CONTENTS
1. NEEDLES & THREADING THE MACHINE
1-1 Needles ···················································· 1
1-2 Replacing the needle ·································· 1
1-3 Threading the machine ······························ 1
2. MACHINE SPEED
2-1 Machine speed & direction in which the machine
pulley runs ·············································· 2
2-2 Motor & belt ············································· 2
3. LUBRICATION
3-1 Oil ··························································· 3
3-2 Oiling ······················································ 3
3-3 Replacing the oil and the filter element ········ 3
4. SEWING MACHINE INSTALLATION
4-1 Cutting the machine table ·························· 4
4-2 Installing the machine ······························· 5
5. TIMING OF THE LOOPER TO THE NEEDLES
5-1 Angle and height for installing the looper ····· 5
5-2 Looper left-to-right movement ····················· 6
5-3 Looper setting distance ······························ 6
5-4 Needle height ··········································· 6
5-5 Needle/looper front-to-back relationship ······· 7
6. ADJUSTING THE NEEDLE GUARDS
6-1 Position of the needle guard (rear) ··············· 7
6-2 Position of the needle guard (front) ·············· 8
7. ADJUSTING THE FEED DOG & STITCH LENGTH
7-1 Feed dog height & tilt ································ 8
7-2 Stitch length ············································· 8
8. ADJUSTING THE PRESSER FOOT
8-1 Presser foot pressure ································· 9
8-2 Position of the presser foot & foot lift ············ 9
9. ADJUSTING THE STITCH FORMATION
9-1 Position of the thread support ··················· 10
9-2 Position of the looper thread eyelets ··········· 10
9-3 Position of the looper thread take-up ·········· 10
10. ADJUSTING THE REAR PULLER DEVICE
10-1 Manual lever ········································· 11
10-2 To adjust the puller pressure ··················· 11
10-3 Adjusting the feeding amount of the rear
puller ·················································· 11
11. ADJUSTING THE FRONT PULLER DEVICE
11-1 To insert elastic and adjust the feeding amount
of the front puller ·································· 11
12. ADJUSTING THE BK AUXILIARY FEEDING DEVICE
12-1 Auxiliary feed dog height & tilt ················ 12
12-2 Installing the auxiliary presser foot ·········· 12
13. ADJUSTING THE BK FRONT KNIFE DEVICE
13-1 Adjusting the clearance between the left and
right knives ·········································· 13
13-2 Disassembling/reassembling the lower
knives ·················································· 13
13-3 Disassembling/reassembling the upper
knives ·················································· 14
13-4 Overlap of the upper and lower knives ······ 14
13-5 Resharpening the lower knives ················ 14
14. CLEANING THE MACHINE
··················· 14
