Porter International Box Spring Machine BS401-600

Warning: Always wear protective gloves and eyewear when performing maintenance tasks.

Is the oil jet in oil sight window 1 restricted or weak?

Does the oil contain foam or debris?

If either of the above checks fail, proceed with the following steps.

Remove bolts 5 and oil pan from machine.

Remove screws 6 and take out filter 4.

Clean filter 4 with new petrol and blow with low pressure air.

Replace filter 4 and tighten screws 6.

. Make sure oil level is correctly maintained in oil sight gauge.

. Make sure needle is correctly set and not damaged.

. Make sure threading is correct.

· Make sure chaining thread approximately

10 mm long remains behind presser foot.

It is necessary to have a chaining thread approximately 10 mm long behind the presser foot when starting to sew. This will avoid "skip-stitches."

After replacing needles or thread, check that a continuous, smooth neat chaining thread comes out from under the presser foot.

A. Pressure 1. Tighten the thumb screw at the top of the pressure rod nearly as tightly as possible.

2. The top feed should be exerting maxi- mum or nearly maximum pressure.

The top feed teeth must be aligned to mesh exactly with the teeth of the bottom feed dog. To align the teeth:

1. Loosen the allen screw at the rear of the top feed holder.

2. Turn the eccentric pin with a screw driver to adjust the position of the top feed arm so that the top feed and bottom feed dog teeth mesh.

The lift must be adjusted so that the movement of the top feed is synchronized with the movement of the bottom feed dog.To adjust lift:

A. Loosen the two Allen screws on the front of the lifter. Rotate the lifter to either advance or retard the top feed movement. Make sure that you do not shift the lifter sideways.;

Warning: This procedure requires trained personnel!

Are the feeds at their highest position?

Have screws 6 and cover plate 7 been removed?

Has screw 9 been removed and screw 10 turned until proper tilt is obtained?

Has screw 8 been tightened while pressing screw 10 to eliminate play in feed bars?

Has cover plate 7 and screws 6 been replaced?

Sign off on the feed tilt adjustment

Turn handwheel until needle is at its highest position. Check that the clearance between the point of needle 1 and the top of needle plate is correct as listed below. If this setting is incorrect, reset as follows.

2. Reset needle bar to correct clearance at its highest position.

3. Turn handwheel and observe that needle descends in the center of the needle hole in needle plate.