Doosan DB33A, Service Manual, Page: 45 / 78

Crankshaft journal outside diameter
Use a micrometer to measure the crankshaft journal
outside diameter across points
£
and
£
at the two
points and .
41
Inside diameter
-Apply engine oil to bearing surface.
-Measure the journal bearing cap inside diameter with
an inside dial indicator.
Journal bearing cap reassembly
Refer to
"Major components disassembly"
- Crankshaft bearing cap.
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A
B
B
B
I II
Standard (mm)
75.913
¡›
75.925
(2.989 in.)
Torque (kg
ƒU
m)
24
(173.6 lb
¡⁄
ft)
Journal bearing 76
§j
nominal diameter (mm) (2.992 in)
Crankshaft journal and bearing clearance (mm)
Crankshaft run-out (mm)
1. Mount the crankshaft on a set of v-blocks.
2. Set a dial indicator to the center of the crankshaft journal
3. Gently turn the crankshaft in the normal direction of
engine rotation.
4. Read the dial indicator(TIR) as you turn the crankshaft.
Center bearing
Other bearings
Standard
0.065
¡›
0.116
(.003~.006 in)
0.025~0.076
(.001~.003 in)
Limit
0.15
(.006 in)
0.11
(.004 in)
Under size 0.25~0.50
Bearing specifications (mm) (.010~.020 in)
Standard
0.05
(.002 in)
Limit
0.40
(.016 in)