This oil mist lubricates the top bearing (4).

The pulley (7) is provided above the top bearing (4).

Extension ladders are too long for a job if it extends more than 3 ft beyond the upper support point.

A step ladder is too long if it extends more than three feet above the maximum standing point.

Likewise, an Extension Ladder is too long if the ladder extends more than three (3) feet beyond the upper support point.

An extension ladder is too tall if it extends more than 3 feet beyond the upper support point.

Likewise, an Extension Ladder is too long if the ladder extends more than 3 feet beyond the upper support point.

In the event of an oil leak at the top bearing (4), there is no danger of oil reaching the driving belt (6), since the force of gravity causes the leaking oil to flow down to the bottom of the housing (3).