The Trailer Wheels Turn Too Slowly To Pull The Cargo

The problem of trailer wheels turning slowly and unable to pull cargo may be caused by low battery voltage, high connector resistance, and lack of lubricant in the drive head gearbox and bearings. 

When the trailer wheels turn slowly and cannot pull cargo, first check whether the battery voltage is too low, because insufficient voltage will reduce the speed of the drive wheel. In addition, excessive resistance at the connector may also be a reason, so you need to clean the connector and make sure its resistance is within the normal range. Lack of lubricant in the drive head gearbox and the connected bearings can also cause the wheels to turn sluggishly. Solutions to these problems include:

Check the load voltage to ensure that the battery voltage is within the normal range.
Clean the connector to reduce the resistance at the connector.
Check and add lubricant to ensure that the drive head gearbox and bearings are fully lubricated.