Hobart dishwasher final rinse arm does not rotate properly; water sprays in one direction only.

Safety first: Turn off power and allow the machine to cool before removing rinse arms.

• Remove and clean arm: Take off the final rinse arm and clean all jets and internal passages with a brush and descaling solution.
• Descale hub and spindle: Remove mineral deposits from the arm hub and spindle so the arm can spin freely.
• Check for wear: Inspect bushings or bearings for oval wear or cracking. Replace if the arm wobbles or binds.
• Verify clearance: Ensure the arm does not contact racks or tank walls when reinstalled. Adjust rack guides if necessary.
• Test rotation: Spin the arm by hand; it should rotate smoothly with minimal resistance.