Service manual
Table Of Contents
2-3
Reassembly
(1) Install inner rotor to pump shaft with pin.
(2) Place pump shaft
in
pump case. Install pump drive
gear to the shaft with pin.
(3) Place outer rotor in pump case, and install pump
case cover complete with gasket and oil strainer.
(NOTES]
a) Ifpumpshaft
or
drive gear has been replaced,
a new pin hole must
be
made by drilling
through the gear
mounted
on the shaft.
b)
After putting
on
the cover, check
to
be sure
that the match
marb
are correctly indexed.
If
the cover
is
in a wrong position relative
to
the case, the
pump
will
not
draw in oil.
Tighten the bolts after checking to be sure
that
the marks are correctly matched.
c) After reassembling
the
pump
complete with
its strainer,
immerse the strainer in a pool
of
oil and run the drive gear by hand
to
make
sure
that
the pump
is
capable
of
sucking oil
in.
3. Oil ftlter
The filter
is
mounted
on
the right-hand side
of
crankcase
at its center part. The oil
bypS5
valve
for letting
the oil bypass the element is actually a relief
valve
located
in
the center portion
of
the element. This
valve
is
set
to
open when the differential pressure across the
element rises
to
1.0 ± 0.2 kg/cm
2
(14.2 ± 2.8 psi); when
the
valve
opens, the oil flows directly from inlet side
to
outlet side. The filter element must be serviced regularly
or before the element becomes so dirty
as
to actuate this
bypass valve.
The oil filter has a built-in relief
valve
operating
in
response
to
the oil pump discharge pressure. This
valve
starts relieving when the pressure rises to 3 ± 0.2 kg/cm
l
(43
± 2.8 psi), thereby bleeding the excess oil to the oil
pan and limiting the pressure
of
oil reaching the engine
oil gallery
to
a constant level.
3-1
Disassembly
(1) Remove filter
(1) and relief
valve
(2) from filter
bracket (3).
3-2 Inspection
The filtering element
is
prescribed to be replaced after
each 300 hours
of
operation or whenever its filtering
performance
is
noted to have deteriorated. Inspect the
element
to
see
if it has any signs
of
rupture or fissure;
and
if
so, replace it by a new one. Visually examine the
filter bracket for distortion and cracks.
-
51-
Fitting cover
to
case
by
matching marks