Replace ball assembly 1 in diagram repair part rp70 as shown for lever handles or rp212 for knob handles replace cam packing 2 in diagram repair kit rp61.
Delta arabella kitchen faucet leaking.
With a stem style faucet a neoprone valve seat and spring fits into the water inlet port in valve body.
Leaks from under the handle.
The handle then fits onto the top of the stem.
Replace seats and springs 4 in diagram repair part rp4993 if leak persists.
When one of these faucets.
If this occurs check the connection of the hose to the spray wand.
Leaks in this type of faucet usually can be fixed with a new neoprene valve seat and spring.
Replace stem unit assembly 3 in diagram repair part rp1740.
Replace the hose if it is damaged or leaking.
Over the valve seat and spring the stem is held into the body with a bonnet nut.
Replace stem unit assembly 3 in diagram repair part rp1740 leaks from base of the spout.
Since the water travels through the hose and not the spout itself a leak from the base of the spout would be very unlikely.
If this connection is secure and not leaking then check the hose for damage.
Leaks from under the handle.