Part Name: Starter Relay
Part No: E312
Applicable Models: CAT
Delivery Options : Express freight / Standard (sea) Freight
Condition/Options: New/ OEM replacement / Genuine original
Warranty : 6 months
MOQ : 1 Piece
Growshine Premium Starter Relay 3G-2720 3G2720 for Caterpillar CAT E312 Excavator Electrical Parts
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Need a Specific Design? We Offer Customization!
Whether it's a Starter Relay for an Excavator, a sensor for a Heavy Truck, or a complex part for Agricultural Machinery, Growshine International supports custom development and production of various spare parts to meet your unique specifications. Your ideal Aftermarket Replacement Part solution starts here!
Essential Electrical Component: CAT E312 Starter Relay
Growshine International, a leading supplier in Engineering Machinery Parts and Heavy Truck Parts, proudly offers this high-quality Starter Relay for Caterpillar (CAT) E312 Excavator. This critical electrical component, essential for the engine starting circuit, ensures reliable performance for your heavy equipment. The official CAT part number is 3G-2720, and we also recognize the non-hyphenated version 3G2720 for easier searching. As experts in Auto Parts Export, we guarantee a reliable replacement part, focusing on providing excellent Heavy Equipment Spare Parts Supplier solutions globally.
Growshine International: Your Global Parts Partner
Growshine International (格莳国际) specializes in the import and export trade of comprehensive spare parts including Engineering Machinery Accessories, Heavy Duty Truck Components, Agricultural Machinery Parts, and Automotive Components. Our mission is to be your primary source for Quality Aftermarket Parts. Key product applications include: excavator engine electrical system components, Caterpillar E312 starter solenoid replacement, affordable tractor hydraulic pump repair kit, Cummins heavy-duty diesel engine oil cooler, Volvo truck clutch release bearing price, JCB backhoe loader gear pump, Komatsu excavator swing motor seal kit, Deutz F3L912 engine air filter element, Isuzu NPR truck brake master cylinder, John Deere combine harvester knife guard, Sinotruk HOWO cab suspension shock absorber, Dozers undercarriage track roller assembly, Kobelco SK200-8 main control valve parts, Perkins engine fuel injection pump supplier, ZF transmission spare parts for bus, Mercedes-Benz heavy-duty truck axle shaft, CASE loader fuel water separator filter, Global Parts Sourcing for construction equipment, reliable generator alternator repair kit, and CAT engine overhaul gasket set price.
Denso Relay Cross-Reference and Essential Product Links
While focusing on the CAT E312 Starter Relay 3G-2720, we also supply a comprehensive range of electrical components. Check out our cross-referenced Denso Relays for various applications: 156700-1840, 156700-2190, 156700-3250, and 156700-2770.
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Key Component Terminology Reference
Understanding the precise name and function of parts is crucial for sourcing. Here are examples of parts we supply for various equipment:
Fan Motor: Installed on the cooling system, used to drive the fan for heat dissipation. Example: Caterpillar 345D Fan Motor (Chinese: 卡特彼勒 345D 风扇马达, Russian: Вентиляторный двигатель Caterpillar 345D).
Alternator: Located on the engine, generates electrical power and charges the battery. Example: Volvo FH16 Alternator (Chinese: 沃尔沃 FH16 交流发电机, Russian: Генератор Volvo FH16).
Fuel Injector: Installed in the cylinder head, sprays fuel into the engine combustion chamber. Example: John Deere 8320R Fuel Injector (Chinese: 约翰迪尔 8320R 燃油喷射器, Russian: Форсунка John Deere 8320R).
Brake Pad: Located in the brake caliper, applies friction to the rotor to slow the vehicle. Example: Toyota Camry Brake Pad (Chinese: 丰田凯美瑞 刹车片, Russian: Тормозная колодка Toyota Camry).
Track Roller: Part of the undercarriage, guides and supports the track link on crawler equipment. Example: Komatsu PC300-7 Track Roller (Chinese: 小松 PC300-7 支重轮, Russian: Опорный каток Komatsu PC300-7).
Air Compressor: Installed on the heavy truck engine, supplies compressed air for the braking system. Example: Sintotruk HOWO Air Compressor (Chinese: 中国重汽 豪沃 空气压缩机, Russian: Воздушный компрессор Sinotruk HOWO).
Tie Rod End: Part of the steering linkage, connects the steering rack to the wheel hub. Example: Ford F-150 Tie Rod End (Chinese: 福特 F-150 拉杆球头, Russian: Наконечник рулевой тяги Ford F-150).
Water Pump: Located on the engine, circulates coolant to regulate engine temperature. Example: Caterpillar D8T Water Pump (Chinese: 卡特彼勒 D8T 水泵, Russian: Водяной насос Caterpillar D8T).
Hydraulic Cylinder Seal Kit: Used inside the hydraulic cylinder (e.g., boom, arm), prevents fluid leakage. Example: Hitachi Zaxis 210LC Hydraulic Cylinder Seal Kit (Chinese: 日立 Zaxis 210LC 液压缸密封件, Russian: Комплект уплотнений гидроцилиндра Hitachi Zaxis 210LC).
Transmission Filter: Installed in the transmission, cleans the transmission fluid. Example: JCB 3CX Transmission Filter (Chinese: JCB 3CX 变速箱滤清器, Russian: Фильтр трансмиссии JCB 3CX).
Heavy Equipment Troubleshooting: Starter Motor Failure
Equipment/Model: Caterpillar D6T Dozer
Failure Description: The engine does not crank when the key is turned, but the lights and dashboard are functional.
Probable Cause: A common reason is a faulty Starter Relay (Solenoid), like the 3G-2720 discussed. If the relay contacts are burned or the coil is open, it will not pass the high current needed to spin the starter motor. Another cause could be a dead battery (despite working lights) or a faulty ignition switch.
Solution:
Check the battery voltage under load.
Inspect all connections from the battery to the Starter Motor and the Starter Relay for corrosion or looseness.
Test the Starter Relay (3G2720) by applying power and ground to the coil terminals to check for an audible click and continuity across the power terminals. If it fails, replace it with a high-quality Growshine replacement part.
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