Final answer:
The total travel on a nonserviceable hub refers to the movement or displacement of the parts within the hub. It should not exceed .004" to ensure proper functioning.
Step-by-step explanation:
In the context of a nonserviceable hub, the term 'total travel' refers to the amount of movement or displacement of the parts that make up the hub. When it is stated that the total travel on a nonserviceable hub is .004" or less, it means that the parts within the hub should not move or displace more than .004". If the total travel exceeds this value, it may indicate a problem or wear in the hub.
For example, if the total travel on a nonserviceable hub is .003", it means that the parts within the hub can move up to .003" but no more. This specification ensures that the hub remains stable and properly functions.