Changing The Thread Take-Up Spring Stroke And Pressure; Setting The Hand Lifter; Setting The Presser Foot Pressure; Adjusting The Feed Timing - Harbor Freight Tools 3914 Assembly And Operating Instructions Manual

Changing the Thread Take-up Spring Stroke and Pressure

1. Loosen Set Screw (2).
2. To increase the stroke, turn the Tension
Knob Screw (3) clockwise (A).
3. To decrease the stroke, turn the Tension
Knob Screw (3) counterclockwise (B).
4. Loosen Set Screw (2) and pull out the
Tension Arm (5).
5. Loosen Set Screw (4) and remove the
Tension Knob Screw (3).
6. Turn the Tension Knob Screw (3) clockwise (A) to increase pressure; or turn
counterclockwise (B) to decrease pressure.
7. Replace Tension Knob Screw (3), tighten Set Screw (4), and replace the assembly.

Setting the Hand Lifter

1. To stop the machine with its Presser Foot up,
turn the Hand Lifter (1) up (A).
The Presser Foot will go up about 1/4 inch and
stop.
2. To set the Presser Foot to its original position,
turn the Hand Lifter (1) down (B).
Using the Knee Lifter, you can get the standard Presser Foot lift of about 1/2 inch.

Setting the Presser Foot Pressure

1. Loosen Nut (2), and turn the Presser Spring
Regulator (1) clockwise (A) to increase Presser
Foot pressure.
2. To decrease Presser Foot pressure, turn the
Presser Spring Regulator (1) counterclockwise.
3. After adjustment, tighten Nut (2).

Adjusting the Feed Timing

1. Loosen Set Screws (2) and (3) on the Feed
Eccentric Cam (1) and properly position the
Eccentric Cam. Retighten the Set Screws.
2. To advance the feed timing in order to prevent
uneven material feed, move the Feed Eccentric
Cam up (clockwise).
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