Doosan AD158TI, Operation & Maintenance Manual

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Disassembly and assembly of major components - 100 -
●
Pushing the piston down, rotate the crank-
shaft about 180
° and fit the bearing cap to
the connecting rod.
●
After engaging 2 - 3 threads of bolts primar-
ily rind then tighten them.
<Connecting rod bolt tightening order>
(1) First step : Engage 2 - 3 threads by hands.
(2) Second step : Tighten to about 7 kg.m with wrench.
(3) Third step : By means of torque wrench tighten to 10 kg.m.
(4) Fourth step : Finally assemble by means of rotation angle method 90°+10°.
However, according to above tightening order, tighten them step by step.
* Standard length of bolt and use limit:
(from head seat to bolt tip)
●
By moving the connecting rod bearing cap
by hands, make sure if there is any play in
left and right.
●
With same ways as above, assemble in
each cylinder rotating the crankshaft.
6.3.15. Front oil seal holder
●
After placing the oil seal in the oil holder
hole properly, press it in with a mandrel. (Be
careful for oil seal not be damaged.)
●
Attach the gasket at oil seal holder.
●
Align the dowel pin with the oil seal holder
dowel hole and assemble them by tapping
lightly the dowel pin part with an urethane
hammer.
EA6M2006
Top ring
2nd ring
Oil ring
Standard length Use limit
67.5 -
0.3
mm 69 mm
EFM2070I
EFM2073I