Doosan GL08K - Page 76

Maintenance - 70 -
 Cam surface
Inspect the cam face for scratch or damage.
Slight step wear or damage on the cam face may be corrected with oil stone or oiled grinding paper.
But, replace if severely damaged.
3) Cam shaft
 Clearance
between camshaft journal and camshaft bush
With an outside micrometer, measure
the camshaft journal diameter.
Measure the inside diameter of the
camshaft bushing on the cylinder
block using a cylinder bore indicator,
and compare the measured value
with the camshaft outside diameter to
determine the clearance.
<Clearance>
Replace the bushing if the measured value is beyond the specified limit.
 Run-out
Support the camshaft on two V blocks
and check for run-out using a dial
indicator.
Correct or replace the cam shaft if the
amount of run-out is beyond the
value indicating need for servicing.
3.2.7. Crankshaft
1) Inspection of crankshaft
a) Defect check
 By naked eyes, check for any scratch or damage on the crankshaft journal and crank pin.
 By means of magnetic particle test and color check, check the crankshaft for any crack and if
found, replace it.
EA0M4063
Camshaft bearing
Standard Limit
0.06
~ 0.115 mm 0.23 mm
EA0M4066
Standard Limit
0.05 mm 0.15 mm