Komatsu 114E-3 Series, Руководство по ремонту, Страница: 303 / 342

50 Disassembly and assembly SEN00463-01
114E-3 Series
13
34. Piston and connecting rod assembly
1) Rotate the crankshaft and bring the piston
to be removed to the bottom dead center.
2) Scrub the carbon off the top wall of the
liner with fine sandpaper.
a
Before removing the piston and con-
necting rod assembly, measure the
side clearance between the connect-
ing rod and crankshaft with tool
K .
3) Make position marks on each connecting
rod cap (1) and connecting rod (2), match-
ing them to the cylinder.
4) Remove nuts (3).
5) Lightly hit mounting bolts of connecting
rod cap (1) with a plastic hammer and
remove connecting rod cap (1) and con-
necting rod bearing as a unit.
6) Push in and remove the piston and con-
necting rod assembly with a wood bar, etc.
from the oil pan side, while supporting pis-
ton (4) on the cylinder head side.
a
Take care not to damage the inside of
the cylinder with a corner of the con-
necting rod.
a
Make a cylinder No. mark on the pis-
ton.
7) Remove the other piston and connecting
rod assemblies according to the above
procedure.
a
Take care not to damage the sliding
portions of the pistons and bearings.
q
Disassemble the piston and connecting
rod assembly according to the following
procedure.
1]
Check that there is the “counter mark”
at part (
B ) of connecting rod (2) when
the “FRONT” mark at part ( A ) of pis-
ton (4) is set up.
2] Remove snap ring (5).