Step1: Turn off power and fully depressurize equipment for safety.
Step2: Remove old pressure gauge using appropriate wrench carefully.
Step3: Clean threaded port thoroughly and inspect sealing surface.
Step4: Apply thread sealant or PTFE tape evenly on threads.
Step5: Install new gauge by hand, then tighten securely with wrench.
Step6: Align dial upright position for easy readability.
Step7: Restore pressure slowly and check carefully for leaks.
Step8: Verify accurate readings and ensure stable operation after startup.