| Parameter | Specification |
|---|---|
| Part Number | 25/105100 (JCB OEM Reference) |
| Product Name | Hydraulic Solenoid Assembly / Solenoid Valve |
| Supplier / Brand | COGENG-Built (Factory Direct OEM-Spec Replacement) |
| System Voltage | 12V DC (Standard for JCB 3CX / 4CX electrical system) |
| Valve Type | Electro-Hydraulic Poppet or Spool Valve, Normally-Closed or Normally-Open (application specific) |
| Coil Resistance | Typically 6–12 Ω (Confirm with JCB service manual for your specific serial number) |
| Connector Type | 2-Pin (Often Deutsch DT or JCB-specific Superseal connector) |
| Compatible Models | JCB 3CX, 4CX, 1400B Series (Backhoe Loaders); may also fit various JCB Loadall, Fastrac, and Teletruk models depending on build specification |
| Typical Function | Transmission Cut-Off (Disconnect), Hydraulic Pilot Enable, or Quick Hitch Locking |
| Application Systems | Powertrain / Chassis / Hydraulics (Cross-refer to machine serial number Parts Book) |
| Item | Part | Description Nut STAKE NUT (M24) |
QTY |
| 1 | 826/00817 | 1 | |
| 2 | 823/00328 | Washer (25.25mm x 43.6mm x 4mm) | 1 |
| 3 | 450/10410 | Yoke M24 | 1 |
| 4 | 904/50023 | Seal Triple Lip, To Suit 55.0/54.81 Shaft Blue | 1 |
| 5 | 907/09600 | Bearing 35 x 73 x 24 | 1 |
| 6 | 445/09106 | Spacer collapsible | 1 |
| 7 | 907/05900 | Bearing | 1 |
| 8 | 460/05302 | Gear output 66T | 1 |
| 9 | 917/50100 | Bearing needle roller | 1 |
| 10 | 445/11700 | Clutch assembly, drop box | 1 |
| 28 | 916/50000 | Bearing ball | 1 |
| 29 | 2203/1076 | Circlip | 1 |
| 30 | 904/50023 | Seal Triple Lip, To Suit 55.0/54.81 Shaft Blue | 1 |
| 31 | 460/06502 | Cover 4wd clutch | 1 |
| 32 | 813/50007 | Gasket 4WD cover | 1 |
| 33 | 826/01417 | Setscrew flanged M10 x 30 | 12 |
| 34 | 450/10410 | Yoke M24 | 1 |
| 35 | 823/00328 | Washer (25.25mm x 43.6mm x 4mm) | 1 |
| 36 | 826/00817 | Nut STAKE NUT (M24) | 1 |
| 37A | 445/66100 | Valve non-return male/female | 1 |
| 38A | 1406/0011 | Washer Bonded (1/4") | 1 |
| 39 | 445/66200 | Pipe assembly | 1 |
| 40 | 25/974100 | Valve solenoid c/w AMP connectors | 1 |
| 40 | 25/105100 | Valve solenoid c/w AMP connectors | 1 |
| 40A | :25/974002 | Coil Vickers |
1 |
| 40A | ::25/974001 | Coil JFP |
1 |
Pre-Installation Safety
Park machine on level ground, lower all attachments, and engage parking brake
Stop engine and remove ignition key
Disconnect negative battery terminal
Slowly release hydraulic pressure by loosening tank cap and operating controls
Cleanliness Protocol
Thoroughly clean solenoid mounting area and connections
Use clean tools and replacement O-rings
Cap open ports immediately after disassembly
Prevent dirt contamination of hydraulic system
Installation Procedure
Note electrical connector orientation before disconnection
Remove old solenoid and discard O-rings
Lubricate new O-rings with clean hydraulic fluid
Hand-tighten new solenoid to avoid cross-threading
Torque to manufacturer's specification (typically 35-45 Nm)
Reconnect electrical connector securely
Post-Installation Verification
Reconnect battery and start engine
Check for leaks at operating pressure
Cycle controlled function several times
Verify proper operation through full functional test
Contact COGENG
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