I have... something that needs to be repaired, so I'd like you to come over and take a look. I'm sure you'll understand the problem once you see it. [It's definitely more than just 'something', but saying "Hey my friend is broken can you fix him" is awkward.]

I've asked another man to come as well, so you'll be working with him. I believe you might already know him, since Tear said he was a friend like you?