User's Manual

49
Date of Origin – 02/01/08
PRECAUTIONARY NOTES:
Keep unnecessary personnel away when raising and lowering trailer and changing tires.
Do not climb under a raised trailer.
Do not leave a raised trailer unattended.
Avoid raising a loaded trailer whenever possible.
1. Position trailer on a level, hard surface capable of supporting the total vehicle weight
and lifting equipment.
2. Set brakes and block wheels at other locations to prevent movement.
3. If a loaded trailer must be raised for changing tires, take appropriate precautions to
reduce risk of tipping, load shifting, or structural damage. If necessary, use two lifting
devices and raise both sides of the trailer evenly to prevent leaning and tipping.
4. Position the jacks or lifting devices under the axle, as close to the outer end as pos-
sible. Use care to avoid placement that will cause contact and damage to other com-
ponents such as brake chambers, cam shafts, U-bolts, and slack adjusters.
5. Raise the trailer at a slow, steady rate until the tires to be removed are off the ground. If
using two lifting devices, raise both sides of the trailer evenly to avoid leaning and
tipping.
6. Position trailer supports under trailer frame or axle to prevent unexpected lowering of
the trailer.
7. Remove the nuts securing the tires and remove the tire(s) using a tire fork or similar
device to lift the tire(s).
8. Install the replacement tire(s). Refer to the appropriate section of the Owner’s Manual
for specific instructions for wheel installation.
9. Torque the securing nuts to 450 to 500 ft. lbs. (dry)
10. Remove trailer supports
11. Lower the trailer to the ground at a slow, steady rate. If two lifting devices are used,
lower both sides evenly to avoid leaning and tipping.
Watch for pinch points to ensure no electrical or pneumatic lines will be damaged.
12. Remove lifting devices and check wheel nuts to ensure they are torqued to the speci-
fied values.
13. Inspect suspension components for damage or improper adjustment resulting from
raising and lowering the trailer. Repair any damaged components as necessary.
14. Remove blocks from wheels.
TIRE CHANGE PROCEDURE
WARNING
!
1. Read and understand this warning and the installation, Service and Safety Instruction Manual to
understand all safety precautions, proper operation, and maintenance of your Webb hub. Failure to do
so could result in death or serious injury and could result in a compromise of your vehicle’s safe
operation through loss or failure of a wheel or the compromise of the braking system. Copies of the
installation, Service and Safety Instruction Manual are available, free of charge, from Webb Products,
Inc., upon request.
2. Always use a properly installed calibrated torque wrench to assure proper torque. Under torque and over
torque can cause thread and/or nut damage and could result in the loss of a wheel. Failure to ensure proper
torque could result in death or serious injury and could shorten the expected life of this product.
3. Recheck torque after the first 50 to 100 miles of service. Parts may seat naturally, causing the torque to drop.
A drop in torque could result in the loss of a wheel. Proper torque is essential to avoid damage or compromise
of your vehicles safety. Failure to ensure proper torque could result in death or serious injury.
2310 INDUSTRIAL DRIVE, S.W.
CULLMAN, ALABAMA 35055
256-739-6660 WWW.WEBBWHEEL.COM
HUBS
(FOR PILOT MOUNTED DISC WHEELS)
8 - 10 STUD HUBS
APPLIES TO M22 X 1.5 STUDS / TWO PIECE FLANGE NUT.
All threads are right hand metric.
Tighten Flange Nuts to 50 ft.lb. using sequence
shown.
Check Disc-Wheels for proper positioning on pads
and proper seating against flange.
Tighten Flange Nuts to recommended torque using
sequence shown.
RECOMMENDED TORQUE: 450 - 500 FT. LBS.