TM 9-2320-209-20-3-2 c. Replacement. NOTE If putting on the same air compressor that was taken off in para 13-31b, start with frame 2. If putting on new air compressor, start with frame 1. 1. 2. 3. NOTE All replacement air compressors come with a protective cover, gasket, and slotted nut. Do not use this gasket or nut when putting air compressor on truck. Using screwdriver, pry off four push-on nuts (1). Take off four rivets (2), protective cover (3), and gasket (4). Unscrew and take off slotted nut (5). Throw away parts (1 through 5). NOTE Air compressor pulleys (6) come with or without keyways. If pulley (6) does not have a keyway, using hammer and punch, take key (7) out of shaft (8). GO TO FRAME 2 13-242