Great Dane 42101401 - Manual (Page 19)

STUD HOLE CRACKS
Hub or outboard drum may be damaged or broken.
Must provide flat backup.
Double-capnut wheel mounting
preload is force applied to
the disc by torquing nuts.
Inner cap nut must be tightened
before tightening outer nut.
This surface should be
convex, not concave.
Cause: Loose cap nuts or insufficient preload due to
damaged threads or improper torquing or by worn out
nuts.
WHEEL CRACKS
Handhole to handhole.
Handhole to studhole.
Handhole to rim.
Causes: Overloading.
Studhole to studhole.
Causes: Loose cap
nuts.(Also see
chamber problems).
TIRE CARE
PROPER INFLATION
Inspect trailer tires thoroughly and often, paying special
attention to inflation. Always use a reliable tire pressure
gauge. Always check when the tire is cool, inflating to
the recommended pressure for the maximum load to
be carried but not exceeding the pressure limit molded
into the tire and the rim or wheel rating. Always use
valve stem caps to keep a tight air seal and keep out
dirt and moisture.
Even with proper inflation, radial tires tend to show a
sidewall bulge normally associated with under inflation.
After mounting a new tire, recheck inflation pressure
after 48 hours.
Inflation pressure increases during normal operation as
tire temperature increases, often as much as 10 to 15
psi. Higher pressure may be a sign of overloading,
under inflation, excessive speed, improper tire size, or
a combination of these factors. Determine the cause of
any abnormal air pressure increase and correct it.
UNDER INFLATION is a tire’s greatest enemy. Check
tires with an accurate gauge before each trip and at
least once a week.
Crack originating from
thin edge of bolt hole.
Cause: Damaged or
worn out chamfers.
Nut side.
Chamfer flared by nut.
Hex nut imprint.
Worn out nut.
Backup
area
chafed.
Chamfer extruded on side
opposite nut.
Cause: Too much torque
or improper nut.
DANGER Always inflate tires in a safety cage.
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