Mitsubishi Heavy Industries SL Series Service Manual page 29

Inspection point
Valve seat angle
Valve sinkage
Valve seat Valve head width
and valve
Valve margin
Valve guide mounting length
Free length
Squareness
Valve
spring
Rest length / load
Pushrod Runout
Cylinder
Distortion of cylinder head bottom surface
head
Distortion of block top surface
Cylinder
Inside diameter
Cylindericity
Outside diameter
Piston Weight difference in one engine
Piston pin outside diameter
Clearance between piston pin bore and pis-
ton pin
Clearance between piston and cylinder
(clearance)
Table 2-2 Maintenance service data table - Basic engine (2 / 3)
Nominal
45°
0
[0.00]
1.6
[0.063]
1.5
[0.059]
10
[0.39]
ø 78
[3.073]
78.00
STD
[3.0709]
78.25
0.25 OS
[3.0807]
78.50
0.50 OS
[3.0905]
ø 23
[0.91]
Standard
0.25 to 0.75
[0.0098 to 0.0295]
1.30 to 1.80
[0.0512 to 0.0709]
1.35 to 1.65
[0.0531 to 0.0650]
9.5 to 10.5
[0.374 to 0.413]
47 [1.85]
θ = 2.0°
Δ = 0.2 [0.0079] or less
Lf = 47 [1.85]
39.0 [1.535]/ 30.1 [1.185]/
131 to 145 N 279 to 309 N
{13.3 to 14.7 kgf} {28.5 to 31.5 kgf}
{29 to 32 lbf} [63 to 69 lbf]
0.3 [0.012] or less
0.05 [0.0020] or less
0.05 [0.0020] or less
+0.060
ø 78
+0.030
+0.0024
[3.07 ]
+0.0012
±0.01 [0.0004] or less
77.93 to 77.95
[3.0681 to 3.0689]
78.18 to 78.20
[3.0779 to 3.0787]
78.43 to 78.45
[3.0878 to 3.0886]
±5 g [0.18 oz.] or less
22.994 to 23.000
[0.9053 to 0.9055]
0.006 to 0.018
[0.0002 to 0.0007]
0.035 to 0.086
[0.0014 to 0.0034]
SERVICE DATA
Unit: mm [in.]
Limit Remark
Seat width
1.50
[0.0591]
2.50
[0.0984]
Valve
Valve
margin
Valve sinkage
0.50
seat angle
[0.0197]
46
[1.81]
Δ = 0.5
[0.020]
over
Lf
entire
length
-15%
Replace
0.10
Repair
[0.0039]
0.10
Repair
[0.0039]
78.2 Repair to oversize or
[3.079] replace
77.80
[3.0630]
78.05
[3.0728]
78.30
[3.0827]
0.050
[0.0020]
0.300 Repair to oversize or
[0.0120] replace
2-3