I have a rankan hose reel cart and want to hook up to faucet so i can move the cart to grass?

We live in a townhouse so our yard is't very large. We had actually skipped a few weeks of cutting the grass since our reel mower blades were too dull to cut the thick weeds and grass. This thing got the job done and did't break a cord. Really love Black & Decker tools. More details about the tips and tricks about the Black & Decker Click the link String is stuck on reel

yes
pull it apart and replace the worn rubber "O" ring

It's a complete cartridge that you need to replace. Contact Grohe and they should send you out a new cart. under their limited lifetime warranty

You can get 10" never flat tires with 5/8" hubs that will work. Home Depot has 4 for $59 online.

The hose on the side that connects to the water supply is not the same hose that goes inside.
The side hose connects to the faucet and the fitting on the hose reel is not supposed to rotate.
The hose that the homeowner installs connects to the adapter on the center of the reel and this goes around when the spool is turning. Beyond that, I don't really understand the question. Hopefully this will give you some information that you can use and then post back.
Gary

check the sprayer handle by disconnecting and blowing into it and pressing sprayer handle and/or for possible kink at main body or hose by disconnected sprayer point hose into sink and turn on water. If no water the the diverter in main body is not working properly and needs to be reassembled or replaced

If I am reading this correctly you want to connect washer to the faucet inputs. This requires washer hose kit at any hardware store. Kit has two hoses,<simular to garden hose> they have double end that will connect to both washer and faucet.Make sure when hooking up you hook cold to cold and hot to hot,< washer has C and H to know which is which.

See that your hose does not have any clogging in the filter screens; connect to the cold. careful with the threadings; turn on faucet & check for any leaks........start washing. Will tell you later how to get a manual. Regarding hot water, your machine can heat it if it has provision.