Differential Bypass Valve - Mitsubishi 4DQ50 Service Manual

-
3-2 Oil filter
Oil filter is of the filter paper full-flow type.
1) Every 250Hr run, change oil. On the same occasion, unfasten filter case and
replace element with new one. If bypass alarm lamp has got alight with the
engine hot, replace element as soon as possible, without sticking to the
standard intervals.
2) At the same time to replace element, wash the interior of filter case in gas oil
(or cleaning oil). In assembling again, don't forget to place spring and spring
seat where they were.
3) Carefully examine used element and oil and if many metallic, particularly
copper-color settlings found, which is an evidence of bearing metals being
abnormally worm, take appropriate measures at once.
Center bolt
Spring
Differential alarm terminal
Element
Fig. 3-12 Oil filter
3-3 Differential bypass valve
This valve is set in oil filter cover. The design i~ such that an oil pressure difference
above 1.5kg/cm
2
between inlet and outlet sides of filter element arisen from its being
choked with dirt makes it open to bypass unfiltered oil directly into main oil· gallery in
- 20-