How to install hot/cold stem 3z-6h/c

check that the stem was in the central position before the handle was installed

Put the large part of the spring into the plastic or rubber washer first, then insert into faucet. I use a little of petrolem jelly for easy instlation.

1. • Test the dripping water with your hand to make sure that it is the hot water side that is leaking. Lay a rag over the sink drain to keep parts from falling down it. Locate the hot and cold shutoff valves under the sink and turn the knobs clockwise by hand until they close. If the knobs remain stiff, use a pair of pliers to gently turn them until the knob begins to move, then finish turning by hand.
     
   • 2
     Pry the decorative cap off the faucet top with a small thin, flat-head screwdriver. Remove the cap that has the "H" letter on it. Depending upon the handle screw configuration, use a flat-head or Phillips-head screwdriver to remove the handle screw. Gently pry up on the handle from all angles and pull it up and off the splines of the stem.
     
   • 3
     Use a crescent wrench to turn the hot water stem nut counterclockwise until it comes completely off the stem shaft. Wiggle the stem with your fingers and pull it out of the faucet. If the washer on the bottom of the stem is deformed, it indicates the source of the leak. However, remove the old seat from the faucet base with an Allen wrench or a seat removal tool.
     
   • 4
     Wipe out the inside of the seat housing with a rag. Replace the seat with the new one included in the repair package, using an Allen wrench or seat removal tool.
     
   • 5
     Place the new hot water stem shaft into the valve seat, and start the stem nut in by hand, turning it clockwise. Finish tightening the stem nut with the crescent wrench, but only to a moderate firmness -- do not over-tighten it. Place the handle back over the stem shaft and tap it down until it seats firmly. Replace the handle screw and tighten it with a screwdriver.
     
   • 6
     Turn the hot and cold water supply knobs counterclockwise until they are fully open. Turn the hot water faucet knob to the "On" position and check for leaks.
     

change cold cartridge call danco if you can

first off, put the spring in the faucet big end down. then put the black rubber boot seal in next and push it into place. Then place the Stem in but be sure to line up the notches before you screw it all down. I hope the will help you....

#1 THE FAT PART OF YOUR SPRING GOES INSIDE THE FAUCET ,AND SIT ON THE VALVE BODY(SEAT)
#2 THE LITTLE BLACK WASHER SIT ON TOP OF YOUR SPRING
#3 PUSH THE STEMS IN THE CORRECT SIDES HOT ON LEFT.CAUTION THERE IS USUALLY NOTCHES ON THE SIDES OF THE STEMS TO HELP YOU ALIGN THEM IN THE VALVE BODY,
4 PUT THE NUT BACK ON ,TIGHEN SLIGHTLY,TURN ON THE WATER TO CHECK ,IF OK RE INSTALL YOUE HANDLES

Thae stem you got that said hot/cold were designed to fit old style cross handle faucets. So both hot and cold turned the same way. If the cold side you are replacing turns the opposite direction then you will need to get a cold stem. Danco does make them. Ask the retailer where you purchased the H/C stem. I hope this helps..

dependent on the type of faucet, you need to replace (a) the washers, (b.) the spring and seals or (c.) the gasket. They all serve the same purpose. 1. turn off the water supply to the faucet. 2. double handle? (a)remove the center cap (b) then remove the screw holding the handle down (c)next unscrew the valve stem retaining nut (normally it is the one right above the faucet body). (d) pull the valve stem out, if there is a small rubber piece held down by screw remove the screw, replace the washer. if there is a rubber gasket wrapped around the stem, remove and replace it, if nothing is on the stem look into the faucet body you should see 1 or 2 small rubber pieces these are the seals the springs are right below the seals. Remove and replace springs and seals. 3. single handle? remove the handle retaining screw, normally covered by hot/cold indicator symbol, unscrew valve stem retaining nut, pull the valve stem and replace either the gasket or springs and seals.

Sounds like you might need a gear puller -- hardware stores would have them -- or auto parts.
Spray with contact cleaner wd-40 first, then install puller, depress ring and crank away at the puller.