This video provides step-by-step instructions for replacing the upper spray arm on Whirlpool dishwasher model #WDF550SAFS. The most common reason for replacing the spray arm is if the dishes are not being cleaned properly.
All of the information in this wash armvideo is applicable to the following brands: Whirlpool
Tools used: phillips head screwdriver
To replace the upper spray arm in your dishwasher, pull out the upper dish rack. and rotate the locking nut counter-clockwise to remove the old arm
Install the new upper spray arm by aligning it on the manifold then rotate the locking nut clockwise to secure.
Confirm that the arm spins freely and your dishwasher should be ready for use.