Doosan DP158LDF - Page 65

5. About the engine
98
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
wi
th 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 t
he
conn
ecting rod bearing cap(H).
13. Attach the connecting rod and piston assembly.
DV2213088A
1) Attach the connecting rod and piston assembly to the
cyl
inder 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
t
he 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 t
op
s
urface 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
connec
ting rods and the connecting rod caps.
• Ensure that the marks of the connecting r
od and
t
he bearing cap are facing the same direction.
A
B