The breaker point contacts (301) and (223) should just touch when the armature (100) is 7/64" from the cores (107). To adjust, trip the armature from its contact with the cores, and insert a strip of metal 7/64" thick between the armature (100) and the face of the cores. Loosen the nuts (302) on the breaker point stem, (see Figure 18), and turn the upper nut until the contact (223) just touches the contact (301). Then set up the lower nut tight against the upper nut. As soon as adjustment has been made, be sure to remove the strip that you placed between armature and cores.
(See Figure 18)
The best results will he obtained if both contacts are renewed whenever one of them fails. If either contact fails it may leave the other in such uneven shape as to spoil a new contact.
To replace the moving contact (223):-Withdraw the moving parts (see Figure 17) and remove the old contact and its spring (176) from the breaker point plate by unscrewing the two nuts (302). Substitute the new moving con' tact, being careful to replace the felt washers (266 and 281) as shown in Figure 18.
Replace the nuts and the lock washers between them. After replacing the moving parts, adjust the breaker point contacts as explained under "Adjustments."
To replace fixed contact (301): Remove the front cover and the spring support (253) and withdraw the moving parts (see Figure 17). Disconnect condenser lead (S) and primary lead (217) from breaking point tube (158). Remove all nuts and washers from shank of the contact (301) and push contact down and out of tube. There are two insulating washers (168 and 184) inside of tube and these should be removed also.
New insulating washers (168 and 184) and new nuts will be supplied with each new fixed contact and these should always be used in replacements.
Place insulating washers on new contact and insert in tube, replace outside insulating washer, cover it with the large brass washer and lock washer and screw the nut up tight. Replace the two washers (240 and 238) and the nut (N). Insert the two leads and set the nut up tight. After replacing the moving parts, see that the contacts are in proper adjustment (see "Adjustments," page 45).