S200 Turbocharger RE508719 | Model-Matched for John Deere 4045/6068

Cross-Reference Verified — Every RE508719 variant matched against engine serial prefix and flange pattern before dispatch.

Technical Specifications

Application Suitability

Why the Same RE508719 Base Number Ships in Multiple Variants

The part number on your old turbo may be superseded, and only one variant physically fits your engine serial range.

I learned this the hard way in a desert quarry. A John Deere 6068 engine came in for turbo replacement. The book said RE508719. We ordered it. The flange angle was wrong by just enough that the exhaust manifold would not seat. The machine sat idle for days while we traced the issue back to a variant difference between early and late 6068HF258 builds. The S200 Turbocharger RE508719 for John Deere 4045 6068 cross reference fitment is not a single physical part — it is a family of parts sharing a base designation, with differences in flange clocking, oil drain orientation, and compressor housing geometry that only become visible when you hold two units side by side. [NEED_CITE: turbocharger variant identification procedures for off-highway diesel engines]

Ordering by base number alone invites a mismatch. The casting number on your existing unit, combined with the engine serial prefix, is the only reliable path to the correct variant.

Mapping Engine Serial Prefixes to Turbo Variants

The John Deere 4045 and 6068 engine families span decades of production, and the S200 turbocharger sits across many of those builds. A 4045DF150 uses a different compressor trim than a 4045TF250, even though both may reference the same base number. The 6068HRW61 and 6068HCQ07 variants differ in turbine housing A/R ratio, which changes the exhaust gas velocity profile. When we receive an inquiry, we pull the engine serial prefix first, then cross-check against known variant breakpoints before confirming fitment. This is the same verification process we wish someone had forced on us before that desert downtime incident.

Flange, Port, and Bolt Pattern Verification

The interface between the S200 Turbocharger RE508719 and your engine involves more than matching a part number. The exhaust inlet flange bolt pattern must align with your manifold studs. The oil drain port orientation must match the return line routing on your specific engine build — a 15-degree difference between early and late production blocks can make the difference between a clean install and a fabricated adapter. The compressor outlet clocking must point toward your charge air cooler piping without requiring new hoses. Before we ship, we verify these three interfaces against your machine model and, when available, photographs of your existing unit. [NEED_CITE: turbocharger flange and port alignment standards for industrial diesel applications]

Reading the Specifications That Matter in the Field

The Ni-resist ductile iron turbine housing (ASTM A439 Type D-2) resists the thermal cycling that cracks standard gray iron in high-exhaust-temperature applications like quarry excavators running continuous high-load cycles. The forged 7075-T6 aluminum compressor wheel holds its dimensional stability under the centrifugal loads that would fatigue a cast wheel over time. Dual ceramic ball bearings reduce friction at the shaft, which matters most during cold starts when oil film has not yet built up — a frequent failure trigger in desert and cold-climate operations alike. The 2.35:1 pressure ratio sits in the mid-range for these engine displacements, delivering adequate boost without pushing the compressor into surge at low RPM.

What a Misidentified Variant Actually Costs

When the wrong variant arrives on site, the cost is never just the shipping to send it back. The machine remains down. The crew stands by or shifts to lower-priority work. In a mining operation, that idle excavator means haul trucks queue up and the primary crusher starves. Even when a near-fit variant can be forced into place with modified gaskets or re-routed oil lines, the misalignment introduces vibration and thermal stress that shortens the life of both the turbo and the exhaust manifold studs. [NEED_CITE: cost impact of turbocharger misfit on fleet availability in earthmoving operations]

Why Procurement Teams Route This Part Through Us

Our own production lines and qualified sourced supply operate under one account and one warranty, so you never juggle multiple vendors for a single repair list. The eight product categories in our catalog mean the turbo, the exhaust gasket set, the oil feed line, and the air filter all ship in one consignment. We accept orders from a single piece — no minimum blocking an emergency replacement. Our Guangzhou warehouse holds stock on fast-moving turbo variants for immediate dispatch. We identify the correct unit from a part number, a machine model, a photograph, or a nameplate image. Cross-reference verification covers superseded numbers like RE59998 and RE60388, and we offer sample supply for physical fitment confirmation before you commit to a fleet-level order. Our technical team stays available for variant and grade questions throughout the process.

Documentation & Verification

• Commercial invoice listing each turbo variant with its matched engine serial range
• Cross-reference sheet mapping RE508719 to superseded numbers (reference only)
• Dimensional inspection record covering flange bolt circle and oil drain port angle
• Warranty terms specifying coverage period and manufacturing defect scope
• Packing photographs showing anti-static foam cushioning before carton sealing
• HS code and customs documentation prepared for destination country requirements

Fitment Check Before Installation

• Compare exhaust inlet flange bolt pattern against your manifold before removing protective packaging
• Verify oil drain port orientation matches your existing return line routing angle
• Check compressor outlet clocking against charge air cooler hose reach and bend radius
• Inspect turbine housing casting number against the cross-reference confirmation sheet included in the box
• Perform a dry fit without gaskets first to confirm all interfaces align without force

Send Us Your Machine Details for Fitment Confirmation

Provide your machine model, engine serial prefix, and a photograph of the existing turbo casting number if legible. If the nameplate is worn or painted over, the machine model alone gives us a starting point for cross-reference verification. We will confirm the correct variant, flag any superseded number issues, and advise on sample availability before you commit to volume.

Frequently Asked Questions

Q: How do I confirm this turbo fits my specific engine serial variant? A: Send us your engine serial number or the casting number from your existing turbo. We cross-check the serial prefix against known variant breakpoints for the 4045 and 6068 families, covering differences in flange orientation, compressor trim, and oil drain position. If the nameplate is unreadable, the machine model gives us enough to narrow the options.

Q: My old part number is RE59998 or RE60388 — is RE508719 the correct replacement? A: Those are superseded numbers that map to the RE508719 family. We verify each cross-reference (reference only) against your specific engine build code to confirm which physical variant you need. The base number alone is not enough — the engine serial prefix determines the correct flange and port configuration.

Q: I only have my machine model, such as 230LC — can you identify the right turbo? A: Yes. Machine model narrows the engine family and production era. We then cross-reference the typical engine builds for that model against our variant database. If multiple variants remain possible, we request a photograph of the existing unit or the engine serial plate to make the final determination.

Q: Can I get a sample to test fitment before ordering in bulk? A: We supply sample units for physical fitment trials. This is especially important when dealing with superseded part numbers or when your fleet includes machines from different production years. The sample confirms flange alignment, port orientation, and hose routing before you commit to a full order.

Q: Why does the same base number have so many cross-reference variants? A: John Deere revised the turbo specification across multiple engine generations and application ratings. Each revision changed a physical detail — flange angle, compressor trim, bearing type — while retaining traceability to the original base number. Our cross-reference verification maps each variant to the specific engine serial ranges it fits.