Equipment Explained:

Aerial Lift Oscillating Axles 

 

Many boom-supported mobile elevating work platforms, also known as aerial lifts or boom lifts, are equipped with an oscillating axle lock system. This feature is an asset to the stability of the machine when traveling on uneven/rough terrain and when rotating the boom. The picture below shows the plunger valve and strike plate that is connected to the oscillating axle system on this particular model.

 

The oscillating axle system works in two ways; first it allows the axle to pivot (or oscillate) during travel on uneven ground with the platform in the standard travel position (centered over the end); secondly it creates increased stability by locking the axle so it cannot pivot when the boom is rotated away from the standard travel position. Unfortunately this simple feature may not be known or is overlooked by operators and maintenance staff. An improperly working oscillating axle lock system creates an unsafe aerial lift and it must be corrected before further use.

 

In order to make sure this safeguard is working and for platform capacity to remain accurate, the oscillating axle lock system should be checked periodically by a qualified person. Refer to the equipment manufacturer's instructions on how to perform this periodic check. Beyond that, operators should be trained how to safely use the aerial lift and be aware of how the oscillating axle lock system works.

 

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As a general guideline, hard hats should be replaced every 5 years of service, despite its outward appearance. For hats exposed to higher temperatures, extreme sunlight, harsh chemicals or other adverse conditions, replacement is suggested for every 2 years.