Page 45
TT-316 Curtis AC System Operator Manual
TT-316-07
Tire Tread Wear
It is important to periodically inspect the tread on each tire for wear. Driving with
inadequate tread increases the risk of losing control of the vehicle
due to hydroplaning on a wet road surface. It also increases the
risk of a flat tire due to road debris. Extreme tire wear can result in
sudden tire failure and loss of control of the vehicle.
Refer to the maintenance schedule in this manual for the
recommended tire inspection interval.
Minimum recommended tread depth is 1/16 inch (1.5 mm). There
are a series of tread depth wear indicators around the circumference
of the tire. They will appear as 1/2 inch (13 mm) bands across the
tread as the tire approaches its wear limit (see illustration). The tire should be replaced if any tread
depth indicator can be seen or any part of the tread depth is 1/16 inch or less.
Changing a Tire/Wheel assembly
Note: A spare tire, jack, or lug wrench is not attached to the vehicle.
6. Loosen the wheel nuts (do not remove) before raising the tire off of the ground.
7. Raise the tire to be changed off of the ground and support with a jack stand.
8. Remove the wheel nuts and tire/wheel assembly.
9. Install the replacement tire/wheel assembly.
10. Install the wheel nuts and cross tighten per illustration to 85 foot pounds (115 Nm).
11.
Check the tire for proper inflation.
12. Lower the vehicle to the ground and remove the blocks from the wheels.
13.
Wheel nuts should be checked for tightness after first 10 hours of operation.
1) Park the vehicle on a hard level surface off of any main road or highway.
2) Make sure the Start switch is in the OFF position, then remove the key.
3) Place the Direction Control switch in the center OFF position.
4) Set the park brake.
5) Block the wheels on the opposite side of the tire to be changed.
WARNING
When lifting the vehicle, always use a hoist with lifting strap, or a jack of adequate
capacity. Use jack stands to support the vehicle before starting any repairs. Failure to
use lifting and support devices of rated load capacity may result in severe bodily injury.
WARNING
If you have a flat tire while driving your vehicle, it is highly recommended that you slowly
and carefully drive the vehicle off of any main road or highway before attempting to
change the tire. Attempting to change a tire on a main road or highway exposes you to
extreme danger of being run over by other vehicles.
WARNING
DO NOT operate a vehicle if the cord is visible on any tire (see
illustration). A tire in this condition may suddenly fail at any time
resulting in loss of control of the vehicle.
WARNING
