Weifang 495 - Centrifugal Type Bypass Oil Filter

tered; the oil is forced into the maIn oil passatJe of tlle cylinder
block through the oil outlet port on ttle filter h.ea.d fronl the inner
space of the filter element~ .. A pressure regulatiIlg valve provided
for regulating the oil pressure inside the main oil passage is ,.in-
stalled ()n the side of the filter head. The protecting cap ShOllld be
removed a.lId tile lock nut shollid be loaselled before adjusting- The
, oil pressure can be increased or decreased b~l turrling ifl or out the
adjusting screw. The acljustlnent ca.Il be made only when the oil
temperature rea.ches about 80°C. The" oil pressure should be within
196-392KPa cit this t{me.
WIlen the filter element is seriollsly chocked or the 'viscosity
of the oil is too highc the amount of oil fed irlto the !nain oil pas-
sage will be reduced greatly and the relief valve ·will 0I)en, then the
oil ~lill el1ter into the main oil passage wit}10Ut beirlg filtered to en-
Stlre the engine running safely. The relief valve had been adjusted
on a special ins trument in th~ factory before its delivery, so it
sllould not l)e dismantled and adjusted under tl0rmal con(iition.
(3 ,Centrifugal ty'"pe Bypass Oil Filter
Model F L85 centrifugal by'pass oil filter which consIsts
mainly of rotor assembly, fii ter head, fil ter casing and rotor shaft,
etc. is shown in F'ig. 28.
The working principle of the centrifugal type bypass oil filter
IS : The pressurized oil fed by lubricating oil pump enters into the
inner space of the rotor through the inlet port on the filter head
and central oil passages of pressure regulating val\!e and the rotor
shaft. There are two nozzles with an orifice on the bottom of the
rotor. After flowing into the inner space of the rotor, the pressur-
ized oil is irljected out at high speed from "the two nozzles. The re-
action force of the oil jets drives the rotor to rotate at high speed.
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