Doosan P158LE -III, Operation & Maintenance Manual

Page: 67 / 165

Inspection - 64 -
b) Distortion at the lower face
z
Measure the amount of distortion
using a straight edge and a feeler
gauge at six positions as shown in
the right figure.
z
If the measured value exceeds the
standard value, retrace the head
with grinding paper of fine grain
size to correct such defects.
z
If the measured value exceeds the
maximum allowable limit, replace
the cylinder head.
<Lower face warp and height>
3) Inspection and measurement of valve and valve guide
a) Valve
z
After cleaning the valves with
clean diesel oil, measure the valve
stem's outside diameter at upper,
middle, and lower to determine the
wears and when the wear limit is
more than 0.15mm, replace the
valves.
Warpage
Standard Limit
0.05 mm or
less
0.2 mm
Thickness : t
(reference)
113.9 ~
114.0 mm
112.9 mm
Valve Standard Limit
Intake
11.969 ~
11.980 mm
12.130 mm
Exhaust
11.944~
11.955 mm
12.105 mm
(t)
A
B
C
D
E
EA3M2031
F
EA6M2002
EFM2036I
Stem tip