3.
The
Lubrication
System
An
oil
reservoir
has been
Incorporated
in the top cover of the
machine
(Figs.
4 & 5)
which holds enough oil to ensure adequate lubrication of the arm shaft parts.
After pulling out plug C
(Fig.
3),
fill
about 4
Vs
fl.
oz. of ordinary sewing machine oil
(Order
No.
280-1-120122)
or a technical white oil having a viscosity of 150
R/68°F
or
175
S/es'F
Into
the
reservoir.
The oil in the reservoir
will
last for a longer time, depending on how long the ma<^ine is
in operation each day.
Oil
should be replenished when the red tip of the oil level gauge
which can be
seen
through the oil
sight
glass
emerges
from the
surface
of the oil.
Fig. 4 shows the
open
oil reservoir with oil wick, Fig. 5 the bottom of the reservoir with
the lower end of oil wick D which protrudes into hole A and supplies oil to the arm
shaft
center
bearing.
The
oil
seeps
through
a
vent
hole
into
the
hollow
arm
shaft
and
is
distributed
inside
the
arm
shaft by a packing. Emerging from additional vent holes, oil is supplied to the various
arm shaft
bearings
and the feed eccentric. Dripping oil is collected by a large oil drip
pan and
accumulates
in a detachable plastic oil bottle. (Fig. 6)
R
7715
Fig.
3
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