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Need a Specific Part? Customization Available!

If you can't find the exact **Starter Relay**, solenoid, or any other **Engineering Machinery Accessories** you need, **Growshine International** offers **Customized Parts Development** for a wide range of **Heavy Equipment Spares** and **Automotive Components**. Contact us with your specifications for a tailored solution!

Product Overview: Reliable 12V Starter Relay

We proudly present the high-quality **Starter Relay** with part numbers **21M9-31100** and **21M931100**, essential for the reliable starting system of various heavy **Construction Machinery** and **Excavators**. This **12V Starter Relay** is engineered to meet stringent performance requirements, ensuring your **Earthmoving Machinery Components** operate effectively and minimize downtime. Our company, **Growshine International**, is a leading supplier of **Engineering Machinery Parts**, specializing in the global **Import Export Trade** of durable and cost-effective **Heavy Equipment Spares**. We ensure all our **Electrical Components** are ready for the demanding conditions of the construction site.

Key Product Specifications and Applications

The specified **Starter Relay** is a crucial part of the engine's electrical system, acting as an electrical switch that permits a small current from the ignition switch to control the much larger current required to activate the starter motor. The specific **Part Number** is 21M9-31100 (also searched as 21M931100). It is rated for **12V** DC operation, making it suitable for a wide range of heavy-duty applications, including excavators, bulldozers, and other heavy equipment. As a key player in the supply of **Heavy Truck Parts**, **Agricultural Machinery Parts**, and **Automotive Components**, **Growshine** guarantees the functionality and longevity of this **Starting System Solenoid**. We focus on providing the best **Equipment Maintenance** solutions and **Aftermarket Starter Relay** options.

We maintain a large inventory of **Engine Electrical Parts** and related **Construction Spare Parts**, supporting fast turnaround times for **Global Equipment Parts Supply** needs. Looking for more options? Check out our list of Garrett Turbocharger products – click here to view the full catalog!

Growshine International: Your Partner in Global Parts Trade

**Growshine International** (格莳国际) specializes in the **Import Export Trade** of high-quality **Engineering Machinery Accessories**, **Heavy Truck Spares**, **Agricultural Machinery Components**, and **Automotive Components**. Our commitment to excellence makes us a trusted provider of **Durable Starter Solenoid** units, **Reliable Electrical Components**, and **OEM Quality Relay** alternatives. We are dedicated to delivering **High-Quality Diesel Engine Parts** and ensuring smooth operation of your machinery through our comprehensive product range. We serve clients needing everything from **Excavator Electric Parts Supply** to complex **Heavy Duty Relay** units.

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Machinery Parts Glossary and Keyword Examples

• Fuel Injector: Delivers fuel to the engine's combustion chamber. Installed in the cylinder head.
  Example: Cummins QSB6.7 Fuel Injector, Cummins QSB6.7 Форсунка, Каминс QSB6.7 топливный инжектор. (重卡/Heavy Truck)

• Hydraulic Pump: Converts mechanical power into hydraulic energy for fluid movement. Installed in the hydraulic system.
  Example: Caterpillar 320D Hydraulic Pump, Caterpillar 320D Pompe Hydraulique, Катерпиллер 320D Гидравлический насос. (工程机械/Engineering Machinery)

• Track Roller: Supports the weight of the machine and guides the track chain. Installed in the undercarriage.
  Example: Komatsu PC200-8 Track Roller, Komatsu PC200-8 Galet de Chenille, Комацу PC200-8 Опорный каток. (工程机械/Engineering Machinery)

• Brake Shoe: Part of the braking system that presses against the wheel drum to create friction. Installed in the wheel assembly.
  Example: Sinotruk HOWO A7 Brake Shoe, Sinotruk HOWO A7 Sabot de Frein, Синотрук ХОВО A7 Тормозная колодка. (重卡/Heavy Truck)

• PTO Shaft (Power Take-Off): Transmits mechanical power between a tractor and an implement. Installed at the rear of the tractor.
  Example: John Deere 6155M PTO Shaft, John Deere 6155M Arbre de Prise de Force, Джон Дир 6155M Вал отбора мощности. (农机/Agricultural Machinery)

• Water Pump: Circulates coolant through the engine to prevent overheating. Installed on the engine block.
  Example: Toyota Corolla 2010 Water Pump, Toyota Corolla 2010 Pompe à Eau, Тойота Королла 2010 Водяной насос. (汽车/Automotive)

• Alternator: Generates electrical power to charge the battery and power the electrical system. Installed on the engine.
  Example: Volvo EC460B Alternator, Volvo EC460B Alternateur, Вольво EC460B Генератор. (工程机械/Engineering Machinery)

• Turbocharger: Increases engine power by forcing extra air into the combustion chamber. Installed on the exhaust manifold.
  Example: Mercedes-Benz Actros MP4 Turbocharger, Mercedes-Benz Actros MP4 Turbocompresseur, Мерседес-Бенц Актрос MP4 Турбокомпрессор. (重卡/Heavy Truck)

• Tie Rod End: Part of the steering mechanism that connects the steering rack to the steering knuckle. Installed in the suspension system.
  Example: Ford F-150 2018 Tie Rod End, Ford F-150 2018 Embout de Biellette de Direction, Форд F-150 2018 Наконечник рулевой тяги. (汽车/Automotive)

• Tillage Disc: Used in plows and harrows to cut and turn soil. Installed on the implement frame.
  Example: Case IH 8420 Tillage Disc, Case IH 8420 Disque de Labourage, Кейс ИХ 8420 Диск плуга. (农机/Agricultural Machinery)

Need other **Hydraulic Products**? Click here for our Hydraulic Products list. Also, explore our wide range of Hydraulic Pump related products!

Troubleshooting: Common Heavy Machinery Fault (Excavator)

Fault: A **Caterpillar 336 Excavator** fails to start, but the battery is charged and the key turns to the start position. You hear a single "click" sound.

Processing Solution: This symptom often indicates a failure in the **Starter Relay** or **Starter Solenoid** (like the **21M9-31100**). The "click" is the relay engaging, but not enough current is flowing to the starter motor.
           Steps: 1. Check the battery cables and terminals for corrosion or looseness. 2. Test the **12V Starter Relay (21M931100)** circuit with a multimeter to confirm if power is reaching the starter motor terminal when the key is turned. 3. If the relay is receiving power but not passing sufficient current to the starter, the relay or solenoid is likely defective and requires replacement. Ensure you use an **OEM Quality Relay** for long-term reliability.

We also offer a range of reliable **Denso Relays**! Check out our promotional list for models like **156700-1840**, **156700-2190**, **156700-3250**, and **156700-2770**. Click to see our Denso Relay Special Offer!

Explore our **KALMAR Product List** for material handling parts. View KALMAR Products Here!

Need **Caterpillar Products**? Find all your needs here! Caterpillar Parts List - Click to Explore!

Growshine International is committed to providing **Global Equipment Parts Supply** and efficient **Import Export Trade** services for **Engineering Machinery Accessories**, **Heavy Truck Spares**, **Agricultural Machinery Components**, and **Automotive Components**. We ensure you receive high-quality, reliable parts like the **21M9-31100 Starter Relay** for continuous operation and **Equipment Maintenance**.

                                   由广数供应链（CGSC）团队提供运营方案