There are a variety of different keyboard layouts for different classes of work, but no great variation from the standard layout is advisable.
TO REMOVE THE KEYBOARD CAM FRAMES
Be sure the keyrods are connected to the verges on the models 1, 2, 3, 4, or 5. On the models 1, 2, or 3 the keyboard should not be locked with the locking bar.
Take off the cover pans and the cover tray, remove the two screws that extend through the rubber roll shaft bracket, pull the frame off dowel pins.
CLEANING THE KEYBOARD CAMS
Whenever the keyboard cams become dirty and several of them are causing trouble, the entire set should be removed from the frame and cleaned. Do not take the entire set off, however, every time a cam fails to act. If there are but a few cams bothering, it is much quicker to take out these individual cams and clean them.
The entire set of cams will usually need cleaning and oiling every three or four months in the average shop. Due to some particular shop surroundings, this time often varies.
To clean the cams, remove the keyboard cam frames from the machine; take out the rubber rolls, assembled; release the pivot end of the cam yokes and remove the cams. The sides of the cam yokes at each end and the outer surface of the cam should be thoroughly cleaned. Dry the cam by wiping with a lintless rag and blowing with an air hose or bellows. The triggers should then be removed and cleaned. While the cams and triggers are out of the frame, the frame should be washed clean. Gasoline or denatured alcohol should be used for washing and cleaning the various parts. A jeweler’s brush will be found useful in cleaning the various parts.
Before replacing the triggers, polish them with graphite and string them on a pivot wire to make sure that no dirt nor grit has gotten into the pivot holes during the cleaning.
Clean the rubber rolls before replacing them.