Figure 4-2. - Rear view of Model 225 machine showing oiling points.

W 155 sewing machine. Do not use too much oil; usually 1 drop of oil at each oiling point is sufficient. An excessive amount of oil will soil the project being sewn. We recommend a 10W mineral-base oil. (Use of castor-base oil is no longer required.) If this type of oil is not available through normal supply channels, use the mineral oil or Singer Type B or D.

TIMING THE 111 W 155 MACHINE

Timing is the most important step when you are working on any machine. As you read through the following timing and adjustment sequence, you may find that it has changed from steps you are accustomed to using. This timing and adjustment section is presented as if you are taking your machine completely apart and reassembling it.

1. Timing the arm shaft with the hook drive shaft

To perform this timing step, you must tilt the sewing machine back on its hinges. Turn the balance wheel toward the operator until the thread take-up lever reaches its highest point. You can do this step by placing the fingers of your left hand on top of the thread take-up lever and turning the balance wheel with your right hand. You should be able to feel the high point of