Wheels - Midland SIDE DUMP GRAVEL TRAILER Operator's Manual

5.2.6

WHEELS

A variety of steel or aluminum wheels can be used
on the trailer depending on customer preference
or application requirements. Wheels must be
maintained in good condition and all fasteners
tightened to their specified torque level to obtain the
expected life and performance.
Loose fasteners are the most common cause
of wheel problems on a trailer. Always retorque
the wheel fasteners per the break-in schedule of
100, 500, 1500 and 5,000 miles (160, 800, 2500
and 8000 km) when the unit is new and after a
wheel has been removed. Always use an accurate
or calibrated torque wrench when tightening
fasteners. A loose fastener is defined as one that
is not tightened to its specified torque. A loose
fastener does not provide the required clamping,
anchoring or holding forces to stabilize the adjacent
components. Insufficient clamping forces can lead
to flexing, bending, cracking, hole elongation or other
component deterioration that cause failures and/
or accidents. Always keep fasteners tightened to
their specified torque. Over-torquing can overload
certain components, causing compression cracks
and strip nuts or studs. Over-torquing fasteners can
be as detrimental as under-torquing. Always tighten
fasteners to their specified torque.
Use an accurate torque wrench to retorque wheel
fasteners every 10,000 miles (15,000 km) or monthly
whichever comes first. Always retorque wheels per
the break-in schedule whenever a wheel is removed
and remounted.
Always follow the recommended mounting procedure
when installing wheels to the trailer.
6 Stud
STUD PILOTED
Fig. 51 NUT TORQUE SEQUENCE
1. Disc Wheels (Stud Pilot Style):
a. Mount single or inner dual wheel on hub. Be
b. Snug the nuts up in the alternating sequence
c. Tighten nuts to their specified torque using
d. Mount outer dual. Do not damage the
e. Snug up the nuts in the alternating sequence
f.
Table 5 Recommended Wheel Stud Torque
10 Stud
careful not to damage the threads on any of
the studs.
shown to center it on the hub and insure an
even contact between the wheel and hub.
the same alternating sequence.
IMPORTANT
Left-hand threads are used on the left
side of the vehicle. Right-hand threads
on right.
threads when sliding the wheel over the
studs.
shown to center it on the hub and to provide
even contact.
Tighten the outer wheel nuts to their specified
torque
IMPORTANT
When retorquing inner nuts of double nut
design, always back off outer nut several
turns, then retorque them.
(Disc Wheels)
Wheel Type
Stud Size
Disc
3/4"-16
Disc
1-1/8"-16
Disc
15/16-12
Disc
1-5/16-12
Bud Unimount 10
WHD-8
Ft-lbs
Torque (Dry)
450 - 500
450 - 500
750 - 900
750 - 900
390 - 440
400 - 600
55