What is Hitachi ZX350LCK-5G Fault Code 13007-2?

Fault Code 13007-2 indicates a hydraulic pump solenoid valve circuit malfunction, specifically detecting an open circuit or abnormal voltage in the main pump control system. This code triggers when the Engine Control Module (ECM) identifies that the electrical signal to the pump flow control solenoid is outside acceptable parameters, typically registering higher resistance than the 3-8 ohm specification or showing complete circuit discontinuity.

This fault is critical for the ZX350LCK-5G because the proportional solenoid valve directly regulates hydraulic pump displacement based on operator demand and engine load. When this circuit fails, the excavator's ECM cannot properly modulate hydraulic flow, resulting in compromised digging force, swing speed reduction, and potential activation of the machine's power derate mode to prevent damage to the hydraulic system.

Common Symptoms

• Amber hydraulic warning light illuminated on the instrument panel with reduced machine performance
• Sluggish hydraulic response across all functions, particularly noticeable during combined operations (swing while digging)
• Intermittent loss of hydraulic power that may restore after key cycling, indicating poor electrical connections
• Engine RPM fluctuation under load as the ECM attempts to compensate for pump control irregularities
• Diagnostic monitor displaying "13007-2" with possible secondary codes related to hydraulic pressure sensors

Potential Causes

The most frequent causes in used ZX350LCK-5G excavators include:

• Corroded or loose connector pins at the C-214 hydraulic pump harness connector (known wear point on 5G series machines)
• Damaged wiring harness along the right-side frame rail where the cable runs near the hydraulic tank mounting bracket—a common rub-through location
• Failed pump solenoid coil showing open circuit resistance (should measure 5-7 ohms at 20°C)
• ECM internal driver circuit failure less common but possible in high-hour machines (8,000+ hours)
• Voltage supply issues from the main power relay or poor chassis ground connections at G-302 ground point

How to Troubleshoot and Fix Code 13007-2

Step 1: Initial Electrical Inspection Using a digital multimeter, check battery voltage (should be 24-28V with engine running). Locate the pump solenoid connector C-214 near the main hydraulic pump on the right side of the engine. Inspect for corrosion, bent pins, or moisture intrusion—common in used excavators operating in wet conditions. Clean connections with electrical contact cleaner and apply dielectric grease.

Step 2: Solenoid Resistance Testing Disconnect the solenoid connector and measure resistance across the solenoid terminals. Specification is 5-7 ohms at 20°C (68°F). If reading shows infinite resistance (open circuit) or below 3 ohms, the solenoid valve assembly requires replacement (Hitachi part #4721908).

Step 3: Wiring Harness Continuity Check With the harness disconnected at both ends, check continuity from the ECM connector pin E-37 to the pump solenoid. Also verify the ground circuit shows less than 0.5 ohms resistance to chassis ground. Inspect the harness routing along the frame rail—on used machines, look for wire insulation wear where the harness contacts metal edges.

Step 4: Voltage Signal Testing Reconnect everything and use a breakout harness or back-probe the solenoid connector with the engine running. The ECM should provide a pulse-width modulated (PWM) signal varying between 0-24V. If no voltage is present with the harness and solenoid confirmed good, ECM replacement may be necessary—consult Hitachi diagnostic software Dr.EX for advanced ECM testing.

For used excavators, always inspect connector seals and harness protective sleeving, as environmental degradation accelerates electrical failures. Replace any cracked conduit or damaged protective boots before reassembly.

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Disclaimer: This guide provides general troubleshooting information. Always consult the Hitachi ZX350LCK-5G service manual and consider professional diagnostic assistance for complex electrical issues. Improper repairs may void warranties or cause additional damage.