DESCRIPTION Eight new replacement hydraulic pump piston springs for John Deere industrial construction models: 300, 300B, 302A, 310, 310A, 400, 401, 401C, 410B, 415B, 444, 444C, 444CH, 500, 500A, 500B, 510, 540A, 544, 544A, 544B, 544C, 570, 570A, 600, 640, 644, 644A, 644B, 646, 646B, 670A, 672A, 700A, 740, 740A, 760, 760A, 770, 770A, 772A Skidder Models: 340D, 440, 440A, 440B, 440C, 540, 540B Tractor Models: 2440, 4040, 4240, 4440 Replaces Part Number: R62372, AR33821, AR55186, AR76762