Timing Between The Needle And Hook; Safety Clutch Device - HIGHLEAD GC24699 Instruction Manual Parts Catalog

arrow(timing mark)put on the timing belt is in line with the line on the boss of lower shaft bearing.
（3）If the timing mark is not in line with the line,remove the timing belt and install it again to adjust.
14. TIMING BETWEEN THE NEEDLE AND HOOK(Fig.16,Fig.17,Fig.18)
（1）Set the stitch length to "0"on the feed setting dial.
（2）Lean the machine head backward.
（3）Loosen the feed lifting rock shaft crank set screw A and B.
（4）Set the needle at the lowest position.
（5）Adjust the distance between presser bar and vibration bar
to 8mm and temporarily tighten the feed lifting rock shaft crank set
screw A and B.
（6）Check the right feed lifting rock shaft crank is connected
with the link at right angle,as shown in Fig.17.
（7）If the connection is not at righr angle,remove the back
cover,loosen screw C .
（8）And regulate the right angle.
（9）After the complention of adjustment,fully tighten the
screw A,B and C.
Note:At the same time make sure that the position between the
needle and the feed dog.
15. SAFETY CLUTCH DEVICE(Fig.19,Fig.20)
Safety clutch device is installed to prevent the hook and belt from
damage in case the thread is caught into the hook when the machine is
loaded abnormally during operation.
（1）Function of safety clutch
a.When the safety clutch operate,the belt pulley will be unloaded,the lower shaft will stop.Only the arm
shaft operate.The machine stop operation.
b.Clean the thread thoroughly which is caught into the hook.
c.Turn the belt bushing by hand,check the lower shaft rorates lightly.Then set the clutch device in the
starting position.
（2）Set the safety clutch
— 5 —