YB35V00006F1 YN35V00051F1 Rotate Brake Solenoid Valve for kobelco SK170-8 SK200-8 SK350-8

YB35V00006F1 YN35V00051F1 Rotate Brake Solenoid Valve for Kobelco Excavator

The YB35V00006F1 / YN35V00051F1 rotate brake solenoid valve is supplied for Kobelco excavator swing brake hydraulic control system repair. It is commonly searched with the valve model KWE5K-31/G24YB50 and is used as a replacement solenoid valve reference for Kobelco SK170-8, SK200-8, SK350-8 and related excavator applications.

This page focuses on YN35V00051F1 and YB35V00006F1 as the main part numbers. KWE5K-31/G24YB50 and KWE5K-31-G24YB50 can be used as checking references, but final fitment should be confirmed by the old valve number, connector plug, coil shape, valve body marking, swing brake valve position and machine information before ordering.

Part Number and Valve Type Notes

YN35V00051F1 and YB35V00006F1 are the main Kobelco part number directions for this product page. In many aftermarket searches, buyers may also identify this valve by the KWE5K-31/G24YB50 valve model reference.

This product should be described as a rotate brake solenoid valve or swing brake solenoid valve. It should not be mixed with proportional pump solenoid valves, safety lock solenoid valves, hydraulic booster solenoid valves or cylinder extension solenoid valves, because those valves may have different hydraulic functions, connector styles and installation positions.

Similar Kobelco solenoid valves may look close from the outside, but small differences in valve body length, coil direction, plug layout, O-ring grooves or hydraulic function can make the part unsuitable. The removed valve and actual installation position should be checked before shipment.

Application Reference for Kobelco SK Series Excavators

The strongest model references for this page are Kobelco SK170-8, SK200-8 and SK350-8. Public aftermarket references may also mention SK170-9, SK210-8, SK210-9, SK250-8, SK260LC-8, SK260-9, SK485-8, SK485-9 and other Kobelco SK series models depending on machine version and hydraulic valve configuration.

These model names should be treated as application references, not as the only fitment proof. Kobelco excavators may use different solenoid valves according to serial number, hydraulic system layout, market version and previous repair history.

For accurate ordering, compare the old solenoid valve, connector plug, coil color, valve body shape, KWE5K marking and installation position before quotation.

How to Confirm the Correct Rotate Brake Solenoid Valve

Before ordering, compare the removed solenoid valve carefully. This is especially important for repair shops and distributors handling multiple Kobelco SK series solenoid valve references.

• Confirm whether the old valve number is YN35V00051F1, YB35V00006F1 or a listed checking reference.

• Compare KWE5K-31/G24YB50 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 whether the valve is installed in the rotate brake or swing brake hydraulic circuit.

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

Common Failure Symptoms

A rotate brake solenoid valve may need replacement when the excavator shows swing brake release problems, abnormal swing holding, delayed rotation response, intermittent swing operation, 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 passages or internal valve sticking can create similar issues.

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

Troubleshooting Before Replacement

Before ordering a YN35V00051F1 / YB35V00006F1 replacement valve, check the related electrical and hydraulic control circuit. This helps avoid replacing the wrong component and reduces repeated repair cost.

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

• Check wiring harness continuity between the valve, controller and swing brake control circuit.

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

• Inspect hydraulic oil cleanliness, filters and pilot pressure condition.

• 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 area before removing the old valve to prevent dust, water 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, O-ring condition and port end design. Do not force the connector if the plug shape or pin layout is different.

After installation, check swing response, rotate brake release, leakage, fault code status and machine operation at low load first. Clean hydraulic oil and stable electrical connections help reduce repeated solenoid valve failure.

Buying Notes for Repair Shops and Parts Distributors

For repair shops, this YN35V00051F1 / YB35V00006F1 rotate brake solenoid valve is suitable for Kobelco excavator swing brake troubleshooting when the old valve is damaged, stuck, leaking or unable to respond correctly. For distributors, it can be supplied as a common Kobelco SK series hydraulic electrical replacement part.

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 YB35V00006F1 / YN35V00051F1 rotate brake solenoid valve used for Kobelco excavator swing brake hydraulic control applications.

What is the relationship between YN35V00051F1 and YB35V00006F1?

Both numbers are used in market searches for this Kobelco rotate brake solenoid valve direction. The removed valve number, KWE5K marking and physical configuration should still be checked before ordering.

What is KWE5K-31/G24YB50?

KWE5K-31/G24YB50 is commonly used as the valve model reference for this rotate brake solenoid valve. Please compare the marking with the old valve before shipment.

Which Kobelco models are the main references?

The main model references on this page are Kobelco SK170-8, SK200-8 and SK350-8. Other SK series models may appear in aftermarket references, but final fitment should be checked by old valve and machine information.

What should I check before ordering?

Please check the old valve number, KWE5K 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 rotate brake 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.