Welcome to Growshine International, your trusted partner in the global trade of high-performance machinery parts. We are proud to present our premier Magnetic Switch Starter Relay, part numbers 3916302 and 3916302. This essential component is engineered for the robust Cummins 6CT series engine (also known as 6CTA / 8.3L), a powerhouse in the heavy-duty industry. Our expertise in sourcing and exporting construction machinery parts, heavy-duty truck parts, and agricultural machinery parts ensures you receive a product that delivers exceptional reliability and performance.

Product Specifications & Applications

The Growshine 3916302 Starter Relay is a critical part of your engine's electrical starting system. It acts as a high-current switch, channeling battery power to the starter motor to crank the engine. It is a direct replacement for Cummins engines and is widely used in various applications, including:

• Heavy-Duty Trucks: Dongfeng Kinland, Ford L-Series, Freightliner FL-Series

• Construction Machinery: Komatsu Excavators (e.g., PC300), Hyundai Excavators (e.g., R290LC), various wheel loaders and road rollers.

• Agricultural Machinery: Case IH tractors and other equipment powered by the Cummins 6CT engine.

As a leading supplier of automotive parts and diesel engine starter components, we guarantee this part meets rigorous quality standards for longevity and efficiency.

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Understanding Key Machinery Components

At Growshine International, we believe in empowering our clients with knowledge. Here are explanations for some vital machinery parts we handle in our import and export trade operations:

• Kenworth T800 Turbocharger: This is an air compressor that forces more air into the engine's cylinders. Mounted on the engine's exhaust manifold, it increases engine power and efficiency.

• Komatsu PC200-8 Excavator Hydraulic Filter: Located within the hydraulic system's return line or pressure line, this filter removes contaminants from the hydraulic fluid, protecting sensitive components like pumps and valves.

• John Deere 9770 Combine Harvester Fuel Injector: A critical component of the engine's fuel system, the injector atomizes fuel and sprays it directly into the combustion chamber for efficient burning. It is installed in the engine's cylinder head.

• Volvo VNL Truck EGR Valve: The Exhaust Gas Recirculation (EGR) valve is part of the vehicle's emissions control system. It redirects a small portion of exhaust gas back into the engine's cylinders to lower combustion temperatures and reduce NOx emissions. It's typically located on the intake or exhaust manifold.

• Hitachi ZAXIS 200 Excavator Swing Motor: This hydraulic motor is located in the excavator's upper structure (carbody) and is responsible for rotating the house 360 degrees on top of the undercarriage.

• Ford F-150 Alternator: Mounted to the front of the engine and driven by the serpentine belt, the alternator is an electrical generator that charges the battery and powers the vehicle's electrical systems while the engine is running.

• SHACMAN F3000 Dump Truck Air Brake Compressor: This engine-driven pump compresses air, which is then stored in tanks to power the truck's air brake system. It is a fundamental part of the vehicle's safety system.

• Case IH Magnum 340 Tractor Radiator: A key part of the cooling system, the radiator is located at the front of the tractor. It dissipates heat from the engine coolant that circulates through it, preventing the engine from overheating.

• Massey Ferguson 8700S Series Tractor Water Pump: Driven by the engine's belt system, this pump circulates coolant throughout the engine, radiator, and heater core to maintain optimal operating temperature.

• Bobcat S770 Skid Steer Loader Glow Plug: Found in diesel engines, a glow plug is a heating element in each cylinder's pre-combustion chamber. It heats the incoming air to help ensure a clean start in cold conditions.

Troubleshooting Guide: Engine Cranks But Fails to Start

Vehicle: Komatsu PC300-7 Excavator with a Cummins SAA6D114E Engine

Symptom: The operator turns the key, the starter motor engages and cranks the engine, but the engine does not fire up and run.

Possible Causes & Solutions:

1. Fuel System Issue: This is the most common culprit.

• Check Fuel Level: Ensure there is sufficient fuel in the tank.

• Inspect Fuel Filters: Clogged primary or secondary fuel filters can restrict fuel flow. Replace them if they appear dirty or if it has been a long time since the last service.

• Prime the Fuel System: Air may have entered the system. Use the hand priming pump on the fuel filter housing until you feel firm resistance, then try starting again.

• Check Fuel Shutoff Solenoid: This electronic valve controls fuel flow to the injection pump. Ensure it is receiving power and "clicking" when the key is turned on. The Magnetic Switch Starter Relay is part of this control circuit, and a faulty relay can prevent the solenoid from activating.

2. Electrical System Issue:

• Weak Battery: The battery might have enough power to turn the starter but not enough to power the Engine Control Module (ECM) and fuel injectors correctly. Test the battery voltage during cranking; it should not drop below 9.5V.

• Faulty Glow Plugs (in cold weather): If the ambient temperature is low, failed glow plugs can make starting very difficult. Test the glow plug circuit and individual plugs.

3. Air Intake System Issue:

• Clogged Air Filter: A severely blocked air filter can choke the engine of the air it needs for combustion. Check and replace the air filter if necessary.

By systematically checking these areas, you can effectively diagnose and resolve a "crank-no-start" condition, minimizing downtime for your heavy equipment.

Expand Your Sourcing with Growshine International

As specialists in the global trade of machinery parts, we offer a vast catalog beyond starter relays. We leverage our extensive network to provide high-quality components for various global brands. Explore our curated product lists from trusted partners and manufacturers to fulfill all your heavy equipment needs, from engine parts to hydraulic systems. We are experts in sourcing agricultural machinery components from China and are a top automotive electrical parts wholesale supplier.