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curved plates,
dissipates the heat
and
prevents
fire from
extending
through the arrestor.
5.
COOLING SYSTEM
a. All engines are
equipped with a
positive
displacement
type
water
pump.
Six and
eight
cylinder en-
gine
pumps
are
rubber
impeller
type. Two and four cylinder engines
have bronze
gear pumps.
The oppo-
site type in
each case can
be ob-
tained on special order.
b. In
the
Twin,
Atomic,
Utility
and Super-Four,
the water
flow is
from
pump to
block,
to head,
to
manifold, then overboard.
In the
case of
the
Unimite,
the
flow is
from pump to
manifold, to
block, to head, then overboard.
All six cylinder
engines have
the
same
flow
which is:
pump to
oil
cooler,
to manifold
for one
com-
plete pass, then into block through
four
to
six
holes
(depending on
engine
size),
then
to
head,
to
heat riser on intake manifold,
and
then overboarde
c. See
special
diagram of
rather
complicated
water flow in
special
manual
furnished
with
each
v-8
engineo
d. Where either manual or automatic
temperature
control is used,
vary-
ing amounts of discharge water will
be recirculated.
See Fig. 11.
6.
REVERSING GEARS
Four types
of reversing
gear sys-
tems are used on
UNIVERSAL engines
covered
by
these
instructions.
Three
of
these
are
mechanically
operated,
and the
fourth is a hy-
draulic system.
a. Joes Model Reversing Gear
(1)
The Joes
is
currently
model reversing
being used
on
gear
the
-41-
Super-Four series engines only.
(2) The forward .d.r ive on this unit is
a double
friction
clut9h.
On the
propeller end are a series of fric-
tion discs of steel and bronze which
are
mortised into
the engine
and
propeller drives and casing. On the
engine end, a split cone clamps the
engine shaft and frictionally locks
the gears to it.
(3)
When the reversing gear lever is
moved forward the toggles force home
the plungers, clamping all friction
surfaces together. All moving parts
are then locked
and the whole unit
functions as
a solid coupling
be-
tween the motor and propeller shafts.
(4)
Reverse
drive
is
obtained by
throwing
the lever back.
This re-
leases the forward drive and throws
on the brake band by means of a camG
This cam
passes through
a slot in
the camshaft
that operates between
the
cam roll
and
cam shoe.
This
clamps the brake band
and prevents
the
outside case
from
revolving.
When the
casing is thus
held from
revolving,
the gearing
drives the
propeller in the
reverse direction
at 80 - 88% of the motor
speed~
(5)
To place in neutral,
the leve=
is placed
midway
bety/een
forward
and
reverse,
which
releases both
the reverse and
forward drives and
permits the gearing to run
idle~
b. Paragon Model Reversing Gears
(1)
Paragon
reversing
gears
are
used on all current
production en-
gines
except
the
Super-Four
and
those models which are equipped with
hydraulically
operated
reversing
gears or Sta-Nu-Tral manual gears.
(2) Power from the engine is trans-
mitted
through the
engine
sleeve
gear and the
reverse idler pinions
to the forward clutch or to the re-
verse drive gear.
(3)
The forward clutch
consists of
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