Doosan DP222LBF - Page 98

5. About the engine
92
12. Attach the piston to the connecting rod.
DV2213177A
1) Install the 1st ring(D), 2nd ring(E), and the oil ring(F) with
the piston ring plier(T7621010E).
2) Apply engine oil on the piston pin(C).
3) Align the pin hole of the connecing rod(G) small-end with
that of the piston(A).
4) Attach the piston pin(C).
5) Attach 2 snap rings(B) with the snap ring plier
(T7610001E).
6) Align the upper bearing groove with connencting rod.
Attacht the upper connecting rod bearing(I) to the
connecting rod(G).
7) Align the lower bearing groove with connecting rod.
Attach the lower connecting rod bearing(J) to the
connecting rod bearing cap(H).
13. Attach the connecting rod and piston assembly.
DV2213088A
1) Attach the connecting rod and piston assembly to the
cylinder block.
2) Attach the connecting rod cap(B).
3) Tighten 2 M16X1 flange hex bolts(A) at a tightening
torque 10 kgf·m + 90° by using the angle method.
CAUTION
• Ensure that the ‘Y’ mark of the piston ring faces the
top surface of the piston.
• Make the piston ring position dislocated to 120°
CAUTION
• The intake valve pocket is larger than the exhaust
valve pocket.
• Attach the engine as the same piston weight. Place
the Class of the piston weight on the top surface of
the piston.
CLASS Piston Weight(g)
A 2,371 ~ 2,380
B 2,381 ~ 2,390
C 2,391 ~ 2,400
D 2,401 ~ 2,410
E 2,411 ~ 2,420
J
I
D
E
B
A
F
B
C
H
G
CAUTION
Check the attached piston and piston ring. If the piston
should be replaced, replace the piston pin along with
the piston.
CAUTION
• Do not reuse the snap rings.
• Assemble snap rings with the opening of the snap
rings facing 12 o’clock.
CAUTION
• Be careful the direction when assembling the
connecting rods and the connecting rod caps.
• Ensure that the marks of the connecting rod and the
bearing cap are facing the same direction.
A
B