Jameco single handle kitchen faucet with spray is hard to turn

Diagram is here http://www.ereplacementparts.com/moen-7175csl-kitchen-sink-faucet-parts-c-143601_143605_143680.html

make this steps and fix it. God bless you
f a faucet leaks, replace seals and gaskets . If a shower head leaks, create a better seal or replace seals .
If a sillcock wears out, replace the washers .
If a compression faucet drips from the spout, replace the washer and/or the seat .
If a faucet leaks from the handle, replace O-ring(s), replace the packing washer, tighten the packing nut, or replace worn packing, depending on the valve type.
If a ball or cartridge faucet leaks from the collar, replace worn O-rings .
If a disk faucet leaks around the base or has reduced flow, replace cracked or pitted disk assembly or worn inlet seals
If there is water under the sink, tighten the faucet-set locknuts under the sink. You also can replace putty or a gasket, replace a worn faucet, or replace leaky supply tubes .
If the aerator leaks around the edge, replace the washer in the aerator
If the spray hose leaks or has reduced flow, replace the O-ring on the diverter valve, replace a worn washer at the base of the spray head, or clean the diverter valve and spray head

You can find replacement parts on amazon, click here Award winning faucets and shower heads and take a look. Cheers

there is a diverter inside the faucet that works with water pressure possibly has some debris or calcium build up.turn off water supply and take out cartridge. you should see the diverter

Since you are replacing the Delta Faucet Delta 470-BL-DST Signature Single Handle Pull-Out Kitchen Faucet With Spray faucet, bend the water supply lines out of the way, and then use a standard basin wrench to remove the nut.

replace diveryer valve

Hot water line connected to left side of faucet? Did you replace tap set, or just cartridge? Cartridge may be out 180 degrees.

Sounds like you may need to replace the cartridge if you have one of the late model single control models. You may get a clue as to how your faucet might be put together by finding a similar faucet on the Moen web site, and looking at their exploded parts diagram. (They are good about posting information; although some say their products are not so good; I really don't know personally)

shut-off the water, pull the handle and the spout. change the 2 "O"ring and make sure the spout body has no dirt in them. apply some the plumbing grease bewteen the spout body. put everything back.

Your problem is a simple one.

1. Turn off water to faucet.
2. Place a towel(s) in the base of the sink(s) to prevent any parts from going down drain.
   
3. Remove the handle to the faucet. (single handle only)
   
4. If not a single handle then remove spout from faucet.
5. If a single handle remove cap carefully and any loose parts.
6. Gently turn spout side to side while lifting to remove.
7. You will see a hole with a very small valve where the water comes out to the spout on the base of the faucet.

1. Remove this valve (which is a backflow preventer) and replace.
2. Reassemble and test.
   

Problem solved.