Table V. Wheel-mounting Pressures in Tons
*Nominal wheel seat diameters of AAR axles.
Note. No tolerances permitted below minimum or above maximum pressures shown.
a. Protecting axle journals. The highly polished surfaces of journals should be protected during the wheel-
mounting operation. Guards should be placed over them and, when possible, fitted so that the dust guard collar
is also covered. To prevent the guards from nicking or scratching the journal, they should be made of softer
material than the axle or lined with soft materials.
b. Cleaning and lubricating. All injurious material, such as rust, grit, chips, and grease, should be removed
from the wheel bores and wheel seats before the mounting operation begins. Both wheel seats and wheel bores
should be coated with a lubricant consisting of a mixture of basic carbonate white lead and boiled, not raw,
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