Ford Manual
Yes. If misfiring occurs when running at high speed, inspect the commutator. The surface of the circle
around which roller (see Cut No. 8) travels should be clean and smooth, so that the roller makes a perfect
contact at all points. If the roller fails to make a good contact on any one of the four contact points, its
corresponding cylinder will not fire. Clean these surfaces, if dirty. In case the fibre, contact points and
roller of the commutator are badly worn the most satisfactory remedy is to replace them with new parts.
The spring should be strong enough to make a firm contact against the roller points.
Misfiring may also be caused by short circuited commutator wires.
How is the Commutator removed?
Answer No. 65
Remove cotter pin from spark rod and detach latter from commutator. Loosen the cap screw which goes
through breather pipe on top of time gear cover. This will release the spring which holds the commutator
case in place and this part can be readily removed. Unscrew lock nut; withdraw steel brush cap and
remove the retaining pin. The brush can then be removed from the cam shaft.
When the Magneto gets out of order---what?
Answer No. 68
The Ford magneto is made of permanent magnets and there is very little likelihood of their ever losing
their strength, unless acted upon by some outside force. For instance, the attachment of a storage battery
to the magneto terminal will demagnetize the magnets. If anything like this happens, it is not advisable to
try to recharge them, but rather install a complete set of new magnets. The new magnets may be obtained
from the nearest Ford Dealer, placed on a board in identically the same manner as they should be when
installed on the flywheel. Great care should be taken in assembling the magnets and lining up the
magneto so that the faces of the magnets are separated from the surface of the coil spool just 1/32 of an
inch. To take out the old magnets, simply remove the cap screws and brass screws which hold them in
place. The magneto is often blamed when the trouble is a weak current caused by waste or other foreign
matter accumulating under the contact spring, which is held in place by the binding post on top of the
transmission cover. Remove the binding post and spring and replace after foreign substance has been
removed.
The Ford Transmission
What is the function of the Transmission?
Answer No. 69
