Shibaura ST330, Workshop Manual

Page: 69 / 250

65
Unit Part Inspection Items
Standard
Dimension
Standard
Value
To be
Repaired
Allowable
Limit
Remarks
Twist between small and large end holes (per
100 mm) Less than
0.08
More than
0.2
Straightness at 100 mm between small and
large end hole Less than
0.05
More than
0.15
Front-to-rear clearance between connecting
rod and crank pin
0.1 – 0.3 0.7
Connecting rod metal-to-crank pin clearance 0.035 –
0.085
0.2
Oil
clearance
Connecting rod tightening torque
N
⋅
m {kgf
⋅
m}
49.0
―
54.0
{5.0 – 5.5}
Weight difference with piston
(g)
Less than 10
Diameter of journal
∅
68
∅
67.957
－
67.970
∅
67.9
Diameter of crank pin
∅
52
∅
51.964 －
51.975
∅
51.9
Roughness, main journal and crank pin 1.6Z
Crankshaft deflection Less than
0.03
More than
0.06
Axial play of crankshaft
0.1 － 0.4
0.5
Thickness of thrust washer
3.0
2.95 － 3.00
2.8
O.D.
×
I.D. of bush (journal metal)
∅
68 × 72
Clearance between crankshaft and journal
metal (bush)
0.044– 0.116 0.2
Oil
clearance
I.D.
×
O.D. of center bearing
∅
68
×
72
Clearance between crankshaft journal and
center bearing 0.044 –
0.102
0.2
185Y
For
intake/exhaust 34.441 –
34.5076
34.1
For injection
pump
42.99 –
43.01 42.8
Cam shaft run out
Less than
0.03
More than
0.1
Cam gear backlash 0.08 0.25
Diameter of intake valve stem 6.97 6.955 – 6.97 6.89
Diameter of exhaust valve stem 6.95 6.94 – 6.955 6.84
Clearance between valve stem and
valve guide
Inlet 0.03 – 0.06
More than
0.2
Exhaust 0.05 – 0.075
More than
0.25
186Y
1.0
0.775 –
1.075
0.5
VAL
VE
CONN
EC
TIN
G
R
O
D
CRA
N
K
SHAF
T
CA
MSHA
FT
MA
IN MOVI
N
G
S
Y
ST
EM
VA
LV
E SYS
T
E
M