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Union Special Symaskin 35800DNU

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ADJUSTING INSTRUCTIONS / ILLUSTRATED PARTS LIST

MANUAL NO. PT9804-GR

STYLES

35800DLU

35800DNU

35800DRU

35800DRW

35800DWW

35800PZ

35800DZ

35800

High Speed

Feed- Off- The- Arm

With

Plain Feed

Differential Feed

REV 01/14/08

Manual No. PT9804-GR Adjusting Instructions & Illustrated Parts List for

35800 Series Machines

PREFACE

This parts manual has been prepared to assist you in locating individual parts or assemblies on 35800 Series machines.

It is the desire of Union Special that each machine run at its optimum performance. Parts listed in this manual are designed

specifically for your machine and are manufactured with utmost precision to assure long lasting service.

This manual has been comprised on the basis of available information. Changes in design and/or improvements may

incorporate a slight modification of configuration in illustrations or part numbers.

On the following pages are illustrations and terminology used in describing the parts used on 35800 Series machines.

Union Special Corporation Rights Reserved In All Countries

Printed in U.S.A. August 2007

DENTIFICATION OF MACHINES

Each UNION SPECIAL machine is identified by a style number, which is stamped into the style plate affixed to the middle of the

machine under the tension assembly.

The serial number is stamped on a plate attached to the right rear top of the machine.

CONTENTS

IDENTIFICATION OF MACHINES ............................................................................................................................................................................. 2

SAFETY RULES .......................................................................................................................................................................................................... 4

CLASS DESCRIPTION ............................................................................................................................................................................................. 5

STYLE OF MACHINES .............................................................................................................................................................................................. 5

ILLUSTRATIONS ........................................................................................................................................................................................................ 6

IDENTIFYING PARTS ................................................................................................................................................................................................. 6

NEEDLES .................................................................................................................................................................................................................. 6

TERMS ...................................................................................................................................................................................................................... 6

THREADING & OILING FOR PLAIN FEED ............................................................................................................................................................... 7

THREADING & OILING FOR DIFFERENTIAL FEED ................................................................................................................................................... 8

LUBRICATION .......................................................................................................................................................................................................... 9

THREADING ............................................................................................................................................................................................................. 9

ADJUSTING INSTRUCTIONS .................................................................................................................................................................................... 9

TORQUE REQUIREMENTS ...................................................................................................................................................................................... 10

SYNCHRONIZING NEEDLE AND LOOPER MOTIONS .......................................................................................................................................... 10

TIGHTENING NEEDLE HEAD ................................................................................................................................................................................. 11

ALIGNING NEEDLES IN THROAT PLATE SLOTS .................................................................................................................................................... 11

CENTERING THE CYLINDER .................................................................................................................................................................................. 11

SETTING THE LOOPER ........................................................................................................................................................................................... 11

SETTING THE LOOPER (CONT.) ............................................................................................................................................................................ 12

SETTING HEIGHT OF NEEDLE BAR ........................................................................................................................................................................ 12

SETTING THE FEED DOGS FOR PLAIN FEED ......................................................................................................................................................... 12

SETTING THE FEED DOGS FOR DIFFERENTIAL FEED ............................................................................................................................................. 12

SETTING THE FEED DOGS FOR DIFFERENTIAL FEED (CONT.) .............................................................................................................................. 13

CHANGING STITCH LENGTH ................................................................................................................................................................................ 13

SETTING REAR NEEDLE GUARD ............................................................................................................................................................................ 13

PRESSER FOOT AND PRESSER BAR ADJUSTMENT ............................................................................................................................................... 14

UPPER FEED ROLLER ADJUSTMENT ...................................................................................................................................................................... 14

UPPER FEED ROLLER ADJUSTMENT (CONT.) ....................................................................................................................................................... 15

THREAD TENSION AND RELEASE .......................................................................................................................................................................... 15

DIFFERENTIAL CONTROL ...................................................................................................................................................................................... 15

SETTING NEEDLE THREAD TAKE-UP AND FRAME EYELET .................................................................................................................................... 16

LOOPER THREAD TAKE-UP ADJUSTMENT ............................................................................................................................................................ 16

FOLDER ADJUSTMENT .......................................................................................................................................................................................... 17

AIR BLOWER TUBE ADJUSTMENT .......................................................................................................................................................................... 17

MAIN FRAME, CAST-OFF PLATE, EYELETS, MISCELLANEOUS COVERS AND BUSHINGS ................................................................................. 19

MAIN FRAME, CAST-OFF PLATE, EYELETS, MISCELLANEOUS COVERS AND BUSHINGS (CONT.) ................................................................... 21

CYLINDER COVERS AND BUSHINGS FOR PLAIN FEED ....................................................................................................................................... 23

CYLINDER COVERS AND BUSHINGS FOR PLAIN FEED (CONT.) ........................................................................................................................ 25

CYLINDER COVERS AND BUSHINGS FOR DIFFERENTIAL FEED .......................................................................................................................... 27

CYLINDER COVERS AND BUSHINGS FOR DIFFERENTIAL FEED (CONT.) ........................................................................................................... 29

DETACHABLE HEAD ASSEMBLY ........................................................................................................................................................................... 31

OILING, NEEDLE LEVER, CRANKSHAFT AND MAIN SHAFT PARTS ..................................................................................................................... 33

PLAIN FEED BAR, FEED LIFT & FEED DRIVE COMPONENTS FOR PLAIN FEED .................................................................................................... 35

DIFFERENTIAL FEED BAR, MAIN FEED BAR, FEED LIFT ECCENTRIC ASSEMBLY FOR DIFFERENTIAL FEED ......................................................... 37

FEED DRIVE COMPONENTS, LOOPER DRIVE COMPONENTS AND LOOPERS FOR PLAIN FEED ..................................................................... 39

LOOPERS, LOOPER HOLDERS, FEED DRIVE COMPONENTS AND LOOPER AVOID COMPONENTS FOR DIFFERENTIAL FEED ..................... 41

LOOPERS, LOOPER HOLDERS, FEED DRIVE COMPONENT AND LOOPER AVOID COMPONENT FOR DIFFERENTIAL FEED (CONT.) .......... 43

UPPER ROLLER FEED, FOOT LIFTER AND THREAD TENSION PARTS .................................................................................................................. 45

UPPER ROLLER FEED, FOOT LIFTER AND THREAD TENSION PARTS (CONT.) .................................................................................................... 47

PULLEY, CRANKSHAFT, CLUTCH AND CLUTCH DRIVING MECHANISM ........................................................................................................... 49

PULLEY, CRANKSHAFT, CLUTCH AND CLUTCH DRIVING MECHANISM (CONT.) ............................................................................................ 51

SEWING PARTS ...................................................................................................................................................................................................... 53

THREAD STAND ..................................................................................................................................................................................................... 55

ACCESSORIES ....................................................................................................................................................................................................... 56

NUMERICAL INDEX OF PARTS .............................................................................................................................................................................. 57

NOTES .................................................................................................................................................................................................................... 60