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PC300 7回转泄压阀副图
PC300 7回转泄压阀
PC300 7回转泄压阀副图
PC300 7回转泄压阀

702-77-02120 Hydraulic Swing Motor Relief Valve for PC300-7 PC360-7

The swing motor pressure relief valve is a critical safety component that cushions the massive inertia of your 30-ton excavator's upper structure. When the operator releases the swing joystick, this valve absorbs the hydraulic shock, bringing the heavy machine to a smooth, controlled halt. A worn, scored, or sticking swing relief valve causes harsh, jarring stops, sluggish rotation, or catastrophic damage to the swing machinery's internal gears and the motor itself. Our brand-new replacement valves for the -7 series excavators restore factory-level rotational smoothness and braking precision, maximizing operational safety and protecting your expensive swing motor assembly.
  • 100% Brand New Construction: Forged from specialized, high-density alloy steel to withstand the immense continuous pressure spikes generated by the heavy upper-structure of 30-to-36-ton excavators.
  • Micron-Level Precision: CNC-machined internal spools provide zero-leakage sealing and immediate relief-response, eliminating harsh swing stops and destructive hydraulic shock.
  • Advanced Thermal Treatment: Internal valve components are deeply heat-treated to resist galling, scoring, and thermal fatigue caused by continuous, high-frequency rotational operations during heavy trenching.
  • Instant Inertia Cushioning: Calibrated to exact factory specifications for PC300-7 and PC360-7 machines, ensuring the immense rotational inertia is safely absorbed when the joystick is released.
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Comprehensive Product Line
From swing motor safety valves to complete main pump assemblies, we provide a full spectrum of hydraulic solutions for advanced heavy equipment platforms.
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Massive Inventory Ready
Time is money on the job site. We maintain a vast, warehouse-ready inventory of thousands of hydraulic assemblies and critical modules, ensuring your order is processed without delay.
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Heavy-Duty Export Packaging
Your high-value parts are protected. We utilize heavy-duty, anti-rust treatments and secure them in reinforced, fumigation-free wooden crates, ensuring safe and undamaged global delivery via sea or air freight.
Brand
YIKAN
Origin
Guangdong, China
Product Name
Fan motor
Model
PC300-7 Pressure Relief Valve
Part number
702-77-02120
Application field
Bulldozer
Warranty/Spare Parts
Six months
Quality
High guarantee
Status
100% new
Minimum order quantity
1 piece
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D31 Engine power:D31EX/PX-22: 58 kW 78 HP Weight: D31EX-22: 7670 kg 16,910 lb D31PX-22: 8130 kg 17,930 lb D37 Engine power:D37EX/PX-22: 66 kW 89 HP Weight: D37EX-22: 7890 kg 17,400 lb D37PX-22: 8240 kg 18,170 lb D39EX Engine power:79 kW 105 HP @ 2200 rpm Weight: D39EX-22: 9040 kg 19,930 lb D39PX-22: 9480 kg 20,900 lb D51EX-22 Engine power:130 HP@ 2200 rpm Weight:27778-28881lb D65 Engine power:154 kW 207 HP @ 1950 rpm Weight: D65EX-15E0 Standard track 20280 kg 44,710 lb D65EX-15E0 long tracks 21020 kg 46,340 lb D65PX-15E0 21000 kg 46,300 lb D65WX-15E0 21140 kg 46,610 lb D155AX-8 Engine power:268 kW 360 HP @ 1900 rpm Weight:39500 kg 87,100 lb D275 Engine power:306 kW 410 HP Weight:49850 kg 109,900 lb D375-6 Engine power:474 kW 636 HP @ 1800 rpm Weight:71640 kg 157,940 lb D475-5 Engine power:641 kW 860 HP Weight:102500kg 226,010 lb
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What We Do

Services we Offer

No matter what your hydraulic maintenance needs may be, we’re here to help. Contact us today to learn more about our
services and how we can assist you with all of your needs.
Processing

Processing

With years of experience in the processing industry, we offer full-chain customized processing services with our mature production system and stringent quality control standards! Whether you are conducting small-batch trial production of new products, large-scale OEM manufacturing, or customized processing of personalized products, you can enjoy a one-stop service from demand matching to finished product delivery, helping your products to be launched efficiently and quickly to the market. We boast an experienced production team and a modern processing workshop, proficient in various OEM processes including machining, stamping, injection molding, and assembly. We can adapt to the needs of various materials such as metal, plastic, and rubber, perfectly matching diverse industry scenarios including electronics, automotive parts, household goods, hardware tools, and medical devices. From product drawing analysis and processing technology planning to process execution, precision control, and finished product inspection, every step strictly adheres to industry standards, ensuring that the processed products meet precision standards, have stable quality, and strong consistency, effectively reducing your production and operating costs.
Casting

Casting

With years of experience in the casting industry, we provide core casting solutions for your product manufacturing with our exquisite craftsmanship and rigorous quality control! Whether you are developing new products through casting, mass production with casting support, or developing customized castings, you can enjoy exclusive casting services throughout the entire process, helping your products seamlessly transition from design to mass production delivery. We boast a team of experienced casting engineers and a modern casting workshop, proficient in various casting processes such as sand casting, die casting, and precision casting. Our capabilities adapt to diverse material requirements, including cast iron, cast aluminum, cast copper, and stainless steel, perfectly matching the needs of multiple industries such as machinery manufacturing, automotive parts, construction machinery, hardware tools, and medical devices. From product drawing analysis and casting process optimization to mold making, casting, subsequent processing, and quality inspection, every step strictly adheres to international casting standards, ensuring high precision, sufficient strength, and stable performance of castings, effectively enhancing the core competitiveness of our products. We offer dedicated one-on-one service throughout the entire process, responding promptly to your needs and accelerating project progress, so you don’t need to worry about technical barriers or production delays. Professional mold making services – choosing us means choosing an efficient, reliable, and worry-free partner to help your products quickly capture the market.
Abrasive tools

Abrasive tools

With years of experience specializing in abrasive molds, we leverage our expertise to ensure the smooth mass production of your products! Whether you’re developing new products, adapting them for mass production, or upgrading existing molds, you can enjoy a full-process customized abrasive mold development service. We have a team of experienced engineers who strictly adhere to industry standards at every stage, from product drawing analysis and mold structure optimization to mold processing and trial molding. We utilize advanced production equipment and high-quality raw materials to ensure high precision, long lifespan, and stable molding, effectively reducing your production losses. We offer dedicated one-on-one service throughout the entire process, responding promptly to your needs and accelerating project progress, so you don’t need to worry about technical barriers or production delays. For professional mold making, choosing us means choosing an efficient, reliable, and worry-free partner to help your products quickly capture the market!
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We have our own R&D and production team that supports small batch customization and sample processing related to hydraulic maintenance.

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