Shibaura CM284 - Page 77

76
Part Inspection Items
Standard
Dimension
Standard
Assembling
Va l ue
Repair
Va lu e
Service
Limit
Remarks
Connecting rod
Torsion of large end and small end holes
(per 100 mm)
Less than
0.08
More than
0.2
Parallelism of large end and small end holes
(per 100 mm)
Less than
0.05
More than
0.15
Longitudinal play of connecting rod and crank pin 0.1
–
0.3 0.7
Clearance between connecting rod bearing and crank
pin
0.035 –
0.083
0.2
Oil
clearance
Connecting rod bearing (bore x width)
φ44×19.8
Connecting rod tightening torque N⋅m {kgf
⋅
m}
49.0 – 53.9
{5.0–5.5}
Weight variation of piston after assembly (g) Less than 10
Crank shaft
Journal dia.
φ58
φ57.957 –
57.97
φ57.90
Crank pin dia.
φ44
φ43.964 –
43.975
φ43.90
Journal and pin finishing accuracy 1.6Z
Run-out of crankshaft
Less than
0.03
0.06
Axial play of crankshaft 0.1
–
0.4 0.5
Thrust washer thickness 3 2.95 – 3.00 2.8
Bush (journal metal) bore × outside dia.
φ58×φ62
Clearance between crank journal and bush (journal
metal)
0.044 –
0.116
0.2
Oil
clearance
Center bearing (bore × outside dia.)
φ58×φ62
Clearance between crank journal and center bearing
0.044 –
0.116
0.2
Oil
clearance
Bearing holder (upper and lower) tightening torque
N⋅m {kgf⋅m}
49 – 53.9
{5.0 – 5.5}
Camshaft
138X
For intake and
exhaust valves
34.441 –
34.5076
34.1
For injection
pump
42.99 –
43.01
42.8
Cam shaft runt 0.03 0.1
Cam gear backlash 0.08 0.25
Valve
Intake valve stem 6.97 6.955 – 6.97 6.89
Exhaust valve stem 6.95 6.94 – 6.95 6.84
Clearance between valve stem and valve
guide
Intake 0.03 – 0.06 0.2
at cold
Exhaust
0.045 –
0.075
0.25
139X
1.0
0.775 –
1.075
0.5