Assembling a rollator walker typically involves the following steps: 

• Lay out all the parts: Before you start assembling your walker, make sure you have all the parts and hardware you need. This usually includes the frame, wheels, brakes, handlebars, and any accessories you’ve purchased. 
• Attach the wheels: Attach the wheels to the frame, making sure they are securely fastened. Some walkers use quick-release levers to attach the wheels, while others may require bolts or screws. 
• Attach the handlebars: Attach the handlebars to the frame, making sure they are securely fastened and adjusted to the proper height for your comfort. 
• Attach the brakes: Attach the brakes to the handlebars, making sure they are securely fastened and adjusted to the proper height for your comfort. 
• Adjust the height: Adjust the height of the handlebars to your preference, making sure they are at a comfortable height for you to walk with the walker. 
• Test the walker: Test the walker to make sure it is stable, secure, and moves smoothly. Adjust any parts that need it, such as the brakes or handlebars, until the walker is working properly. 
• Add accessories: If you have any accessories, such as a basket or tray, attach them to the walker. 

It is important to follow the manufacturer’s instructions carefully and to use the hardware and tools provided to ensure the walker is assembled correctly and safely. If you have any difficulty with the assembly process, or if any parts are missing or damaged, contact the manufacturer for assistance.