Takeuchi TB014 Werkstatt-Handbuch Seite 542

4. Disassembly, inspection and reassembly of engines
Point5: Crankshaft
[Disassemble]
• Remove the crankshaft. Remove each main bearing metal upper (block side) and pair it with the metal cap
side lower metal.
Carefully prevent the bearing from being damaged or finger injury when removing the crankshaft because it
is heavy.
Point 6: Piston pin and rings
[Disassemble]
• Using the piston ring replacer (see 4.1.2(1) No.10 in
Chapter 4), remove the piston rings.
• Remove the circlip and remove the piston pin by
pushing it out.
[Reassemble]
• Install each piston ring on the piston, with the
punched manufacturer's mark facing upward.
[Reassemble]
• The piston ring joints shall be staggered at by 120 °C
intervals. Do not position the top ring joint vertical to
the piston pin. The coil expander joint shall be oppo-
site to the oil ring joint.
[Reassemble]
• When installing the piston pin to the rod and piston,
the punched match mark on the big end of the con-
necting rod shall be opposite to the size mark on the
piston top.
[Reassemble]
• Install the piston in the cylinder block. The embossed
mark on the connecting rod shall be on the flywheel
side.
(R.1)
Make the punched manufacturer's
mark face upward.
Second
ring joint
Expander joint
Piston ID mark
(Flywheel side)
Cylinder size mark
Piston ID mark
Assembly direction of connecting
(
rod and piston
77
Piston ring
Oil ring joint
120
120
120
Top ring joint
Ring joints
Embossed mark
(Flywheel side)
Match mark
)