Hitachi ZAX670-5G SCM Engine Control Unit – (9274927 / 9274928 / YA60027151)

Description

Detail Information

1. Key Features & Benefits

• Genuine Hitachi OEM SCM computer board – Part numbers 9274927, 9274928, and YA60027151. Manufactured to Hitachi’s original equipment specifications for the ZAX670-5G, ZX670LC-5G, and compatible 70‑ton class excavators. This is the electronic brain of your machine – not a generic aftermarket substitute. The SCM (System Control Module / Machine Controller) is the central processing unit that manages and coordinates all electronic functions of your excavator.

• The “excavator control brain” for the entire machine – The SCM computer board is the core electronic control component for Hitachi ZAX670-5G series excavators, widely used in large‑scale mining, quarrying, and heavy earthmoving. It receives input signals from sensors, joysticks, and switches, processes this data, and sends output commands to actuators, solenoids, and valves throughout the machine. It controls the engine, hydraulic system, monitor display, and all electronic functions – making it the most critical electronic component on your ZAX670-5G.

• Engineered for the Isuzu 6HK1 and 6WG1 engines – The ZAX670-5G is powered by either the Isuzu 6HK1 or 6WG1 engine, delivering approximately 312 kW (418 HP) . The SCM computer board is specifically calibrated for these engine platforms, ensuring optimal performance, fuel efficiency, and emissions compliance. The 6WG1 engine is a Japanese Isuzu original import engine, widely used in Hitachi ZX670-3, ZX670-5G, ZX870-3, and ZX870-5G excavators.

• Intelligent HIOS IIIB hydraulic system control – The ZAX670-5G features Hitachi’s advanced HIOS IIIB hydraulic system, which can reduce fuel consumption by up to 6% compared to conventional models. The SCM computer board continuously monitors hydraulic demand and adjusts pump output in real time to match working conditions. This delivers the precise, responsive machine control that Hitachi excavators are known for – critical for precision grading, trenching, and fine attachment work.

• Real-time monitoring and fault diagnosis – The SCM computer board continuously monitors all machine systems and records fault codes when issues are detected. When a fault occurs, the controller illuminates the warning indicator on the monitor, enabling rapid diagnosis and reducing downtime. The controller communicates reliably with all machine sensors and actuators.

• Plug-and-play replacement – The SCM computer board is a direct replacement for the original Hitachi unit. It connects to the existing wiring harness with standard connectors – no modifications, no adapters. Simple unbolt-and-replace installation.

• Pre-shipment visual verification – Before packing, we send you detailed high‑resolution photographs of the actual unit (connectors, part number markings, overall condition). You approve shipment – we never ship blind. Video inspection is also available upon request.

• Fast delivery – 5–7 working days lead time from our Guangzhou warehouse. Flexible shipping options including DHL, TNT, UPS, FedEx, and sea freight.

2. Applications

The Hitachi ZAX670-5G SCM computer board is the electronic brain of this 70‑ton class excavator, used across the most demanding job sites:

• Large-scale open-pit mining – 70‑ton excavators are the backbone of copper, gold, iron ore, and coal mining operations. The SCM computer board ensures the engine and hydraulic system deliver consistent power and precise control hour after hour in remote mine sites where reliability is critical. The combination of a 312 kW (418 HP) engine and the HIOS IIIB hydraulic system meets requirements in terms of both output and fuel consumption. The real‑time monitoring and fault diagnosis are essential in remote locations where quick diagnosis can save days of downtime.

• Quarrying & aggregates – Loading trucks, stockpile management, and material handling in granite, limestone, and basalt quarries. The controller’s precise engine management and hydraulic control provide smooth, responsive operation for precise bucket control in abrasive dust conditions.

• Heavy construction & infrastructure – Highway excavation, dam building, bridge footings, and large‑scale earthmoving projects. The SCM computer board ensures the machine delivers the right power and hydraulic flow for every operation – from delicate grading to heavy bucket loads. The advanced electronic control system provides the precise, responsive machine control that operators rely on for efficient cycle times and consistent productivity.

• Demolition & scrap processing – Shock loads, vibration, and rapid load changes are routine in demolition yards and metal recycling facilities. The SCM computer board continuously adjusts engine and hydraulic output to maintain stable power and prevent engine stall under extreme conditions.

• Equipment rental fleet – 70‑ton excavators are high‑value rental assets. A genuine new SCM computer board provides predictable performance and eliminates the risk of electronic failure – avoiding costly mid‑rental breakdowns, towing bills, and customer complaints.

• Forestry & land clearing – Steep slopes, fallen timber, and uneven terrain place variable loads on the machine. The SCM computer board continuously adjusts engine and hydraulic output to maintain consistent power for saws, grapples, and mulchers.

3. FAQ – Frequently Asked Questions

Q1: Is this SCM computer board an exact replacement for my Hitachi ZAX670-5G?

A: Yes. The 9274927 / 9274928 / YA60027151 is the genuine Hitachi SCM computer board for ZAX670-5G, ZX670LC-5G, and compatible 70‑ton class excavators. It is also compatible with ZAX670-3, ZX670-3, ZX870-3, and ZX870-5G models. To confirm compatibility for your specific machine variant, send us your machine serial number and a photo of the old SCM board – we will verify within 2 hours.

Q2: What engine does the ZAX670-5G use?

A: The Hitachi ZAX670-5G is powered by either the Isuzu 6HK1 or 6WG1 engine, delivering approximately 312 kW (418 HP) . The 6WG1 engine is a Japanese Isuzu original import engine. The SCM computer board is specifically calibrated for these engine platforms, ensuring optimal performance, fuel efficiency, and emissions compliance.

Q3: Is this a new SCM board or a remanufactured unit?

A: It is brand new / genuine original, not remanufactured. All internal components are new. The SCM computer board is manufactured to Hitachi‘s original specifications and meets all OEM performance standards.

Q4: Does this SCM board require programming after installation?

A: The SCM computer board may require programming to match your specific machine configuration. We recommend sending us a photo of your machine’s vehicle nameplate and the old SCM board part number so we can assist with the correct programming if needed. If programming is not required, please notify us and we will supply the board as-is.

Q5: What is the warranty on this SCM board?

A: The warranty period is 3 to 6 months depending on product details. We do not provide warranty service for genuine original parts. Our value is delivered up front: genuine Hitachi components, new‑condition SCM board, and pre‑shipment visual verification. For customers who require a warranty‑covered option, we can quote aftermarket alternatives – ask our sales team.

Q6: How long does delivery take?

A: Delivery is 5–7 working days after order confirmation. Flexible shipping options including DHL, TNT, UPS, FedEx, and sea freight are available.

Q7: What payment methods do you accept?

A: We accept T/T (wire transfer), Western Union, and PayPal.

Q8: How can I verify the SCM board is genuine before shipping?

A: Before packing, we send you clear, high‑resolution photographs of the actual unit – connectors, part number markings, and overall condition. You approve shipment only after reviewing these images. We never ship blind. Video inspection is also available upon request.