Isuzu 6HK1 engine pulley 1-11237145-8, Sany material code: B229900005128

Isuzu 6HK1 Engine Pulley 112371-4581, Sany Material Code: B229900005128
Core Information
- OEM Number: 1-11237145-8 (112371-4581)
- Sany Material Number: B229900005128
- Compatible Engines: Isuzu 6HK1 (Electronically Injected / Direct Injected), Partially Compatible with 4HK1
- Type: Crankshaft Dampening Pulley (Damper Wheel), 6PK/8PK Multi-V groove
- Material: Ductile Cast Iron + Rubber Damping Layer, High Rigidity, Vibration and Noise Reduction, Anti-Resonance Cracking
- Functions:
1. Power Transmission: Drives accessories such as fan, water pump, generator, and air conditioning compressor
2. Vibration Damping: Absorbs crankshaft torsional vibrations, protects crankshaft and belt, reduces abnormal noise
3. Speed Reference: Equipped with timing signal teeth to provide speed/phase signals to ECU (Electronically Injected Version)
- Compatible Models: Sany SY305/SY335/SY365/SY375; Hitachi ZX330/350/360; Sumitomo SH350 and other 6HK1 models
Key Parameters
- Outer Diameter: Approximately 190mm
- Groove Count: 6 grooves (6PK), compatible with 6PK1155/6PK1240 belts
- Installation Holes: 4 M12 bolts, pitch circle diameter 150mm
- Damping Structure: Rubber Vulcanized Damping Layer, Damping Efficiency ≥30%
- Weight: Approximately 8.5kg
- Interchangeability: Only compatible with 6HK1/4HK1 Electronically Injected models; Direct Injected 6HK1 uses 112371-5480, do not mix use
Purchase and Installation Notes
- Code Verification: Confirm 112371-4581 + B229900005128, distinguish between Electronically Injected/Direct Injected, groove count, and presence of signal teeth
- Replacement Timing: Replace when rubber cracks/detaches, belt slips/noises, excessive vibration, accessory drive failure, or signal abnormalities occur
- Installation Focus:
1. Clean crankshaft conical surface of oil, align locating key
2. Tighten bolts diagonally in stages, torque 180–200N·m, apply anti-loosening compound
3. Belt Tension: 6PK belt tension 800–1000N, avoid excessive tightness causing belt tearing or excessive looseness causing slippage
- Fault Association: Prior check this pulley for engine front-end noise, frequent belt breakage, unstable generator charging, intermittent air conditioning cooling, and large idle vibration