John Deere, Kubota, Case IH farm equipment turbo rebuilds

PowerTech 3029, 4039, 4045, 6068, 6076

John Deere

The backbone of Deere agriculture: 2.9L threes, 4.5L fours, and 6.8L sixes across tractors, combines, sprayers and gensets. Turbos are overwhelmingly Schwitzer/BorgWarner S1B, S2A and S2B units, with Garrett units on some configurations, referenced under Deere RE-prefix numbers. Simple, tough, and highly rebuildable.

Larger frames and newer PowerTech (S200S, S300 VGT)

John Deere

Bigger 6068H and 9.0L applications move up to S200S and S300-family BorgWarner units, and Tier 4 machines add variable geometry with actuator diagnostics. We rebuild the VGT units as well, including mechanism cleaning and vane freeing.

V2403-T, V3300-T, V3800-T and D-series

Kubota

Kubota's turbo diesels power compact tractors, skid steers, mini excavators and mowers everywhere. The IHI RHB/RHF-family units are small and precise, and dealer assembly pricing on them is painful relative to their size. A rebuild is usually a fraction of the replacement quote.

Cummins B and Iveco/FPT power

Case IH / New Holland

Magnum and Steiger tractors run Cummins-based power with Holset HX-series turbos, while much of the New Holland and later Case IH line runs Iveco/FPT engines with Garrett and BorgWarner units. All are ship-in rebuild candidates, and Holset cores are our daily bread.

Perkins and AGCO power (Sisu)

Massey / AGCO

Massey Ferguson's Perkins engines wear Garrett and Schwitzer hardware; AGCO Power (formerly Sisu) engines run Holset and BorgWarner units. Older Perkins turbos on 1000-series engines remain fully serviceable decades on.

3LM Schwitzer, AiResearch T04B era

Vintage + Legacy

Restoring a classic? The Schwitzer 3LM-33 on older Deere two-cylinder-successor iron and the AiResearch T04B family on 70s and 80s tractors are exactly the kind of units we love: simple journal-bearing turbos where a careful rebuild returns them to factory spec. Originality preserved.

Dust ingestion past the air system

Ag turbos breathe the dirtiest air of any application. A neglected or poorly sealed air cleaner sandblasts the compressor wheel until the blades round off and the wheel unbalances. The telltale is a frosted, dull wheel surface. Fix the intake sealing when you install the rebuilt unit or it will happen again.

Coked bearings from hot shutdown

Tractor pulls into the shed after a full-load day and gets shut straight down. Oil in the center section bakes into carbon, and next morning's cold start runs the bearings dry. Decades of that routine is the single most common condition on the ag cores we open. A short idle-down habit doubles turbo life.

Long oil intervals and contamination

Farm engines run hard hours between changes, and fuel dilution plus soot loading wear the journal bearings early. By the time you notice oil consumption or whine, the shaft is scored. Rebuild covers it fully, and cleaner oil habits protect the fresh bearings.

Cracked housings from thermal cycling

PTO work means load cycling all day: full boost, idle, full boost. Turbine housings heat-check and eventually crack through. Small surface checking is normal and serviceable; through-cracks need a replacement housing, which we source across the Schwitzer and Holset families.

Seal leaks blamed on the engine

Oil in the intercooler pipe or a smoking exhaust gets blamed on rings on a high-hour engine when it is often just turbo seals. A rebuild is dramatically cheaper than an overhaul, so have the turbo assessed first. We will tell you honestly if the core points to an engine-side problem instead.

VGT sticking on tier 4 machines

Newer emissions-era ag engines with variable geometry turbos suffer the same carbon-stuck vanes as on-road diesels, triggering derates in the middle of field work. Mechanism cleaning and actuator evaluation usually restore them without a full assembly swap.