Guangzhou Qichao Machinery Parts Co., Ltd.
| Application | Excavator Main Pump Displacement Control |
| Packaging Details | Neutral Packing/Branded Packaging |
| Compatible Equipment | PC78MR-6, PC88MR-6 |
| MOQ Support | 1 Piece Sample Acceptable For On-site Machine Matching Test |
| Supply Ability | 1000PCS/MONTH |
| Payment Terms | T/T |
| Shipment Lead Time | 1–7 working days after payment confirmation |
| OE Part Number | 21W-60-42130 |
| Warranty | 6 Months |
| Model Number | PC78MR-6 PC88MR-6 |
| Place of Origin | China |
| Brand Name | ZVEZDA |
View Detail Information
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Product Specification
| Application | Excavator Main Pump Displacement Control | Packaging Details | Neutral Packing/Branded Packaging |
| Compatible Equipment | PC78MR-6, PC88MR-6 | MOQ Support | 1 Piece Sample Acceptable For On-site Machine Matching Test |
| Supply Ability | 1000PCS/MONTH | Payment Terms | T/T |
| Shipment Lead Time | 1–7 working days after payment confirmation | OE Part Number | 21W-60-42130 |
| Warranty | 6 Months | Model Number | PC78MR-6 PC88MR-6 |
| Place of Origin | China | Brand Name | ZVEZDA |
| High Light | hydraulic excavator solenoid valve ，excavator hydraulic solenoid valve ，displacement control excavator solenoid valve | ||
This mini excavator hydraulic main pump proportional solenoid coil OEM No.21W-60-42130, interchange OE number 21W6042130, rated DC12V, equipped with exclusive black square two-pin fully sealed waterproof plug, perfectly matches PC78MR-6, PC88MR-6 small hydraulic excavator main pump load sensing regulator circuit, also compatible with PC78US-6, PC78UU-6 same series mini excavator hydraulic control system.
| Specification | Detailed Information |
|---|---|
| Brand | ZVEZDA |
| Full Product Name | PC78MR-6/PC88MR-6/PC78US-6/PC78UU-6 Mini Excavator 12V Hydraulic Main Pump Proportional Solenoid Coil 21W-60-42130 (21W6042130) |
| OEM Part Number | 21W-60-42130 / 21W6042130 |
| Compatible Equipment | PC78MR-6, PC88MR-6, PC78US-6, PC78UU-6 Small Hydraulic Excavator |
| Matched System | Variable Displacement Hydraulic Main Pump Load Sensing Proportional Regulator Circuit |
| Rated Voltage | DC12V |
| Plug Feature | Black Square 2-Pin Fully Sealed Waterproof Plug |
| Condition | 100% Brand New Aftermarket OEM Equivalent Complete Coil Assembly |
| Origin | Guangdong, China |
| Core Material | Low-loss High-purity Oxygen-free Copper H-grade High Temperature Enameled Coil + Galvanized Anti-rust Shell |
| Installation Position | Excavator Hydraulic Main Pump Proportional Valve Core Sleeve Mount |
| Shipment Lead Time | 1–7 working days after payment confirmation |
| Outer Packaging | Neutral Export Carton + Shockproof EPE Foam Inner Liner |
| Series 1 PN | Series 2 PN | Universal Spare Part Numbers |
|---|---|---|
| 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 | 60117464 | 4789321 |
| 20Y-43-41781 | YQ05.251.046 | 4801234 |
| 20Y-43-41800 | 300661-00004A | 212-7890 |
| 708-2H-25053 | 21Q6-20820 | 214-5620 |
| 708-2H-25240 | 702-21-07010 | 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 | 4I-5674 |
| 4I-5674 | 25/974628 | 096-5945 |
| 096-5945 | 4I-5674 | 111-9916 |
| 111-9916 | 096-5945 | 111-9100 |
| 111-9100 | 111-9916 | 56D-15-35220 |
| 56D-15-35220 | 111-9100 | DRE2K-X5-937-16 |
| DRE2K-X5-937-16 | 56D-15-35220 | 116-3526 |
| 116-3526 | DRE2K-X5-937-16 | 121-1490 |
| 121-1490 | 116-3526 | 121-1491 |
| 121-1491 | 121-1490 | 708-2H-25053 |
| 708-2H-25053 | 121-1491 | 708-2H-25240 |
| 708-2H-25240 | 708-2H-25053 | 708-2H-26913 |
| 708-2H-26913 | 708-2H-25240 | 198-4607 |
| 198-4607 | 708-2H-26913 | 195-9700 |
| 195-9700 | 198-4607 | 186-1526 |
| 186-1526 | 195-9700 | 129-1525 |
| 129-1525 | 186-1526 | 154-3685 |
| 154-3685 | 129-1525 | 154-3064 |
| 154-3064 | 154-3685 | 165-4026 |
| 165-4026 | 154-3064 | 125-4653 |
| 125-4653 | 165-4026 | 25222657 |
| 25222657 | 125-4653 | 21W-60-42130 |
| No. | Question | Standard Answer |
|---|---|---|
| Q1 | Which small excavators match 12V main pump proportional solenoid coil 21W-60-42130 21W6042130 with black square plug? | This cylindrical load sensing solenoid coil fits PC78MR-6,PC88MR-6,PC78US-6,PC78UU-6 mini excavator hydraulic main pump regulator system with exclusive black square two-pin waterproof plug. |
| Q2 | What core hydraulic function does this solenoid coil realize? | It generates adjustable electromagnetic force to drive proportional valve spool, adjust variable pump swash plate angle dynamically and match engine power with hydraulic flow to avoid engine stall under heavy load operation. |
| Q3 | What abnormal hydraulic faults will be caused by damaged coil? | Insufficient digging power, unstable main pump pressure, slow bucket and arm movement, intermittent loss of power and continuous abnormal high hydraulic oil temperature. |
| Q4 | Is full disassembly of hydraulic main pump required during replacement? | No, sleeve mounting design, only take out old coil and install new coil on proportional valve core, no need to split pump housing. |
| Q5 | What long-life anti-wear high-temperature resistant design? | H-grade high temperature enameled pure copper winding, galvanized anti-rust shell, double HNBR oil-proof sealing structure and fully sealed waterproof plug, adapt to long-term high temperature and dusty construction environment. |
| Q6 | Are 21W-60-42130 and 21W6042130 interchangeable OEM spare part numbers? | Yes, the two codes correspond to the same complete main pump proportional solenoid coil assembly and can be replaced mutually without modification. |
| Q7 | How to quickly test coil integrity before installation? | Use a multimeter to measure coil resistance, normal range 13.5–14.2 ohms; infinite resistance represents open circuit, resistance below 10 ohms indicates internal short circuit and cannot be installed. |
Company Details
Business Type:
Manufacturer
Total Annual:
5000000-10000000
Employee Number:
50~100
Ecer Certification：
Verified Supplier
Guangzhou Qichao Machinery Co., Ltd. Premier Factory Specializing in R&D & Production of Excavator Electrical Spare Parts Based in Zhuji International Machinery City,Tianhe District,Guanazhou. Our full product lineup covers solenoid valves, sensors, throttle motors, controllers flameout swi... Guangzhou Qichao Machinery Co., Ltd. Premier Factory Specializing in R&D & Production of Excavator Electrical Spare Parts Based in Zhuji International Machinery City,Tianhe District,Guanazhou. Our full product lineup covers solenoid valves, sensors, throttle motors, controllers flameout swi...
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