9
NEEDLES
Selection of proper needle size is determined by size of thread used. Thread should pass freely through the needle eye in
order to produce a good stitch formation.
Each needle has both a type and size number. The type number denotes the kind of shank, point, length, groove, finish
and other details. The size number, stamped on the needle shank, denotes largest diameter of blade, measured midway
between shank and eye. Collectively, type and size number represent the complete symbol which is given on the label
of all needles packaged and sold by UNION SPECIAL. See "STYLE OF MACHINES" for the standard recommended needle
type & size for your machine.
To have needle orders promptly and accurately filled, an empty package, a sample needle, or the type and size number
should be forwarded. Use the description on the label. A complete order would read: “1000 Needles, Type 130GS, Size 140/
054”.
LUBRICATION
The oil has been drained from the machine before shipping and the reservoirs must be filled before beginning to operate.
Use a straight mineral oil with a Saybolt viscosity of 90 to 125 seconds at 100° Fahrenheit. Union Special Part No. 28604R.
Oil is filled at oil caps (A & D, Fig. 1A, B). The level is checked at sight gauges (B) and (E). Maintain the oil level between the
red lines of the gauges.
The machine is equipped with a continuous running rotary driven oil pump. The action of the oil can be observed through
oil sight (A) and (D) in the front and back top covers.
When starting a new machine, filling the reservoirs or when beginning to operate a machine that has been idle for some
time, it may be necessary to prime the pump. To do this, remove the two plug screws (C). Apply oil to these holes and
operate machine until bubbling can be observed at the windows. Replace screws (C).
CAUTION: If oil does not bubble when machine is running, the circulating pump is inoperative.
Oil may be drained from the machine at two places, plug screw (F) located in the bottom of the cylinder and plug screw
(G) at the back of the main frame below the handwheel.
THREADING
A convenient means for threading the looper has been provided. When loopers are at the left end of their travel, press the
knob (H, Fig. 1A, B) and loopers will back out of position, leaving them easily accessible. Thread the machine as illustrated
in (Fig. 1A, B). After threading, push loopers back into position.
ADJUSTING INSTRUCTIONS
NOTE: Instructions stating direction of location, such as right, left, front or rear of machine, are given relative to operator’s
position at the machine. The handwheel rotates counterclockwise, in operating direction; when viewed from the
right end of machine.
TORQUE REQUIREMENTS
Torque specifications given in this catalog are measured in inch-pounds or Newton-meters. All straps and eccentrics must
be tightened to 19-21 in. lbs. (2.1-2.3Nm) unless otherwise noted. All nuts, bolts, screws, etc., without torque specifications
must be secured as tightly as possible, unless otherwise noted. Special torque specifications for connecting rods, links,
screws etc., are shown on the parts illustrations.
Table 1
epyTeldeeNnoitpircseDelbaliavAseziS
SG031
,dettops,eyellab,evoorgkcurts,evoorgelbuodtrohS
.detalpmuimorhc,
tnioptnemnrevog
,940/521,440/011,040/001,630/090,230/080
060/051,450/041
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