Product Overview
4307475 Fuel Injector for ISG12 Engine - High-performance replacement component designed for optimal fuel delivery and engine efficiency.
Product Specifications
| Product Name | Fuel Injector |
| Part Number | 4307475 |
| Compatible Model | ISG12 |
| Type | Engine Parts |
| Brand | JIAJUE |
| Condition | New |
| Weight | 2KG |
| Dimensions | 16cm x 5cm x 8cm |
| Warranty | 3 Months |
| Shipping | Dispatched within 5 days |
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Frequently Asked Questions
How do I install my fuel injector after purchasing it?
Refer to the detailed "Step-by-Step Installation Guide" below for comprehensive installation instructions.
What precautions should I take before installing my fuel injector?
Ensure a dust-free installation environment, lubricate the O-ring with clean machine oil to prevent leaks, and verify correct O-ring positioning.
Why is my engine still unusable after replacing the fuel injector?
This typically occurs due to air trapped in the high-pressure oil rail. Cycle the engine in short bursts (under 30 seconds) to purge air. Multiple attempts may be needed to stabilize pressure.
Is my device compatible with this part number of fuel injectors?
For compatibility verification, provide your Engine Serial Number (ESN) for free confirmation.
How to determine if your fuel injectors need replacing?
- Cylinder Cut-out Test: Use diagnostic software (ET) to shut off cylinders individually and monitor engine speed changes
- Fuel Rail Pressure Test: Check for internal leaks preventing proper system pressure buildup
- Back-leakage Test: Excessive back-leakage indicates severe wear of internal control valve assembly
- Visual Inspection: Examine fuel injector nozzles for carbon buildup, blockage, or corrosion
How long will it take to receive my package after payment?
Delivery time varies by destination and customs processing. Contact us with your address and postal code for accurate shipping costs and delivery estimates.
Step-by-Step Installation Guide
HEUI (Hydraulic Electronic Unit Injection) systems are extremely sensitive to contamination. A single speck of dust can cause premature failure.
Preparation
Thoroughly clean injector bores. Remove all carbon debris, old O-rings, and fuel/oil residue from the seat bottom. Inspect injector sleeve for pitting or erosion.
Lubrication
Apply clean engine oil to the three O-rings and backup rings.
Never use grease. Only clean engine oil ensures seals slide in without tearing.
Seating the Injector
Push injector down firmly by hand until it "seats." Install hold-down clamp and bolt.
Torque Specifications
Tighten bolt to 30 N⋅m±7 N⋅m (22 lb-ft). Over-tightening can crack injector body; under-tightening causes combustion gas leakage.
Trim Code Programming
Locate 6-digit alphanumeric code on injector solenoid top. Use ET software to program this code into ECM for precise fuel delivery synchronization.
Troubleshooting Guide
| Issue |
Root Cause |
Solution |
| Black Smoke |
Poor spray atomization or stuck needle valve causing dripping |
Inspect air filter |
| Hard Start |
Internal leakage leading to insufficient starting oil pressure |
Inspect injector O-rings and internal seals |
| Engine Misfire |
Faulty solenoid valve coil or worn internal valve components |
Inspect wiring harness connections and replace damaged injectors |
Company Profile
GUANGZHOU JIAJUE MACHINERY EQUIPMENT CO., LTD
Guangzhou Jiajue is a specialized manufacturer, developer, and distributor of excavator parts. With years of expertise and continuous innovation, we supply thousands of excavator components including undercarriage parts, rubber parts, engine components, oil seals, consumable parts, iron parts, and hydraulic breakers across hundreds of applications with comprehensive product range and quality assurance.
We maintain our principle of developing superior quality products and providing exceptional service. We believe that high-quality products build strong brand reputation, and excellent service fosters lasting customer relationships. We sincerely look forward to cooperating with you and building stronger business partnerships.
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