Jacobsen SXG323, Руководство по обслуживанию

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SERVICE MANUAL FOR SXG323&326
54
Fig. 4-67
f. If the oil clearance of a journal is in excess of
the usable limit, replace the bearings with new
ones and check for oil clearance again. When the
clearance exceeds the usable limit ever after new
bearings have been installed, polish the journal
and use undersize bearings.
When the ground-down limit of 1.0 mm (0.039
in.) is not enough for correction, replace both
crankshaft and bearings with new ones.
• Check the pins on the crankshaft for oil clear-
ance.
a. Clean the crankshaft pins, connecting-rod big
ends, and bearings.
b. Place plasti-gauge over the pin width.
Fig. 4-68
c. Tighten the bearings on the connecting rods to
the specified torque.
Fig. 4-69
Note:
Hold the crankshaft securely so as not to turn
while tightening.
d. Loosen the tightening bolts and remove the con-
necting-roil bearing caps carefully.
e. Measure the most stretched parts of the plasti-
gauges.
Fig. 4-70
f. If the oil clearance exceeds the usable limit, re-
place the bearings with new ones and check for
Standard value Usable limit
0.029 - 0.090 mm 0.12 mm
Undersize bearings 0.5, 1.0 mm
Specified torque
2.7 - 3.3 kgf
･
m
Standard value Usable limit
0.025 - 0.072 mm 0.12 mm