TOHATSU BFT75A Service Manual page 424

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CRANKSHAFT RUNOUT
Install the No.1 upper main bearing [1] and the No.5
upper main bearing [2] on the cylinder block [3].
Install the crankshaft [4] on the cylinder block.
Set the dial indicator [5] on the crankshaft as shown.
Measure
crankshaft.
STANDARD:
SERVICE LIMIT:
If the measurement exceeds the service limit, replace
the crankshaft with a new one.
CRANKSHAFT MAIN BEARING OIL
CLEARANCE
Clean the crankshaft main journals and main bearings,
and check the journals and the bearings for wear or
damage.
Install the five upper main bearings and crankshaft on
the cylinder block, and install the five lower main
bearings on the crankcase.
Install the crankcase on the cylinder block, and tighten
the bolts to the specified torque (page 15-13).
Remove the crankcase, and set the plastigauge [1] on
each main journal of the crankshaft as shown.
• Set the plastigauge in the axial direction
• Avoid the oil passage in the bearing journal to set
the plastigauge.
Reinstall the crankcase on the cylinder block and
tighten the bolts to the specified torque (page 15-13).
• Do not turn the crankshaft during this check.
the crankshaft runout
0.03 mm (0.001 in) max.
0.04 mm (0.002 in)
[4]
by turning the
[2]
[3]
[1]
CYLINDER BLOCK
[1]
[5]
15-23