Final answer:
To install components onto a trailer, wheel-bearing grease is required for the wheel bearings and possibly the wheel hubs. Other materials like motor oil or water are not suitable substitutes for wheel-bearing grease. Always follow the manufacturer's guide for proper maintenance procedures.
Step-by-step explanation:
When preparing to install components onto a trailer, certain parts require the application of wheel-bearing grease to ensure proper lubrication and function. The components that must be packed or lubed with wheel-bearing grease typically include the wheel bearings, which allow the wheels to rotate smoothly on the axle, and sometimes the wheel hubs where the bearings reside. Properly greased wheel bearings can prevent excessive wear and heat, which can lead to breakdowns and failures on the road.
It is not common to use substances such as motor oil, lighter fluid, penetrating oils, or cooking oil for this task as these materials do not provide the necessary viscosity and protective qualities that are specific to wheel-bearing grease. Moreover, water should be avoided as it can cause rust and corrosion. A camera, while helpful for documentation purposes, is not related to the greasing process.
Remember to always refer to the manufacturer's guide or an experienced professional when performing maintenance tasks like this to ensure that you are using the correct materials and procedures for your specific trailer and wheel assembly.