Approx 30% of kitchen faucets in America are made by Delta, so we'll start there.

turn off hot & cold shut off valves under the sink turn the faucet on to make sure the shut off valves work use an allen or hex head wrench to loosen the Handle w/ Set Screw [RP2393 on below photo] & pull handle off using slip joint pliers, turn Cap w/ Adjusting Ring [RP50] counter clockwise remove Cam & Packing (RP61) & Ball Assembly (RP70), pay attention to the slot on the right side of the ball, you will have to line up the new ball the same way look into the faucet body & locate Seats & Springs (RP4993) using the hooked part of the allen tool or a screw driver. pry out both the washers & springs. pay attention to the position of the springs & the way the washers rest on them grab the Spout (RP5654) w/ both hands & pull it off the faucet body to expose two O-Rings (RP25) using an allen tool or a screwdriver remove the two O-Rings. pry them out of the grooves. install the new O-rings in the same grooves & apply plumbers grease or vaseline to surface of the O-rings put the Spout back on faucet body, turn it left & right checking for ease of operation. using the screwdriver or allen tool, put the spring /washer combo together w/ your finger & lower into the faucet body install the Ball Assembly (RP70) into the faucet body. line up the slot on the right hand side of the ball put the black packing & white cam on top of the ball. line up the slot on the left side of the faucet body. apply teflon paste to threads, then install Cap. hand tighten clockwise & use slip joint pliers to tighten 1/4 turn past tight install handle. tighten allen set screw w/ allen wrench remove Aerator (RP330) from end of spout, then turn on shut off valves under sink & check for leaks. run water through faucet for 30 seconds, then reinstall Aerator lastly , "Good luck & use the force, Luke" :)

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