| Specification Category | Details |
|---|---|
| COGENG Part Number | 122-5053 |
| Compatible OEM Part | Caterpillar® 122-5053 |
| Application | Engine Fuel Shut-off / Hydraulic Control Solenoid |
| Compatible Models | 325C, 322C Excavators; Equipment with 3126, 3126B Engines |
| Voltage | 12V or 24V DC (Confirm system voltage for your machine) |
| Electrical Coil | High-Temperature Copper Windings |
| Insulation Class | Class H (or higher) |
| Housing Material | High-Strength Steel with Corrosion-Resistant Plating |
| Seals | Buna-N (Standard for fuel and oil) |
| Operating Temperature | -40°C to +120°C (-40°F to +248°F) |
| Function | Normally Open / Normally Closed (Verify for specific application) |
| Manufacturer | COGENG |
| Warranty | Limited 1-Year Warranty |
| NO | Number | Name | Qty |
| Grp | 122-5053 | VALVE GP-SOLENOID | 1 |
| R | 20R-5615 | VALVE GP-SOL | 1 |
| 1 | RING-BACKUP | 1 | |
| 2 | SPACER-SPECIAL | 1 | |
| 3 | NUT-RETAINER (1/2-20-THD) | 1 | |
| 4 | SEAL-O-RING | 1 | |
| 5 | 9X-1484 | AVAILABLE REPAIR KIT(S) | 1 |
| OEM Part Number | 122-5053 / 1225053 |
| Brand | COGENG (Premium Aftermarket) |
| Valve Type | Hydraulic Pilot / Engine Fuel Control Solenoid |
| Application 1 | CAT 325C, 322C Excavator Pilot Hydraulic Circuit |
| Application 2 | CAT 3126, 3126B Engine Fuel System / Governor Control |
| Key Feature | Dual-purpose design for both hydraulic and engine fuel applications |
System Safety Preparation:
Park Safely: Position the machine on a level, stable surface. Lower all attachments to the ground. Stop the engine.
Depressurize Systems:
Fuel System: Relieve fuel system pressure by loosening the fuel filter cap slowly.
Hydraulic System: Slowly loosen the hydraulic tank cap and operate all control levers (with engine off) to relieve hydraulic pressure.
Disconnect Power: Disconnect the negative (-) battery terminal to prevent any electrical shorts or accidental starting.
Critical Cleanliness:
Fuel System: Absolutely prevent dirt from entering the fuel system. Clean the area around the solenoid thoroughly before disassembly.
Hydraulic System: Clean the solenoid and surrounding area meticulously to prevent contamination of the hydraulic system.
Immediately cap all open fuel or hydraulic lines after disconnection.
Careful Installation Steps:
Note Wiring: Carefully note the wiring configuration and disconnect the electrical connector.
Proper Removal: Remove the mounting bolts and/or lines to extract the old solenoid.
Use New Seals: Always install new O-rings, gaskets, or crush washers supplied with the COGENG valve. Lubricate seals with the appropriate fluid (fuel or oil).
Correct Torque: Install the new COGENG 122-5053 solenoid and tighten all fasteners to the manufacturer's specified torque values using a torque wrench.
Post-Installation System Check:
Reconnect the battery.
For Fuel Solenoids: Check for fuel leaks at the connections before starting. Cycle the key to check for the solenoid's audible "click" before cranking.
For Hydraulic Solenoids: Start the engine and run at low idle. Check for hydraulic leaks. Cycle the related hydraulic functions to purge air.
Perform a full operational test to ensure proper function.
Frequently Asked Questions
Q: Where is the 122-5053 solenoid located on a CAT 325C excavator?
A: On the 325C and 322C excavators, the 122-5053 solenoid is typically mounted on the pilot control manifold, regulating pilot oil pressure for precise implement control. Failure may cause jerky or unresponsive hydraulic functions.
Q: What is the function of the 122-5053 on a CAT 3126 engine?
A: On 3126 and 3126B engines, this solenoid valve is commonly part of the fuel injection pump or governor control system. It regulates fuel flow or rack position. Symptoms of failure include hard starting, engine stalling, or erratic idle speed.
Q: Is the 122-5053 solenoid the same for hydraulic and engine applications?
A: Yes, the base solenoid valve is the same part number. However, always verify the electrical connector orientation and mounting configuration against your specific application before installation.
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
