Oil Pressure Control Valve Components And Functions; Replacing The Oil Pressure Control Valve - Yanmar 6LY3 series Service Manual

LUBRICATION
Oil Pressure Control Valve
Components and Functions
Engine oil flows from the oil cooler to the oil filter
and is directed on to the main gallery of the cylinder
block. The oil pressure is regulated by the oil
pressure control valve just before the oil enters the
main gallery.
When the pressure of the oil entering the main
gallery of the cylinder block exceeds the standard,
the pressure control valve piston opens a pressure
outlet and allows excess oil to drain back to the oil
pan.
Regulating Pressure at 3300 rpm
0.40-0.50 MPa (58-73 psi)
Replacing the Oil Pressure Control
Valve
The control valve was set at the factory, it should
not require adjustment.
If the oil pressure control valve is disassembled due
to spring trouble, install a pressure gauge on the oil
pressure sending unit mounting washer. Adjust the
pressure with adjustment shims until it is at the
specified value.
Thickness of Adjustment Shim
0.2, 0.5, 1.0 mm
(0.008, 0.02, 0.04 in.)
8-8
Figure 8-6
1 – Oil Pressure Control Valve
2 – Bracket
3 – Valve
4 – Spring
5 – Shim
6 – Seal
7 – Plug
© 2007 Yanmar Marine International
Oil Pump Components and Functions
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(2)
Figure 8-6
6LY3 Service Manual
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