62
104 72 79-26
Lower Shaft
FOR SAFTEY REASONS ALWAYS DISCONNECT THE POWER CORD FROM THE MACHI-
NE BEFORE REMOVING THE CIRCUIT BOARD AND MAKE SURE TO USE WRIST BAND
AND ESD MAT.
Dismantling
1. Remove rear cover and front cover.
2. Remove hook cover and Hook.
3. Remove the base plate.
4. Remove the feed dog step motor unit
5. Remove the feed dog unit.
6. Remove the Main PC board.
7. Remove the Synchronizer card holder.
8. Remove the Synchronizer screen from the lower shaft.
9. Push the drive belt of the lower shafts cog wheel.
10. Remove the two screws and the clamps that hold the lower shaft in position.
11. Lift up the lower shaft a bit and remove it towards right of the machine.
Mounting
1. Before mounting the lower shaft make sure to open up the screws on the arm shafts cog wheel.
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3. Place the clamps on the bearings and tighten with the two Torx 20 screws.
4. Push on the main belt on the lower shafts cog wheel.
5. Mount the Synchronizer wheel, it should be snapped on to the long sided pin on the lower shaft.
6. Mount the Synchronizer card holder.
7. Mount the Main PC board.
8. Mount the feed dog unit.
9. Mount the feed dog step motor unit - Always check the setting “19. Pre-setting the feed unit step motor”
before mounting the feed dog step motor unit.
10. Mount the base plate.
11. Mount the Hook and Hook cover.
The below have to be checked or set, either during or after the parts are mounted.
4. Setting of the hook in relation to the feeding eccentric.
3. Play of the hook gear.
5. Gap between the needle and the hook.
6. The setting of the needle plate (hook cover) in relation to the needle in the feeding direction.
7. Setting the feed dog in relation to the needle plate.
9. Feed dog height.
11. Needlebar height.
12. Timing of the hook in relation to the needle.
18. Stitch length balance, basic setting.
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Dismantling and mounting