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Summary of Contents for Viking Automatic 21

Page 1: ...SERVICE MANUAL for VIKING home sewing machine class 21 ...

Page 2: ...e throat plate hole 3 Setting center position for zig zagging 3 Tangential adjustment of sewing hook 4 Setting needle bar height 4 Setting clearance between sewing hook and needle 5 Setting the feed dog height 6 Timing the feed 6 Lateral setting of the feed dog 6 Setting the thread giver 7 Setting the take up spring tension 8 Changing camshaft drive belt ...

Page 3: ... 5 Loosen screw 5 Fig 1 with a screwdriver 4 Fig 1 and tighten it after making the setting Fig 1 2 Timing the needle swing Set the needle swing control for maximum stitch width Turn the worm gear 1 Fig 2 on the camshaft pertaining to the zig zag drive until the left hand and right hand movements of the needle bar frame 3 Fig 3 terminate when the tip of the needle is more than V32 in 7 mm above the...

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Page 5: ...centre position and the needle swing control at 0 Loosen screw 1 Fig 4 and make the setting by pressing or easing follower 2 Fig 4 until the needle is centred in the throat plate hole 5 Tangential adjustment of sewing hook Set the machine for straight stitching in the right hand starting position and for a zig zag stitch 5 u in 2 mm wide Use the handwheel to bring the needle about s 64 in 2 mm abo...

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Page 8: ...amshaft Loosen screw 1 Fig 9 to make this setting and then tighten it again 11 Lateral setting of the feed dog Turn lever 1 Fig 7 on its shaft 2 Fig 7 Loosen screw 3 Fig 7 for this setting and tighten it again afterwards 12 Setting the thread giver This setting is made by turning the thread tensioner Open the face plate first to get at the screw at 1 Fig 10 which holds the tensioner Loosen the scr...

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Page 10: ...wheel from the machine sliding the loose belt 3 Fig 12 under the wheel in towards the centre of the machine on both sides so that the handwheel and belt can come out through hole 2 Fig 12 in the sew ing head To replace the handwheel and belt proceed in the opposite manner Place the new belt in the belt groove on the handwheel slide the free end of the belt into place holding the free section of be...

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