Doosan DE12T - Cam Lobe Height; Cam Shaft; Cam Surface

9.2.5. Cam shaft
1) Cam
•
Cam lobe height
Use a micrometer to measure the cam
journal diameter.
If the measured number is less than the
specified limit, the camshaft must
replaced.
•
Cam surface
Inspect the cam face for scratch or dam-
age.
Slight step wear or damage on the cam
face may be corrected with oil stone or
oiled grinding paper. But, replace if
severely damaged.
2) 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 deter-
mine the clearance.
<Clearance>
Replace the bushing if the measured
value is beyond the specified limit.
- 81 -
C
A
A
BB
D
III
III
EA0M4062
EA0M4063
Camshaft bearing
Standard Limit
Cam journal diameter(A,B) 59.86 ~ 59.88 mm 59.52 mm
Standard Limit
0.050 ~ 0.128 mm 0.2 mm