Description

When your trusty 4000 or 4020 is burning oil, knocking on startup, or just doesn’t have the power it used to have, it’s time for the rebuild you’ve been putting off. These old six-cylinders are workhorses that’ll run for decades with proper care, and this comprehensive overhaul kit gives you everything you need to bring that 404 cubic inch diesel back to like-new performance.

What You’re Getting

Complete cylinder sleeve set with seals to restore proper bore dimensions and compression
High-quality pistons with rings, pins, and retainers for reliable long-term operation
Standard rod and main bearings plus connecting rod bolts for smooth running
Complete gasket set and crankshaft seals to prevent leaks and maintain proper sealing
Pin bushings for proper piston pin fit and reduced wear

Built for Real Farm Work

This kit fits John Deere’s legendary 4000 and 4020 series tractors—machines that defined reliable farm power for a generation. Whether yours has been pulling plows, running a loader, or powering PTO equipment for decades, this rebuild brings back the smooth idle and strong pull these tractors are famous for.

Made to Last

Tru-Power components are manufactured to meet or exceed original specifications, using quality materials that handle the demanding duty cycles of agricultural work. The 3-ring piston design with 4-1/4 inch standard bore dimensions ensures proper sealing and longevity in these proven engines.

Good to Know

This is a basic rebuild kit that covers the essential components for restoring engine performance. Plan on machine shop work for the block and head, and consider replacing the oil pump, water pump, and fuel injection components while you’ve got everything apart. A proper rebuild on one of these engines will give you years of reliable service.