Caution, Wheel bearings are clean and free of moisture, Wheel locks are easy to engage – Invacare XtraTM 1026793 User Manual

Page 24: Inspect tires/casters for flat spots and wear, M warning, Clean quick-release axles with a teflon® lubricant, Ensure axles are free from dirt, lint, etc, Adjust wheel locks as tires wear, Clean and wax all parts, Clean upholstery and armrests