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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:
65
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