- EN
Decompose pictures
| Reference Number | Part Name | Description & Function |
|---|---|---|
| 1 | Solenoid Coil Assembly | 24V DC encapsulated electromagnetic coil. Generates the controlled magnetic field to actuate the hydraulic spool valve. |
| 2 | Coil Locking Nut | Threaded steel nut that firmly secures the solenoid coil to the valve body, preventing loosening under severe vibration. |
| 3 | Valve Body (Iron) | High-grade cast iron main housing with precision-machined internal bores and oil flow galleries for durability. |
| 4 | Control Spool | Hardened, precision-ground steel spool that shifts linearly to direct high-flow hydraulic oil between ports. |
| 5 | Return Spring | High-cycle fatigue-resistant spring that forces the spool back to its neutral fail-safe position when de-energized. |
| 6 | Sealing Elements (Rubber) | Oil-resistant Viton/Nitrile O-rings and backup rings ensuring a completely leak-proof interface with the manifold. |
| 7 | Manual Override Pin | Mechanically actuated pin allowing manual spool operation for system diagnostics when electrical power is unavailable. |
| 8 | DIN Connector Port | Industry-standard DIN 43650 Form A electrical socket providing a secure, weather-resistant wiring harness connection. |
Parts list
| Item | OEM Reference No. | COGENG Part No. | Description | Qty |
|---|---|---|---|---|
| 1 | K1047557 | CG-K1047557 | Solenoid Valve Complete Assembly — Iron Body with Rubber Seals | 1 |
| 2 | — | CG-SEAL-K1047557 | Replacement Seal Kit (Viton O-Rings & Rubber Backup Rings) | 1 Set |
| 3 | — | CG-COIL-24V-DX | 24V DC Replacement Solenoid Coil Assembly with Locking Nut | 1 |
| 4 | — | CG-CONN-DIN-A | DIN 43650 Form A Electrical Connector (Square Plug with Rubber Gasket) | 1 |
| 5 | — | CG-OVERRIDE-PIN | Replacement Manual Override Pin Assembly | 1 (Optional) |
| Brand | Part Number |
|---|---|
| COGENG | K1047557 |
| Doosan | K1047557 |
| Interchange | K1047558, K1047559, K1047560, 400410-00051A, 400410-00052A |
| Parameter | Specification |
|---|---|
| Voltage Rating | 24V DC |
| Current Draw | 0.6 - 1.2 A @ 24V DC |
| Coil Resistance | 18 - 35 Ω @ 20°C |
| Duty Cycle | 100% continuous rating |
| Insulation Class | Class F (155°C) / Class H (180°C) |
| Protection Rating | IP65 / IP67 / IP69K |
| Electrical Connection | Deutsch DT type (2-pin) or Doosan OEM |
| Surge Protection | Built-in suppression diode |
| Power Consumption | Approx. 18-28 W |
| Parameter | Specification |
|---|---|
| Valve Type | 3-way / 2-position pilot solenoid |
| Maximum Operating Pressure | 350 bar (5,075 psi) |
| Pilot Pressure Range | 10 - 30 bar (145 - 435 psi) |
| Flow Capacity | Up to 25 L/min (6.6 GPM) |
| Response Time (On) | ≤ 50 ms |
| Response Time (Off) | ≤ 40 ms |
| Leakage (Internal) | ≤ 5 drops/min @ rated pressure |
| Fluid Compatibility | Mineral oil, synthetic hydraulic fluids |
| Parameter | Specification |
|---|---|
| Valve Body Material | High-strength steel / zinc-nickel plated |
| Spool Material | Hardened alloy steel (58-62 HRC) |
| Seal Material | NBR / HNBR / FKM (Viton) |
| Spring Material | Stainless steel |
| Port Thread Size | Doosan standard pilot line threads |
| Mounting Interface | Doosan standard / ISO 4401 |
| Weight | 0.40 - 0.60 kg (0.88 - 1.3 lbs) |
| Dimensions (L×W×H) | 65 × 45 × 50 mm (approx.) |
| Parameter | Rating |
|---|---|
| Operating Temperature | -40°C to +90°C (-40°F to +194°F) |
| Storage Temperature | -40°C to +105°C (-40°F to +221°F) |
| Vibration Resistance | 15G @ 50-500Hz |
| Ingress Protection | IP67 / IP69K |
| Corrosion Protection | 500+ hours salt spray |
| Model | Series | Application |
|---|---|---|
| DX225LC | Standard | Pilot control, attachment switching, swing brake |
| DX225LC-7 | Dash 7 | Pilot control, attachment switching, swing brake |
| DX225LC-7G | Dash 7G | Pilot control, attachment switching, swing brake |
| DX225LC-9 | Dash 9 | Pilot control, attachment switching, swing brake |
| Function | Description |
|---|---|
| Pilot Shut-Off (PSO) | Safety cut-off for hydraulic pilot controls |
| Attachment Switching | Selects between hydraulic attachments (breaker, shear, auger) |
| Swing Brake Release | Controls excavator swing brake engagement |
| Travel Speed Change | Shifts between high/low travel speeds |
| Proportional Control | Smooth speed control for implement functions |
| Auxiliary Hydraulic Control | Controls additional hydraulic circuits |
Note: This solenoid valve is specifically designed for Doosan DX225LC and DX225LC-7 excavators. Verify compatibility with your equipment model and serial number before ordering. Contact COGENG with your machine details for exact application verification.
| Feature | Benefit |
|---|---|
| Precision-ground spool | Consistent flow control, minimal leakage |
| High-quality copper coil | Reliable electrical operation, long life |
| Corrosion-resistant plating | Withstands harsh environments |
| Direct fit accuracy | No modifications required |
| 100% factory tested | Every valve individually tested |
| Surge protection diode | Prevents voltage spike damage |
| IP69K rated | Withstands high-pressure washdown |
| Test | Method | Criteria |
|---|---|---|
| Coil Resistance | 100% measurement | Within specification (±5%) |
| Dielectric Strength | 1500V AC/60s | No breakdown |
| Insulation Resistance | 500V DC | ≥100 MΩ |
| Operational Test | Rated voltage applied | Proper spool movement, audible click |
| Leak Test (External) | 250 bar hydraulic pressure | No external leakage |
| Leak Test (Internal) | 250 bar hydraulic pressure | ≤5 drops/min |
| Flow Test | Certified test bench | Meets OEM flow curve |
| Cycle Test (Sample) | 1,000,000 cycles | No performance degradation |
| Step | Action | Critical Note |
|---|---|---|
| Preparation | ||
| 1 | Park machine on level surface, lower implements | Safety first |
| 2 | Release hydraulic pressure (cycle controls with engine off) | Prevents oil spray |
| 3 | Disconnect battery negative terminal | Electrical safety |
| 4 | Locate faulty solenoid valve | Consult service manual |
| Removal | ||
| 5 | Disconnect electrical connector | Inspect pins for damage |
| 6 | Identify and mark hydraulic lines | Prevents incorrect reconnection |
| 7 | Remove hydraulic lines (cap immediately) | Prevents contamination |
| 8 | Remove mounting bolts (usually 2 bolts) | Note bolt length/position |
| 9 | Remove old solenoid valve | Discard properly |
| Installation | ||
| 10 | Clean mounting surface thoroughly | Remove old gasket material |
| 11 | Install new solenoid valve with new seals | Use new O-rings (included) |
| 12 | Torque mounting bolts to specification | 8-12 Nm (6-9 ft-lbs) |
| 13 | Reconnect hydraulic lines (remove caps just before) | Verify correct routing |
| 14 | Reconnect electrical connector | Ensure fully seated, locking tab engaged |
| 15 | Reconnect battery (positive last) | — |
| Final | ||
| 16 | Start machine, check for leaks at idle | Run for 2-3 minutes |
| 17 | Cycle function 5-10 times to bleed air | Listen for proper operation |
| 18 | Re-check for leaks under pressure | Inspect all connections |
| 19 | Test all related functions | Verify normal operation |
| Warning | Detail |
|---|---|
| Hydraulic pressure | Always relieve pressure before servicing (up to 350 bar / 5,075 psi) |
| Hot surfaces | Allow machine to cool before touching |
| Electrical shock | Always disconnect battery before working |
| Eye protection | Wear safety glasses when working with hydraulic systems |
| Machine stability | Ensure equipment is stable, lower implements, engage safety lock |
| Voltage | 24V DC only. Do not connect to 12V or other voltages |
Q: What are the symptoms of a failing solenoid valve on a Doosan DX225LC or DX225LC-7?
A: Common symptoms include the controlled hydraulic function failing to operate or operating intermittently, slow or delayed response when the function is activated, the solenoid clicking but no hydraulic movement, the solenoid coil overheating, blown fuses related to the solenoid circuit, or the machine being stuck in a single operating mode. A faulty solenoid valve can also trigger diagnostic trouble codes within the Doosan machine control system.
Q: Is this solenoid valve a direct plug-and-play replacement?
A: Yes, the COGENG K1047557 solenoid valve is manufactured to exact OEM specifications for mounting dimensions, hydraulic port configuration, electrical connector type, voltage rating, coil resistance, and valve spool stroke. It is a direct plug-and-play replacement requiring no modifications when installed on compatible Doosan DX225LC or DX225LC-7 excavators.
Q: What voltage does this solenoid valve operate on?
A: This solenoid valve is designed to operate on the standard voltage specified by Doosan for the K1047557 part number. Doosan excavators typically use a 24V DC electrical system, but always verify your machine's system voltage before installation to ensure proper solenoid operation and to prevent coil damage.
Contact COGENG
📞 Phone: +86-185-2913-1515 🌐 Instagram
📧 Email: hugo@cogeng.net 🌐 Facebook：Excavator Parts Selection and Replacement Community
💬 WhatsApp +86-185-2913-1515 Facebook: Excavator Wiring Harness
💬 WeChat: +86-185-7865-1106 Facebook: Excavator Wire Harness
🌐 Website: cogeng.net Facebook: Excavator SolenoidValve
#ExcavatorWiringHarness #ExcavatorThrottleMotor #ExcavatorSolenoidValve #ExcavatorSealKit
