How do tag axles work?
A tag axle is a third axle located behind the rear drive axle of a motor home. It is a non-drive axle with one or two tires on each side. The main purpose of a tag axle is to increase the support of the chassis at the rear of the vehicle, allowing for greater carrying capacity and shock resistance.
Why do buses have tag axles?
The tag axle is just intended to carry a little weight. It is not driven. The tag axles can be lifted, and in later coaches (45′) the air was dumped from the tag axle air bags to make turning a little easier and to minimize the sidways scuffing when the steering wheels were turned to the extreme.
What does tag dump mean?
The TAG DUMP switch allows an operator to exhaust the air bags on the tag axle which, under certain conditions, may improve manueverability. In AUTO mode, the tag axle air bags will automatically deflate when in reverse and when the speed of the vehicle is less than 8 mph.
Do lift axles have brakes?
Question 1: Do retractable or lift axles have to be equipped with brakes? Guidance: Yes, when the wheels are in contact with the roadway.
How much weight can a tag axle carry?
In addition to Bridge Formula weight limits, Federal law states that single axles are limited to 20,000 pounds, and axles spaced more than 40 inches and not more than 96 inches apart (tandem axles) are limited to 34,000 pounds. Gross vehicle weight is limited to 80,000 pounds (23 U.S.C. 127).
When should you use a drop axle?
The Low-Down on Drop Axles
Lower deck height means easier loading and unloading. This is mainly used for enclosed trailers and applications like car haulers or low-deck trailers, where low ground clearance loading is needed.
What is the point of a lift axle?
Lift axles are auxiliary axles that are added to a truck to increase its weight carrying capacity.