Load and Carry Operations
Maintaining optimum inflation pressure in front axle
loader tires is extremely important in preventing casing
fatigue conditions. Inflation must be matched to the
load and operating conditions of the loader and maintained
at that level to prevent overdeflection. Overdeflection
is caused by underinflation, overloading or a combination
of both. This condition may weaken and break body cords
creating flex breaks or casing break-up.
Bridgestone/Firestone Off Road Tire Company policy is
to reduce rated tire carrying capacity by 20% when tires
are used for load and carry. We recommend that the front
axle tire pressure be increased 15 psi higher than the
rated inflation pressure with no increase in load carrying
Normal Use - Dig, Load and Cleanup
We recommend that the front tire air pressure be increased
up to 15 psi higher than the rated inflation pressure.
In normal use a good "rule of thumb" to use
is as follows:
23.5-25 Increase ~ 5 psi higher than rated
Through 29.5-29 Increase ~ 10 psi higher than rated
Larger Sizes Increase ~ 15 psi higher than rated
example in a normal use operation you may recommend
a 5 psi increase on a 23.5-25. However, if in normal
use overdeflection is occurring with the 5 psi increase,
then recommend a 10 to 15 psi increase on that 23.5-25.
1. If front tires are running at 15 psi higher
than rated air pressures, and casing fatigue removals
are occurring, then the tires are running beyond their
design limits. Running tires beyond their design limits
automatically voids the tire warranty. A higher ply
rated tire may be required.
2. Be sure valve hardware, rims, and "O"
rings are satisfactory for the increase in pressure.
3. Before inflating beyond 15 psi higher than
rated, please consult with BFOR engineering.
you have any other questions concerning loader tire
inflation or maintenance, contact your local Bridgestone/Firestone
Off Road Tire representative, TIREX,