Description

When your John Deere 4040 starts showing signs of serious engine wear—low compression, excessive oil consumption, or that telltale blue smoke—it’s time for more than just a tune-up. This complete major overhaul kit gives you everything you need to rebuild your 404 cubic inch diesel engine back to factory specs, including those critical connecting rod bolts that many basic kits leave out.

What You’re Getting

Complete cylinder sleeves and seals to restore proper compression and eliminate oil burning
Pistons with 3-ring design featuring keystone top compression ring for superior sealing
Connecting rod bolts included—no need to worry about reusing stretched hardware
Standard rod and main bearings to restore proper crankshaft clearances
Complete gasket set and crankshaft seals to eliminate all leak paths

Built for the 4040 Workhorse

Your John Deere 4040 has been the backbone of farming operations for decades, whether you’re pulling heavy tillage equipment, running a large grain drill, or powering PTO-driven implements. This 6-cylinder diesel powerplant was built to handle serious workloads, and when rebuilt with quality components like these, it’ll give you many more years of reliable service.

Made to Last

This Tru-Power kit uses OEM-quality components designed to handle the demands of agricultural work. The 4-1/4 inch standard bore pistons are built for long service life, while the included connecting rod bolts ensure your rebuilt engine won’t suffer from loose rods—a common problem when old bolts are reused after they’ve been stretched.

Good to Know

This is a complete major overhaul, so plan on having the tractor down for a while and make sure you have access to proper engine lifting equipment. The included connecting rod bolts are a nice touch that saves you from having to source them separately. While you’ve got everything apart, it’s a good time to check the crankshaft for wear and have it turned if needed—this kit includes standard bearings, but oversized are available if your crank needs work.