Harbor Freight Tools 3914 Setting the Presser Foot Pressure, Adjusting the Feed Timing

Raises

Presser

Foot

Presser

Foot Lever

(18d)

Lowers

Presser

Foot

Figure 29

1.To raise the Presser Foot, turn the Presser Foot Lever up. The Presser Foot will go up about 1/4” and stop.

2.To lower the Presser Foot, turn the Presser Foot Lever down.

Setting the Presser Foot Pressure

Increase Decrease

ADVANCED SETTINGS

The Sewing Machine is set at the factory for using with jean weight materials. The following adjustments are needed only when using the machine for unusual types of fabric or when changing machine components. These procedures should be performed only by a qualified sewing machine technician.

Adjusting the Feed Timing

Rotating Hook (20c)

Set

Screws

Figure 31

1. Loosen Set Screws on the side of the

Tension Tension

Presser

Rotating Hook (20c) and re-position the

Regulator

(20d)

	Presser
	Spring
	Regulator Nut
Figure 30	(19d)

1.Loosen the Presser Spring Regulator Nut (19d) by turning it counterclockwise.

2.Turn the Presser Regulator (20d) clockwise to increase Presser Foot pressure and counterclockwise to decrease Presser Foot pressure.

3.After adjustment, tighten the Presser Spring Regulator Nut.

Rotating Hook as follows:

a. To advance the feed timing in order to

prevent uneven material feed, rotate the

Rotating Hook up (clockwise).

b. To delay the feed timing in order to

increase stitch tightness, rotate the

Rotating Hook down (counterclockwise).

2. Retighten the Set Screws.

Adjusting Feed Dog Height

The Feed Dog is factory adjusted so that it juts out from the Throat Plate surface .031” (0.8 mm) to .035” (0.9 mm). If the Feed Dog juts out too much, puckering may result when sewing lightweight materials. To adjust the height of the Feed Dog:

REV 10b
SKU 3914	For technical questions, please call 1-800-444-3353.	Page 17