Forged Steel (42CrMo) Idle Gear Shaft with Z=41 Teeth - OEM Direct-Fit Replacement for ISUZU 6HK1 4HK1 Timing Gear Train
| Teeth: | Z=41 | Material: | Forged Steel (42CrMo) |
| Net Weight: | 0.15–0.31 Kg | Installation Torque: | 31 N·m (3.2 Kgf·m / 23 Lb Ft) |
| Engine Compatibility: | 6HK1 / 4HK1 / 4HG1 | Timing Position: | Gear Shaft B (Position 107B) |
| High Light: | Forged Steel Idle Gear Shaft,Z=41 Teeth Gear Shaft B,OEM Direct-Fit Timing Gear Shaft |
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Engine Idle Gear Shaft 8-97186398-1 8971863981 for ISUZU FVR FRR FSR EXZ 700P NPR NQR 6HK1 4HK1 4HG1 Diesel Engine — OEM Equivalent Direct-Fit Replacement with Forged Steel Construction
| Part Number | 8-97186398-1 8971863981 |
|---|---|
| Product Name | Idle Gear Shaft |
| Car Model | FVR FRR 700P |
| Engine Model | 6HK1 4HK1 |
| Condition | 100% Brand New |
| Material | High-strength aluminum alloy & precision bearings |
| Cooling Type | Engine coolant circulation |
| Quality Standard | OEM equivalent / ISO quality control |
| Brand | Model | Engine | Years |
|---|---|---|---|
| ISUZU | FVR | 6HK1 | 2008+ |
| ISUZU | FRR | 6HK1 | Same as above |
| ISUZU | FSR | 4HK1 | Same as above |
| ISUZU | EXZ | 6HK1 | Same as above |
| ISUZU | 700P | 4HK1 / 6HK1 | Same as above |
| Brand | Equipment Model | Engine |
|---|---|---|
| Hitachi | ZX200 / ZX210 / ZX240 / ZX330 / ZX350, etc. | 4HK1 / 6HK1 |
| JCB | Various excavators | 4HK1 / 6HK1 |
| Case | CX210 / CX230 / CX300 / CX330, etc. | 4HK1 / 6HK1 |
| Denyo | DCA-125 Generator | 4HK1 / 6HK1 |
- Before ordering, verify that your original idle gear shaft's timing position (Shaft A/B/C/D), outside diameter, and oil passage hole position match the product
- 8-97186398-1 and 8-97186398-0 are adjacent variant numbers for different 6HK1/4HK1 engine configurations
- This idle gear shaft is also used in Hitachi and JCB construction machinery with 4HK1/6HK1 engine applications
- For fitment confirmation, please provide VIN number or engine nameplate photo
| QC Item | Verification Method |
|---|---|
| Journal outside diameter accuracy | Micrometer measurement against OEM specs |
| Journal surface roughness | Surface roughness tester |
| Gear mesh clearance | Feeler gauge / dial indicator inspection |
| Oil passage clearance | Air/oil flow test |
| Appearance & surface defects | Visual inspection + magnetic particle inspection |
| 100% factory testing | Piece-by-piece dimensional and visual inspection |
Refer to ISUZU 6HK1/4HK1 workshop manual for exact specifications:
- Clean the timing gear case interior; inspect the idle gear shaft mounting bore for wear or damage
- Inspect the new idle gear shaft journal for scratches or corrosion; verify oil passage is clear
- Install the idle gear shaft into the timing gear case locating bore, aligning the oil passage hole and dowel pin
- Install the idler gear and thrust plate; confirm gear mesh clearance is within specification
- Tighten idle gear shaft mounting bolts in a diagonal sequence to specified torque 31 N·m (3.2 kgf·m / 23 lb ft)
- Install the timing gear case cover; fill engine oil to the standard level
- Start the engine and check for abnormal noise from the timing gear train
- Inspect timing gear train noise and oil condition every 40,000 km
- Inspect idle gear shaft wear at 80,000-100,000 km or upon timing gear noise
- Under normal maintenance conditions, 6HK1/4HK1 idle gear shafts can exceed 200,000 km service life (varies by operating conditions and maintenance quality)
- Engine oil change recommended every 10,000-15,000 km to ensure proper timing gear train lubrication
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