ILLUSTRATIONS
This manual has been arranged to simplify ordering repair parts. Exploded views of various sections of the mechanism are shown
so that the parts may be seen in their actual position in the machine. On the page opposite the illustration will be found a listing
of the parts with their part numbers, description and the number of pieces required in the particular view being shown.
Numbers in the first column are reference numbers only, and merely indicate the position of the part in the illustration. The reference
number should never be used in ordering parts. Always use the part number listed in the second column.
Component parts of sub-assemblies which can be furnished for repairs are indicated by indenting their descriptions under the
description of the main sub-assembly. As an example refer to the following text.
9. 29126 EC Upper Looper Drive Shaft Assembly ................................................................................. 1
10. 22503 F Screw ................................................................................................................................. 1
11. 39543 E Cam Follower Locking Clamp ..................................................................................... 1
It will be noted in the previous example that the cam follower, bushing and cam guide and the upper looper drive shaft are not
listed. The reason is that replacement of these parts individually is not recommended, so the complete upper looper drive shaft
assembly should be ordered.
When a part is common to all machines covered in this manual, no specific usage will be mentioned in the description. However,
when the parts for the various machines are not the same, the specific usage will be mentioned in the description and, if necessary,
the difference will be shown in the illustration.
A numerical index of all the parts shown in this manual is located at the back. This will facilitate locating the illustration and
description when only a part number is known.
IDENTIFYING PARTS
Where the construction permits, each part is stamped with its part number. On some of the smaller parts and on those where
construction does not permit, an identification letter is stamped in to distinguish the part from similar ones.
PLEASE NOTE: Part numbers represent the same part, regardless of which manual they appear. On all orders please include
part number, name and style of machine for which the part was ordered.
NEEDLES
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 the largest diameter of the blade measured between the shank
and the eye. Collectively, the type number and size number represent the complete symbol which is given on the label of all
needles packed and sold by Union Special.
TYPE DESCRIPTION
118GAS Extra short, double groove, struck groove, .060" diameter shank, chromium plated needle.
Sizes available 065/025, 070/027, 075/029, 080/032, 090/036.
118GBS Extra short, single groove, struck groove, spotted .060" diameter shank, chromium plated needle.
Sizes available 075/029, 080/032.
118GHS Same as 118GBS, except with ball point. Sizes available 070/027, 075/029, 080/032.
118GJS Same as 118GHS, except with tapered blade and ball point. Sizes available 065/025, 070/027, 075/029.
118GKS Round shank, round point, extra short, double groove, struck groove, spotted, chromium plated needle.
Sizes available 070/027, 075/029, 080/032.
36211 Retainer needle, no scarf, chromium plated. Sizes available 065/025, 070/027, 075/029.
APPLICATION
When changing the needle, make sure it is fully inserted in the needle driving arm before the clamp screw is tightened.
To have needles promptly and accurately filled, an empty package, a needle sample, or the type and size number should be
forwarded. Use the description on the label. A complete order should read as follows: "100 needles, type 118 GKS, size 075/029".
TORQUE REQUIREMENTS
Torque (measured in inch-pounds) is a rotating force (in pounds applied through a distance by a lever (in inches or feet). This is
accomplished by a wrench, screwdriver, etc. Many of these devices are available, which when set at the proper amount of torque
will tighten the part to the correct amount and no tighter.
All straps and eccentrics should be tightened to 19-21 inch-pounds (22-24cm/kg) unless otherwise noted.
All other nuts, bolts, screws, etc. should be tightened by hand as tightly as possible, unless otherwise noted.
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