Hitachi ZX330-3 / ZX350-5A / ZX400 Main Control Valve – (YA00000734 / 4625137 / YA00000734H3)

Description

Detail Information

Note: The application information provided is for reference only. Please confirm the part number and compare it with the old component before purchasing. If you have any questions, please feel free to contact us.
It is worth choosing a product that features stable performance, high reliability, easy installation, and quick response.

1. Key Features & Benefits

• Genuine Hitachi OEM main control valve – Available in three interchangeable part numbers: YA00000734 (primary reference), 4625137, and YA00000734H3. Manufactured to Hitachi’s original equipment specifications for the ZX330‑3, ZX330‑5A, ZX350‑5A, ZX400, and compatible 30–40 ton class excavators. This is a brand‑new, factory‑spec unit – not remanufactured, not a generic substitute.

• The hydraulic “brain” of your excavator – The main control valve (also known as the main distribution valve or control valve group) is the central component that directs hydraulic flow from the main pump to the boom, arm, bucket, swing, and travel circuits. It governs every movement your machine makes – from a delicate grading pass to a heavy bucket curl. It integrates main relief valves, overload relief valves, regenerative valves, and flow rate control valves into a single precision‑machined assembly.

• Engineered for Hitachi’s high‑performance hydraulic systems – The ZX330‑3 features two variable displacement axial piston pumps delivering 2 × 288 L/min total flow, with a working circuit relief pressure of 34.3 MPa and swing circuit relief pressure of 32.4 MPa. The ZX350‑5A and ZX400 share similar high‑flow architectures. The main control valve is precision‑matched to these power plants, ensuring optimal flow distribution, smooth controllability, and responsive machine performance.

• Precision‑machined spools for smooth, accurate control – Every control spool is precision‑ground to exacting tolerances, ensuring smooth spool shifting and accurate flow metering. This delivers the precise, predictable machine response that Hitachi excavators are known for – critical for precision grading, trenching near utilities, and fine attachment control.

• Integrated circuit protection – Features built‑in main relief valves to protect the hydraulic system from overpressure, overload relief valves with make‑up function to prevent cavitation during sudden load changes, and regenerative valves to improve efficiency during boom and arm operations. All relief valve settings are factory‑preset to Hitachi specifications, with the working circuit main relief set at 34.3 MPa.

• New‑generation hydraulic control valve design – This main control valve represents Hitachi’s latest hydraulic technology, designed for a wide range of heavy‑duty applications. The combination of advanced design, precision manufacturing technologies, and high‑quality components ensures reliable, efficient, and long‑lasting performance.

• Superior durability and contamination resistance – All internal components are designed to withstand high hydraulic pressure and long‑term wear, ensuring stable and reliable performance in harsh working environments such as mining, construction, and earthmoving operations. The valve offers high resistance to wear, pressure, and contamination.

• Direct bolt‑on replacement – Mounting flange, port configurations, and bolt patterns match the original Hitachi specifications exactly. No modifications, no adapters – your mechanic unbolts the old valve and bolts this one in.

• Pre‑shipment visual verification – Before packing, we send you detailed high‑resolution photographs of the actual unit (mounting surfaces, port threads, castings, overall condition). You approve shipment – we never ship blind.

• Fast delivery – 5–8 working days lead time from our Guangzhou warehouse. Monthly supply capacity of 300 units, available for single‑piece or bulk orders.

2. Applications

The genuine Hitachi main control valve is the hydraulic command centre for ZX330‑3, ZX350‑5A, ZX400 and 30–40 ton class excavators used across the most demanding job sites:

• Large‑scale open‑pit mining – 30–40 ton excavators are the backbone of copper, gold, iron ore, and coal mining operations. The main control valve’s precise flow distribution and high‑pressure capability (34.3 MPa working circuit relief) deliver consistent digging force and smooth, responsive control hour after hour in remote mine sites where reliability is critical.

• Quarrying & aggregates – Loading trucks, stockpile management, and material handling in granite, limestone, and basalt quarries. The valve’s high resistance to wear, pressure, and contamination withstands abrasive dust conditions, while the precision‑machined spools provide smooth, responsive operation for precise bucket control. The ZX330‑3 delivers a swing speed of 10.7 rpm and bucket digging force of 234 kN, enabled by the valve’s precise flow management.

• Heavy construction & infrastructure – Highway excavation, dam building, bridge footings, and large‑scale earthmoving projects. The valve’s optimized hydraulic flow distribution enables simultaneous, coordinated movement of multiple functions – booming, swinging, and travelling – without power loss. With a total pump flow of 2 × 288 L/min, the valve ensures fast cycle times and high productivity.

• Demolition & scrap processing – Shock loads, vibration, and sharp debris are routine in demolition yards and metal recycling facilities. The valve’s heavy‑duty construction and high‑strength alloy materials absorb these extreme conditions without premature wear.

• Equipment rental fleet – 30–40 ton excavators are high‑value rental assets. A genuine new main control valve provides predictable service life and eliminates the gamble of remanufactured or used units – avoiding costly mid‑rental failures, towing bills, and customer complaints.

• Forestry & land clearing – Steep slopes, fallen timber, and uneven terrain demand reliable hydraulic control. The valve’s consistent pressure and flow output maintain stable power for saws, grapples, and mulchers.

3. Why Choose Hongtengda Parts

Since 2001, Hongtengda Parts has been a leading distributor of earthmoving machinery parts, serving customers across Southeast Asia, the Middle East, Africa, the Americas, and Oceania. Headquartered in Guangzhou’s Zhucun parts hub – one of Asia’s major distribution centres for construction machinery parts – we combine deep inventory, cross‑brand knowledge, and reliable global shipping to keep your machines running.

What you get when you order from us:

• 25 years of heavy equipment parts experience – Since 2001, we have been the go‑to supplier for repair shops, fleet owners, and wholesalers worldwide. We know the Hitachi ZX330‑3, ZX350‑5A, and ZX400 platforms inside out – the different hydraulic systems, control configurations, and production changes over the years.

• 100% genuine Hitachi OEM parts – We supply only genuine Hitachi main control valves (YA00000734 / 4625137 / YA00000734H3), not “compatible” substitutes or generic replacements. You receive a valve that matches the original in every measurable dimension – spool tolerances, port configurations, relief valve settings, and casting quality. OEM. All genuine. No substitutes.

• 90% of our catalog in stock – Your main control valve sits in our Guangzhou warehouse, not in a supplier’s backlog. From hydraulic components to undercarriage kits, most orders are dispatched within 24 hours on fumigated, export‑ready pallets.

• One supplier, all parts – Got a serial number, a model code, or just a photo of a worn‑out part? Our specialists cross‑reference across Hitachi, Caterpillar, Komatsu, Sany, and 15+ brands to find what you need. OEM, OEM‑quality, or hard‑to‑find older model parts – we handle the search so you don’t have to.

• Own maintenance factory and technical team – Equipped with our own maintenance factory and a team of experienced technicians, we provide global customers with one‑stop solutions covering parts supply, technical support, and equipment maintenance.

• Pre‑shipment verification – We never ship a main control valve blind. You receive clear photos of the actual unit before packing – you approve, we ship. When downtime costs money, we move at your speed.

• After‑sales support that works – If you encounter issues after installation, our technical team can review photos and videos to help diagnose. Three senior technicians review your case together. If it’s a quality issue – we cover it. If not – we still guide you through the fix. We don’t just sell parts; we keep you running.