Kubota WSM BT603 Скачать руководство пользователя страница 7

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4.3 Function of fuel feed pump..............................................................................................................3-12
4.4 Function of injection nozzle.............................................................................................................3-12

SERVICING .....................................................................................................................................................3-15

1. Troubleshooting for engine .....................................................................................................................3-15
2. Servicing specifications for engine .........................................................................................................3-19
3. Tightening torques for engine .................................................................................................................3-23
4. Checking and adjusting ..........................................................................................................................3-24

4.1 Engine body ....................................................................................................................................3-24

4.1.1 Checking compression pressure ............................................................................................3-24
4.1.2 Checking valve clearance.......................................................................................................3-24

4.2 Lubricating system ..........................................................................................................................3-25

4.2.1 Checking engine oil pressure .................................................................................................3-25

4.3 Cooling system................................................................................................................................3-26

4.3.1 Checking fan belt tension .......................................................................................................3-26
4.3.2 Checking fan belt damage and wear ......................................................................................3-26
4.3.3 Checking radiator cap air leakage ..........................................................................................3-26
4.3.4 Checking radiator water leakage ............................................................................................3-27
4.3.5 Checking thermostat valve opening temperature ...................................................................3-27

4.4 Fuel system.....................................................................................................................................3-28

4.4.1 Checking injection timing ........................................................................................................3-28
4.4.2 Checking fuel tightness of pump element...............................................................................3-29
4.4.3 Checking fuel tightness of delivery valve................................................................................3-29
4.4.4 Checking nozzle spraying condition .......................................................................................3-29
4.4.5 Checking fuel injection pressure.............................................................................................3-30
4.4.6 Checking valve seat tightness ................................................................................................3-30
4.4.7 Checking nozzle holder ..........................................................................................................3-31

5. Disassembling and assembling ..............................................................................................................3-31

5.1 Separating engine ...........................................................................................................................3-31

5.1.1 Draining engine oil ..................................................................................................................3-31
5.1.2 Removing battery....................................................................................................................3-32
5.1.3 Removing bonnet....................................................................................................................3-33
5.1.4 Disconnecting wiring harness and ground cables ..................................................................3-33
5.1.5 Disconnecting fuel hoses........................................................................................................3-34
5.1.6 Disconnecting accelerator wire...............................................................................................3-34
5.1.7 Disconnecting propeller shaft assembly .................................................................................3-35
5.1.8 Separating engine...................................................................................................................3-35
5.1.9 Draining coolant and removing outer engine parts .................................................................3-36

5.2 Disassembling the engine ...............................................................................................................3-36

5.2.1 Cylinder head and valve .........................................................................................................3-36
5.2.2 Gear case and timing gears....................................................................................................3-40
5.2.3 Piston and connecting rod ......................................................................................................3-44
5.2.4 Flywheel and crankshaft .........................................................................................................3-46

6. Servicing.................................................................................................................................................3-48

6.1 Cylinder head and valve..................................................................................................................3-48

6.1.1 Checking top clearance ..........................................................................................................3-48
6.1.2 Checking cylinder head surface flatness ................................................................................3-48
6.1.3 Checking cylinder head flaw ...................................................................................................3-49
6.1.4 Checking valve recessing .......................................................................................................3-49
6.1.5 Checking clearance between valve stem and valve guide ..................................................... 3-49
6.1.6 Replacing valve guide.............................................................................................................3-50
6.1.7 Checking valve seating...........................................................................................................3-51
6.1.8 Correcting valve......................................................................................................................3-51
6.1.9 Correcting valve seat ..............................................................................................................3-51
6.1.10 Lapping valve........................................................................................................................3-52
6.1.11 Checking free length and tilt of valve spring .........................................................................3-52
6.1.12 Checking valve spring setting load .......................................................................................3-52
6.1.13 Checking oil clearance between rocker arm and rocker arm shaft....................................... 3-53
6.1.14 Checking push rod alignment ...............................................................................................3-53