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SERVICE MANUAL

FOR

SINGER SEWING MACHINES

Classes 66, 99, and 185

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Summary of Contents for 99 Series

Page 1: ...SERVICE MANUAL FOR SINGER SEWING MACHINES Classes 66 99 and 185 ...

Page 2: ... the tension spring J Fig 1b is in place in the stud O then place the thread take up spring on the stud having the tail inside the coil of this spring in one of the grooves T of the stud and with the large loop N of the spring resting against the upper end of the recess at M Fig 1a Fig 1a shows the spring in the correct position on the stud The tail of the spring is not visible in these illustrati...

Page 3: ... and minus marks will be at the top with the minus sign to the left Then insert the tension spring F in the indicator with the first half coil of the spring straddling the lower half of the stud as shown in Fig 1d Place the stop washer E on the stud so that the extension will be above the tension stud Fig 1d ...

Page 4: ...movement When the spring is correctly set securely tighten the set screw R The tension on the thread take up spring should be just sufficient to take up the slack of the needle thread until the eye of the needle reaches the goods on its decent To increase the tension on the thread take up spring T loosen the tension screw stud S and force the take up spring from the recess in the regulator U to th...

Page 5: ......

Page 6: ...de plate slightly to the left then lift the right hand end and draw it toward the needle until it is disengaged from the spring A Fig 2 in the bed of the machine To replace the slide plate slip it into the slideway from the throat plate end as shown in Fig 2 being careful to see that both ends of the spring A enter the grooves on the underside of the slide plate ...

Page 7: ...w E Fig 3 be loosened for the purpose of removing the bobbin case as loosening the screw will bring the bobbin case out of location and cause difficulty in the stitching operation For instructions for adjusting bobbin case position bracket see page 8 Hold the bobbin case between the forefinger and thumb of the left hand as shown in Fig 4 Tilt the bobbin case to the left and at the same time slight...

Page 8: ...the fork straddles the position stud F Fig 5 Then with a slight twisting motion of the fork to the left and to the back lightly press the bobbin case downward until the edge of the sewing hook engages in the groove under the rim of the bobbin case Having set the bobbin case into the correct position lock the latch C Fig 5 in the notch D Fig 5 to hold the bobbin case in place Then replace the slide...

Page 9: ...in case position bracket to obtain the proper thread space between the bobbin case and the bobbin case bracket loosen the screw E Fig 3 and move the bracket until there is between 010 to 015 of an inch space at the heel of the bobbin case and the cushion spring then securely tighten the screw E Fig 3 ...

Page 10: ...gauge H Fig 7 on the upward stroke of the needle bar When the needle bar connecting stud is in this position the needle bar should be set so that the top of the eye of the needle will be about 1 16 inch below the point of the sewing hook In case the needle bar is not set at the correct height loosen the screw Q Fig 9 in the lower end of the needle bar connecting link K Fig 7 This screw can be reac...

Page 11: ...e top of its finger in line with the upper mark on the stud when the stud is at its lowest point Then turn the balance wheel over toward you until the lower timing mark on the needle bar connecting stud is centered on the top of the finger of the timing gauge H Fig 7 when the needle bar is on its upward stroke When the needle bar is in this position the point of the sewing hook should be directly ...

Page 12: ......

Page 13: ... take out the screw N Fig 8 and remove the feed dog Also loosen the set screw P Fig 8 and lift out the bobbin case position bracket F Fig 5 Loosen the oscillating hook crank clamping screw O Fig 8 and loosen the presser bar bracket screw M Fig 7 and raise the presser bar high enough to permit the sewing hook to be lifted from the machine ...

Page 14: ...t point by the feed raising bar the top of the feed points will be about 3 64 inch above the top surface of the throat plate When it is necessary to raise or lower the feed dog loosen the feed dog screw N Fig 8 and set the feed dog in the required position then securely tighten the feed dog screw N ...

Page 15: ...foot and the throat plate When the presser bar is lowered the presser bar will be parallel with the feed dog In case the presser bar is not correctly set raise the presser bar lifter the loosen the presser bar bracket screw M Fig 7 and raise or lower or turn the presser bar until it is set in the correct position as instructed above then securely tighten the screw M ...

Page 16: ...the shaft instead of permitting it to rotate freely Fig 10 To adjust end play remove the clamp motion nut balance wheel and clamp motion washer Slightly loosen the set screw P10 Fig 10 If the shaft is binding place a wooden dowel on the end of the shaft N10 and tap lightly with a hammer or wood block If too much end play exists in the shaft tap the bushing O10 with a wood block to move the bushing...

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