Doosan AD158TI, Operation & Maintenance Manual

Page: 92 / 294

Disassembly and assembly of major components - 86 -
6.2.6. Crankshaft
(1) Inspection and measurement
●
Inspect for any scratch or damage with
naked eyes, and grind to the undersize
according to the damaged degree and
use the undersized bearing.
●
Inspect for any crack by means of mag-
netic powder and color check, and
replace the cracked ones.
a) Journal and pin diameter
●
With outside micrometer, measure
the outside diameter of crank journal
and crank pin at the direction and
position of the figure shown and take
the wear.
<Crankshaft journal outside diameter>
<Crankshaft pin outside diameter>
●
In case that the lopsided wear is
more than the limit value, grind to the
undersize, and use the undersized
bearing.
<kinds of bearings for undersize>
(a) Standard
(b) 0.10 (Inside diameter 0.10 mm less than standard)
(c) 0.25 (Inside diameter 0.25 mm less than standard)
(d) 0.50 (Inside diameter 0.50 mm less than standard)
(e) 0.75 (Inside diameter 0.75 mm less than standard)
(f) 1.00 (Inside diameter 1.00 mm less than standard)
A
A
B B
EA3M2050
Standard
ø103.98 ~ ø104.00 mm
1
1
2
EA0M4017
2
3 4
3 4
Standard
ø98.98 ~ ø90.00 mm