TIRE MAINTENANCE MANUAL - Goodyear Off-The-Road (OTR)

Inflation pressure recommendations vary
with the type of service. The type of service
also determines the operating speeds:
• Haulage units (earthmoving, mining,
logging, etc.): 30 MPH/50 KPH
maximum speed.
• Dozer/loader units (shovels, mining
cars, loaders, etc.): 5 MPH/10 KPH
maximum speed.
• Road graders: 25 MPH/40 KPH
maximum speed.
Special service conditions also impose
speed limits based on tire load and construction.
These special applications include
compactor, sand, straddle carriers,
driveaway and intermittent highway use.
Load and inflation tables for all types of
service are in the back of this book.
Essential Parts of a Sound Inflation
Maintenance Program
1) Cold inflation checks and adjustments
should be made once a week. Hot
checks should be made daily.
2) Never bleed air from a hot tire to correct
pressure. Normal equipment operation
causes inflation pressure to
increase. A hot pressure increase up to
20% is acceptable.
If excessive pressure is present, find and
fix the cause. Bleeding air will result in
serious underinflation and tire damage.
3) Record inflation pressure every time it
is checked. Records provide information
that can be used to detect problems
and schedule preventive maintenance.
4) Accurate pressure gauges must be used.
Service gauges must be calibrated with
a master gauge once a week.
5) Before placing pressure gauge on valve:
• Clean any dust, dirt, grease or other
matter from tip of valve stem.
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• Press the valve core briefly and release
a small quantity of air.
This cleaning procedure will help assure an
accurate reading and prevent damage to
the gauge.
6) Use a valve cap on every valve. It acts as
the primary air seal. It also helps to prevent
dirt, dust and water damage to the
core.
7) Check spuds, stems and extensions. Be
sure all joints are tight and secure to
avoid leaks in service.
8) Use valve extensions or hosing for easy
access for inflation checks.
9) Compressors:
• Must have a minimum, capacity of
150 PSI (10.0 Bar).
• Compressors must have water trap
assemblies to prevent moisture inside
tires.
• Moisture can:
– rust rim parts.
– plug valve stems with rust from
rims or ice crystals.
– reduce pressure gauge life and
accuracy.
– complicate dismounting procedures.
10) Use a new, correctly sized O-ring each
time a tire is changed. Use a new
grommet on tubeless spuds.
11) Thoroughly clean rims and rim parts
before mounting tires. Wire brush: