Yanmar L48V [24/24] Cylinder head

Содержание

• Engine 1
• Section 6 1
• Wm lft 2
• Before you begin servicing 3
• Caution 3
• Warnin 3
• _______ 3
• Caution 4
• Engine 4
• Introduction 4
• This section of the service manual describes the disassembly inspection and reassembly of the engine 4
• As undersize bearings are available and may have been installed some time during the life of the engine add the oversize or subtract the undersize from the standard dimension to measure these replacement parts refer to the parts catalog for the available sizes 5
• Cylinder head 5
• Cylinder head assembly 5
• Engine 5
• Intake exhaust valve seat 5
• Note all dimensions given are for standard original components oversize pistons and piston rings as well 5
• Specifications 5
• Valve clearance 5
• Yanmar 5
• Engine 6
• Intake exhaust valves guides and seals 6
• Push rod 6
• Engine 7
• Rocker arm and shaft 7
• Valve spring 7
• Yanmml 7
• Crankshaft 8
• Crankshaft balancer shaft piston and connecting rod 8
• Engine 8
• Balancer shaft 9
• Engine 9
• Engine 10
• Piston 10
• Yanmar 10
• Engine 11
• Piston ring 11
• Engine 12
• Connecting rod 13
• Engine 13
• Camshaft 14
• Camshaft and tappet 14
• Engine 14
• Tappet 14
• Cylinder block 15
• Cylinder block and crankcase cover 15
• Engine 15
• Crankcase cover 16
• Engine 16
• Yanmar 16
• Engine 17
• Oil pump trochoid pump 17
• Yanmml 17
• Engine 18
• Special torque specifications 18
• Engine 19
• Engine 20
• Special service tools 20
• Yanmar 20
• Engine 21
• Special service tools continued 21
• Engine 22
• Measuring instruments 22
• Yanmar 22
• Engine 23
• Measuring instruments continued 23
• Cylinder head 24
• Engine 24
• Removal of cylinder head 24

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ENGINE CYLINDER HEAD Note Mark the push rods so they can be reinstalled in their original locations Removal of Cylinder Head 4 Remove the push rods L48V Models Note When loosening or tightening the highpressure fuel line nuts use a line or flare nut wrench to prevent rounding of the nuts 1 Remove the air cleaner assembly 2 Remove the fuel tank and fuel tank support brackets 3 Remove the muffler assembly L70V and L100V Models 1 Remove the cylinder head upper cooling cover 2 Remove the cylinder head side cooling cover 1 Remove the air cleaner assembly 2 Remove the fuel tank and fuel tank support brackets 5 Remove the high pressure fuel injection line fuel return line and the fuel injector See Removal of Fuel Injector on page 7 21 6 Remove the two cylinder head nuts and two bolts and remove the cylinder head Figure 6 3 Discard the cylinder head gasket Place the cylinder head on a protected work surface to prevent damage to the combustion surface 3 Remove the muffler assembly All Models 1 Disconnect the external compression release linkage if equipped from the rocker arm cover 2 Remove the rocker arm valve cover 3 Remove the rocker arm shaft assembly Figure 6 2 by first removing the two bolts that secure the rocker arm shaft assembly to the cylinder head iI 0001828 Figure 6 3 x v X X 0001825 Figure 6 2 6 24 LV Service Manual WlfOAB