Bri-Mar DT508LP, Owner'S Manual

Page: 143 / 146

Inspection, Service and Maintenance
Bri-Mar 137
^ W
ARNING
Metal creep between the wheel rim and lug nuts (bolts) may cause rim to
loosen.
Death or injury can occur if wheel comes off.
Tighten lug nuts (bolts) before each tow.
•
Tighten the lug nuts to the proper tightness to prevent wheels from
coming loose. Refer to the steps that follow and the axle
manufacturer’s information. Use a calibrated torque wrench to
tighten the lug nuts. Over-tightening may result in breaking the
studs or permanently deforming the mounting stud holes in the
wheels.
•
Remove all excess paint, oil and grease from mounting surfaces.
•
Start all lug nuts by hand to prevent cross threading.
•
Tighten lug nuts in the sequence shown in figure 8-4.
•
Tighten lug nuts in stages as shown in figure 8-5.
•
Check and retorque after the first 10, 25 and 50 miles of driving and
before each tow thereafter.
Figure 8-4 – Wheel Torque Sequence
Steel Wheel Torque Requirements
Wheel
Size
1
st
Stage 2
nd
Stage 3
rd
Stage
14 inch 20-25 lb ft 50-60 lb ft 90-120 lb ft
15 inch 20-25 lb ft 50-60 lb ft 90-120 lb ft
16 inch 20-25 lb ft 50-60 lb ft 90-120 lb ft
Figure 8-5 – Wheel Torque Requirements
Trailers