assembling 5.27 Removing crankshaft assembly • Apply engine oil to the oil seal (5) lip and be careful that it is not rolled when installing. (D1305-E4B/E4BG) • Tighten the bearing case cover mounting screws with even force on the diagonal line. 1.

  • Page 127: Removing Main Bearing Case Assembly

     SERVICING 5. Disassembling and assembling 4. ENGINE (When reassembling) 2. Remove the main bearing case from crankshaft. • Clean the oil passage of the crankshaft with (When reassembling) compressed air. • Clean the oil passage in the main bearing cases. • Install the crankshaft assembly, aligning the screw •...

  • Page 128: Removing Starter (Electromagnetic Drive Type)

     SERVICING 4. ENGINE 5. Disassembling and assembling 11. Lightly secure the rotor with a vise to prevent damage, and remove the bearing (7) with a puller. (1) Pulley (5) Retainer plate (9) Rectifier (2) Drive end frame (6) Rotor (10) IC regulator (3) Stator (7) Bearing (11) Brush holder...
  • Page 129  SERVICING 5. Disassembling and assembling 4. ENGINE 2. Remove the solenoid switch mounting nuts (1) and solenoid switch (5). 3. Remove the end frame cap (17). 4. Remove the brake shoe (16), brake spring (15) and gasket (14). 5. Remove the through bolts (22) and rear end frame (13). 6.

  • Page 130: Removing Starter (Gear Reduction Type)

     SERVICING 4. ENGINE 5. Disassembling and assembling (When reassembling) • Apply grease (DENSO.CO.LTD. No. 50 or equivalent) to the parts indicated in the figure. – Joint of solenoid switch (a) – Bushing (b) – Drive lever (c) – Collar (d) – Teeth of pinion gear (e) –...

  • Page 131: Servicing

     SERVICING 6. Servicing 4. ENGINE 11. Remove the plunger (11). (1) Through bolt (5) Armature (9) Brush holder (13) Housing (2) Brush (6) Overrunning clutch (10) Magnet switch cover (3) C terminal nut (7) Idle gear (11) Plunger (4) Yoke (8) End frame (12) B terminal nut (When reassembling) •...

  • Page 132: Checking Cylinder Head Surface Flatness

     SERVICING 4. ENGINE 6. Servicing (1) Plastigauge (2) Crushed plastigauge (3) Scale 3. Take the piston to an intermediate position, install the cylinder head and tighten the cylinder head 6.2 Checking cylinder head surface mounting screw to the specified torque. flatness NOTE Tools required •...

  • Page 133: Checking Cylinder Head Flaw

     SERVICING 6. Servicing 4. ENGINE 3. Measure the clearance with a feeler gauge. NOTE • If the measurement is more than the service limit, replace the cylinder head. IMPORTANT • Check the valve recessing after you replace. Cylinder head sur- 0.05 mm Service limit face flatness 0.002 in.

  • Page 134: Adjusting Valve Lapping

     SERVICING 4. ENGINE 6. Servicing 3. Measure the valve recessing with a depth gauge. NOTE • If the measurement is more than the service limit, replace the valve. • If it stays more than the service limit after you replace the valve, replace the cylinder head.

  • Page 135: Replacing Valve Guide

     SERVICING 6. Servicing 4. ENGINE 6.7 Replacing valve guide 2. Measure the valve stem O.D. with an outside micrometer. IMPORTANT Service specifica- 6.960 to 6.975 mm • Do not hit the valve guide with a hammer during Valve stem O.D. tion 0.2741 to 0.2746 in. replacement.

  • Page 136: Adjusting Valve Angle

     SERVICING 4. ENGINE 6. Servicing 6.8 Adjusting valve angle NOTE • Before you adjust the valve, check the valve stem and measure the I.D. of the valve guide section. Repair them if necessary. Tools required • Valve refacer 1. Adjust the valve with a valve refacer. 1.0 rad Intake valve 60°...

  • Page 137: Checking Free Length Of Valve Spring

     SERVICING 6. Servicing 4. ENGINE 6.10 Checking free length of valve spring Tools required • Vernier caliper 1. Measure the free length (1) of valve spring with a vernier calipers. NOTE • If the measurement is less than the service limit, replace it. Service specifi- 37.0 to 37.5 mm cation...

  • Page 138: Checking Oil Clearance Between Rocker Arm And Rocker Arm Shaft

     SERVICING 4. ENGINE 6. Servicing 6.13 Checking oil clearance between Service specifi- 0.016 to 0.045 mm Oil clearance be- rocker arm and rocker arm shaft cation 0.00063 to 0.0017 in. tween rocker arm and rocker arm 0.10 mm Tools required Service limit shaft 0.0039 in.

  • Page 139: Checking Clearance Between Outer Rotor And Pump Body

     SERVICING 6. Servicing 4. ENGINE 1. Measure tappet O.D. with outside 1. Measure the clearance between the outer rotor and micrometer. the pump body with a feeler gauge. NOTE Service specifi- 19.959 to 19.980 mm Tappet O.D. cation 0.78579 to 0.78661 in. •...

  • Page 140: Checking Oil Clearance Between Idle Gear Shaft And Idle Gear Bushing

     SERVICING 4. ENGINE 6. Servicing 2. Move the idle gear 1, 2 to the front and rear to measure the side clearance. NOTE • If the measurement is more than the service limit, replace the idle gear 1, 2 collar. Service specifi- 0.20 to 0.51 mm cation 0.0079 to 0.020 in.

  • Page 141: Checking Side Clearance Of Camshaft

     SERVICING 6. Servicing 4. ENGINE 6.21 Checking camshaft alignment Installing idle gear bushing 1. Clean a new idle gear bushing and idle gear bore, Tools required and apply engine oil to them. • V blocks 2. Press fit the new bushing with the replacing tool. •...

  • Page 142: Checking Oil Clearance Between Camshaft Journal And Crankcase Bore

     SERVICING 4. ENGINE 6. Servicing 1. Measure the height of the cam at its highest point with an outside micrometer. NOTE • If the measurement is less than the service limit, replace the camshaft. Service specifi- 28.80 mm cation 1.134 in. Intake cam height 28.75 mm Service limit 1.132 in.

  • Page 143: Checking Oil Clearance Between Piston Pin And Small End Bushing

     SERVICING 6. Servicing 4. ENGINE 1. Measure the piston pin bore I.D. in the horizontal Small end bushing Service specifi- 22.025 to 22.040 mm and vertical directions with a cylinder gauge. I.D. cation 0.86713 to 0.86771 in. NOTE • If the measurement is more than the service limit, replace the piston.

  • Page 144: Checking Connecting Rod Alignment

     SERVICING 4. ENGINE 6. Servicing NOTE NOTE Apply engine oil to the new small end bushing • If the gauge does not touch fully against the and bore. face plate, measure the space between the gauge pin and face plate. • If the measurement is more than the service limit, replace the connecting rod.
  • Page 145  SERVICING 6. Servicing 4. ENGINE 2. Measure the ring gap with a feeler gauge. D1005- 0.30 to 0.45 mm E4B/ 0.012 to 0.017 in. NOTE E4BG • If the ring gap is more than the service limit, D1105- replace the ring. E4B/ Service E4BG specifica-...

  • Page 146: Checking Clearance Between Piston Ring And Ring Groove

     SERVICING 4. ENGINE 6. Servicing D1005- E4B/ E4BG D1105- E4B/ Service lim- E4BG 1.25 mm Oil ring D1305- 0.0492 in. E4B/ E4BG V1505- E4B/ E4BG 6.30 Checking side clearance of crankshaft Tools required • Dial gauge 1. Set a dial gauge with its point on the end of the crankshaft.

  • Page 147: Checking Crankshaft Alignment

     SERVICING 6. Servicing 4. ENGINE 2. Move the crankshaft to the front and rear to measure the side clearance. NOTE • If the measurement is more than the service limit, replace the thrust bearings. • If the same dimension bearing is not applicable because of the crankshaft journal wear, replace it with an oversize one.

  • Page 148: Checking Oil Clearance Between Crankshaft Journal And Crankshaft Bearing 1

     SERVICING 4. ENGINE 6. Servicing 1. Clean the crankpin and crankpin bearing. 0.20 mm 0.40 mm Undersize 2. Put a strip of plastigauge on the center of the 0.0079 in. 0.016 in. crankpin. 2.8 to 3.2 mm radius 2.8 to 3.2 mm radius Dimension A 0.11 to 0.12 in.
  • Page 149  SERVICING 6. Servicing 4. ENGINE 1. Measure the O.D. of the crankshaft journal with an NOTE outside micrometer. • If the oil clearance is more than the service limit, replace the crankshaft bearing 1. D1005- • If the same dimension bearing is not E4B/ applicable because of the crankshaft journal E4BG...

  • Page 150: Replacing Crankshaft Bearing 1

     SERVICING 4. ENGINE 6. Servicing Engine mod- 0.2 mm 0.4 mm Undersize 0.008 in. 0.02 in. The crankshaft journal must be fine-finished to higher than Rmax = 0.8 S Holes to be de-burred and edges rounded with 1.0 to 1.5 mm (0.040 to 0.059 in.) relief. (1) Seam (A) Dimension (2) Crankshaft bearing 1...
  • Page 151  SERVICING 6. Servicing 4. ENGINE 6. Measure the width that it becomes flat with the D1005- scale to get the oil clearance. E4B/ E4BG 0.0340 to NOTE D1105- 0.0950 mm E4B/ • If the clearance more than the service limit, 0.00134 to Service E4BG replace the crankshaft bearing 2.

  • Page 152: Replacing Crankshaft Sleeve

     SERVICING 4. ENGINE 6. Servicing 6.36 Replacing crankshaft sleeve Engine mod- 0.2 mm 0.4 mm Undersize 0.008 in. 0.02 in. Tools required D1005-E4B/ • Sleeve guide E4BG • Crankshaft sleeve press fit tool D1105-E4B/ 2.3 to 2.7 mm 2.3 to 2.7 mm E4BG radius radius...

  • Page 153: Adjusting Cylinder Correction (Over Size)

     SERVICING 6. Servicing 4. ENGINE 1. Measure the cylinder bore I.D. at the 6 positions (see figure) with a cylinder gauge and find the maximum and minimum inner diameters. 2. Find the difference between the maximum and the minimum inner diameters. NOTE •...

  • Page 154: Checking Clearance Between Inner Rotor And Outer Rotor

     SERVICING 4. ENGINE 6. Servicing 2. If the cylinder wear is more than the service limit, Oversize piston Service specifi- 0.50 mm bore and hone it to the specified dimension. and piston rings cation 0.020 in. NOTE • If the maximum I.D. or the difference for the RELATED PAGE oversize cylinder is more than the service 6.37 Checking cylinder wear on page 4-70...

  • Page 155: Checking Clearance Between Rotor And Cover

     SERVICING 6. Servicing 4. ENGINE 1. Measure the clearance between the outer rotor and the pump body with a feeler gauge. NOTE • If the clearance more than the service limit, replace the oil pump rotor assembly. • If the clearance stays more than the service limit after replacing the oil pump rotor assembly, replace the gear case cover.

  • Page 156: Checking Commutator And Mica Of Starter

     SERVICING 4. ENGINE 6. Servicing 2. Check that the pinion turns freely and smoothly in the direction that it overruns. NOTE • If there damage, replace overrunning clutch assembly. [A] Electromagnetic drive type [B] Planetary gear reduction type 6.43 Checking commutator and mica of starter Tools required •...

  • Page 157: Checking Brush Wear Of Starter

     SERVICING 6. Servicing 4. ENGINE 3. Measure the commutator O.D. with an external Service specifi- 0.50 to 0.80 mm micrometer at several points. cation 0.020 to 0.031 in. Mica undercut 0.20 mm NOTE Service limit 0.0079 in. • If the minimum O.D. is less than the service limit, replace the armature assembly.

  • Page 158: Checking Brush Holder Of Starter

     SERVICING 4. ENGINE 6. Servicing 6.45 Checking brush holder of starter Tools required • Circuit tester 1. Check the continuity across the brush holder and the holder support with a circuit tester. NOTE • If electricity flows, replace the brush holder assembly. Resistance be- tween brush hold- Service specifi-...

  • Page 159: Checking Bearing Of Alternator

     SERVICING 6. Servicing 4. ENGINE 1. Check the continuity across the lead (1) and brush (2) with a resistance range of circuit tester. NOTE • If electricity is out of service specification, replace the yoke assembly. Resistance be- Service specifi- tween lead and Continuity cation brush...

  • Page 160: Checking Slip Ring Of Alternator

     SERVICING 4. ENGINE 6. Servicing 1. Measure the resistance across the slip rings with Service specifi- 14.4 mm the resistance range of circuit tester. cation 0.567 in. Slip ring O.D. 14.0 mm NOTE Service limit 0.551 in. • If electricity is out of service specification, replace the rotor.

  • Page 161: Checking Rectifier

     SERVICING 6. Servicing 4. ENGINE 6.53 Checking rectifier Tools required • Circuit tester 1. Check the continuity across each diode of rectifier with the resistance range of circuit tester. NOTE • The rectifier is correct if the diode in the rectifier conducts electricity only in one direction.
  • Page 162  SERVICING 4. ENGINE 6. Servicing 4-80 05-E4B SERIES,05-E4BG SERIES KiSC issued 03, 2023 A...
  • Page 163 INDEX Symbols camshaft journal checking oil clearance........4-60 05-E4 circlip troubleshooting............ 4-5 installing............... 2-2 05-E4BG clamp band troubleshooting............ 4-5 checking............. 3-11 replacing............ 3-19,3-20 closed breather function..............4-1 air cleaner commutator removing............4-31 checking.............4-74 air cleaner element connecting rod cleaning..............3-8 checking alignment..........4-62 replacing............
  • Page 164 cylinder head checking tension.......... 3-8,4-19 checking top clearance........4-49 checking wear..........3-9,4-20 removing............4-34 removing............4-31 cylinder head cover replacing............3-13 removing............4-31 fan drive pulley cylinder head flaw removing............4-36 checking.............4-51 flywheel cylinder head gasket removing............4-43 removing............4-34 flywheel stopper............2-33 cylinder head surface flatness fuel filter checking.............4-50...
  • Page 165 injection nozzle oil pan (for extended oil pan) adjusting.............4-25 removing............4-35 checking fuel injection pressure......3-16 oil pan (for standard oil pan) checking spraying condition.......4-23 removing............4-40 checking valve seat tightness......4-24 oil seal injection pipes replacing.............. 2-3 removing............4-32 oil strainer injection pump removing............
  • Page 166 valve guide checking clearance..........4-52 screw replacing............4-53 tightening torques..........4-16 valve guide replacing tool........2-32 tightening torques for general use..... 4-16 valve seat small end bushing adjusting.............4-54 checking oil clearance........4-61 valve seat tightness replacing............4-61 checking.............3-17 speed control plate valve spring removing............
  • Page 167 KiSC issued 03, 2023 A...
  • Page 168 : Engine Service Department Address : 64, Ishizu-Kitamachi, Sakai-Ku, Sakai-City, Osaka, 590-0823, Japan Phone : +81-72-241-1531 : +81-72-245-2928 E-mail : kbt_g.estg-pub@kubota.com Printed in Japan 2023. 03, S, EI, EI, engusa Code No. 9Y111-07846 KUBOTA Corporation 2013. 02, S, EI, EI, engusa...

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