My rental house has a lot of jalousie windows which is good for natural cooling throughout the house. But not so good when it comes to repairs or replacements. You can find many of these parts at your local hardware store or online. What I had to deal with mostly was broken levers! It seems like the weak point was the lever handle/attachment. Since I was new to this type of fixing, I decided to take off a bracket (lever side) and have a local screen/window shop replace the levers for me. The job required having my broken handles (2) replaced with new ones. Total cost: $85.00. I had 29 levers that needed to be replaced or repaired. The owner at the screen shop was really helpful and gave me tips on how to replace these handles myself. I already had a rivet gun so I picked the proper size rivets and a few handles (they are labeled right or left) from the shop. So just remove the old handle and replace with the new.
Easy. Hmmmm…… it depends. Some of you may consider this an easy project, but not for me. At first I tried working with the tracks still in place, by drilling out the rivets that attached the handle to the track. But found taking them down and placing them on a work bench was easier. Actually, I took all window tracks down because I wanted to paint the frames anyway. Some handles were just missing a broken rivet. So I fixed it with just replacing the rivet itself or using a short metal screw. Using a screw was a time saver. I had to drill out the hole a little larger for the screw size to fit. Use what ever works best for you.
Hope this helps.