| Part Numbers | 702-21-57400, 702-21-55901, 702-21-55600 |
| Product Name | Komatsu Solenoid Valve Set (PPC / PC-EPC Pump Control Valves) |
| Supplier / Channel | COGENG (Factory Direct Supply) – Direct Fit OEM-Spec Replacement |
| Valve Type | Electro-Hydraulic Proportional Solenoid Valves |
| Compatible Models | Komatsu PC200-7, PC200-8, PC220-7, PC220-8 (Also fits PC210-7/8, PC230-7/8) |
| Application Location | Main Hydraulic Pump Regulator Assembly (Controls pump swash plate angle for flow and horsepower) |
| System Voltage | 24V DC |
| Connector Type | 2-Pin Weather-Sealed (Deutsch DT or Sumitomo equivalent) |
| Control Type | PWM (Pulse Width Modulation) from Engine/ECM Controller |
| Typical Pressure Range | 0 – 35 bar (Pilot control signal output) |
| Set Includes | 3 x Solenoid Valves (Complete set for both pumps: Front Pump + Rear Pump PC-EPC solenoids, plus LS-EPC or Backup valve) |
| № | Number | Name | Qty |
| 708-2L-00600 | PUMP ASS'Y | 1 | |
| THIS ASSEMBLY CONSISTS OF ALL PARTS SHOWN IN FIGS.Y1600-01A0 T0 Y1600-11A0. | |||
| 1 | 702-21-57400 | • PILOT VALVE | 1 |
| 2 | 723-11-19960 | •• O-RING | 1 |
| 3 | 702-21-54910 | •• O-RING | 2 |
| 4 | 01252-60635 | • BOLT | 2 |
| 5 | 20Y-62-22790 | • BAND, RED | 1 |
| 6 | 702-21-57400 | • PILOT VALVE | 1 |
| 7 | 723-11-19960 | •• O-RING | 1 |
| 8 | 702-21-54910 | •• O-RING | 2 |
| 9 | 01252-60635 | • BOLT | 2 |
| 10 | 20Y-62-22830 | • BAND, WHITE | 1 |
| 11 | 702-21-57400 | • PILOT VALVE | 1 |
| 12 | 723-11-19960 | •• O-RING | 1 |
| 13 | 702-21-54910 | •• O-RING | 2 |
| 14 | 01252-60635 | • BOLT | 2 |
| 15 | 20Y-62-22810 | • BAND, YELLOW | 1 |
| 16 | 708-2L-35941 | • PLUG | 2 |
| 17 | 07000-B1008 | • O-RING | 2 |
| 18 | 07001-01008 | • RING,BACK-UP | 4 |
| 19 | 07002-61423 | • O-RING | 2 |
Q: What are the functions of the 702-21-57400, 55901, and 55600 valves?
A: These three solenoid valves control different pilot functions on the PC200-8/PC220-7 main control valve. They regulate pilot oil flow for boom, arm, bucket, and swing priority circuits. Replacing all three ensures consistent response across all implement functions.
Q: Why replace all three solenoid valves as a set?
A: These valves share the same pilot oil circuit and operate under identical conditions. If one has failed due to contamination or electrical wear, the others are likely nearing the end of their service life. Replacing the complete set prevents repeat downtime and labor costs.
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