The COGENG 114-0616 Hydraulic Control Solenoid Valve is a high-quality, direct OEM replacement solenoid valve specifically designed for Caterpillar 312B, 315BL, 325BL, and 330BL excavators. This critical electro-hydraulic component controls the flow of hydraulic fluid to various machine functions, including:
Boom Control – Raise/Lower
Arm Control – In/Out
Bucket Control – Curl/Dump
Swing Control – Left/Right
Travel Control – Forward/Reverse (Left and Right tracks)
Auxiliary Hydraulics – Attachments (breaker, shear, compactor, etc.)
The solenoid valve receives electrical signals from the machine's controller (ECU/VCU) and converts them into mechanical movement to open/close hydraulic passages or proportionally control flow and pressure. This allows the machine to provide precise, responsive control of all hydraulic functions.
Manufactured under ISO9001 certified processes, the COGENG 114-0616 features a durable iron housing, premium rubber O-rings, and high-quality copper coil windings to ensure reliable operation in the harsh conditions of heavy construction—constant vibration, pressure surges, temperature extremes (-40°C to +120°C), and exposure to hydraulic oil and debris.
Why Choose COGENG 114-0616?
Direct OEM Replacement: Plug-and-play for CAT 312B/315BL/325BL/330BL.
High-Quality Coil: Precision-wound copper coil for consistent magnetic force.
Leak-Proof Design: Premium rubber seals prevent hydraulic fluid leakage.
Durable Construction: Iron housing withstands impact and corrosion.
Precise Control: Proportional valve variant allows smooth, variable flow control.
In Stock: Ready for immediate shipment.
| Specification Category | Details |
|---|---|
| COGENG Part Number | 114-0616 |
| Compatible OEM Part | Caterpillar® 114-0616 |
| Application | Control Valve Solenoid Cartridge (Pilot Control) |
| Compatible Models | 312B, 312BL, 315BL, 325BL, 330BL (Please verify specific machine serial number) |
| Voltage | 24V DC (Standard for these models) |
| Electrical Coil | High-Temperature Copper Windings |
| Insulation Class | Class H (or higher) |
| Housing Material | High-Strength Steel/Alloy |
| Seals | Buna-N (Standard) - Compatible with standard hydraulic oils |
| Operating Temperature | -40°C to +120°C (-40°F to +248°F) |
| Thread/Port Type | OEM-specific cartridge thread |
| Manufacturer | COGENG |
| Warranty | Limited 1-Year Warranty |
| NO | Number | Name | Qty |
| 114-0616 | VALVE GP-SOLENOID | 1 | |
| 1 | 095-1750 | SEAL-O-RING | 1 |
| 2 | 6V-8398 | SEAL-O-RING | 1 |
| 3 | 095-1751 | SEAL-O-RING | 1 |
| 4 | 095-1586 | SEAL-O-RING | 1 |
| Model | Application / Circuit |
|---|---|
| Cat 312B (1999–2005) | Main control valve – pump regulator or attachment control |
| Cat 315BL (1998–2005) | Main control valve – hydraulic pilot system |
| Cat 325BL (1998–2005) | Main control valve – swing parking brake or pump displacement |
| Cat 330BL (1998–2005) | Main control valve – boom/arm priority or hammer circuit |
Typical functions (varies by machine configuration):
Pump regulator solenoid (proportional) – controls pump displacement (hp or flow)
Swing brake solenoid (on/off) – releases swing parking brake
Straight travel solenoid (on/off) – engages straight travel function
Hydraulic attachment solenoid (on/off) – enables hammer/rotator flow
Boom/arm priority solenoid – adjusts oil distribution
Proportional reducing valve – pilot pressure control
✅ Cross reference: Equivalent to Cat OEM part numbers such as:
114-0616(original Cat number)
162-0076(later supersession)
102-8803(similar solenoid family)Aftermarket matches: COGENG 114-0616, ITR, Hidromek, CGR
Symptoms of failure:
Slow or no swing (swing brake solenoid stuck closed)
Weak digging power (pump regulator solenoid stuck in low displacement)
Attachment not working (hammer solenoid no power)
Error codes (CID‑FMI) – e.g., CID 297 (proportional solenoid)
Locate on main control valve (label or trace wires)
Park machine on level ground, lower attachments
Shut off engine, remove key
Release hydraulic pressure (operate joysticks with engine off – 10 cycles)
Disconnect battery negative terminal
Clean area around solenoid (prevent dirt entry)
Disconnect electrical connector (push tab, pull apart)
Remove coil nut (if applicable) – some have retaining nut, others threaded body
Use a deep socket or box wrench to unscrew solenoid body (counter‑clockwise)
Remove and discard old O‑rings (usually 2: one at base, one on spool)
⚠️ Important: If solenoid has a cartridge body with spool, do not scratch spool surface. If it's a coil‑only type, you may replace only the coil (but COGENG 114-0616 is likely full assembly).
Lubricate new O‑rings with clean hydraulic oil
Install O‑rings on solenoid body (correct grooves)
Thread solenoid into valve body hand‑tight (no cross‑threading)
Torque to spec (see below)
Reconnect electrical connector (should click)
Reconnect battery
Start engine, idle for 30 seconds
Check for leaks around solenoid base
Test function (examples):
Swing brake solenoid – swing left/right; brake should release
Pump regulator solenoid – check digging power / engine load response
Attachment solenoid – activate hammer/tilt; should hear solenoid click
Use Cat ET (Electronic Technician) if available to monitor solenoid current / duty cycle
Complete System Safeguarding:
Secure the Machine: Park the excavator on a firm, level surface. Lower the attachment fully to the ground. Stop the engine.
Depressurize the Hydraulic System: Slowly loosen the hydraulic tank cap to release any residual air pressure. Gently move all control levers (travel, swing, boom, stick, bucket) through their full range to relieve any trapped high-pressure oil in the circuits.
Disconnect All Power Sources: Disconnect the negative (-) battery terminal to prevent any electrical shock or accidental engine start.
Maintain Impeccable Cleanliness:
The main control valve is highly sensitive to contamination. Thoroughly clean the area around the solenoid mounting port on the valve body before disassembly.
Use clean plugs or caps to seal any open ports immediately after removing the old solenoid to prevent dirt ingress.
Careful Handling & Installation:
Document Wiring: Note the position and orientation of the electrical connector before disconnecting it from the old solenoid.
Proper Removal: Use the correct tools to carefully unthread and remove the faulty solenoid cartridge from the valve body.
Use New Seals: Always install the new O-rings or seals provided with the COGENG valve. Lubricate them with clean hydraulic oil before installation to prevent cutting or rolling.
Correct Torque: Install the new COGENG 114-0616 solenoid by hand to avoid cross-threading, then tighten to the manufacturer's specified torque using a torque wrench. Do not overtighten.
Post-Installation System Check:
Reconnect the battery.
Start the engine and let it run at low idle. Visually inspect the new solenoid for any signs of hydraulic leakage around the seal.
Slowly and carefully operate all excavator functions to purge air from the system. Listen for smooth operation and check for any hesitation.
Perform a full operational test to ensure all functions controlled by the solenoid are working correctly and responsively.
Q: What causes jerky or erratic hydraulic movements on a CAT 320 excavator?
A: This is often caused by a failing pilot control solenoid valve like the 114-0616. When the valve cannot regulate pilot pressure smoothly, it results in jerky boom, arm, or bucket movements, especially during fine grading operations.
Q: How to test a CAT 114-0616 solenoid valve?
A: Measure coil resistance (typically 8-12 ohms). Check for clean signal voltage from the ECM. Inspect the valve spool for contamination or sticking. A common failure mode is internal wear causing inconsistent pilot pressure regulation.
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shipping Details Method:
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Contact information is provided at the bottom of the page.
Merchant Return Policy:
Products shipped are not eligible for return or exchange.
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