Doosan P158LE -III, Operation & Maintenance Manual, Page: 86 / 165

Engine Reassembly - 83 -
z
Assemble temporarily one bolt each at
both bolt' holes and by connecting the
wire to the bolts, lift it with crane or chain
block and put down on the cylinder block
carefully.
z
Coat the crankshaft journal and pin parts
with clean engine oil, and after fitting the
main bearing into the bearing cap and
assemble it to the cylinder block making
sure of the number in order not to
change the bearing cap.
z
Coat the bearing cap bolt and its bolt
seat part with engine oil necessarily and
according to the tightening order, tighten
them with 30 kg
⋅
m and with rotating
angle method (90° +10° ) and tightening
order is as follows.
<Bearing cap bolt’s Tightening Order>
(1) First step : Coat the bolts with engine oil.
(2) Second step : Screw down 1 ~ 2 threads.
(3) Third step : Tighten with about 15 kg
⋅
m by wrench.
(4) Fourth step : Tighten with about 25 kg
⋅
m by torque wrench.
(5) Fifth step : Tighten with 30 kg
⋅
m by torque wrench.
(6) Sixth step : Tighten with final rotating angle method 90°
+10°
.
However, according to above tightening order, tighten step by step.
z
Inspect if the crankshaft’s rotation is smooth.
z Assemble the crankshaft gear on the crankshaft and coat a white paint mark on “1” part in order to
find easily.
6 4 2 1 3 5 7
EFM2061I
EFM2062I