Isuzu 6HK1 engine oil pump drive gear 8-97601153-1, Sany material code: 60311979

Isuzu 6HK1 Engine Oil Pump Drive Gear 897601-1531, Sany Material Code: 60311979
Core Information
- OEM Number: 8-97601153-1 (897601-1531)
- Sany Material Number: 60311979
- Compatible Engines: Isuzu 6HK1 (Electronically Injected / Direct Injected), also compatible with 4HK1 models
- Tooth Count: 32 teeth (Z=32), Fuel Injection Pump / High-Pressure Oil Pump Drive Gear
- Function: End-stage power output of the timing system, directly drives the high-pressure fuel pump / injection pump, controlling fuel injection timing and pressure. It is a critical transmission component in the fuel supply system of electronically injected engines.
- Compatible Models: Sany SY305/SY335/SY365/SY375; Hitachi ZX330/350/360; Sumitomo SH350, etc., excavators equipped with 6HK1 engines.
- Material: Forged from high-strength alloy steel, tooth surface hardened by high-frequency quenching (HRC58-62). Wear-resistant, impact-resistant, and less prone to tooth breakage, suitable for high-torque conditions of high-pressure oil pumps.
Key Features
- Structure: Single-stage 32-tooth helical gear with keyway for positioning. Driven through the timing idler gear set, forming a precise transmission chain with the crankshaft gear and idler gears.
- Installation Location: At the end of the timing gear chamber, on the high-pressure oil pump shaft end, directly driving the injection pump.
- Precision: Dynamically balanced, with minimal transmission error, ensuring accurate fuel injection timing and preventing engine power deficiency and excessive black smoke.
- Interchangeability: Only compatible with 6HK1/4HK1 electronically injected models. Not interchangeable with oil pump idler (34 teeth), timing idler (61 teeth), or crankshaft gear (42 teeth).
Purchase and Installation Notes
- Code Verification: Confirm 897601-1531 + 60311979 + Z=32. Distinguish between direct injection and electronic injection models' oil pump drive gears.
- Replacement Timing: Check and replace synchronously during engine overhaul, when fuel injection timing deviation occurs, power drops significantly, excessive black smoke is emitted, or abnormal noise from the high-pressure oil pump is heard.
- Installation Focus:
1. Ensure the gear timing mark aligns with the marks on the idler and crankshaft gear to guarantee accurate fuel injection timing.
2. Maintain standard clearance between the gear and oil pump shaft. Ensure proper keyway installation to prevent slippage or skipping teeth.
3. Tighten bolts to specified torque (generally 45–55 N·m), tightening in stages evenly to prevent loosening.
- Fault Correlation: When experiencing engine power deficiency, unstable idle, heavy exhaust black smoke, incorrect fuel injection timing, or abnormal noise from the high-pressure oil pump, prioritize inspecting or replacing this 32-tooth oil pump drive gear for wear or tooth breakage.