Yanmar EF-494T - Lubricating Oil Filter (lo Filter); Oil Pressure Switch

3 ENGINE 3 ENGINE
EF494T TM 06/2011 edition
92
3.3.3 Lubricating oil filter (LO filter)
Has a built-in bypass valve in case of blockage.
The vale will be activated at a differential
pressure of 1.0 0.2 kgf/cm
2
across the paper
filter element and enable the oil to flow through
the bypass circuit.
(A) Oil filter
(a) Rubber packing
(b) Bypass valve (safety valve)
Activation pressure: 0.6 kgf/cm2 (Low idling
RPM)
(c) Lubricating oil pump
(d) Lubricating oil
(e) Paper filter element
(f) Normal flow path
(g) Bypass flow path
3.3.4 Oil pressure switch
Closes to provide an alarm (illuminate an alarm
LED on the combination meter) when the
lubricating oil pressure decreases to a certain
limit.
(A) Oil pressure switch