Holding the feed-driving eccentric in the same manner as stated above, you replace it on the hook-driving shaft.
Push the hook-driving shaft through the center hook-driving shaft bushing. Replace the hook- driving gear so that the flange with the setscrews is facing toward the left.
Place the feed-lifting eccentric on the hook- driving shaft and slide the hook-driving shaft into the front hook-driving shaft bushing, leaving approximately 2 inches of the hook-driving shaft extended to the right of the rear hook-driving shaft bushing.
Replace the safety clutch pulley so that the safety clutch hook-driving shaft stop collar, with the screws in it, is flush with the right end of the hook-driving shaft. Turn the safety clutch pulley until the spline screw marked with the letter S is positioned over the spline in the hook-driving shaft. Tighten the spline screw and the setscrew.
The cylinder end of the feed-driving rockshaft is placed from the left into the feed-driving rockshaft bushing. The flat side of the feed- driving rockshaft stop collar is placed flush with the bushing, and the rockshaft is moved forward to enter the stop collar. The feed-driving crank is placed next to the stop collar, and the rockshaft is moved forward to enter the crank. T he remaining stop collar is placed on the rockshaft with the flat side to the right. The rockshaft (with the base of the feed bar toward the operator) is moved through and 1 inch past the right bushing. Holding the base of the feed bar toward you, rotate the rockshaft downward toward the bed of the machine and fit the feed dog into the throat plate.
Place the feed-lifting eccentric fork over the feed-lifting eccentric and fit the base of the feed bar into the slot at the top of the feed-lifting eccentric fork. When the feed-lifting eccentric fork is in position, the rounded end of the fork 4-28 will be facing you. To secure the feed-lifting eccentric fork to the feed dog, you must place the feed eccentric fork screw into the space provided and tighten it.
The feed-driving rockshaft crank is attached to the needlebar rock frame rockshaft crank and connection. To replace it, insert the needlebar rock frame rockshaft crank and connection with the curved portion upward and the crank hanging down into the arm through the opening in the bed of the machine. Slide the feed-driving rockshaft crank over the feed-driving rockshaft. Do not tighten the crank. Ensure all other screws are tight.
This completes the assembly of the parts in the bed of the machine. Now we will assemble the parts located in the arm of the machine.
(At this point, the machine is placed in an upright position.) Place the needlebar rock frame rockshaft in the lower bushing in the face of the machine. Push it through until the end of the shaft is flush with the bushing in the arm of the machine. This may be viewed through the opening in the top of the machine arm. Place the screwdriver through the opening in the right side of the machine arm and engage the needlebar rock frame rockshaft crank. Lift the crank with the screwdriver so that it is on line with the needlebar rock frame rockshaft. With the left hand, push the rockshaft through the crank. Do not tighten the crank.
In replacing the arm shaft, be certain that the needlebar crank friction washer is on the shaft. Insert the arm shaft in the top bushing in the face of the machine; then push it through until it can be seen through the opening located on the rear of the machine arm.
Insert the larger end of the presser-lifting eccentric connection link (figure 4-10A) with the oil holes facing up. Slowly push the arm shaft through the arm of the machine until you can see the arm shaft at the opening on the top of the machine nearest the balance wheel.Continue Reading