Turbocharger T422417 | Direct Fit for CAT C4.4 SPF343C

Verified Fitment — Serial-range check confirms T422417 turbocharger alignment with CAT C4.4 oil port orientation on SPF343C units.

Technical Specifications

Application Suitability

Why the Same Turbocharger Part Number Ships in Multiple Variants

The base number alone does not guarantee the oil port, flange, or seal configuration matches your specific engine build.

A T422417 turbocharger replacement for CAT C4.4 engines can appear across several SPF343C production runs, yet the physical interface may shift between early and late serial ranges. I have seen units where the outer diameter matched perfectly, but the oil inlet was rotated by a significant angle relative to the mounting flange [NEED_CITE: turbocharger oil port orientation variance across engine serial ranges]. Forcing that connection leads to oil leaks within the first hours of operation. Cross-reference tables copied between sellers often carry forward errors from superseded numbers, making a seemingly correct match fail on the bench.

Serial Range and Engine Build Date Verification

Identifying the correct T422417 turbocharger variant starts with the engine serial number or production date stamped on the CAT C4.4 nameplate. The SPF343C trailer-mounted pumper was built across multiple production phases, and the turbocharger mounting interface was revised at least once during that span. Providing the engine serial allows our technical team to confirm whether the oil port angle, flange bolt circle, and seal groove match your specific build. This step prevents the common situation where a turbocharger for CAT C4.4 fits the manifold but cannot connect to the oil supply line without modification.

Interface Checkpoints That Separate Correct Fitment From Costly Returns

Before confirming an order, three physical interfaces require direct comparison against the removed unit or the engine casting. The oil inlet and drain port positions must align with the existing hard lines or flexible hoses on the SPF343C. The mounting flange bolt pattern should match the stud arrangement on the exhaust manifold, including any asymmetrical spacing that appeared in later C4.4 revisions [NEED_CITE: exhaust manifold flange bolt pattern revisions in C4.4 engine series]. The compressor outlet diameter and clamp type must mate with the charge air pipe without adapters. Mismatches in any of these three areas mean the unit physically bolts on but cannot be plumbed correctly.

Dimensional and Material Specifications Explained

The Inconel 718 turbine wheel handles the sustained exhaust gas temperatures typical of the C4.4 under continuous load in trailer-mounted pumper duty, where ambient conditions at municipal or industrial sites can push thermal cycling beyond what standard alloy wheels tolerate. CNC-machined aluminum alloy compressor housing maintains concentricity across the ±0.02 mm dimensional tolerance, which directly affects the seal land alignment and prevents boost leakage past the compressor wheel tip. Dual ceramic ball bearings reduce friction at the high rotational speeds this turbocharger reaches, and they resist the oil coking that degrades conventional steel bearings during hot shutdowns. The SAE J1927 seal standard and 4.5 bar oil containment rating address the crankcase pressure spikes that occur when the SPF343C pump engages under load, keeping oil inside the bearing housing rather than pushing it into the intake or exhaust side.

The Hidden Cost of Skipping Variant Confirmation

Ordering a turbocharger based solely on the base number without checking serial-range variants leads to one of two outcomes. The unit arrives and physically cannot connect to the oil lines, forcing a return shipment and a second downtime window while the correct variant is sourced. Or worse, it bolts on with slight misalignment, and the oil leak appears after the machine has been returned to service, requiring a third teardown to replace a seal that was compromised from the first hour [NEED_CITE: turbocharger oil leak root causes in aftermarket replacement scenarios]. Both paths cost more than the time spent verifying the engine serial before purchase.

Why Sourcing This Turbocharger Through XUNPO Works

Our production and sourcing lines operate under a single warranty and QC protocol, so whether the T422417 comes from our own facility or a qualified partner, the verification standard is identical. Eight product categories under one account mean the gaskets, oil lines, and air filter elements needed alongside this turbocharger ship in the same consignment. The one-piece minimum order supports the single-unit emergency replacement that a downed SPF343C demands. Guangzhou warehouse stock covers common C4.4 service items for fast dispatch. Part identification from a machine model, photograph, or nameplate image resolves situations where the turbocharger data plate is illegible. Cross-reference verification covers superseded and alternate numbers, catching errors before the part ships. A sample unit can be supplied for fitment confirmation on the bench before a fleet-level commitment is made.

Documentation & Verification

• Commercial invoice and packing list referencing T422417 and SPF343C application
• Part compatibility and cross-reference sheet marked reference only for OEM numbers
• Dimensional inspection record covering flange bolt pattern and oil port angle
• Six-month warranty terms against manufacturing defects
• Packing photographs showing anti-vibration foam and reinforced carton condition
• HS code and customs documentation support for international shipment

Fitment Check Before Installation

• Compare oil inlet and drain port positions against the removed turbocharger before unboxing seals
• Verify flange bolt circle diameter and stud count match the exhaust manifold on your SPF343C
• Check compressor outlet diameter and clamp groove against the existing charge air hose
• Rotate the center housing to confirm oil port clocking aligns with supply and return lines
• If port angle or flange pattern does not match, stop installation and contact technical support with photos

Request a Fitment Confirmation

Provide the CAT C4.4 engine serial number or a clear photograph of the engine nameplate, and our technical team will cross-check the T422417 variant against your specific SPF343C build. If the original turbocharger is still on the bench, send photos of the oil port orientation and flange pattern for direct comparison. This confirmation step ensures the replacement turbocharger for CAT C4.4 arrives ready to install without adapter fittings or return shipments.

Frequently Asked Questions

Q: How do I confirm the T422417 turbocharger fits my specific SPF343C unit? A: Send the CAT C4.4 engine serial number from the nameplate, or a clear photo of the nameplate if the stamping is worn. Our technical team cross-references the serial range against the known oil port orientation and flange pattern for your production batch, and confirms which T422417 variant matches before the order is placed.

Q: The old turbocharger part number has been superseded — is the current number a direct replacement? A: Superseded numbers often indicate an interface revision rather than a simple renumbering. We verify whether the superseded and current numbers share the same flange bolt pattern, oil port clocking, and seal specification for your engine serial range, and flag any differences before confirming compatibility.

Q: Why does the same base turbocharger number exist in several variants? A: Production revisions to the CAT C4.4 engine across the SPF343C lifespan introduced changes to oil port angle, flange geometry, or seal groove dimensions. Each variant shares the base performance specification but differs in physical interface. We identify the correct variant by engine serial number or build date.

Q: I only have the machine model and no readable part number — can you identify the correct turbocharger? A: Yes. Provide the SPF343C machine serial number and, if possible, a photo of the turbocharger mounting area or the engine nameplate. We cross-reference the machine build record to determine the original turbocharger configuration and confirm the matching aftermarket variant for your unit.

Q: Can I order one sample unit to verify fitment before placing a bulk order? A: A single T422417 unit can ship as a sample for bench fitment on your SPF343C. Confirm the oil port alignment, flange match, and hose connections before committing to fleet quantity. The sample carries the same six-month warranty and inspection documentation as a production order.