FREQUENTLY ASKED QUESTIONS

1. How can you operate tires at lower pressures without causing tire
damage?

    The tires are set at pressures to match the load and speed of the vehicle. High tire pressures are only required when travelling at highway speeds with a full load to prevent tire overheating. When travelling with an empty vehicle or at reduced speeds, you can safely run with less pressure in the tires while still maintaining appropriate tire-side wall deflection.

2. How will tire life be affected?
    By maintaining proper tire pressure for the operating conditions, tire life will not be compromised. Industry users have realized reductions in overall tire costs of 25% to 30% in moderate use applications. Severe use applications, such as log hauling, have realized more significant savings.

3. How long does it take to inflate tires?
    The vehicle air supply system is designed to inflate all of the tires within six to eight minutes when going through the typical stages of reinflation. This is well within the recommendations set by the tire companies to prevent tire overheating.

4. Why would you want to run at lower tire pressures when empty?
    Pot-hole and wash-board damage to roads result from an empty vehicle bouncing on the road surface. By reducing the tire pressure, creating a softer ride, road surface damage is minimized. In addition, vehicle damage is decreased and the reduced driver bounce results in less driver fatigue and safer operation of the vehicle.

5. What do the tire companies think of running with reduced pressures?
    Tire companies support the concepts of Variable Tire Pressures provided they are controlled by suitable Tire Pressure Control systems, such as TIREBOSS. Approvals have been received from major tire companies for various industry applications.

6. How is fuel economy affected?
    By operating with the correct tire pressure for the load and roads being travelled, a 3% to 4% improvement in fuel economy can be achieved.
7. Does the system operate in cold weather?
    The system incorporates heaters and a good drying system must be used. It is designed to operate in cold temperatures as experienced during our harsh Canadian winter conditions.
8. How often will the external drive hoses be damaged?
    To our knowledge, there has never been any damage to the external hoses on vehicles while travelling on public roads. This technology has been in use on a fleet within the Saskatchewan petroleum industry for over eight years. To date this fleet has accumulated over 12,000,000 kms without any damage to the external hoses while travelling on public roads. Even in a severe use application, such as log hauling, the average occurrence of drive axle hardware breakage is rare and then only when the vehicle is being loaded or unloaded. The operator is immediately warned by computer of the occurrence and can easily isolate the damage and make repairs.

9. How long will the wheel rotary unions last?
    In a moderate use application, rotary unions last between 250,000 kms to 500,000 kms on drive wheels and over 1,000,000 kms on trailer wheels.

10. How dependable are the systems?
    The systems have been used commercially since 1992, mostly in severe use applications such as forestry. The systems are easily transferable and some are on their fourth vehicle. The system is designed to offer 10 to 15 years of reliable service and is extremely durable.
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