Weifang 495 - Maintenance of Lubricating System

cause of too low inlet oil pressure ,a pressure regulating valve is in-
stalled in the oil inlet passage of the filter head. "Then the oil pres-
sure is too 10\\1 to operate the rotor normally, the pressure regulat-
. ing valve ~huts ,down and the rotor will stop to work. The pressure
regulating valve had been adjusted in the factory before its delivery
to .its opening pressure of 196±49KPa.
2). Maintenance of Lubricating System
In order to ensure the service life of all moving parts of the
engine, it is important to maintain the lubricatil1g system con-
sciously.
(} )Notice on Maintenance
A. Only the stipulated 111 bricating oil IS allowed to be used
(refer to chapter 5 of this marlual).
B. The lubricating oil should he sto~~ed in a clean and fully en-
closed contairler and filled into the engine with a clean vessel. It is
best to filter the oil with a piece of silk cloth jlJst before filling it
into the oil sump.
C. F" .)llowthe procedure of mC'..intenance strictly in maintaining
the lubricating system regularly. Special 8,:tentian should be paid
to replenish or renew' the oil ClS ~Nell as to clean the sUgiP strainer
and replace the' oil filter elementreg:llarly.
D. During the engine operating .. the oil pressure in its main oil
passage should be kept within 196- 392KPa. V/hen a cold engine is
just started ~its oil pressure· should not be higher than 490KPa.
The oil pressure should-not b~ lowe! than 49KPa during the engine
running at idling speed. If the oil press1Jre is too low, the pressure
r~~gulating, v'alve on the filter should be adjusted first and if this ad-
justment is vain, the compO:ler-ts of the lu-t)ricating system should
be inspected ont after anothe! as fellows:
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