Doosan DV11 - Page 100

DV11
Operation and Maintenance
97
Engine Reassembly
Printed in Mar. 2005 PS-MMA0608-E1A
z Coat the pistons and connecting
rod bearings sufficiently with clean
engine oil.
z By means of a special tool, insert
the piston rings and adjust the
angles between the ring gaps at
120°.
z Identify the mark "Y" or "TOP" on
the ring end to prevent the top and
bottom of the piston ring from
being interchanged and make the
marked portion face upward.
(The surface marked as “Y” or
“TOP” is upper surface.)
z Push in the piston with hands or
wooden bar into cylinder. (Be
careful for piston and rings not be
damaged.
z Pushing the piston down, rotate the
crankshaft about 180° and fit the
bearing cap to the connecting rod.
z Coat the tap parts of connecting
rod bolts and their seats with
engine oil, and after engaging 2～
3 threads of bolts primarily rind
then tighten them to the specified
torque. (10 kg.m + 90°
+10°
)
“Y” or “TOP”
Top ring
2nd ring
Oil ring
CAUTION:
Direction of snap ring is
assembling to be positioned the
opposite side