Yanmar 6LY3 series Service Manual

ENGINE
Inspecting the Cylinder Block and Components
5-48 6LY3 Service Manual
© 2007 Yanmar Marine International
Inspecting the Camshaft and Tappets
The camshaft (Figure 5-64, (1)) is normalized. The
cam lobes and bearing surfaces are surface
hardened and ground with a curve that minimizes
the repeated shocks on the valve seats and
maximizes valve seat life.
Figure 5-64
Figure 5-64
1–Camshaft
2–Push Rod
3–Tappet
4 – Camshaft Bearing
5 – Thrust Bearing
6–Camshaft Gear
Inspecting the Camshaft Side Clearance
NOTICE: Measure the thrust clearance before
disassembling.
The cam gear (Figure 5-65, (1)) and camshaft are
assembled using a shrink-fit. Use caution when
replacing the cam thrust bearing.
Figure 5-65
Figure 5-65
1–Cam Gear
2 – Thrust Metal
3 – Side Clearance
• Measure the height of each cam lobe as shown in
Figure 5-66.
Figure 5-66
Figure 5-66
• Replace the cam if any lobes are worn beyond
the stated limit.
Camshaft Side Clearance
Standard Limit
0.05-0.20 mm
(0.0019-0.0078 in.)
0.29 mm
(0.0114 in.)
0005649
(1)
(2)
(3)
(4)
(6)
(5)
0005650
(1)
(2)
(3)
0005651

Yanmar 6LY3 series Specifications

General

Brand	Yanmar
Model	6LY3 series
Category	Engine
Language	English