ISUZU NKR55 Inner Rear Hub Oil Seal 76*102*22 mm Dual-Lip Design NBR Material OEM Fit 8-94336314-1
| Inner Diameter: | 76 Mm | Seal Type: | Dual-Lip, Metal Case |
| Height: | 22 Mm | Net Weight: | 0.15 Kg |
| Outer Diameter: | 102 Mm | Material: | NBR (Nitrile Butadiene Rubber) |
| Operating Temperature: | −40°C To +120°C | Torque Specification: | 59 N*m (51 Lb*ft) |
| High Light: | Dual-Lip Design Inner Rear Hub Oil Seal,NBR Material Wheel Hub Seal,76*102*22 mm Rear Axle Oil Seal |
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Inner Rear Hub Oil Seal 8-94336314-1 8943363141 for ISUZU NKR55 100P 600P 4JB1 — Verified OEM Fit 76×102×22 mm NBR Wheel Hub Seal
The Inner Rear Hub Oil Seal with OEM numbers 8-94336314-1 and 8943363141 is a verified direct-fit replacement for ISUZU NKR55 / 100P / 600P / NKR / NPR / NLR85 / NMR85 light trucks equipped with the 4JB1 diesel engine. This oil seal is a critical rear wheel hub sealing component, responsible for retaining hub lubrication and preventing dirt, water, and debris from entering the rear wheel bearing assembly to ensure smooth bearing operation and extended component life.
The inner rear hub oil seal is installed in the rear wheel hub assembly, creating a dynamic seal between the rotating hub and the stationary axle housing. It retains gear oil and grease within the wheel bearing cavity while preventing external contaminants from entering. The dual-lip design features a primary sealing lip that maintains contact with the axle shaft surface under spring tension, and a secondary dust lip that blocks water, mud, and debris from reaching the primary seal. The NBR (Nitrile Butadiene Rubber) construction with metal case provides excellent resistance to gear oil, high temperatures, and compression set, ensuring reliable sealing under all operating conditions. The 4JB1 is a 2.8L four-cylinder direct-injection diesel engine widely used in ISUZU NKR/NPR light trucks from 1986 to 2007.
Replace the inner rear hub oil seal when any of these symptoms appear:
- Gear oil leakage at the rear wheel hub — visible oil traces on the inner wheel or brake backing plate.
- Wheel bearing noise or vibration — oil loss and contaminant entry cause accelerated bearing wear, producing growling or rumbling noises from the rear axle.
- Brake contamination — oil leaking past a failed seal can contaminate brake shoes or pads, reducing braking effectiveness.
- Water or mud intrusion — damaged dust lip allows contaminants into the bearing cavity, causing rust and pitting on bearing surfaces.
- Excessive wheel bearing play — prolonged seal failure leads to bearing degradation and detectable wheel play.
| Part Number: | 8-94336314-1 8943363141 | Product Name: | Inner Rear Hub Oil Seal |
| Car Model: | NKR55 | Engine Model: | NKR55 |
| Condition: | 100% Brand New | Size: | Standard |
| Weight: | Standard | Origin: | China Mainland |
Primary Applications:
| Brand | Model | Chassis | Engine | Years |
|---|---|---|---|---|
| ISUZU | ELF | NKR55 | 4JB1 | 1986-2007 |
| ISUZU | ELF 100P | NKR | 4JB1 | 1990s-2000s |
| ISUZU | ELF 600P | NKR | 4JB1 | 1990s-2000s |
| ISUZU | NKR | NKR | 4JB1 | 1986-2007 |
| ISUZU | NPR | NPR | 4JB1 | 1986-2007 |
| ISUZU | NLR85 / NMR85 | -- | 4JJ1 | 2006-Present |
Non-ISUZU Applications (Same Platform):
| Brand | Model | Application |
|---|---|---|
| JMC | 1030 | Light Truck |
| JMC | 1040 | Light Truck |
- This oil seal is designed for the 76×102×22 mm application. Confirm the dimensions of your original oil seal before ordering.
- The ISUZU N-Series rear hub uses one inner oil seal per side. Verify the required quantity before ordering.
- Oil seals should be replaced in pairs (both sides of the rear axle) to maintain balanced bearing protection.
- For right-hand drive (RHD) vehicles, verify clearance and orientation. Refer to the ISUZU workshop manual for the correct procedure.
| Feature | Benefit + Verification Signal |
|---|---|
| Dual-Lip Metal-Cased Design | Primary sealing lip retains gear oil while secondary dust lip blocks water and debris — verified by product specification and functional testing. |
| NBR (Nitrile Butadiene Rubber) | Excellent resistance to gear oil, grease, and high temperatures (−40°C to +120°C) — verified by ASTM D471 immersion testing and material certificate. |
| OEM-Exact 76×102×22 mm Dimensions | Precision-matched to the ISUZU NKR/NPR rear hub bore — direct press-fit installation without modification — verified by CMM dimensional inspection. |
| Spring-Loaded Lip | Maintains consistent contact pressure on the axle shaft surface for reliable sealing at all operating speeds — verified by functional testing. |
| ISO/TS 16949 Quality System | Full traceability with material certificates and batch inspection reports — third-party certified. |
| Installation Success Rate ≥ 99% | Based on repair order tracking — confirms reliable fitment across the NKR55/100P/600P platform. |
| QC Item | Verification Method / Standard |
|---|---|
| Inner Diameter (76 mm) | CMM, 100% inspection |
| Outer Diameter (102 mm) | CMM, 100% inspection |
| Height (22 mm) | CMM, 100% inspection |
| Lip Geometry Angle | Optical comparator, 100% inspection |
| Material Hardness (Shore A) | Durometer, batch sampling |
| Fluid Immersion Resistance | ASTM D471 — 70h @ 100°C in gear oil |
| Compression Set | ASTM D395 — 70h @ 100°C |
| Tensile Strength | ASTM D412, batch sampling |
| Metal Case Bonding | Peel test, batch sampling |
| Surface Finish | Visual inspection — no flash, no contamination |
| Batch Traceability | Material lot number + production date |
| Packaging Protection | Sealed bag + moisture barrier + carton |
Installation Guidelines — Reference ISUZU Workshop Manual
- Preparation: Raise the vehicle on a hoist. Remove the wheel and brake drum. Support the rear axle housing.
- Disassembly: Remove the axle shaft retaining nuts. Carefully withdraw the axle shaft assembly. Remove the old oil seal using a seal puller or pry bar.
- Inspection: Inspect the axle shaft sealing surface for wear, scoring, or pitting. Inspect the wheel bearing for wear or damage. Replace any damaged components.
- Cleaning: Clean the hub bore and axle shaft thoroughly. Remove all old seal material and grease.
- Installation: Coat the new oil seal lip with MP grease. Use a seal driver or socket that matches the seal outer diameter to press the seal into the hub bore until it is fully seated.
- Axle Shaft Installation: Carefully reinstall the axle shaft assembly. Tighten the axle shaft retaining nuts to 59 N·m (51 lb·ft) or as specified in the ISUZU workshop manual.
- Final Check: Verify the hub rotates smoothly without binding. Check for gear oil leakage at the seal.
- Road Test: Lower the vehicle and perform a road test to verify wheel bearing operation and noise levels.
Recommended Torque Values:
| Fastener | Torque |
|---|---|
| Axle Shaft Retaining Nuts | 59 N·m (51 lb·ft) |
| Rear Axle Flange Nuts | 245 N·m (181 lb·ft) |
Maintenance Schedule
- Every 10,000 km: Inspect oil seal for gear oil leakage. Check wheel bearing for abnormal noise or play.
- Every 40,000-50,000 km: Inspect wheel bearing condition. Replace oil seal if any leakage or damage is found.
- Whenever the wheel hub is removed: Always replace the oil seal with a new unit.
- When brake contamination is detected: Inspect oil seal immediately. Replace if any oil leakage is found.
- Standard Packaging: Sealed bag + moisture barrier + carton.
- Custom Packaging: Neutral box, color box, or customer-branded packaging.
- Suitable For: Wheel hub repair shops, ISUZU parts distributors, fleet maintenance centers.
- Supply Capacity: Stable batch supply with batch-level quality reports available.
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