8-97179770-1 Starter Pinion Gear Assembly 11 Teeth for ISUZU NPR 4HF1 4HG1 Starter Clutch Assembly OEM 8971797701
| Tooth Count: | 11 Teeth | Net Weight: | 1.014 Kg |
| Gear Outer Diameter: | 40 Mm | Assembly Length: | 104 Mm |
| Material: | Metal | Engine Compatibility: | ISUZU 4HF1, 4HG1 |
| OEM Part Number: | 8-97179770-1 / 8971797701 | Interchangeable Reference: | 8-97179770-0 / 8971797700, 8971617930, 8-98222100-0 |
| High Light: | 8-97179770-1 Starter Pinion Gear Assembly,11 Teeth Starter Clutch Assembly,ISUZU NPR 4HF1 4HG1 Pinion Gear |
||
Starter Pinion Gear Assembly 8-97179770-1 (8971797701) for ISUZU NPR 4HF1 / 4HG1 diesel engines — a direct-fit OEM replacement with 11 teeth, interchangeable with 8-97179770-0.
The Starter Pinion Gear Assembly with OEM number 8-97179770-1 (8971797701) is a direct-fit replacement for ISUZU NPR trucks equipped with the 4HF1 and 4HG1 diesel engines. This pinion gear engages the flywheel ring gear during engine cranking, transmitting starter motor torque to rotate the engine until it fires.
When the starter solenoid is energized, it pushes the pinion gear forward along the starter shaft to mesh with the flywheel ring gear. The starter motor then spins the pinion, which rotates the flywheel and cranks the engine. Once the engine starts, the pinion retracts to prevent damage. A worn pinion — chipped teeth, a worn engagement chamfer, or sticking on the shaft — causes grinding noises during cranking or failure to engage the flywheel.
- ConfirmedTooth Count: 11 teeth — consistently listed across multiple independent aftermarket sources for this OEM family.
- ConfirmedNet Weight: 1.014 kg — recorded in supplier product data for this assembly.
- VerifiedOEM Cross-Reference: Replaces 8-97179770-1 / 8971797701. Interchangeable references include 8-97179770-0 / 8971797700, 8971617930, and 8-98222100-0 (verify application before ordering).
- CautionDimensional Data Conflict: Length is listed as 104 mm by one supplier, while gear outer diameter is listed as 40 mm by another. These may refer to different measurement points (assembly length vs. gear OD). Request a dimensional drawing from the seller if precise fitment is critical.
- CautionApplication Scope Clarification: While 8-97179770-1 is primarily listed for NPR 4HF1/4HG1, the related number 8-97179770-0 also appears for NKR/NPR 4JJ1T/4HF1 and NQR71/NQR75 applications. Confirm your exact model and engine code before ordering.
- Grinding or metallic screeching noise during engine cranking
- Starter motor spins but engine does not crank (pinion not engaging flywheel)
- Pinion sticks in engaged position after engine starts (continued grinding)
- Visible chipped, worn, or missing teeth on the pinion gear
- Intermittent no-crank condition with a known-good starter motor
| Part Number | 8-97179770-1 |
|---|---|
| Product Name | Starter Pinion Gear Assembly |
| Car Model | NPR |
| Engine Model | 4HF1 / 4HG1 |
| Condition | 100% Brand New |
| Material | High-strength aluminum alloy & precision bearings |
| Cooling Type | Engine coolant circulation |
| Installation | Direct OEM replacement |
| Quality Standard | OEM equivalent / ISO quality control |
| Weight | Standard (1.014 kg reference) |
| Origin | China Mainland |
| Main Market | Middle East, Asia, Africa, South America, North America & Europe |
| Package | Neutral packing or made as requested |
| Warranty | 6 months |
| Price & Stock | Please contact us for more information |
| Feature | Benefit & Verification Signal |
|---|---|
| 11-tooth pinion | Matches OEM flywheel engagement for reliable cranking — tooth count confirmed across multiple aftermarket listings. |
| 1.014 kg assembly weight | Consistent across supplier data — indicates stable part specification. |
| Interchangeable with 8-97179770-0 and related numbers | Increases sourcing flexibility — cross-reference confirmed by supplier data. |
| ISO/TS16949 supplier certification (listed) | Indicates manufacturing quality system compliance — certification referenced by one supplier. |
| Brand | Model | Engine Code | Notes |
|---|---|---|---|
| ISUZU | FSR / FSR 500 | 6HE1 | Primary fitment per OEM number |
| ISUZU | FVR / FTR | 6HE1 (verify) | Some cross-applications reported; confirm by VIN |
⚠️ Important Fitment Notes
HDA-008 / MC828264 are aftermarket cross-reference numbers that appear primarily in Mitsubishi Fuso brake booster catalogs. This product is primarily oriented toward ISUZU FSR 6HE1 fitment; the numbers above are listed for customer cross-comparison only.
If your vehicle is a Mitsubishi Fuso FK/FM with an MC828264 booster, confirm pushrod length and mounting bolt pattern match before ordering. Both "short" and "long" pushrod variants exist within the MC828264 family.
Always provide your VIN/chassis number for verification. Do not rely solely on cross-reference numbers.
| QC Item | Verification Method |
|---|---|
| Tooth count | Visual / gauge check per production batch (11T confirmed) |
| Tooth profile and chamfer | Sampled inspection against reference sample |
| Assembly weight | Check against 1.014 kg reference |
| Engagement / clutch function | Sampled functional test — confirm with seller if test data is available |
| Visual defects (chipped teeth, cracks) | 100% visual inspection under magnification |
| Packaging integrity | Carton condition check per shipment |
⚠️ IMPORTANT: Starter replacement involves high-current electrical connections and mechanical engagement with the flywheel. Disconnect the battery negative terminal before service. Professional workshop installation is recommended.
- Disconnect the battery negative terminal.
- Disconnect the starter electrical connections (B+ cable, solenoid signal wire).
- Remove the starter mounting bolts; support and remove the starter assembly.
- If replacing only the pinion gear: disassemble the starter per the workshop manual, remove the old pinion/clutch assembly, and install the new unit. Confirm engagement direction and shaft fit.
- Reinstall the starter; torque the mounting bolts to OEM specification (confirm the exact value in the manual).
- Reconnect the electrical terminals; verify the B+ nut torque.
- Test cranking operation before road test. Listen for smooth engagement without grinding.
- Inspect the starter pinion and flywheel ring gear teeth during any transmission or clutch service.
- Replace the pinion if teeth are chipped, worn, or engagement is intermittent.
- Check starter mounting bolts and electrical connections at every major service interval.
King Pin Kit KP233 MI-10 for ISUZU 4JB1 NKR NPR 5-87830978-0 5878309780
King Pin Kit KP233 MI-10 for ISUZU 4JB1 NKR NPR 5-87830978-0 5878309780 Part Number: 5-87830978-0 5878309780 Product Name: King Pin Kit Car Model: ISUZU NKR NPR Engine Model: ISUZU 4JB1 Condition: 100% Brand New Size: Standard Weight: Standard Origin: China Mainland Main Market: Middle East ,Asia...
King Pin Set KP-224 MI-52 1-87830064-0 1878300640 For ISUZU FSR113 6BD1
High-quality King Pin Set 1-87830064-0 for ISUZU FSR113 trucks with 6BD1 engine. OEM-equivalent steering repair set designed for heavy-duty operation and long service life. Part Number: 1-87830064-0 1878300640 Product Name: King Pin Set Car Model: ISUZU FSR113 Engine Model: ISUZU 6BD1 Condition: 100...
Truck Kp222 King Pin Kits 1-87830039-0 Mi-56 Tk50rc Bearing 1878300390 For Isuzu Cvr Fvr
High-quality King Pin Kit KP222 for ISUZU CVR and FVR trucks. OEM-equivalent steering repair kit including bearings, designed for heavy-duty use and long service life. Part Number: 1-87830039-0 1878300390 Product Name: King Pin Kits Car Model: ISUZU Cvr Fvr Engine Model: ISUZU Cvr Fvr Condition: 100...
Wheel Hub Bolt for ISUZU NPR 4HF1 700P 8943833360 8-94383336-0
Wheel Hub Bolt for ISUZU NPR 4HF1 700P 8943833360 8-94383336-0 Part Number: 8943833360 8-94383336-0 Product Name: Wheel Hub Bolt Car Model: ISUZU NPR 700P Engine Model: ISUZU 4HF1 4HK1 Condition: 100% Brand New Size: Standard Weight: Standard Origin: China Mainland Main Market: Middle East ,Asia...
