Description
When your trusty John Deere's heart starts burning oil or losing compression, it's time for more than just crossing your fingers and hoping. This major overhaul kit gives you everything you need to bring that 404 cubic inch turbocharged diesel back to its glory days. Whether you're facing smoking on startup or just want to get ahead of the inevitable, this kit puts new life back into the engine that's been the backbone of your operation.
What You're Getting
- Complete rebuild coverage with sleeves, pistons, rings, pins, bushings, and gasket set—no hunting for missing pieces
- Connecting rod bolts included so you're not scrambling to find the right hardware mid-rebuild
- 3-ring pistons with keystone top compression rings for better oil control and longer life
- Standard rod and main bearings sized for proper clearances and oil flow
- Quality seals and gaskets to keep oil in and dirt out where it belongs
Built for the Heavy Hitters
This kit's designed for the workhorses of John Deere's lineup from the late '60s through mid-'70s. The 4320 and 4520 series tractors handled serious row-crop work, while the bigger 4620 and 7020 models were the heavy pullers that could work ground or handle the biggest implements. These were the tractors that put in long days during planting and harvest when downtime wasn't an option.
Made to Last
TISCO has a reputation for making aftermarket parts that hold up to farm conditions, manufacturing parts to handle the stresses and demands of agricultural work. The components in this kit are built to meet or exceed the original specifications, so you're not just fixing the problem—you're solving it for years to come.
Installation Notes
This is a major rebuild, so plan on having your tractor down for a while and make sure you've got the right tools and workspace. Take time to measure everything and check for wear in related components—there's nothing worse than buttoning up a fresh engine only to have an old part fail. If you're doing the work yourself, don't rush the ring gaps and bearing clearances—they're critical for a long-lasting rebuild.