A. Coal oil should be used to clean and cut the dirt out of the pot and
from off the plunger, but after the dash pot and plunger have been
cleaned all oil should be wiped off of same, as the oil would cause the
plunger to collect dirt and stick.
51. Q. If one carbon of lamp should "jig or pound", what can be done to
stop it?
A. If the carbon jumps or pounds the electrode, it is evident that the
iron armature is too far out of the solenoid, or the speed is too low.
52. Q. Does the pounding of the lamp occur with the old series wound
machines or with the new compound wound machines?
A. The pounding of the lamp occurs with the new compound wound machines.