TM
9-879
20
LUBRICATION
and
blown out through
outside breather. However,
a
moderately
driven engine, making
only
short runs now and then, and
seldom
thoroughly
warmed
up. is
likely to accumulate
an
increasing
amount
of water in oil tank.
This
water will, in freezing weather, become slush
or ice
and. if allowed
to accumulate too
long, may
block oil lines
with resulting damage to engine. Also,
water
mixed with oil for some
time,
forms
a
heavy
sludge
of considerable
acid
content that is very
harmful
to bearings
and other
internal
engine
parts. To sum
it
up
briefly, an
engine
that is used
only for
short
runs during freezing
weather
requires
frequent oil changes along with thorough
flushing
of
tank to remove any
accumulated sludge.
(9)
Transmission
Filler
Opening.
Check
oil level in trans-
mission
case every
250 miles
and
add engine oil as necessary to
bring
level up to filler
opening. If
motorcycle
is run
unusually long dis-
tances,
inspect more
frequently. Motorcycle must be on
rear stand
in
straight upright
position when checking
oil
level or
filling
trans-
mission case. Use
same grade
of oil used
in engine,
summer, and
winter. If gear shifting
difficulty is
caused
by
oil congealing
in
ex-
tremely cold
weather,
thin
oil with small
amount of
kerosene or dry-
cleaning solvent. Every
1. 000 miles, dram and refill
transmission
to
level of transmission
filler plug
opening
with specified
grade
of engine
oil.
Transmission
holds
y^
pint of oil.
To
drain transmission case
remove
filler plug
and lay motorcycle on right side. CAUTION: Do
not
leave motorcycle
on side
longer than
two
minutes.
(10)
Drive
Chains.
(a)
Front
and rear drive chains are
automatically supplied v/ith
lubrication by engine
oil pumps. Chain oilers
are
adjustable and
may
need
occasional
readjustment
to
meet lubrication requirements
of
varied operating conditions.
Every 1,000
miles
(or more often if oper-
ating
conditions are
extremely
severe)
inspect front primary drive
chain for adequate lubrication
(fig.
36).
(b) At every
1,000-mile
period rear drive
chain should
have
addi-
tional lubrication as
follows: Remove chain,
wash thoroughly
in dry-
cleaning solvent
and
hang it up to dry.
Then
soak chain
in SAE 10
engme oil for
a short
period of time to allow
oil to penetrate into all
chain bearings.
Drain
chain and
wipe
ofT excess oil. Install rear
chain
(par.
63).
(This
attention
is not required
by front chain.) Readjust-
ment of
chain
oilers
must be made only
by
organization
mechanic
(par.
61).
CAUTION:
Inspect frequently
and make sure that rear
chain oiler supply
pipe
is
clear,
not bent or
damaged.
d. Before Applying
Lubricanl. Always
wipe dirt from the lubri-
cation fittings
or plugs
so that dirt will
not
enter with
the
lubricant
Lubricate
all chassis
points after washing
vehicle
or
after vehicle
has
been operated
in streams
or extremely
muddy
or
slushy
roads. CAU-
TION; It is
extrennely
important
that high-pressure cleaning
streams
33
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