HX40W Turbocharger 2839811 | Cross-Reference for Cummins QSL ISL ISC8.3

Cross-Reference Verified — 19 superseded and alternate numbers for HX40W Turbocharger confirmed against Cummins QSL, ISL, and ISC8.3 serial ranges.

Technical Specifications

Application Suitability

Why the Same HX40W Part Number Ships in Multiple Variants

The base number alone does not guarantee fitment — engine serial range and build variant determine which HX40W actually bolts on.

Superseded turbocharger numbers across Cummins engine generations create frequent misorders. A single mismatched variant means the machine stays down while a return ships back and the correct unit travels out. I have seen part number 2839811 confirmed as correct, yet the QSL engine serial dictated a different oil port orientation, resulting in an immediate leak on first startup [NEED_CITE: Cummins turbocharger oil port orientation by engine serial range]. The HX40W Turbocharger for Cummins QSL ISL ISC8.3 / cross reference chain spans 19 alternate and superseded numbers, but not every number applies to every serial within that production window.

Serial Range Determines the Correct Build Code

The HX40W base model covers a wide production span, but the specific build code — HX40W-B85J71GL/C76L84FH18UD-W — maps to particular engine generations within the 2004–2011 window. Engines produced early in that range may carry different compressor housing orientations or wastegate configurations compared to later builds. Verification starts with the engine serial, not just the nameplate model.

Flange Interface and Oil Port Position Are the Real Separators

The flange bolt pattern and oil drain port location differ between ISC8.3, QSL, and ISL applications even when the base turbo model remains HX40W. A turbo that physically bolts to the manifold but has the oil return port rotated even slightly will leak under boost pressure or fail to drain properly, leading to seal failure within operating hours [NEED_CITE: turbocharger oil drain angle requirements for diesel engines]. Physical measurement of the old unit's port clocking and flange face before ordering eliminates this class of fitment error.

Spec Interpretation: What the Build Code Tells You

The HX40W designation covers the compressor and turbine wheel geometry family. The extended code HX40W-B85J71GL/C76L84FH18UD-W specifies the exact compressor inducer diameter, turbine trim, bearing housing configuration, and wastegate actuator calibration. The B85 segment relates to compressor wheel trim and flow capacity, which must match the engine's fuel map and boost target. The J71GL portion defines the turbine housing A/R ratio, controlling exhaust gas velocity and spool response. C76L84FH18UD-W locks in the bearing housing oil port orientation, flange type, and actuator bracket position. Substituting a turbo with the correct base model but incorrect extended code risks over-boost, under-boost, or physical interference with adjacent engine components.

The Hidden Cost of Forcing a Near-Match

Installing a turbo that almost fits — correct bolt pattern but wrong oil port clocking — typically shows no problem at idle. Under load, oil accumulates in the bearing housing because drain gravity angle is wrong, pushing past the piston ring seal into the compressor side. The result is blue smoke, carbon buildup in the charge air cooler, and eventual bearing failure [NEED_CITE: turbocharger bearing failure modes from oil drain restriction]. A forced fitment also stresses the manifold flange if bolt holes align but the gasket surface does not seat evenly, creating exhaust leaks that degrade boost pressure and raise exhaust gas temperatures.

Why Source This HX40W Turbocharger Here

Our own production lines and qualified sourced supply operate under one account and one warranty structure, so whether this turbo comes from our facility or a partner plant, QC terms remain identical. We stock eight product categories so a complete engine service order — turbo, gaskets, oil lines, filters — ships as one consignment. Minimum order starts at one piece for emergency replacements. Guangzhou warehouse inventory enables fast dispatch on common Cummins applications. Part identification works from a number, a machine model, a photograph, or a nameplate image when the stamping is worn or painted over. Cross-reference verification covers all 19 superseded and alternate numbers listed for this turbo, including discontinued references. Sample units ship for fitment confirmation before you commit to fleet-level quantities.

Documentation & Verification

• Commercial invoice and packing list itemizing each HX40W unit with build code
• Cross-reference sheet mapping your existing number to 2839811 (reference only)
• Dimensional inspection record covering flange bolt pattern and oil port clocking
• Warranty terms specifying coverage period for manufacturing defects
• Packing photographs showing unit protection before crate closure
• HS code and customs documentation for cross-border shipment

Fitment Check Before Installation

• Compare oil drain port orientation on the new HX40W against the removed unit before bolting on
• Verify flange gasket surface is clean and free of carbon scoring that could cause exhaust leaks
• Check wastegate actuator rod length and bracket alignment against engine mounting point
• Confirm compressor outlet diameter matches existing charge air cooler hose or piping
• Hand-rotate the turbine wheel to check for shaft play or binding before final installation
• If port clocking differs, do not force fitment — request exchange for correct variant

Request Fitment Verification

Provide your engine model, serial number, or a photograph of the existing turbo nameplate and mounting flange. If the nameplate is unreadable, a photo of the oil port position and flange bolt pattern allows us to confirm the correct HX40W Turbocharger for Cummins QSL ISL ISC8.3 / cross reference match. For fleet orders, request a sample unit for physical trial fitment before committing to full quantity.

Frequently Asked Questions

Q: How do I confirm this HX40W fits my Cummins engine when the nameplate is unreadable? A: Send a photograph showing the oil drain port position, flange bolt pattern, and compressor housing outlet. We cross-check these physical features against the known build variants for ISC8.3, QSL, and ISL engines to identify which of the 19 reference numbers applies to your specific serial range.

Q: My old part number is 4044082 or 4046101 — is it still valid? A: Both numbers appear in the verified cross-reference chain for 2839811 and remain valid as interchange references. However, superseded numbers sometimes covered multiple variants that later split into separate part numbers. Provide your engine serial so we confirm which current build matches your application.

Q: Why do multiple part numbers point to the same turbo? A: Cummins revised turbo specifications across engine generations within the 2004–2011 production window. Each revision received a new number even when the base HX40W model stayed the same. The correct number depends on your engine serial and the specific build code required for your manifold and oil plumbing configuration.

Q: I only have the machine model, no part number — can you still identify the correct turbo? A: Yes. Provide the machine model and production year — for example, Valmet 445 FXL from 2008 — and we narrow the applicable engine serial range. From there we confirm which HX40W variant matches, including flange type and oil port orientation specific to that machine platform.

Q: Can I get a sample turbo to verify fitment before placing a bulk order? A: Sample units ship for physical fitment testing. Install the sample on one machine, verify bolt pattern alignment, oil port clocking, and actuator bracket position under actual operating conditions, then confirm the bulk order quantity once fitment is validated across your fleet.