COGENG 0004912 Engine Harness Hitachi ZAXIS230LC ZAXIS270
  • COGENG 0004912 Engine Harness Hitachi ZAXIS230LC  ZAXIS270,Excavator Solenoid Valve | Excavator Pressure Switch | Excavator Revolution Sensor | Excavator Wiring Harness | Excavator Throttle Motor --- COGENG High-Qulity Parts Service GAOGENG Provider,COGENG 0004912 Engine Harness Hitachi ZAXIS230LC  ZAXIS270
  • COGENG 0004912 Engine Harness Hitachi ZAXIS230LC  ZAXIS270,Excavator Solenoid Valve | Excavator Pressure Switch | Excavator Revolution Sensor | Excavator Wiring Harness | Excavator Throttle Motor --- COGENG High-Qulity Parts Service GAOGENG Provider,COGENG 0004912 Engine Harness Hitachi ZAXIS230LC  ZAXIS270
  • COGENG 0004912 Engine Harness Hitachi ZAXIS230LC  ZAXIS270,Excavator Solenoid Valve | Excavator Pressure Switch | Excavator Revolution Sensor | Excavator Wiring Harness | Excavator Throttle Motor --- COGENG High-Qulity Parts Service GAOGENG Provider,COGENG 0004912 Engine Harness Hitachi ZAXIS230LC  ZAXIS270
  • COGENG 0004912 Engine Harness Hitachi ZAXIS230LC  ZAXIS270,Excavator Solenoid Valve | Excavator Pressure Switch | Excavator Revolution Sensor | Excavator Wiring Harness | Excavator Throttle Motor --- COGENG High-Qulity Parts Service GAOGENG Provider,COGENG 0004912 Engine Harness Hitachi ZAXIS230LC  ZAXIS270
  • COGENG 0004912 Engine Harness Hitachi ZAXIS230LC  ZAXIS270,Excavator Solenoid Valve | Excavator Pressure Switch | Excavator Revolution Sensor | Excavator Wiring Harness | Excavator Throttle Motor --- COGENG High-Qulity Parts Service GAOGENG Provider,COGENG 0004912 Engine Harness Hitachi ZAXIS230LC  ZAXIS270
  • COGENG 0004912 Engine Harness Hitachi ZAXIS230LC  ZAXIS270,Excavator Solenoid Valve | Excavator Pressure Switch | Excavator Revolution Sensor | Excavator Wiring Harness | Excavator Throttle Motor --- COGENG High-Qulity Parts Service GAOGENG Provider,COGENG 0004912 Engine Harness Hitachi ZAXIS230LC  ZAXIS270

COGENG 0004912 Engine Harness Hitachi ZAXIS230LC ZAXIS270

Product name:    Hitachi  Wiring Harness
Part No: 0004912
Model Number:For   ZAXIS230LC  ZAXIS270
Material:Lron+Rubber
Packing:PP bag inside, carton box outside
Payment Terms:Western Union, L/C, T/T, MoneyGram, D/A, D/P
MOQ:Acceptable trial order
Shipping Mode:By air, by sea, by express(Fedex, UPS, DHL, TNT, etc.)
Place of Origin:Guangdong, China
Brand name:COGENG
CertifiCATEEion:ISO9001
Supply :500PCS
  • COGENG 0004912 Engine Harness Hitachi ZAXIS230LC  ZAXIS270,Excavator Solenoid Valve | Excavator Pressure Switch | Excavator Revolution Sensor | Excavator Wiring Harness | Excavator Throttle Motor --- COGENG High-Qulity Parts Service GAOGENG Provider,COGENG 0004912 Engine Harness Hitachi ZAXIS230LC  ZAXIS270
  • COGENG 0004912 Engine Harness Hitachi ZAXIS230LC  ZAXIS270,Excavator Solenoid Valve | Excavator Pressure Switch | Excavator Revolution Sensor | Excavator Wiring Harness | Excavator Throttle Motor --- COGENG High-Qulity Parts Service GAOGENG Provider,COGENG 0004912 Engine Harness Hitachi ZAXIS230LC  ZAXIS270
  • COGENG 0004912 Engine Harness Hitachi ZAXIS230LC  ZAXIS270,Excavator Solenoid Valve | Excavator Pressure Switch | Excavator Revolution Sensor | Excavator Wiring Harness | Excavator Throttle Motor --- COGENG High-Qulity Parts Service GAOGENG Provider,COGENG 0004912 Engine Harness Hitachi ZAXIS230LC  ZAXIS270

Desciption

Product Parameter Table

Parameter Specification
Product Name Hitachi Excavator Main Chassis / Engine Wiring Harness
Primary Part Numbers 0004912
Brand COGENG (Premium Aftermarket Replacement)
Condition Brand New, 100% Continuity & Dielectric Withstand Tested
Machine Model Compatibility Hitachi ZAXIS230LC  ZAXIS270 
Hydraulic Excavators
Material Copper Conductor Core, XLPE Wire Insulation, Rubber-Sealed Connectors, High-Temperature Nylon Protective Conduit
Harness Type Complete Engine & Main Chassis Interconnect Harness — ECM Interface, Full Sensor & Actuator Network, Injector Control, CAN Bus Machine Communication
Wire Insulation Cross-Linked Polyethylene (XLPE) with High-Temperature PTFE in Critical Heat Zones; SAE J1128 Type SXL/GXL; Rated -40°C to +125°C Continuous
Connector Systems Deutsch DT, Deutsch DTM, Sumitomo Sealed Series, Integrated ECM Connectors with Gold-Plated Contacts
Protective Sheathing High-Temperature Corrugated Nylon Split-Loom Conduit; Self-Fusing Silicone Tape at All Branch Junctions; Adhesive-Lined Dual-Wall Heat Shrink Boots at All Connector Backshells
Voltage Rating 24V DC System, 600V Insulation Rating
Environmental Sealing IP67 / IP69K Rated Mated Connectors with Silicone Interfacial Seals and Peripheral Gaskets
Chemical & Abrasion Resistance Resistant to Diesel Fuel, Engine Oil, Hydraulic Fluid, Engine Coolant, and Commercial Degreasing Solvents; Exceeds SAE J1128 Abrasion Standards
Quality Assurance 100% Automated Pin-to-Pin Continuity Mapping Against OEM Schematic; 1000V AC HiPot Dielectric Withstand Test; Computer-Monitored Crimp Force Recording on Every Terminal; 10x Magnification Visual Inspection
Certification ISO 9001 Certified Manufacturing Facility
Place of Origin Guangdong, China
Supply Capacity 500 Pieces per Month (Larger Quantities Available on Request)
Minimum Order Quantity Acceptable Trial Order — Single Unit Orders Welcome
Shipping Weight 3.5 kg (Gross, approximate)
Package Dimensions 60 x 48 x 16 cm (Coiled and Flat-Packed in Protective Carton)
Packing Inner: PP Bag with Anti-Static Protection; Outer: Heavy-Duty Export-Grade Corrugated Carton Box with Protective Foam
Return Policy Non-Returnable / Non-Exchangeable (Comprehensive DOA Guarantee Included)

PRODUCT OVERVIEW

The COGENG Wiring Harness, part number 0004912, is a precision-manufactured, comprehensive electrical distribution harness engineered as a direct, form-fit-function replacement for the Hitachi ZAXIS 230LC and ZAXIS 270 hydraulic excavator platforms. These 23- to 27-ton class excavators represent the mid-size core of Hitachi's globally respected ZAXIS product line, machines that have earned a formidable reputation for exceptional hydraulic performance, operator comfort, and structural durability in the most demanding construction, quarry, demolition, and heavy infrastructure applications worldwide. The 0004912 harness serves as the central nervous system of the excavator, providing the complete, protected, and environmentally sealed electrical pathways that connect the machine's Engine Control Module (ECM), the hydraulic system's intelligent pump and valve controllers, the operator's cab controls and multifunction LCD monitoring display, and the full suite of engine, hydraulic, and machine system sensors distributed across the superstructure and undercarriage.

The Hitachi ZAXIS-series excavator family introduced a significant advancement in construction equipment technology with its Human & Intelligent (HIOS) hydraulic system. This sophisticated electronic control architecture uses real-time sensor feedback and high-speed digital processing to continuously optimize hydraulic pump displacement, engine throttle position, and individual valve spool characteristics for maximum digging productivity and minimum fuel consumption. The 0004912 wiring harness is the physical infrastructure that makes this intelligent, adaptive control possible. It carries precision, low-noise analog signals from the network of pressure sensors mounted on the main implement pumps, temperature sensors in the engine coolant and hydraulic oil circuits, angle sensors on the pump swash plates that report actual pump displacement, and position sensors on the main control valve spools. It transmits high-frequency digital pulse trains from the engine speed sensor and the pump speed sensors that provide the ECM and the main machine controller with real-time rotational speed data accurate to fractions of a revolution per minute. It delivers the precisely modulated, high-frequency Pulse Width Modulation (PWM) drive signals to the electro-proportional solenoid valves that control pump displacement, swing parking brake release, travel straight-line compensation, and auxiliary hydraulic flow for attachments such as breakers and crushers. And it maintains the high-speed bidirectional CAN bus data link that enables seamless, millisecond-level coordinated communication between the engine ECM, the pump controller, and the operator's multifunction monitor panel, ensuring that engine power output and hydraulic demand are always perfectly matched.

The operating environment for a main chassis wiring harness in a Hitachi ZAXIS 230LC or ZAXIS 270 excavator is exceptionally severe and multifaceted. The harness must route through the tight, geometrically complex confines of the excavator's swing frame, where it endures constant, repetitive flexing and twisting as the upper structure rotates continuously relative to the undercarriage—a motion repeated thousands of times during every working shift. It must pass through the engine bay, where radiant heat from the exhaust manifold and turbocharger turbine housing, which can glow dull red under sustained full load, subjects adjacent wire insulation to surface temperatures that rapidly degrade standard materials. The ambient air temperature in the engine compartment routinely exceeds 70°C during heavy digging operations, and can spike significantly higher during thermal soak after engine shutdown. The harness must survive daily exposure to high-pressure hot water jetting during machine cleaning, diesel fuel and hydraulic oil mist from inevitable minor seepage at connection points, and the aggressive chemical assault of industrial degreasing solvents used to remove accumulated grime. It is subjected to continuous, high-amplitude, multi-axis vibration from the diesel engine and the high-pressure hydraulic pumps, and the sudden shock loads transmitted through the entire machine structure during hard digging, rock ripping, hammer operation, and track travel over rough terrain.

The failure modes of the OEM 0004912 harness are systematic, well-documented, and predictable over the service life of the machine. The primary failure mechanism is heat-induced insulation embrittlement and cracking. The OEM PVC-based wire insulation, after thousands of thermal cycles from cold morning startup to sustained full-load operating temperature and back to ambient, progressively loses its plasticizer compounds. The once-flexible insulation becomes brittle, developing a microscopic network of cracks. Moisture from humidity, rain, or pressure washing enters these cracks, and capillary action draws the water along the copper strands, initiating "green wire" copper oxide corrosion that progressively increases the circuit's electrical resistance. The ECM, detecting an implausible sensor voltage, logs a diagnostic trouble code and often commands an engine derate to protect against potential damage. A second critical failure is fretting corrosion at the ECM and controller connector pins, where continuous micro-vibration causes microscopic relative motion between the pin and socket, wearing through the gold plating and creating an intermittent, high-resistance connection. A third failure is chafing damage at contact points where the harness rubs against frame edges, hydraulic fittings, or the swing frame bore.

COGENG's 0004912 aftermarket harness is engineered to definitively resolve each of these failure mechanisms. We use XLPE-insulated wire rated for 125°C continuous operation, multi-layer thermal shielding in exhaust-proximate zones, self-fusing silicone tape at every branch junction for permanent waterproof sealing, and precision-machined, gold-plated connector contacts to prevent fretting. Every terminal is solid-barrel and crimped using computer-monitored presses. Built on a precision OEM jig, this harness is a true drop-in replacement manufactured in our ISO 9001 certified facility with a consistent supply capacity of 500 pieces per month.

COMPATIBLE EXCAVATORS

The 0004912 harness is specifically designed for the Hitachi ZAXIS mid-size excavator platform. Always provide your complete machine model and serial number for final compatibility verification.

Brand Model Machine Class
Hitachi ZAXIS 230LC 23-Ton Hydraulic Excavator (Long Carriage)
Hitachi ZAXIS 270 27-Ton Hydraulic Excavator

PARTS LIST (Included in Package)

      1. Complete Wiring Harness Assembly (1 unit): Fully assembled, jig-built harness with all connectors, solid-barrel terminals, protective conduit sheathing, thermal shielding layers, factory-positioned rubber-lined metal P-clips, and heat-shrink printed identification labels pre-installed.

      2. Integrated ECM Connector Assembly: The primary ECM connector body with all gold-plated contacts, silicone interfacial seal, and adhesive-lined heat shrink strain relief boot pre-installed.

      3. All Sensor, Actuator, and System Connectors: Every branch is pre-terminated with solid-barrel contacts, silicone wire seals, and plastic cavity plugs in unused positions. Connector types include Deutsch DT, DTM, and Sumitomo sealed series.

      4. High-Current Power and Ground Terminals: Heavy-gauge alternator, starter motor, and battery cables terminated with tin-plated, closed-barrel copper ring terminals, each sealed with dual-wall adhesive-lined heat shrink.

      5. PP Bag Inner Packing and Export-Grade Carton: The harness is sealed in a PP bag with anti-static protection and flat-packed in a rigid, double-wall corrugated carton with custom-cut protective foam and prominent "Do Not Cut — Electrical Harness Inside" labels.

DECOMPOSE PICTURES (VISUAL REFERENCE GUIDE)

Note: The following descriptions provide a detailed technical walkthrough of accompanying high-resolution product photographs.

Image 1: Complete Harness Assembly — Jig Board Layout
A wide-angle overhead view of the entire 0004912 harness laid out on a calibrated precision engineering jig board. The harness displays the characteristic multi-branch tree topology of a mid-size excavator main chassis harness. The main trunk, which routes from the cab through the swing frame to the engine bay and hydraulic compartment, is wrapped in heavy-duty black high-temperature split-loom nylon conduit. Multiple lateral branches extend to the engine ECM, the hydraulic pump electro-proportional solenoids, the swing motor speed and position sensors, the travel motor sensors, the operator cab interface including the monitor display and joystick controllers, and the full complement of engine and hydraulic system sensors. Each branch is tagged with a white heat-shrink printed identification label showing the OEM circuit number.

Image 2: Main ECM Connector — High-Magnification Macro Detail
A close-up image of the primary ECM connector with the locking mechanism open, revealing the precisely aligned, high-density grid of gold-plated machined socket contacts. The silicone interfacial seal provides the primary environmental barrier. The backshell is fully encapsulated in a thick-walled, adhesive-lined heat shrink boot for complete 360-degree sealing and strain relief.

Image 3: Hydraulic Pump Solenoid Branch — Chemical & Abrasion Protection
This image focuses on a branch leg connecting to the electro-proportional pump displacement solenoids. The branch features chemical-resistant PET braided sleeving over a self-fusing silicone tape underlayer, with a deliberate drip loop to prevent hydraulic oil migration into the connector.

Image 4: Swing Frame Flex Zone — Articulation Protection
A detailed view of the harness section designed to route through the center swivel joint. The wires are bundled in a helical coil configuration, wrapped in flexible, self-lubricating nylon conduit. Heavy-duty molded rubber strain relief boots protect the transition points.

Image 5: Heavy-Gauge Power Terminal — Macro Detail
A macro photograph of a main power cable termination showing the precise hexagonal crimp barrel compression pattern and the glossy, dual-wall adhesive-lined heat shrink seal with visible adhesive bead, confirming a permanent moisture-proof environmental seal.

DECOMPOSE PICTURES (VISUAL REFERENCE GUIDE)

Note: The following descriptions provide a detailed technical walkthrough of accompanying high-resolution product photographs.

Image 1: Complete Harness Assembly — Jig Board Layout
A wide-angle overhead view of the entire 0004911/0004912 harness laid out on a calibrated precision engineering jig board. The harness displays the characteristic multi-branch topology of a 20- to 27-ton excavator main chassis harness. The main trunk is wrapped in heavy-duty black high-temperature split-loom nylon conduit. Branches extend to the engine ECM, hydraulic pump solenoids, swing motor sensors, travel motor sensors, operator cab interface, monitor display, and the full suite of engine and hydraulic sensors. Each branch is tagged with a white heat-shrink printed identification label.

Image 2: Main ECM Connector — High-Magnification Macro Detail
A close-up image of the primary ECM connector with the locking mechanism open, revealing the precisely aligned grid of gold-plated machined socket contacts. The silicone interfacial seal surrounds the pin field. The backshell is fully encapsulated in a thick-walled, adhesive-lined heat shrink boot providing complete 360-degree environmental sealing.

Image 3: Hydraulic Pump Solenoid Branch — Chemical & Abrasion Protection
This image focuses on a branch leg that connects to the electro-proportional pump displacement solenoids. The branch features chemical-resistant PET braided sleeving over self-fusing silicone tape, with a deliberate drip loop to prevent hydraulic oil migration into the connector body.

Image 4: Swing Frame Flex Zone — Articulation Protection
A detailed view of the harness section designed to route through the center swivel joint. The wires are bundled in a helical coil configuration, wrapped in flexible, abrasion-resistant nylon conduit. Heavy-duty molded rubber strain relief boots protect the transition points.

Image 5: Heavy-Gauge Power Terminal — Macro Detail
A macro photograph of a main power cable termination showing the precise hexagonal crimp barrel compression pattern and the glossy, dual-wall adhesive-lined heat shrink seal with a visible adhesive bead, confirming a permanent moisture-proof environmental seal.

COMPATIBILITY NOTES: CRITICAL VERIFICATION GUIDE

  1. 0004911 and 0004912 — Interchangeable Part Numbers: These two part numbers are functionally related and may be electrically interchangeable, representing the same core harness with minor production revisions or different machine variant configurations. Verification of your specific machine model and serial number is required to confirm the correct part number for your application.

  2. ZX-Series Model Specificity: This harness is designed for the ZX200, ZX240, ZX250, and ZX270 excavator platforms. It is not compatible with the earlier EX-series (EX200, EX270) or the later ZX-3, ZX-5, or ZX-6 series models, which utilize different electrical architectures and connector generations.

  3. Material Construction: The harness is constructed with a copper conductor core, XLPE wire insulation, rubber-sealed connectors, and high-temperature nylon protective conduit. There are no iron components in the electrical harness itself. Any reference to "Iron + Rubber" in material specifications refers to the rubber-lined metal P-clips and mounting brackets that are integrated into the harness assembly for chassis mounting.

  4. Serial Number Verification: Within each ZX model line, Hitachi implemented running production changes that can affect connector pin-outs and branch configurations. Providing your machine's complete serial number is essential for our technical team to verify the exact harness variant your machine requires.

  5. Professional Installation Required: Installing a main chassis wiring harness on an excavator is a labor-intensive procedure requiring methodical routing through the cab, swing frame, engine bay, and hydraulic compartment. Installation should be performed by a qualified heavy equipment technician with access to the machine's service manual and Hitachi diagnostic software for post-installation system verification.

 Decompose pictures


Parts list
NO Number Name Qty
1 0004911 Wiring Harness 1
1 0004912 Wiring Harness 1
1 4487830 Wiring Harness 1
1A 4270554 FUSE 2
1B 4287670 FUSE 1
1C 4315323 FUSE 1
1D 4315324 LINK 1
2 14M7274 NUT 4
3 12M7066 LO CK WASHER 4
4 24M7028 WASHER 4
5 H77698 Tie Band 13
16 4257159 BRACKET 1
23 AT303736 Wiring Harness 1
26 4418301 BRACKET 1
29 12M7006 LOCK WASHER 3
29 19M8425 Cap Screw 3
31 19M7932 Cap Screw 2
31 12563400 WASHER 2
39 4449250 CLIP 7
40 19M7662 Cap Screw 1
40 12M7066 LO CK WASHER 1
41 19M7938 Cap Screw 25
41 12M7066 LO CK WASHER 25
42 T32854 CLAMP 4
43 4190261 CLIP 5
44 T28949 CLAMP 7
45 4190275 CLAMP 1
46 R72659 CLAMP 1
49 AT121321 HOSE CLAMP 5
52 T78787 CLAMP 3

Detailed Product Description

1. Key Features

  • Exact OEM Fit: Direct replacement for Hitachi part numbers 0004911 and 0004912, ensuring seamless integration.

  • High-Quality Materials:

    • Conductors: Oxygen-free copper for superior conductivity.

    • Insulation: Heat-resistant PVC or cross-linked polyethylene (XLPE) for abrasion and chemical resistance.

    • Connectors: OEM-style terminals with corrosion-resistant plating.

  • Durability: Reinforced shielding against vibrations, moisture, and extreme temperatures (-40°C to +105°C).

  • Plug-and-Play Design: Pre-assembled with labeled connectors for hassle-free installation.

2. Compatibility

  • Models: Compatible with Hitachi ZAXIS200  ZAXIS240, ZAXIS230LC  ZAXIS270 excavators (verify exact machine serial numbers with COGENG).

  • Replaces: OEM Part Numbers 0004911 (ZAXIS200  ZAXIS240) and 0004912 (ZAXIS230LC  ZAXIS270).

3. Applications

  • Integrates with the excavator’s electrical systems, including:

    • Engine control unit (ECU) and sensors.

    • Hydraulic control valves and solenoids.

    • Dashboard instrumentation and warning lights.

    • Lighting, ignition, and auxiliary circuits.

4. Why Choose COGENG’s Wiring Harness?

  • Reliability: Rigorously tested for continuity, insulation resistance, and mechanical stress.

  • Cost-Effective: Competitive pricing compared to genuine Hitachi parts.

  • Warranty: Backed by COGENG’s quality assurance policy.

5. Technical Specifications

  • Wire Gauge: Ranges from 18 AWG (sensors) to 10 AWG (power lines).

  • Voltage Rating: 12V/24V DC systems.

  • Protection: IP67-rated connectors where applicable.

  • Standards: Complies with ISO 6722, SAE J1128.

6. Installation Guide

  1. Disconnect the battery to prevent short circuits.

  2. Remove the old harness, noting routing paths and clip positions.

  3. Install the new harness using OEM routing guides; avoid sharp edges or heat sources.

  4. Secure all connectors firmly and test systems before operation.

Conclusion

COGENG’s 0004911 / 0004912 Wiring Harness provides a dependable, OEM-quality solution for Hitachi excavators, minimizing downtime and ensuring long-term electrical performance.

Installation decomposition diagram
  • Complete machine power shutdown required before installation

  • Install both harnesses as matched set for optimal system performance

  • Follow early ZX series specific routing diagrams

  • Ensure proper connector engagement with classic components

  • Verify compatibility with existing electrical components

  • Perform comprehensive system diagnostics after installation

INSTALLATION DECOMPOSITION DIAGRAM

Note: This is a step-by-step textual guide corresponding to a numbered visual installation diagram.

Step 1: Safety Lockout and Documentation
Red lockout symbol over battery: "Disconnect negative (-) and positive (+) battery cables. Lock out master disconnect switch. Wait 60 seconds for complete system discharge." Camera icon: "Photograph every aspect of existing harness routing. Document all P-clips, routing through the swing frame, around the exhaust and turbo, hydraulic pump connections, and all connector orientations."

Step 2: Old Harness Systematic Removal

  • Label every connector with numbered wire tags as it is disconnected.

  • Cab Interior: Disconnect monitor display, key switch, throttle dial, joystick pilot controllers, and cab harness interface connectors.

  • Engine Bay: Disconnect ECM connector(s), all engine sensor connectors, injector pass-through, turbo actuator, EGR valve.

  • Hydraulic Compartment: Disconnect pump displacement solenoids, pressure sensor connectors, swing and travel motor sensor connectors.

  • Power Disconnection: Remove ring terminals from alternator, starter motor, battery junction stud, and chassis ground points.

  • Cut all zip ties, release all P-clips, carefully extract the old harness.

Step 3: New Harness Visual Comparison
Uncoil new COGENG harness beside old harness. Compare ECM connector shape and pin count, branch lengths and connector types, ring terminal diameters. Verify every match before proceeding.

Step 4: New Harness Routing and Connection

  • Route harness following photographic reference. Secure loosely at all P-clip and standoff locations.

  • Connect ECM connector(s) first.

  • Systematically reconnect all cab interface, sensor, actuator, and hydraulic system connectors.

  • Install and torque all power and ground ring terminals to OEM specifications.

  • Tighten all P-clips. Install new high-temperature zip ties. Verify clearance from exhaust, turbo, swing frame, and all moving parts.

Step 5: Power-Up and Full Functional Test
Reconnect batteries. Connect Hitachi diagnostic software. Verify no active diagnostic trouble codes. Start engine. Verify immediate oil pressure. Monitor all parameters. Warm to operating temperature. Cycle all hydraulic functions, swing, and travel. Confirm zero fault codes after complete test.

🚚 SHIPPING DETAILS & RETURN POLICY

Shipping Details

Detail Description
Shipping Methods By Air: Fast, cost-effective for medium-weight orders. By Sea: Most economical for bulk orders and container loads. By Express (FedEx, UPS, DHL, TNT): Fastest door-to-door service for machine-down emergencies. The specific arrangement is optimized based on cargo situation and destination.
Estimated Delivery Time Express: 4-8 business days. Air Freight: 8-15 days. Sea Freight: 30-45 days. Transit times are carrier-dependent. The arrival date on the official tracking portal is definitive. Tracking provided within one business day of dispatch.
Packing Inner: PP bag with anti-static protection. Outer: Heavy-duty export-grade corrugated carton box with custom-cut protective foam. The double-layer protection ensures the harness arrives in factory-fresh condition.
Payment Terms Western Union, L/C (Letter of Credit), T/T (Telegraphic Transfer), MoneyGram, D/A (Documents against Acceptance), D/P (Documents against Payment). Flexible terms to suit your business requirements.
Minimum Order Quantity Acceptable trial order — single unit orders are welcome. We support first-time customers with small quantity orders to verify quality and compatibility.

Return Policy

Policy Point Terms
Merchant Return Policy All sales are final. No returns or exchanges. Once a harness has left our controlled quality environment, we cannot verify it remains in factory-fresh, uninstalled condition. This policy guarantees every customer receives a brand-new product.
DOA Quality Guarantee Full replacement for manufacturing defects reported within 7 days of delivery. Harness must be in original, uninstalled condition. Physical damage from cutting, stretching, crushing, or incorrect installation voids the guarantee.
Pre-Shipment Confirmation We send high-resolution photos of your exact harness for written approval before dispatch. No shipment is released without your confirmation.

FREQUENTLY ASKED QUESTIONS

Q1: What is the difference between part numbers 0004911 and 0004912?
A: These two part numbers are closely related and often interchangeable, representing the same core harness with minor production revisions or specific machine variant configurations. Both numbers are validated for the ZX200-ZX270 platform. Our technical team will verify the correct part number for your specific machine serial number during pre-shipment confirmation.

Q2: What are the symptoms of a failing main chassis harness on my Hitachi ZX excavator?
A: Common symptoms include multiple unrelated diagnostic trouble codes appearing simultaneously, intermittent ECM or pump controller communication loss, specific hydraulic functions becoming slow, jerky, or inoperative, the monitor display flickering or losing data, random engine derate or shutdown, and visible chafing, melted insulation, or green corrosion at connector backshells. A "wiggle test" while monitoring live data that causes sensor values to drop out confirms a harness issue.

Q3: Is this the complete machine harness or just the engine harness?
A: The 0004911/0004912 is typically the main chassis wiring harness, which includes the engine bay circuits, hydraulic system circuits, and the cab interface. It provides the complete electrical connection between the engine ECM, pump controller, operator controls, and the machine's sensor and actuator network. Please verify with our sales team if you require a specific sub-harness.

Q4: Do you accept trial orders for a single unit?
A: Yes. We welcome trial orders for single units. We understand that first-time customers need to verify quality, fit, and performance. Contact our sales team to place your trial order, and we will ensure it receives the same careful attention as a bulk order.

Q5: What certifications does COGENG hold?
A: COGENG is an ISO 9001 certified manufacturer. Our quality management system ensures consistent manufacturing processes, rigorous inspection protocols, and full batch traceability for every harness we produce.

📞 CONTACT & ORDERING

For pricing, machine-down emergency support, trial orders, bulk quantity discounts, or pre-purchase compatibility verification, contact your COGENG supplier today.

Sales Price: Contact COGENG sales customer service for the most current competitive pricing. Trial orders welcome.
Shipping Method & Cost: We will quote the optimal shipping solution—by air, by sea, or by express courier—based on your location and urgency.
Estimated Delivery Time: Based on the selected carrier. Tracking provided within one business day of dispatch.

✅ Direct OEM Replacement — Jig-Built for Guaranteed Fit, No Cutting or Splicing Required.
✅ Hitachi ZX-Series Harness — Validated for ZX200, ZX240, ZX250, and ZX270 Platforms.
✅ ISO 9001 Certified Manufacturing — Consistent Quality, Full Batch Traceability.
✅ Trial Orders Welcome — Single Unit Orders Accepted for First-Time Customers.
✅ In Stock & Ready to Ship — 500 Pieces Monthly Supply Capacity for Immediate and Bulk Orders.

Critical Action: To ensure 100% compatibility, please provide your Hitachi excavator's complete model and serial number, and a clear photo of your existing harness label and ECM connector face. Our technical team will cross-reference your machine's exact configuration and provide written confirmation before you order.
Merchant Return Policy: All products shipped are not returnable or exchangeable. Please complete all compatibility checks before purchase.

* Details Return Sales*
MerchantReturnPolicy:
The products shipped are not returnable or exchangeable.This is a single-use product and must not be resold.
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