YN35V00052F1 Kobelco Hydraulic Pump Solenoid Valve - K3V Series - SK200-8 / SK210-9 / SK250-8

Hydraulic Pump Solenoid Valve for Kobelco SK200-8 / SK210-9 — Replaces YN35V00052F1

Fix your slow hydraulics. This is the proportional reducing valve — the "green solenoid" — that controls pump flow on the K3V hydraulic pump. When it fails, your excavator moves in slow motion. Replaces Kobelco OEM part numbers YN35V00052F1 and YN35V00048F1.

The Problem

Your excavator is sluggish. The boom lifts slowly, the engine bogs under load, or you're getting P-code errors on the monitor. The dealer wants $450–$600 for this solenoid and another week of your machine sitting idle. Meanwhile, every day that 20-ton excavator sits is $500–$1,000+ in lost revenue.

The Solution

This is the proportional reducing solenoid valve that controls the swash plate angle on your K3V main hydraulic pump. It tells the pump how much flow to produce — when it fails, the pump can't respond to operator demand and the machine goes into "slow motion." This replacement valve restores full hydraulic performance. Direct drop-in replacement for YN35V00052F1. No modifications needed.

Identification

• Visual ID: Green plastic coil on a silver cartridge valve body
• Location: Bolted to the side of the main hydraulic pump (K3V series)
• Quantity: There are 2 per pump — many mechanics replace both at the same time as preventative maintenance

Specifications

• Kobelco OEM Part Number: YN35V00052F1 (current) / YN35V00048F1 (superseded)
• Type: Proportional Reducing Valve (Solenoid)
• Pump Compatibility: K3V Series Hydraulic Pumps (K3V63, K3V112, K3V140, K3V180)
• Coil Color: Green
• Condition: Brand New

Compatible Equipment

The YN35V00052F1 solenoid fits all excavators using the K3V series hydraulic pump:

Kobelco Excavators

• Kobelco SK200-8 Excavator
• Kobelco SK210-9 Excavator
• Kobelco SK210LC-8 Excavator
• Kobelco SK250-8 Excavator
• Kobelco SK260-8 Excavator
• Kobelco SK330-8 Excavator
• Kobelco SK350-8 Excavator

New Holland Excavators

• New Holland E215 Excavator
• New Holland E235 Excavator

Case Excavators

• Case CX210B Excavator
• Case CX240B Excavator

Also Fits (K3V Pump Equipped)

• Daewoo / Doosan DX225 (K3V pump versions)
• Sany SY215C (K3V pump versions)
• Volvo EC210B (K3V pump versions)

The K3V hydraulic pump is used across dozens of excavator brands. If your machine has a K3V pump and you can see the green solenoid on the side, this is the correct valve. Check your parts manual for YN35V00052F1 or YN35V00048F1 to confirm.

Why Buy From Trenchwell?

• Save Over 50%: Dealers charge $450–$600 for this solenoid. We offer it at $225 — same part, smarter supply chain.
• OEM-Spec Quality: This is NOT a cheap knockoff. This is an OEM-specification proportional valve that meets the same performance standards as the factory-installed part.
• Buy in Pairs: There are 2 solenoids per pump. Smart mechanics replace both at once. Contact us for pair pricing.
• Fast Shipping: In stock and ready to ship. Your excavator can't sit idle while the dealer takes 2 weeks to source a solenoid.
• Drop-In Fit: Direct replacement — unbolt the old solenoid, bolt on the new one, and you're back to full speed.

Symptoms of a Failed Pump Solenoid

• Slow boom lift and arm movement — machine feels "weak"
• Engine bogging under hydraulic load
• P-code errors on the excavator monitor
• Pump not developing full pressure or flow
• Machine works fine at idle but loses power under load
• Erratic hydraulic response — jerky or inconsistent movements

Installation Notes

When replacing the YN35V00052F1 solenoid:

• Shut down the engine and relieve all hydraulic pressure before working on the pump
• The solenoid is bolted to the side of the K3V pump — 2 bolts and an electrical connector
• Note the orientation and wiring before removal
• Install the new solenoid with new O-rings (if included) and torque bolts to spec
• Reconnect the electrical connector — verify secure click
• Start the engine and test all hydraulic functions at idle, then under load
• Clear any stored fault codes from the excavator monitor
• If replacing one, strongly consider replacing the second solenoid on the same pump — if one has failed, the other is likely near end of life

Frequently Asked Questions

How do I know if this solenoid is causing my slow hydraulics?
The "green solenoid" (proportional reducing valve) is the #1 failure point on K3V pumps. If your excavator has slow, weak hydraulics and the pump pressure is low, this solenoid is the first thing to check. It controls the swash plate angle — when it fails, the pump can't produce full flow regardless of operator input. If you see P-codes related to pump control or proportional valve errors, this is almost certainly the culprit.

Should I replace both solenoids?
We strongly recommend it. There are 2 proportional solenoids per K3V pump. They experience the same operating hours and conditions. If one has failed, the other is statistically near failure. Replacing both eliminates the risk of a repeat failure and another round of downtime. Contact us for pair pricing.

Will this fit my Kobelco SK200-8?
Yes. The SK200-8 uses the K3V112 hydraulic pump, and the YN35V00052F1 proportional solenoid is the correct valve. It also supersedes the older part number YN35V00048F1. If your parts book shows either number, this is the right part.

Does this fit other brands besides Kobelco?
Yes. The K3V pump is used across many excavator brands. This same solenoid fits New Holland E215, Case CX210B, and select models from Daewoo/Doosan, Sany, and Volvo that use the K3V pump platform. Check your pump for the green solenoid — if it's there, this is the replacement.