Figure 4-5. Shattered rim.
Figure 4-4. Burnt rim.
important that they be detected in their early stages.
Figure 4-14(1) shows a typical plate crack that has not
extended into the rim section. Figure 4-14(2) shows a
crack from the plate through the rim.
o. Hole in Wheel. Wheels with holes in the plate
or showing evidence
of the application
torch or electric arc are condemnable and must be
withdrawn from service.
p. Wheels Loose or Out of Gage
(1) Wheels must be removed from service if
they show indications of being loose on the axle. This is
usually indicated by oil on the plate of the wheel,
presumably having seeped through from the journal box.
Loose wheels do not always have indications of oil
seepage on the back plate. It is also important to watch
Figure 4-6. Spread rim.
for evidence of any wheel movement on the axle wheel
seat. Oil on the back plate is sufficient reason for
q. Overheated Wheels. Wheels which become
removing the wheels from a car even though they may
overheated due to stuck or dragging brakes and which
not always be loose.
show any one or a combination of the following evidences
of severe overheating must be withdrawn from service.
(2) Wheels in service which have gage
measurement of less than 53 inches or more than 53 3/8
for method of gaging wheels.).