The weight of the semitrailer and load is carried on two opposed
tapAered roller bearings in each hub. The bearing C ups are a
The bearing cones and roller assem-
pressed fit in the hubs.
blies arc removable for cleaning, inspection, and lubrication.
An adjusting nut with pin, a
The bearings are adjustable.
locking washer with holes to accommodate the pin of' the ad-
justing nut, and a jamnut secure the hub with bearings on
the spindle. A grease seal and wiper. are fitted on the spindle,
back of the inner bearing, to protect the brake linings from
B. Brake Drums.
(1) S e m i t r a i l e r
adapter is secured to the hub by 10 wheel studs and
.to the drum by 10 bolts, 7/16-inch lockwashers, and 7/16-
inch hex nuts. One of these bolts with lockwasher and
The inspection hole permits the brake lining clearance
A hub cap and gasket, fastened by
to be checked.