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2.6 Oil Filter - Inspect
When replacing the oil filter, sample the oil (500 ml [0.13
U.S. gal]) and check for metal and other particles. If metal
or other particles are found, cut and unfold the element, and
inspect the color and shape of metal particles trapped in ele-
ment to identify the cause.
2.7 Oil Filter Alarm - Inspect
(1) Use a tester to check the alarm for insulation and conti-
nuity. If the alarm is defective, replace it with a new
one.
(2) If the filter alarm activation pressure is out of the stan-
dard, replace the alarm with a new one.
Item
Oil filter alarm
Turn on start pressure
(differential pressure)
2.8 Relief valve opening pressure - Measure
(1) Remove the taper plug (R1/8) on the upper surface of
the oil filter bracket, and set a pressure gauge.
(2) Warm-up the engine until the oil temperature reaches
70 to 90 °C [158 to 194 °F].
(3) Measure the oil pressure at idle and maximum speed
respectively.
Note: When the oil temperature is low, the oil pressure may
rise above the set pressure, but it returns to the set pres-
sure as the oil temperature rises.
Item
Relief valve opening pressure
2.9 Relief Valve - Inspect
(1) Inspect the relief valve spring for settling and damage.
If significant settling, wear, or damage is found, replace
it with a new one.
Item
Free length of relief valve spring
(2) Inspect the valve. If significant wear or sliding mal-
function is found, replace it with a new one.
Standard value
0.165 ± 0.015 MPa
{1.68 ± 0.15 kgf/cm
2
}
[24 ± 2 psi]
Standard value
0.55 MPa
{5.6 kgf/cm
2
} [80 psi]
Standard value
147 mm [5.79 in.]
Chapter 9 LUBRICATION SYSTEM
Oil Filter - Inspect
Oil Filter Alarm - Inspect
Relief valve opening pressure - Measure
Spring
Valve
Relief Valve - Inspect
9-19
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