Takeuchi TB 175 Handbuch Seite 782

4. Disassembly, inspection and reassembly of engines
Step
1)Remove main bearing cap bolt. While shaking
main bearing cap, remove main bearing cap
together with lower main bearing metal.
2)Extract crankshaft, taking care not to damage it.
3)Remove upper main bearing metal.
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1)Remove piston and connecting rod assembly.
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2)Remove tappet.
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Removal Parts
1)Before extracting crankshaft, measure the side
gap around it.
Crankshaft
Apply a dial gauge to the end of crankshaft.
Force the crankshaft on both sides in the axial
direction to measure the thrust gap.
Alternatively, insert a thickness gauge directly
between the base thrust metal and the thrust
surface of the crankshaft to measure the gap.
If the limit size is exceeded, replace the thrust
metal with a new one.
Thrust gap (All models)
2)Notice on the removal of thrust metal.
a)When removing thrust metal, ascertain the
position and direction where thrust metal is
installed in relation to the cap.
b)Make sure that the thrust metal groove is
outward in relation to the cap.
1)To selectively remove a desired piston and con-
necting rod assembly without extracting crank-
shaft, take the steps itemized below:
a)Remove carbon deposits from the upper wall of
the cylinder using fine sandpaper, taking care
not to damage the inner surface of the cylinder.
b)While turning the crankshaft, with the
connecting rod cap removed, raise the piston up
to the top dead center (TDC).
c)Extract the piston/connecting rod assembly
while tapping the connecting rod at the large end
with the handle of a plastic hammer or the like.
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Remarks
Dial gauge