Alright gearheads and equipment owners, listen up! This is the JCB Rear and Front Hub Wheel Oil Seal that you've been searching for. Specifically designed for your JCB 3CX, this bad boy replaces part number 904/50033 (just for reference, of course). The dimensions are 127mm x 160mm x 15.5/17.5mm - pretty specific stuff that matters when you're dealing with heavy machinery. What's cool about this seal is that it doesn't just fit the 3CX - it works with other JCB machinery too, which is super handy if you've got multiple pieces of equipment to maintain. Now, I know this listing has a bunch of other tractor parts mentioned, but let's focus on this oil seal - it's what you're really here for. Whether you're dealing with leaking hubs or doing routine maintenance, having the right seal makes all the difference. These things need to stand up to some serious punishment out there in the field, and from what I've seen, this one does the job right. Just make sure you're getting the correct part for your specific machine, but if you've got a JCB 3CX, you're in the right place. Installation's pretty straightforward if you know your way around heavy equipment, but if not, might want to get a pro to handle it.