YB35V00048F1 YN35V00048F1 Proportional Hydraulic Pump Solenoid Valve for Kobelco SK200-8 SK250-8 SK260-8

YB35V00048F1 YN35V00048F1 Proportional Solenoid Valve for Kobelco Hydraulic Pump

The YB35V00048F1 / YN35V00048F1 proportional hydraulic pump solenoid valve is supplied for Kobelco excavator hydraulic pump control system repair. It is commonly used as a proportional solenoid valve reference for Kobelco SK200-8, SK250-8, SK260-8 and related SK-8 excavator hydraulic pump applications.

This page focuses on YB35V00048F1 and YN35V00048F1 as the main part numbers. KDRDE5K-31/30C50-122 and KDRDE5K-31/30C50-122/107 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 pump position and machine information before ordering.

Part Number and Valve Type Notes

YB35V00048F1 and YN35V00048F1 are the main Kobelco part number directions for this product page. In many aftermarket searches, buyers may also search this valve by the model reference KDRDE5K-31/30C50-122.

This product should be described as a proportional hydraulic pump solenoid valve. It is different from a stop solenoid valve, safety lock solenoid valve or general pilot solenoid valve. Mixing different solenoid valve functions on one page can make the page less clear for both buyers and search engines.

Some listings may show close valve model formats, but similar KDRDE5K valves can differ by coil, connector, hydraulic function, pressure setting or valve body design. The removed valve and actual installation position should be checked before shipment.

Application Reference for Kobelco SK-8 Excavators

The strongest model references for this page are Kobelco SK200-8, SK250-8 and SK260-8. Public aftermarket references may also mention SK130-8, SK170-8, SK210-8, SK210LC-8, SK330-8 and SK350LC-8 depending on machine version and hydraulic pump 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 pump arrangement, control valve layout and market version.

For accurate ordering, compare the old solenoid valve, connector plug, coil color, valve body shape, KDRDE5K marking and installation position on the hydraulic pump before quotation.

How to Confirm the Correct YN35V00048F1 Solenoid Valve

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

• Confirm whether the old valve number is YN35V00048F1, YB35V00048F1 or a listed checking reference.

• Compare KDRDE5K-31/30C50-122 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 pump or related control block.

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

Common Failure Symptoms

A proportional hydraulic pump solenoid valve may need replacement when the excavator shows unstable hydraulic pump output, slow response, weak hydraulic power, abnormal pump control, intermittent machine movement, error code related to the solenoid circuit or poor proportional control performance.

These symptoms are not always caused by the solenoid valve itself. Wiring harness damage, loose connector pins, low voltage, controller signal problems, hydraulic oil contamination, pump control pressure problems or internal pump wear can create similar issues.

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

Troubleshooting Before Replacement

Before ordering a YN35V00048F1 / YB35V00048F1 replacement valve, check the related pump control circuit. 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 between the valve, controller and pump control circuit.

• Measure voltage or control signal at the connector when the valve is commanded.

• Inspect hydraulic oil cleanliness, filters and pump control 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 and pump 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, O-ring condition and port end design. Do not force the connector if the plug shape or pin layout is different.

After installation, check hydraulic response, pump control performance, 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 YN35V00048F1 / YB35V00048F1 proportional solenoid valve is suitable for Kobelco excavator hydraulic pump control troubleshooting when the old valve is damaged, stuck, leaking or unable to regulate pump output correctly. For distributors, it can be supplied as a common Kobelco SK-8 series hydraulic electrical 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 YB35V00048F1 / YN35V00048F1 proportional hydraulic pump solenoid valve used for Kobelco excavator hydraulic pump control applications.

What is the relationship between YN35V00048F1 and YB35V00048F1?

Both numbers are used in market searches for this Kobelco proportional hydraulic pump solenoid valve direction. The removed valve number, KDRDE5K marking and physical configuration should still be checked before ordering.

What is KDRDE5K-31/30C50-122?

KDRDE5K-31/30C50-122 is commonly used as the valve model reference for this proportional solenoid valve. Please compare it with the marking on the old valve before shipment.

Which Kobelco models are the main references?

The main model references on this page are Kobelco SK200-8, SK250-8 and SK260-8. Other SK-8 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, 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 proportional solenoid valve failure?

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