YN35V00004F1 KDRDE5K-20/30C12A-111 Hydraulic Booster Solenoid Valve for Kobelco SK120-2 SK200-8 SK250-6E

YN35V00004F1 Hydraulic Booster Solenoid Valve for Kobelco Excavator

The YN35V00004F1 hydraulic booster solenoid valve is supplied for Kobelco excavator hydraulic pilot control system repair. It is commonly searched together with KDRDE5K-20/30C12A-111 and is used as a replacement solenoid valve reference for Kobelco SK120-2, SK200-8, SK250-6E and related excavator applications.

This page focuses on YN35V00004F1 as the main part number. YN35V00004F2, KDRDE5K-20 and KDRDE5K-20/30C12A-111 can be used as checking references, but final fitment should be confirmed by the old valve number, connector plug, coil shape, valve body marking, hydraulic valve position and machine information before ordering.

Part Number and Valve Type Notes

YN35V00004F1 is the main Kobelco part number direction for this product page. KDRDE5K-20/30C12A-111 is commonly used as the hydraulic solenoid valve model reference, while KDRDE5K-20 may appear as a shortened model description in buyer searches and supplier listings.

This valve is better described as a hydraulic booster solenoid valve or proportional pressure reducing valve for the hydraulic pilot control circuit. It should not be mixed with stop solenoid valves, safety lock solenoid valves or cylinder extension solenoid valves unless they are shown only as related products.

Because similar Kobelco solenoid valves may use different coil designs, plugs, valve body shapes or hydraulic functions, the old valve photos and part number are more reliable than machine model alone.

Application Reference for Kobelco SK Series Excavators

The strongest application references for this page are Kobelco SK120-2, SK200-8 and SK250-6E. Public aftermarket listings may also connect YN35V00004F1 or YN35V00004F2 with SK100L, SK120-3, SK120-5, SK200, SK200-2, SK200-3, SK200-5, SK200-6E, SK210-3, SK210-8, SK230-6E, SK230-8, SK250-8 and SK350-8 model references.

These model names should be treated as application references, not as the only fitment proof. For older excavators, the hydraulic system may have previous repair history or different valve versions. Confirm the old valve, connector and machine serial number before quotation.

How to Confirm the Correct YN35V00004F1 Solenoid Valve

Before ordering, compare the removed valve carefully. Small differences in plug type, valve body length, coil shape or sealing position can make a solenoid valve unsuitable.

• Confirm whether the old valve number is YN35V00004F1 or a listed checking reference.

• Compare KDRDE5K-20/30C12A-111 marking if it appears on the valve body or label.

• Check the connector plug, pin layout, coil shape and cable direction.

• Compare valve body length, thread area, O-ring grooves and port end design.

• Confirm the installation position on the hydraulic control valve or pilot circuit.

• Send machine model, serial number and old valve photos before quotation if you are not sure.

Common Failure Symptoms

A hydraulic booster solenoid valve may need replacement when the excavator shows slow hydraulic response, weak pilot control, unstable hydraulic operation, intermittent machine movement, fault code related to the valve circuit, coil failure or oil leakage around the valve body.

These symptoms are not always caused by the solenoid valve itself. Wiring harness damage, poor connector contact, low voltage, controller signal problems, hydraulic oil contamination, blocked pilot passages or valve body sticking can create similar issues.

Before replacing the valve, inspect the electrical circuit and hydraulic oil condition. Installing a new valve into a contaminated or electrically unstable system can cause repeated failure.

Troubleshooting Before Replacement

Before ordering a YN35V00004F1 replacement valve, check the related electrical and hydraulic control system. This helps repair shops and equipment owners avoid replacing the wrong component.

• Inspect the connector for corrosion, looseness, oil contamination or broken pins.

• Check wiring harness continuity and ground condition.

• Measure voltage at the connector when the machine commands valve operation.

• Inspect hydraulic oil cleanliness, filters and pilot circuit contamination.

• Check whether the valve body or spool has sticking, wear or internal contamination.

• Confirm whether the fault follows the valve after testing or comparison.

Installation and Maintenance Notes

Stop the machine and release hydraulic pressure before replacement. Clean the surrounding valve body area before removing the old valve to prevent dust or metal particles from entering the hydraulic circuit.

Before installation, compare the replacement valve with the removed unit. Check connector type, coil direction, valve body length, sealing grooves and port end design. Replace damaged O-rings or sealing parts if required.

After installation, check hydraulic response, leakage, fault code status and machine operation at low load first. Maintain clean hydraulic oil to reduce repeated valve sticking or coil overheating problems.

Buying Notes for Repair Shops and Parts Distributors

For repair shops, this YN35V00004F1 hydraulic booster solenoid valve is suitable for Kobelco excavator hydraulic pilot control troubleshooting when the old valve is damaged, leaking, stuck or unable to respond correctly. For distributors, it can be supplied as a small hydraulic electrical replacement part for Kobelco excavator service demand.

Topvelsun supports small repair orders and bulk inquiries. To improve quotation accuracy, please send the required quantity, old valve number, machine model, serial number and photos of the connector, valve body and installation position.

FAQ

What is the main product on this page?

This page is for the YN35V00004F1 hydraulic booster solenoid valve, also searched with the KDRDE5K-20/30C12A-111 valve model reference, for Kobelco excavator hydraulic pilot control applications.

What is the relationship between YN35V00004F1 and KDRDE5K-20/30C12A-111?

YN35V00004F1 is the main Kobelco part number direction, while KDRDE5K-20/30C12A-111 is commonly used as the valve model or hydraulic solenoid valve reference. Both should be checked against the old valve before ordering.

Can YN35V00004F2 be used as a cross reference?

YN35V00004F2 appears in public aftermarket listings together with YN35V00004F1 for Kobelco excavator solenoid valve searches. It should be treated as a checking reference, and final fitment should be confirmed by old valve shape, connector and machine information.

Which Kobelco models are the main references?

The main references on this page are Kobelco SK120-2, SK200-8 and SK250-6E. Other Kobelco SK series models may appear in aftermarket references, but the old valve and machine serial number should be checked before shipment.

What should I check before ordering?

Please check the old valve number, KDRDE5K marking, connector plug, pin layout, coil shape, valve body length, O-ring grooves, port end design and machine serial number. Clear photos of the removed valve are recommended.

What can cause repeated solenoid valve failure?

Repeated failure may be caused by dirty hydraulic oil, blocked filters, poor connector contact, damaged wiring, low voltage, controller signal problems, internal valve sticking or installation of a valve with a different configuration.