Lubrication System - Honda CB250N Shop Manual

4.
Lubrication
System
Service Information
4-1
Oil
Pump
Removal/Installation
4-3
Troubleshooting
4-1
Oil
Pump
Disassembly/Assembly
4-4
Lubrication
System Diagram 4-2
Service Information
AWARMING
If
the
engine must be
running
to do
some
work,
make
sure the area
is
well-ventilated.
Never run the
engine
in
an en-
closed
area.
The
exhaust contains poisonous carbon.
monoxide
gas that
can cause
loss of
consciousness and
may
lead
to
death.
Run
the engine
in
an open area
or
with an exhaust
evacuation
system
in
an enclosed
area.
Used
engine
oil
may cause
skin
cancer
if
repeatedly
left
in.
contact with the skin for
prolonged periods. Although
this
is
unlikely
unless
you handle used
oil
on
a daily basis,
it
is
still
advisable
to
thoroughly
wash
your
hands
with
soap and
water
as
soon
as possible after handling
used
oil.
The
oil
pump
can be serviced with the engine
in
the frame.
The
service procedures
in
this
section
must be performed
after
the engine
oil is
drained.
When
removing and
installing
the
oil
pump
use care not
to
allow dust or
dirt
to
enter the engine.
If
any
portion of the
oil
pump
is
worn beyond
the
specified service
limits,
replace the
oil
pump
as
an assembly.
After the
oil
pump
has been
installed,
check
that there are no
oil
leaks
and that
oil
pressure
is
correct.
Troubleshooting
Oil
Level
Low
• Oil
consumption
External
oil
leak
Worn
piston
ring
or incorrect piston ring installation
Worn
valve guide
or seal--
-..
_
Low
Or
No
Oil Pressure
"
'
Ciogged
oil
filter
screen
Oil orifice collar
damaged
Incorrect
oil
being used
No
Oil
Pressure
•
Oil level too
low
Oil
pump
drive
gear broken
* Oil
pump damaged
(pump
shaftl
Internal
oil
leaks
Low
Oil
Pressure
---
•
Clogged
oil fitter
screen
•
Oil
pump worn
or
damaged
Internal
oil
leak
•
Oil orifice collar
damaged
Incorrect
oil
being
used
-
Low
oil
level
High
Oil
Pressure
..
•
Pressure
relief
vglve stuck
cldseti
•
Incorrect
oil
being
used
4-1