| NO | Number | Name | Qty |
| Grp | 121-1490 | VALVE GP-SOLENOID | |
| 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 |
| 5 | 114-0623 | NUT AS (M6X1-THD) | 1 |
| OEM Part Number | 121-1490 / 1211490 |
| COGENG SKU | CG-SV-121-1490-BD |
| Brand | COGENG (Direct OEM Replacement) |
| Version Identifier | Blue Dot |
| Valve Type | Rotary / Swing Control Solenoid |
| Compatible Models | CAT E320, 325C, 330C, 330B LN, 330C FM, 330C L |
| Common Application | Swing Priority / Swing Brake Pilot Circuit |
| Key Feature | Blue dot version - verify dot color on your original valve |
Frequently Asked Questions
Q: What does the "Blue Dot" mean on the CAT 121-1490 solenoid?
A: The colored dot (Blue, Green, Red, etc.) on CAT solenoid valves indicates the internal calibration, flow rate, or pressure setting of the valve. The Blue Dot version of the 121-1490 is specific to certain 320/325/330 excavator swing control applications. Always replace a Blue Dot valve with another Blue Dot valve to ensure proper swing performance.
Q: What are symptoms of a failing 121-1490 rotary solenoid on a CAT 330C?
A: Common signs include sluggish or weak swing rotation, upper structure drifting on slopes, swing brake failing to release properly, or jerky swing movements. This solenoid controls pilot pressure for the swing priority and swing brake circuits.
Q: Will the 121-1490 fit my CAT E320 excavator?
A: Yes, the 121-1490 Blue Dot rotary solenoid valve is a direct fit for CAT E320, 325C, 330C, 330B LN, 330C FM, and 330C L excavators. Verify the part number and dot color on your original valve to confirm exact fitment.
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