Weifang 495 - Cleaning of Lubricating Oil Filter; Cleaning of Centrifugal Type Bypass Oil Filter

bench after reassembling. The deliveriI)g capacity of- the pump
should not be less than 35 liters/min. when the pll.lnp speed is at
2350 .,rpm, the oil tern'perature is of 80
0
-
85°C and thp oil pressure
is of 294KPa.
The opening pressure of the pressure regulating valve should
be adjusted to 490- 588KPa.
Only a slight amout of oil leaked from the pump bushings is
allowed during testing.
(B)Clean.ing of Lubricating Oil Fliter
The method of cleaning the lubricating oil filter's paper ele-
ment is the same as that of the fuel filter eiemel1t.
(C)Cleaning of C.entrifugal type Bypass Oil 'Filter
a. Remove the cap nut and dismantle the filter casing.
b. Remove the riut on the thrust washer, and the washer it-
s~lf ,take out the rotor assembly from the rotor shaft.
c. Remove t11e lock nut on the rotor cover and the cover itself.
d. Scrape away the dirt deposited in the inner space of the ro-
torswid~ a wood scraper and wash thet'otors 'with diesel oil. Clean
. the nozzle orifice with a brass wire if necesst:iry, bu t don't disman-
tle the orifice plug.
e. Reassmble the rotor in the reversed sequence. The "0" ring
seal beneath the rotor ,cover, and the gasket beneath the hollow
lock nut should be checked whetl'ler they are in good conditi9n 9r
not. The hollow lock nut should not be over tightened to prevent
the rotor cover from damage.
f. After being installed onto the rotor shaft, the ,rotor assem-
bly should be able to be rotated freely by hand ,and then put on the
thrust washer and tighten the nut. The rotor's end play should be
within 0.3-0.7 mm.
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