A
wheel moves because of the axle, and the wheel hub connects both
parts to make the system fully functional. Your trailer’s wheel
hubs are as important as the wheels themselves, and therefore
requires the same maintenance. Failing to do so might cause
difficulty in steering or result in a broken axle.
The
wheel hub has studs that corresponds to the number of holes, or lug
bolts of the wheel, which makes it possible for the hub to connect it
to the axle. On either side of the wheel hubs are bearings, both
inner and outer, which are basically cylindrical pieces packed with
grease to reduce friction. It’s important, therefore, to keep the
wheel hub adequately lubricated to avoid excessive heat due to
friction, and this is where a grease cap, or a dust cap, comes in. It
keeps the grease in and dust out, because dust and water can impede
the performance of a wheel hub.
In
replacing
a wheel hub, count the number of studs or lug bolts on one wheel,
which can be as many as four to five bolts per wheel. If the wheel
has even-numbered studs, you can start measuring the distance between
two opposite bolts. If the wheel has five studs, however, measure the
distance between two opposite bolts (disregarding the bolt that will
come in between) and multiply the measurement by 1.0515.
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