Shibaura N843 - Page 71

109823 2/09 7-3
Rotating Assembly
Crankshaft
Diameter of journal 1.890(48) 2.677(68) 1.8883–1.88888
(47.964–47.975)
2.6755–2.6760
(67.957–67.970)
1.8858
(47.9)
2.6535
(67.4)
Diameter of crank pin 1.614(41) 2.0472(52) 1.6128–1.3132
(40.964–40.975)
2.0458–2.0463
(51.964–51.975)
Ø1.6102
(40.9)
2.024
(51.4)
Roughness, main journal and
crank pin
1.6Z 1.6Z
Crankshaft run out Less than
0.0012(0.03)
Less than
0.0012(0.03)
More than
0.0024(0.06)
Axial play of crankshaft 0.0039–0.0118
(0.1–0.3)
0.0039–0.0118
(0.1–0.3)
0.0197
(0.5)
0.0197
(0.5)
Thickness of thrust washer 0.118(3.0) 0.116–0.118
(2.95–3.00)
0.110
(2.8)
O.D. X. I.D. of journal bearing 2.008 x 1.890
(51 x 48)
2.677 x 2.835
(68 × 72)
Clearance between crank-
shaft journal and bearing
0.0015–0.0042
(0.039–0.106)
0.0015–0.0042
(0.039–0.106)
0.008
(0.2)
0.008
(0.2)
Oil clearance
I.D. X O.D. of center bearing 1.890 x 2.047
(48 x 52)
2.677 x 2.835
(68 x 72)
Clearance between crank-
shaft journal and center bear-
ing
0.0015–0.0036
(0.039–0.092)
0.0017–0.0040
(0.044 - 0.102)
0.008
(0.2)
0.008
(0.2)
Valve System
Camshaft
For intake/
exhaust
1.0459–1.0480
(26.565–26.62)
1.3564–1.3586
(34.453–34.508)
1.0315
(26.2)
1.3425
(34.1)
For injec-
tion pump
1.5701–1.5764
(39.88 - 40.04)
1.691–1.695
(42.94–43.06)
1.563
(39.7)
1.685
(42.8)
Cam shaft run out Less than
0.0012(0.03)
Less than
0.0012(0.03)
More than
0.004(0.1)
More than
0.004(0.1)
Cam gear back-
lash
0.0031(0.08) 0.0031(0.08) 0.010
(0.25)
Unit Part Inspection Items
Standard Dimension Standard Value
To be
Repaired
Allowable Limit
S773L N843(L) S773L N843(L) S773L N843(L) Remarks