NN173504 Journal Bearing for Hitachi EX300-1 & Sumitomo S220 Turbochargers

The NN173504 journal bearing serves as an aftermarket replacement component for turbo model RHC7-12307HQ41NFBRL6424CC. Designed for heavy equipment applications including Hitachi EX300-1 and Sumitomo S220 with Isuzu 6SD1T and 6BG1 engines, this part supports reliable turbocharger rebuilds. Verify engine codes and turbo specifications before ordering to ensure correct fitment.

Key Specifications

This journal bearing is identified by part number NN173504 and supports turbo model RHC7-12307HQ41NFBRL6424CC. It is a critical internal component for maintaining shaft alignment and reducing friction during operation. The unit weighs approximately 0.03 kg, indicating a compact design suitable for standard turbocharger bearing housings. Buyers should confirm the exact bearing dimensions and material specifications against their service manual to ensure proper clearance and load capacity for heavy-duty engine applications.

Application & Compatibility

Source application path clues for buyer verification. These are source category/application paths, not confirmed fitment claims:

• HITACHI > HITACHI EX300-1 > ISUZU 6SD1T(CIAQ)
• HITACHI > HITACHI EX300-3C > ISUZU 6SD1T(CIBQ)
• SUMITOMO > SUMITOMO S220 > ISUZU 6BG1(CIAF)

This NN173504 journal bearing is listed for specific heavy equipment applications. Reference the following vehicle and engine combinations to help confirm fitment:

• Hitachi EX300-1 with Isuzu 6SD1T(CIAQ) engine
• Hitachi EX300-3C with Isuzu 6SD1T(CIBQ) engine
• Sumitomo S220 with Isuzu 6BG1(CIAF) engine

Always verify your exact engine code and turbo model RHC7-12307HQ41NFBRL6424CC before ordering. These application paths serve as reference clues; cross-check with your service manual to ensure the bearing matches your specific turbocharger housing requirements.

Technical Notes

Journal bearings are critical for maintaining shaft alignment within the turbocharger bearing housing. This component supports the rotating assembly, reducing friction and preventing excessive radial movement during operation. Proper clearance is essential for stable performance and longevity in heavy-duty applications like the Hitachi EX300-1. Inspect the bearing surface for wear or scoring before installation. Ensure the housing bore is clean and free of debris to prevent premature failure. Verify that the bearing matches the specific turbo model RHC7-12307HQ41NFBRL6424CC requirements for optimal fitment and function.

B2B Supply

LeadTurbo supports B2B buyers with volume pricing for the NN173504 journal bearing. Worldwide shipping is available for this aftermarket replacement part. Technical fitment support helps verify engine codes and turbo model RHC7-12307HQ41NFBRL6424CC details before ordering. Contact our team to confirm specifications for Hitachi EX300-1 or Sumitomo S220 applications. We assist repair shops and distributors in identifying correct bearing dimensions and material requirements for reliable turbocharger rebuilds.