Explore More Reliable Parts at Our Taobao Store! Click to Visit Growshine Store Now!        

           Wholesale Inquiries Welcome! Click to See Our 1688 Offerings! Great Prices on Bulk Orders!        

Need a Specific Part Like This Starter Relay?

We Support Custom Development and Manufacturing for a Wide Range of Spare Parts, including Electrical Relays, Solenoids, Sensors, and Hydraulic Components. Contact Growshine International with your requirements!

Product Details: Growshine Starter Relay R 21Q4-20100 (21Q420100)

Growshine International is proud to present the high-quality Starter Relay R 21Q4-20100, also known as 21Q420100. This critical electrical component is specifically designed for Modern construction equipment, ensuring reliable starting performance for excavators and other heavy machinery. As a leading supplier of engineering machinery parts, we prioritize quality and durability.

This Modern excavator electrical part is a perfect replacement, meeting the strict standards required for heavy-duty applications. Our commitment to providing reliable heavy equipment spares means you get a product that is built to last, reducing downtime and maintenance costs. We are your trusted partner for wholesale construction parts and reliable machinery parts.

Key Specifications and Applications

• Part Number: R 21Q4-20100, 21Q420100

• Brand: Growshine, Modern

• Product Type: Starter Relay / Solenoid Switch

• Application: Modern Excavators and Heavy Machinery

At 格莳国际 (Growshine International), we specialize in the import export trade of essential parts for construction, transportation, and agriculture. Our product range includes heavy truck parts, agricultural machinery parts, and auto parts. We stock a wide variety of components such as excavator hydraulic pump parts, heavy duty transmission parts, loader final drive parts, dozer undercarriage components, engine overhaul kits, Diesel engine fuel injectors, off-road vehicle suspension parts, tractor gearbox components, and mining equipment replacement filters.

Keywords: Modern excavator starter relay replacement, R 21Q4-20100 price, buy 21Q420100 relay online, Growshine heavy equipment electrical parts, quality engineering machinery parts supplier, global trade heavy truck spare parts, reliable agricultural tractor components, automotive engine management systems parts, China heavy duty construction equipment parts, hydraulic system components for excavators, original quality heavy truck brake parts, OEM replacement farm machinery parts, high performance auto engine parts supplier, genuine excavator solenoid valve, diesel fuel pump parts wholesale, construction equipment wear parts export, truck air conditioning system parts, earthmoving machinery undercarriage parts, reliable sensor for construction equipment, industrial vehicle electrical components.

Special Offer on Denso Relays!

For your full range of electrical needs, check out our selection of Denso Relays, including models 156700-1840, 156700-2190, 156700-3250, and 156700-2770. Don't miss out on this promotional price!

           Click Here to View Denso Relays and Purchase!        

Accessory Glossary (Engineering Machinery & Truck Parts)

1. Turbocharger (涡轮增压器, Турбонагнетатель): Increases engine power by forcing extra air into the combustion chamber. Komatsu PC300-8 Turbocharger.

2. Hydraulic Pump (液压泵, Гидравлический насос): Converts mechanical power into hydraulic energy, located in the main pump assembly. Caterpillar 320D Hydraulic Pump.

3. Fan Motor (风扇马达, Вентиляторный двигатель): Drives the cooling fan, typically located near the radiator. 卡特彼勒 345D 风扇马达, Caterpillar 345D Fan Motor, Вентиляторный двигатель Caterpillar 345D.

4. Brake Caliper (刹车卡钳, Тормозной суппорт): Squeezes brake pads against the rotor to slow down the vehicle, part of the braking system. Volvo FH16 Brake Caliper.

5. Fuel Injector (燃油喷射器, Топливная форсунка): Delivers fuel into the engine's cylinders, located in the engine fuel system. Cummins ISX Fuel Injector.

Accessory Glossary (Agricultural & Auto Parts)

6. Tie Rod End (横拉杆球头, Наконечник рулевой тяги): Connects the steering rack to the wheel hub, part of the steering linkage. John Deere 6155R Tie Rod End.

7. Shock Absorber (减震器, Амортизатор): Dampens vehicle suspension movement, installed at each wheel. Toyota Camry Shock Absorber.

8. Glow Plug (火花塞, Свеча накаливания): Used to heat the combustion chamber to aid in starting diesel engines, located in the cylinder head. Deutz Fahr Agrotron Glow Plug.

9. Water Pump (水泵, Водяной насос): Circulates coolant through the engine and radiator, located on the engine block. Mercedes-Benz Actros Water Pump.

10. Solenoid Valve (电磁阀, Электромагнитный клапан): Controls the flow of fluid or gas, often found in hydraulic or pneumatic systems. Hitachi ZX200-3 Solenoid Valve.

Find More Essential Parts

Need a Garrett Turbocharger? Click Here for Our List! |        Looking for KALMAR Products? Browse Our KALMAR Inventory! |        Explore Our Full Range of Hydraulic Products: View Hydraulic Parts! |        Specific Hydraulic Pump Related Products: See Hydraulic Pumps! |        All Caterpillar Products: Check Caterpillar Parts Here!

Growshine International Business Scope

Growshine International (格莳国际) is a dedicated global trading company specializing in the import and export of high-quality spare parts. Our core business revolves around providing reliable engineering machinery parts, heavy truck parts, agricultural machinery parts, and automobile accessories. We connect manufacturers with end-users worldwide, offering competitive pricing and exceptional service. We focus on components like this Starter Relay R 21Q4-20100 21Q420100, ensuring your equipment stays operational.

Our goal is to be the premier supplier for excavator maintenance parts, truck engine overhaul kits, tractor filtration systems, heavy equipment electrical parts, and more. We handle complex logistics to deliver parts like Modern excavator replacement parts directly to your job site or warehouse.

Heavy Truck Fault Diagnosis and Solution: Volvo FH12

Fault: Volvo FH12 Heavy Truck – Intermittent starting issue, sometimes no crank when turning the key, but battery is fully charged. This often indicates a fault with the Starter Solenoid/Relay.

Possible Cause: The starter relay (similar to the R 21Q4-20100 21Q420100 for Modern) or the starter solenoid contacts are worn, corroded, or sticking. This prevents the high current from reaching the starter motor.

Solution:

1. First, check the voltage and ground connection at the starter relay when the ignition is turned to the start position.

2. If the control signal is present, the relay or solenoid is likely faulty.

3. Replace the faulty component with a reliable heavy truck electrical part. For severe cases or continuous intermittent issues, a full replacement of the Volvo FH12 Starter Motor assembly may be required. Always use quality replacement parts from suppliers like Growshine.

           由广数供应链（CGSC）团队提供运营方案