ENGINE
Inspecting the Cylinder Block and Components
12/05
6LY3 Service Manual
5-45
© 2007 Yanmar Marine International
Inspecting the Crankshaft Pins and
Bearings
• Perform a dye penetrant inspection of the
crankshaft main bearing journals and the
connecting rod pins
(Figure 5-57)
.
• Replace the crankshaft if any cracks or other
significant damage is found.
Figure 5-57
Figure 5-57
Inspecting the Crankshaft Bend and
Deflection
• Support the crankshaft on V-blocks at both ends
main bearing journals.
• Rotate the crankshaft and measure the deflection
(Figure 5-58, (1))
of the center journal with a dial
indicator
(Figure 5-59, (1))
.
Figure 5-58
Figure 5-58
1 – Deflection
2 – Bend
Figure 5-59
Figure 5-59
1 – Dial Indicator
• Compare reading with specified limit.
0005642
Crankshaft Bend Limit
1/2 the Dial Gauge Reading
0.03 mm
(0.0011 in.)
000564
3
(2)
(1)
0005644
(1)
1/2
1/2
