Timer Components And Functions - Yanmar 6LY3 series Service Manual

Fuel Injection Pump / Governor / Timer
12/05

Timer Components and Functions

Timer Components
The 6LY3 series engine utilizes an electro-hydraulic
timer. The timer consists of a piston, a cylinder and
a cam drive coupling. The piston has helical spline
outside and straight spline inside, as illustrated in
Figure 6-6. The cylinder (Figure 6-6, (6)) has
helical splines inside and oil passages to move the
piston. The cam drive coupling (Figure 6-6, (9))
has a straight spline outside and drives the pump
camshaft.
Figure 6-6
(9)
(8)
1 – Electromagnetic Valve
2 – Helical Spline
3 – Piston
4 – Straight Spline
5 – Cam Tightening Nut
6LY3 Service Manual
Figure 6-5
(1)
Figure 6-6
6 – Cylinder
7 – Pump Drive Gear
8 – Pump Camshaft
9 – Cam Drive Coupling
© 2007 Yanmar Marine International
Figure 6-5
(2)
(3)
(4)
(5)
(7) (6)
0005669
FUEL SYSTEM
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6-11