| Parameter | Specification |
|---|---|
| COGENG Part Number | 702-21-56241 |
| OEM Equivalent | Komatsu 702-21-56241 |
| Product Type | Hydraulic / Pneumatic Solenoid Valve |
| Voltage | 24V DC (Komatsu standard) |
| Mounting Type | Direct fit, bolt-on |
| Brand | Part Number |
|---|---|
| COGENG | 702-21-56241 |
| Komatsu | 702-21-56241 |
| Interchange | 702-21-56240, 702-21-56242 |
| Parameter | Specification |
|---|---|
| Voltage Rating | 24V DC |
| Current Draw | 0.8 - 1.2 A @ 24V DC |
| Coil Resistance | 20 - 28 Ω @ 20°C |
| Duty Cycle | 100% continuous rating |
| Insulation Class | Class F (155°C) / Class H (180°C optional) |
| Protection Rating | IP65 / IP67 (dust-tight, water-resistant) |
| Electrical Connection | Deutsch DT type (2-pin) or AMP/Tyco |
| Surge Protection | Built-in suppression diode (varistor optional) |
| Power Consumption | Approx. 20-28 W |
| Parameter | Specification |
|---|---|
| Valve Type | 2-way, 3-way, or 4-way (function dependent) |
| Maximum Operating Pressure (Hydraulic) | 350 bar (5,075 psi) |
| Maximum Operating Pressure (Pneumatic) | 10 bar (145 psi) |
| Pilot Pressure Range | 10 - 30 bar (145 - 435 psi) |
| Flow Capacity | Up to 25 L/min (6.6 GPM) hydraulic |
| Flow Capacity (Pneumatic) | Up to 500 L/min (17.7 CFM) |
| Response Time (On) | ≤ 45 ms |
| Response Time (Off) | ≤ 35 ms |
| Leakage (Internal) | ≤ 3 drops/min @ rated pressure |
| Fluid Compatibility | Mineral oil, synthetic hydraulic fluids, compressed air |
| № | Number | Name | Qty |
| 708-7S-00550 | MOTOR ASSEMBLY | 1 | |
| See Fig.C0110-03A0 | RADIATOR (FAN MOTOR AND MOUNTING PARTS) | ||
| 1 | 708-7S-11740 | • CASE | 1 |
| 2 | 07040-11007 | • PLUG | 1 |
| 3 | 07002-21023 | • O-RING | 1 |
| 708-7S-01430 | • COVER SUB ASSEMBLY | 1 | |
| 4 | •• COVER, END | 1 | |
| 5 | 708-7R-11210 | •• VALVE | 1 |
| 6 | 722-10-91130 | •• SPRING | 1 |
| 7 | 709-32-12861 | •• PLUG | 1 |
| 8 | 07002-21823 | •• O-RING | 1 |
| 9 | •• SPOOL | 1 | |
| 10 | 708-7S-18120 | •• SPRING | 1 |
| 11 | 708-7S-18310 | •• SPACER | 1 |
| 12 | 708-7S-18320 | •• COVER | 1 |
| 13 | 07000-E2020 | •• O-RING | 1 |
| 14 | 07000-E2025 | •• O-RING | 1 |
| 15 | 07000-E2012 | •• O-RING | 1 |
| 16 | 01252-60845 | •• BOLT | 4 |
| 708-7S-01440 | •• PILOT VALVE ASSEMBLY | 1 | |
| 17 | 702-21-56241 | ••• SOLENOID | 1 |
| 18 | 702-21-55870 | ••• O-RING | 1 |
| 19 | ••• CASE | 1 | |
| 20 | ••• SPOOL | 1 | |
| 21 | 702-21-56220 | ••• SPRING | 1 |
| 22 | 708-21-12541 | ••• PLUG | 1 |
| 23 | 01252-60616 | ••• BOLT | 2 |
| 24 | 708-2L-25490 | ••• O-RING | 1 |
| 25 | 708-2L-25480 | ••• FILTER | 1 |
| 26 | 702-21-54180 | ••• SCREW | 2 |
| 27 | 07000-F1008 | ••• O-RING | 1 |
| 28 | 708-7S-18230 | ••• O-RING | 1 |
| 29 | 07040-11007 | ••• PLUG | 1 |
| 30 | 07002-21023 | ••• O-RING | 1 |
| 31 | 708-2L-29460 | ••• ORIFICE | 1 |
| 32 | 708-1S-18180 | ••• COVER | 1 |
| 33 | 708-7S-18480 | ••• VALVE | 1 |
| 34 | ••• BALL | 1 | |
| 35 | 01252-60825 | •• BOLT | 4 |
| 36 | 708-7T-02281 | •• VALVE ASSEMBLY, RELIEF | 1 |
| 37 | 07000-F2016 | ••• O-RING | 1 |
| 38 | 07001-02016 | ••• RING | 1 |
| 39 | 07002-12434 | ••• O-RING | 1 |
Q: Symptoms of a faulty swing brake solenoid on a Komatsu PC400-8?
A: Common signs include the upper structure drifting when parked on an incline, swing brake failing to engage or disengage, and abnormal noise from the swing motor area during rotation.
Q: How to test the 702-21-56241 swing brake solenoid valve?
A: Check for 24V signal at the connector when swing function is activated. Measure coil resistance (typically 20-30 ohms). Listen for an audible "click" when energized. Contamination in the valve spool can also cause sticking; cleaning or replacement may be required.
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