You have the clutch for the shaft which is all there. Appears like you are missing the black plastic piece in the front. See the link below:
https://www.google.com/search?q=hp+color+laserjet+5500+tray+3+cassette&biw=1024&bih=649&tbm=isch&imgil=VRpL1OQvmfxiHM%253A%253Bhttps%253A%252F%252Fencrypted-tbn3.gstatic.com%252Fimages%253Fq%253Dtbn%253AANd9GcRZiWRodqYW3C1xz0LLYBaz8Mk7l4VzbIPgsabeb0wPR5QwOWZI%253B800%253B800%253BKOO7wgZTVe_BnM%253Bhttp%25253A%25252F%25252Fwww.getthatpart.com%25252Fshop42%25252Fproduct.php%25253Fproductid%2525253D101155&source=iu&usg=__PODhzDvUJLxsLTL0Op0tyvc3FZU%3D&sa=X&ei=TU43U8DQF47gsATq8YDIBA&ved=0CHYQ9QEwCA#facrc=_&imgdii=_&imgrc=VRpL1OQvmfxiHM%253A%3BKOO7wgZTVe_BnM%3Bhttp%253A%252F%252Fwww.getthatpart.com%252Fshop42%252Fimage.php%253Ftype%253DT%2526id%253D101155%3Bhttp%253A%252F%252Fwww.getthatpart.com%252Fshop42%252Fproduct.php%253Fproductid%253D101155%3B800%3B800
https://www.google.com/search?q=hp+color+laserjet+5500+tray+3+cassette&biw=1024&bih=649&tbm=isch&imgil=VRpL1OQvmfxiHM%253A%253Bhttps%253A%252F%252Fencrypted-tbn3.gstatic.com%252Fimages%253Fq%253Dtbn%253AANd9GcRZiWRodqYW3C1xz0LLYBaz8Mk7l4VzbIPgsabeb0wPR5QwOWZI%253B800%253B800%253BKOO7wgZTVe_BnM%253Bhttp%25253A%25252F%25252Fwww.getthatpart.com%25252Fshop42%25252Fproduct.php%25253Fproductid%2525253D101155&source=iu&usg=__PODhzDvUJLxsLTL0Op0tyvc3FZU%3D&sa=X&ei=TU43U8DQF47gsATq8YDIBA&ved=0CHYQ9QEwCA#facrc=_&imgdii=_&imgrc=VRpL1OQvmfxiHM%253A%3BKOO7wgZTVe_BnM%3Bhttp%253A%252F%252Fwww.getthatpart.com%252Fshop42%252Fimage.php%253Ftype%253DT%2526id%253D101155%3Bhttp%253A%252F%252Fwww.getthatpart.com%252Fshop42%252Fproduct.php%253Fproductid%253D101155%3B800%3B800