5-09812062-0 OEM Final Pinion Bearing 30309 30309D for ISUZU NPR NKR 100P 600P 4JB1 Differential Tapered Roller Bearing
| Bore Diameter: | 45 Mm | Outer Diameter: | 100 Mm |
| Total Width: | 27.25 Mm | Inner Ring Width: | 25 Mm |
| Outer Ring Width: | 22 Mm | Net Weight: | Approx. 0.99 Kg |
| Bearing Type: | Single-Row Tapered Roller Bearing | Bearing Model: | 30309 / 30309D |
| High Light: | 5-09812062-0 Final Pinion Bearing,30309 30309D Differential Pinion Bearing,ISUZU NPR NKR 4JB1 Tapered Roller Bearing |
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The Final Pinion Bearing with OEM numbers 5-09812062-0 and 5098120620 is a verified direct-fit replacement for ISUZU NPR / NKR 2.75T / 100P / 600P series light and medium-duty trucks equipped with 4JB1 diesel engines. This bearing is a critical support component of the rear axle differential assembly, mounted inside the differential housing. It supports the front end of the differential pinion (bevel gear), ensuring precise alignment and smooth operation during high-speed rotation and high-torque transmission.
The final pinion bearing is the primary support element for the front end of the differential pinion gear. It withstands the radial loads and axial thrust generated when the pinion transmits engine torque, while ensuring precise meshing between the pinion and the ring gear. When the vehicle is in motion, the pinion rotates at engine speed, and the bearing must maintain stable support performance under these high-speed, high-load conditions to prevent pinion deflection or vibration.
The 30309 / 30309D is a single-row tapered roller bearing capable of accommodating combined radial and axial loads, widely used in commercial vehicle differentials, wheel hubs, and gearboxes. The 4JB1 is a 2.8L inline-four direct-injection diesel engine widely used in ISUZU NPR/NKR series trucks from 1986 to 2007.
Replace the bearing when any of these symptoms appear:
- Abnormal noise or humming from the rear differential area — worn or pitted bearing races cause abnormal noise during pinion rotation, often more noticeable at specific vehicle speeds.
- Vehicle vibration during driving — worn bearing causes pinion deflection, resulting in drivetrain vibration.
- Differential oil leakage — worn bearing damages the pinion shaft sealing surface, causing differential oil leakage.
- Abnormal pinion gear tooth wear — excessive bearing clearance causes poor meshing between the pinion and ring gear, accelerating tooth surface wear.
- Drive axle overheating — worn bearing increases friction resistance, raising the temperature of the differential area.
- Impact sensation during gear shifting or acceleration — excessive bearing clearance causes uneven torque transmission.
| Verification Item | Data / Standard | Source / Method |
|---|---|---|
| Part Number (Short) | 5-09812062-0 | Spanish Isuzu-Truckspares; fag-srd.com |
| Part Number (Long) | 5098120620 | 17vin.com; Thai Autopart-Masters |
| Bearing Model | 30309 / 30309D | 17vin.com; SKF; Koyo JTEKT |
| Bearing Type | Single-Row Tapered Roller Bearing | SKF specification; Koyo JTEKT |
| Bore Diameter (d) | 45 mm (1.7717 in) | SKF; Koyo JTEKT; Timken |
| Outer Diameter (D) | 100 mm (3.937 in) | SKF; Koyo JTEKT; Timken |
| Total Width (T) | 27.25 mm (1.0728 in) | Koyo JTEKT; Timken; Fersa |
| Inner Ring Width (B) | 25 mm (0.9843 in) | SKF; Timken |
| Outer Ring Width (C) | 22 mm (0.8661 in) | Timken; Koyo JTEKT |
| Net Weight | Approx. 0.99 kg | Fersa specification |
| Application Position | Rear Axle Pinion Bevel Gear, Large End Front | zhouchengku.com |
| Engine Compatibility | 4JB1 | Indonesian Isuzu-Truckspares; Thai Autopart-Masters |
| Cross-Reference OEM | 5098120621 / 1098120260 / 1098120270 / 9000936131 / 9000936010 / 5098120630 / 2402241-P301 | GoTrucky; 17vin.com; Yishan Auto Parts |
| Brand | BZLP / KOYO / NTN / Fersa, etc. | Italian Isuzu-Truckspares; amdstore.net |
| Certification | ISO/TS 16949 | Italian Isuzu-Truckspares |
| Warranty | 12 Months | Spanish Isuzu-Truckspares |
| Part Number: | 5-09812062-0 | Product Name: | Final Pinion Bearing |
| Car Model: | NPR NKR | Engine Model: | NPR NKR |
| Condition: | 100% Brand New | Size: | Standard |
| Weight: | Standard | Origin: | China Mainland |
| Main Market: | Middle East, Asia, Africa, South America, North America & Europe | Package: | Neutral Packing Or Make It As Requested |
| Material: | High-strength aluminum alloy & precision bearings | Cooling Type: | Engine coolant circulation |
| Installation: | Direct OEM replacement | Quality Standard: | OEM equivalent / ISO quality control |
| Brand | Model | Chassis | Engine | Years |
|---|---|---|---|---|
| ISUZU | ELF | NKR55 | 4JB1 | 1986–2007 |
| ISUZU | ELF 250 | TLD54 | 4BA1 | 1970–1982 |
| ISUZU | NPR | NPR | 4JB1 / 4HE1 | 1986–2007 |
| ISUZU | NKR | NKR55 / NKR66 | 4JB1 / 4HF1 | 1986–2007 |
| ISUZU | 100P | — | 4JB1 | 1990s–2000s |
| ISUZU | 600P | — | 4JB1 | 1990s–2000s |
| ISUZU | NPR NKR 2.75T | — | 4JB1 | — |
| Engine Model | Displacement | Common Applications |
|---|---|---|
| 4JB1 | 2.8L | NKR55, NPR, 100P, 600P, NKR 2.75T |
| 4BA1 | 2.8L | ELF 250 (TLD54) |
| 4HE1 | 4.8L | NPR |
- This bearing is designed for ISUZU NPR / NKR 2.75T / 100P / 600P series. Confirm your specific model and year before ordering.
- The 5-09812062-0 is the primary OEM number. The 5098120621, 1098120260, 1098120270, 9000936131, 9000936010, 5098120630, and 2402241-P301 are cross-reference numbers for the same application. Verify your exact OEM number against your original component.
- Apply appropriate differential oil to the bearing races before installation.
- Always inspect the pinion shaft journal and differential housing bearing seat for wear and replace as necessary.
- After installation, check the differential oil level and torque all fasteners to specification.
- For right-hand drive (RHD) vehicles, verify installation orientation. Refer to the ISUZU workshop manual for the correct procedure.
| Feature | Benefit + Verification Signal |
|---|---|
| Single-Row Tapered Roller Bearing Design (30309 / 30309D) | Accommodates combined radial and axial loads for heavy-duty differential applications — verified by SKF and Koyo JTEKT specifications. |
| 45×100×27.25 mm Standard Dimensions | Precision-matched to ISUZU NPR/NKR differential housing bearing seat — verified by SKF, Timken, and Fersa specifications. |
| High-Precision Race Machining | Ensures smooth pinion rotation with minimal noise and vibration — verified by GoTrucky product page specification. |
| Heavy-Duty Durable Design | Withstands high torque, repeated rotation, and commercial truck use — verified by GoTrucky product page specification. |
| Wide Vehicle Compatibility | Covers ISUZU NPR, NKR, 100P, 600P, NPR NKR 2.75T models — verified by multilingual Isuzu-Truckspares and Autopart-Masters application data. |
| ISO/TS 16949 Certified | Full traceability with material certificates and batch inspection reports — verified by Italian Isuzu-Truckspares specification. |
| 12-Month Warranty | Manufacturer-backed quality assurance for fleet operations — verified by Spanish Isuzu-Truckspares. |
| QC Item | Verification Method / Standard |
|---|---|
| Bore Diameter (45 mm) | CMM, 100% inspection |
| Outer Diameter (100 mm) | CMM, 100% inspection |
| Total Width (27.25 mm) | CMM, 100% inspection |
| Race Roundness | Roundness tester, 100% inspection |
| Roller Dimensions | Micrometer, batch sampling |
| Material Hardness | Rockwell hardness tester, batch sampling |
| Material Composition | Spectrometer analysis, batch sampling |
| Rotation Flexibility | Functional test, 100% inspection |
| Noise Test | Noise tester, 100% inspection |
| Surface Finish | Visual inspection — no cracks, no pitting, no corrosion |
| Batch Traceability | Material lot number + production date |
| Packaging Protection | Anti-rust oil + VCI film + carton |
- Preparation: Raise the vehicle on a hoist. Drain the differential oil. Remove the driveshaft.
- Removal: Remove the pinion nut and flange. Withdraw the pinion and old bearing. Remove the bearing using a dedicated puller.
- Inspection: Inspect the pinion shaft journal for wear or scoring. Inspect the differential housing bearing seat for wear. Inspect the pinion gear teeth for abnormal wear.
- Installation: Apply appropriate differential oil to the bearing races. Press the new bearing into the differential housing using a dedicated installation tool.
- Pinion Installation: Install the pinion and flange. Torque the pinion nut to specification.
- Oil Seal Installation: Replace the pinion oil seal. Verify correct installation orientation.
- Final Check: Check the differential oil level and fill to specification. Confirm all fasteners are torqued to specification.
- Road Test: Lower the vehicle and perform a road test to verify proper rear axle operation and absence of abnormal noise.
| Fastener | Torque |
|---|---|
| Pinion Nut | Per ISUZU workshop manual specification |
| Differential Housing Bolts | Per ISUZU workshop manual specification |
| Driveshaft Bolts | Per ISUZU workshop manual specification |
- Every 10,000 km: Check differential oil level and condition. Check rear axle for abnormal noise.
- Every 40,000–50,000 km: Replace differential oil. Inspect rear axle seals for leakage.
- Every 100,000 km: Inspect pinion bearing for wear. Replace if necessary.
- When abnormal rear axle noise or vibration is detected: Inspect the differential assembly, including the pinion bearing, immediately.
- When replacing the pinion oil seal: Always inspect the bearing for wear and replace if necessary.
- Standard Packaging: Anti-rust oil + VCI film + neutral carton.
- Custom Packaging: Neutral box, color box, or customer-branded packaging.
- Suitable For: Drivetrain repair shops, ISUZU parts distributors, fleet maintenance centers.
- Supply Capacity: Stable batch supply with batch-level quality reports available.
- MOQ: 1 PCS
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