It is the core pressure control component of JCB powershift gearbox system. It converts ECU 12V electrical signals into linear proportional hydraulic pressure to control shift valve spool stroke, realize smooth jerk-free forward, reverse and high/low speed gear shifting during cargo loading, stacking and short-distance transfer.
| Specification | Detailed Information |
|---|---|
| Brand | ZVEZDA |
| Full Product Name | JCB 3CX 4CX Backhoe Loader 12V Powershift Transmission Proportional Solenoid Valve 25/974628 (25974628) |
| OEM OE Number | 25/974628 / 25974628 |
| Applicable Machine Serial No. | 0960000 – 0999999 |
| Compatible Machine | 3CX, 4CX Powershift Backhoe Loader |
| Rated Voltage | DC12V |
| Condition | 100% Brand New Aftermarket OEM Equivalent Complete Cartridge Solenoid |
| Origin | Guangdong, China |
| Core Material | Full Nitride Hardened Multi-groove Alloy Spool + Low Drift Pure Copper Electromagnetic Coil |
| Wiring Connector | Black Rectangular Fully Sealed Waterproof Plug |
| Installation Position | Backhoe Loader Powershift Gearbox Cartridge Valve Hole |
| Shipment Lead Time | Dispatched within 1–7 working days after payment confirmation |
| Outer Packaging | Neutral Export Carton + Shockproof EPE Foam Inner Liner |



| Komatsu Parts | JCB Parts | Other Brand Parts |
|---|---|---|
| 20Y-43-41780 | 331/30884 | 4520781 |
| 22U-06-22420 | 331/30885 | 4581230 |
| 22U-06-22380 | 331/30886 | 4601592 |
| 782-5301-301 | 701/80284 | 4632710 |
| 782-5301-302 | 701/80285 | 4678921 |
| 7824-30-1600 | 11S-49 | 4756890 |
| 7825-30-1301 | 60117463 | 4721563 |
| 7825-30-1302 | 60117463LM | 4739125 |
| 7861-92-4130 | 60117464 | 4772106 |
| 7861-92-4131 | 60117465 | 4789321 |
| 20Y-43-41781 | YQ05.251.046 | 4801234 |
| 20Y-43-41782 | YQ05.251.047 | 106-0107 |
| 22U-06-22390 | YQ05.251.048 | 106-0108 |
| 22U-06-22400 | YN20S00002F3 | 106-0109 |
| 7821-30-1500 | YN20S00002F4 | 165-9569 |
| 7822-30-1200 | YN20S00002F5 | 206-3305 |
| 7823-30-1400 | LQ50S00001P1 | 134-0649 |
| 7826-30-1100 | LQ50S00001P2 | 144-6670 |
| 7827-30-1000 | 8-98074-566-0 | 152-8973 |
| 7828-30-0900 | 8-98074-567-0 | 171-2540 |
| 7829-30-0800 | 4812369 | 183-4216 |
| 20Y-43-41790 | 256-7891 | 191-6527 |
| 20Y-43-41800 | 300661-00004A | 212-7890 |
| 708-2H-25240 | 21Q6-20820 | 214-5620 |
| 702-21-07010 | K1013849 | 0419-9902 |
| 702-21-07311 | 332/G0912 | 0419-9903 |
| 702-21-07610 | 60117466 | 223-8181 |
| 702-21-57400 | YQ05.251.049 | 224-2092 |
| 585-9230 | YN20S00003F1 | 225-0300 |
| 627-2304 | 7820-30-1700 | 253-3809 |
| 585-9231 | 4791230 | 231-8194 |
| 702-21-58100 | 403-0363 | 198-6528 |
| 702-21-57500 | 485-5747 | 328-4314 |
| 702-21-60700 | 375-4414-02 | 384-3892 |
| 714-07-16730 | 485-9850-03 | 485-5747 |
| 201-0950 | 485-9850-03 | 491-0908 |
| 25/220804 | 491-0908 | 553-5204 |
| 25/220994 | 25/220804 | 25/220994 |
| 31Q6-20131 | 25/220994 | 31Q6-91220 |
| 31Q6-91220 | 31Q6-20131 | 086-1879 |
| 086-1879 | 31Q6-91220 | 31765-FC000 |
| 31765-FC000 | 086-1879 | 053400-0745 |
| 053400-0745 | 31765-FC000 | 419-15-47221 |
| 419-15-47221 | 053400-0745 | KDRDE5K-20/40C04 |
| KDRDE5K-20/40C04 | 419-15-47221 | 31Q6-91720 |
| 31Q6-91720 | KDRDE5K-20/40C04 | 25/220804 |
| 25/220804 | 31Q6-91720 | 25/974628 |
| 25/974628 | 25/220804 | 25/974628 |
| No. | Question | Standard Answer |
|---|---|---|
| Q1 | Which JCB backhoe loader fits 12V transmission solenoid 25/974628 25974628? | This 12V threaded cartridge shift solenoid is specially made for JCB 3CX and 4CX powershift backhoe loader with serial number range 0960000 to 0999999. |
| Q2 | What is the difference between this model and 25/220994? | They are different voltage versions, this one is 12V for late model 3CX/4CX, while 25/220994 is 24V for earlier serial number machines and cannot be interchanged. |
| Q3 | What abnormal gearbox faults will appear once this solenoid fails? | Hard gear engagement, obvious jerk during shifting, transmission slipping under heavy load, unstable driving speed and delayed gear response. |
| Q4 | Is complicated disassembly needed during replacement? | No, it is a standard threaded cartridge structure, only unscrew the old valve core and install the new one, no need to disassemble the internal valve block of the transmission. |
| Q5 | What wear-resistant process guarantees long service life? | The whole spool adopts full ion nitriding hardening treatment, matched double HNBR high temperature sealing rings, effectively reduce friction and prevent oil leakage after long hours of operation. |
| Q6 | How to quickly judge coil damage before installation? | Use multimeter to measure coil resistance, normal range 7–7.5 ohms; infinite resistance means open circuit, resistance below 5 ohms indicates internal short circuit and cannot be installed. |