Komatsu WA320-5H Operation & Maintenance Manual page 218

MAINTENANCE
CHECK INFLATION PRESSURE OF TIRES
When inflating a tire, check that no one will enter the work-
ing area. Use an air chuck which has a clip and which can
be fixed to the air valve.
While inflating the tire, check the inflation pressure occa-
sionally so that it will not rise too high.
If the rim is not fitted normally, it may be broken and scat-
tered while the tire is inflated. To ensure safety, place a
guard around the tire and do not work in front of the rim
but work on the tread side of the tire.
Abnormal drop of inflation pressure and abnormal fitting
of the rim indicate trouble in the tire or rim. In this case, be
sure to ask a tire repair shop to carry out repairs.
Be sure to observe the specified inflation pressure.
Do not adjust the inflation pressure of the tires just after
high-speed travel or heavy-duty work.
Check
Measure the inflation pressure with a tire pressure gauge while the tires are cool before starting work.
Inflation of tires
Adjust the inflation pressure properly.
When inflating a tire, use an air chuck which can be fixed to the air valve of the tire as shown in the figure. Do not
work in front of the rim but work on the tread side of the tire.
The proper inflation pressure is shown below.
Tire size
Standard 20.5-25-12PR
NOTICE
The optimum inflation pressure differs according to the type of work. For details, see "HANDLING THE
TIRES (3-99)" .
WARNING
Inflation pressure
Front tire: 0.32 MPa (3.3 kgf/cm2, 46.9 PSI)
Rear tire: 0.27 MPa (2.8 kgf/cm2, 39.8 PSI)
SERVICE PROCEDURE
4-37