| Specification Category | Details |
|---|---|
| COGENG Part Number | 174-4909 |
| Compatible OEM Part | Caterpillar® 174-4909 |
| Application | Hydraulic Pump Control Solenoid Valve |
| Compatible Models | D6N, D6R, D10N (Please verify specific series) |
| Voltage | 24V DC (Confirm system voltage for your machine) |
| Electrical Coil | High-Temperature Copper Windings, Class H Insulation |
| Housing Material | High-Strength Steel/Alloy |
| Seals | Buna-N (Standard) / Viton (optional, for extended service life) |
| Operating Pressure | Rated for High-Pressure Hydraulic Systems |
| Operating Temperature | -40°C to +120°C (-40°F to +248°F) |
| Manufacturer | COGENG |
| Warranty | Limited 1-Year Warranty |
| NO | Number | Name | Qty |
| Grp | 174-4909 | VALVE GP-SOLENOID | |
| 1 | 226-9622 | COIL AS-SOLENOID (24-VOLT) | 1 |
| 2 | 164-2108 | NUT (1/2-28-THD) | 1 |
| 3 | 218-2373 | NUT (1/2-28-THD) | 1 |
| 6V-4589 | SEAL-O-RING | 1 | |
| 6V-4589 | SEAL-O-RING |
1 |
Q: What are symptoms of a failing 174-4909 solenoid on a CAT D6R?
A: Common signs include harsh or delayed transmission shifting, specific gears failing to engage, the machine defaulting to neutral, or erratic blade response. This solenoid controls pilot pressure critical for transmission clutch and hydraulic valve function.
Q: Does the 174-4909 fit both D6 and D10 size dozers?
A: Yes, this solenoid valve is a common component shared across CAT D6N, D6R, and D10R track-type tractors. It is typically located on the transmission control valve body or pilot hydraulic manifold.
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