This part also acts as a index detente release. I wanted to spend a minute on this hub assembly that holds the index rachet in place and that the left platen knob attaches to. This part is really the only potentially troublesome part of the whole process. Then the actual index rachet assembly would fall apart and you would be in trouble.Ĭlose up shot of the hub assembly for the index assembly You can see why I stressed not pulling the hub assembly all the way out of the machine. Take a good look at the index assembly on the left side of the carriage. Hold left hub firmly, lift up platen, twist and pull to right Slowly twist the platen and slide out to the right. Hold the hub sticking out of the left end of the carriage firmly and then lift up the right end of the platen. Now we can lift the platen out of the machine. Pulling the right platen knob removes the shaft Grab the right platen knob and gently twist and pull until the entire shaft comes out of the machine. Removing the two set screws from right side of platen Magnetizing the screwdriver will assure this. They are small so take care not to lose them. These two set screws are located on the right end of the platen on the collar (just inside the frame of the right carriage end). The right platen knob stays attached to the shaft because that's how we pull the shaft out of the machine. Next we will remove to two set screws that hold the shaft to the platen. Now, gently push the carriage across the machine to the left margin. If you pull the hub completely out, you are in trouble. Next, grab hold of the hub that the knob was on and slowly twist and pull out only about 3/4 of an inch. Next, remove the left platen knob by removing the screw with locking washer and the platen knob will pull off the shaft. The platen should spin freely without clicking. Disable the index mechanism by moving the linespace lever to to dot mark above the one linespace. Move the margins out to the ends of the carriage. This is a huge help for putting the set screws back in place. The screwdriver also acts as a screw starter. Rub the tip of the screwdriver on a magnet.
Your first tip if you can, is to magnetize the screwdriver. The only tool you will need is a flat head screwdriver with a skinny blade. In fact, it can be, but if you follow this lesson you will see that it's easier than you thought. Maybe you have even thought of replacing the platen but it looked like a complicated procedure. It's more petrified rock than rubber roller. Those of you lucky enough to own a Hermes 3000 probably already know that the platen on a 3000 is one of the hardest known substances on the planet.
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