HySecurity MX3740, Valve, Solenoid, 25 GPM
HySecurity MX3740 is a 25 GPM solenoid valve for select HySecurity HydraWedge SM50 hydraulic wedge operator applications. Nice HySecurity HydraWedge SM50 parts documentation lists MX3740 as "Valve, Solenoid, 25 GPM" for HydraWedge SM50 models.
Current listings describe MX3740 as an EFO solenoid valve. In HydraWedge applications, this valve is part of the hydraulic control circuit and should be matched by part number, hydraulic function, flow rating, coil requirements, porting, wiring, and the HySecurity parts diagram. Because hydraulic solenoid valves can look similar but perform different functions, MX3740 should be selected only after confirming the original valve and system layout.
What This Solenoid Valve Does
A hydraulic solenoid valve uses an electrical coil to shift or control hydraulic flow in the approved circuit. In a compatible HydraWedge SM50 system, MX3740 is used where the hydraulic design calls for a 25 GPM solenoid valve, commonly referenced as an EFO solenoid valve in current listings.
A failed, stuck, contaminated, miswired, wrong-flow, wrong-coil, or leaking solenoid valve can cause no movement, delayed movement, poor emergency operation, weak hydraulic response, pressure problems, overheating, repeated faults, or inconsistent wedge operation. Similar symptoms can also be caused by low hydraulic fluid, contaminated fluid, failed pump pack, weak accumulator, bad pressure switch, relief valve issue, pressure compensated flow valve problem, failed 2P2W solenoid valve, cylinder bypass, hose leaks, damaged fittings, controller output fault, or mechanical binding in the wedge assembly.
Compatible With
Use HySecurity MX3740 only where the operator parts diagram, original valve, or HySecurity documentation confirms this part number.
- Select HySecurity HydraWedge SM50 applications where MX3740 is listed as the 25 GPM solenoid valve.
- HydraWedge SM50 models where the parts diagram lists MX3740 as "Valve, Solenoid, 25 GPM."
- HydraWedge SM50 EFO hydraulic circuits where the parts diagram confirms MX3740 as the required solenoid valve.
- Repairs where the original solenoid valve is marked, listed, or cross-referenced as HySecurity MX3740.
- Applications where the 25 GPM rating, hydraulic function, coil/voltage requirement, wiring or connector style, porting, fittings, and valve location match the HySecurity parts diagram.
Important Compatibility Warning
Do not order MX3740 based only on the words "solenoid valve." HySecurity hydraulic systems use several valves with different functions, including solenoid valves, pressure compensated flow valves, relief valves, pressure switches, check valves, manual bypass valves, pump packs, accumulators, hand pumps, cylinders, reservoirs, hoses, and fittings.
MX3740 is the 25 GPM solenoid valve. It should not be treated as the same part as MX000173, which is a separate 2P2W solenoid valve. It is also not the MX3739-02 pressure compensated 2 GPM flow valve or the MX000174 relief valve. Installing the wrong valve can affect wedge speed, emergency operation, hydraulic pressure, flow direction, heat, cylinder control, and overall system operation.
25 GPM Solenoid Valve vs 2P2W Solenoid Valve Warning
Nice HySecurity HydraWedge SM50 parts documentation lists both MX3740 and MX000173 in the hydraulic valve section. MX3740 is the 25 GPM solenoid valve, while MX000173 is the 2P2W solenoid valve.
Do not substitute one for the other unless the current HySecurity parts diagram, hydraulic schematic, coil requirements, porting, and service instructions specifically confirm the change. These valves may perform different hydraulic functions and are not automatically interchangeable.
Similar Parts That Are Not Automatically Interchangeable
- HySecurity MX000173 - 2P2W solenoid valve; related solenoid valve, not the same as MX3740.
- mx3739-02-pressure-compensated-2-gpm-flow-valve.html">HySecurity MX3739-02 - pressure compensated 2 GPM flow valve; flow valve, not the 25 GPM solenoid valve.
- HySecurity MX000174 - 3000 PSI relief valve; pressure-control valve, not the solenoid valve.
- mx4112-pressure-switch-2200-2500-psi.html">HySecurity MX4112 - pressure switch, 2200-2500 PSI; pressure switch, not the solenoid valve.
- HySecurity MX3954 - 5000 PSI pressure gauge; pressure-reading gauge, not the solenoid valve.
- mx3955-02-1-2-gpm-pump-pack-hydrawedge-sm50.html">HySecurity MX3955-02 - 1.2 GPM HydraWedge pump pack; related pump pack, not the solenoid valve.
- mx3955-05-2-5-gpm-pump-pack-hydrawedge-sm50.html">HySecurity MX3955-05 - 2.5 GPM HydraWedge pump pack; related pump pack, not the solenoid valve.
- mx4054-3000-psi-hand-pump-assembly.html">HySecurity MX4054 - 3000 PSI manual hand pump assembly; related hand pump, not the solenoid valve.
- HySecurity MX3741 - 2.5 gallon bladder accumulator; related accumulator, not the solenoid valve.
- HySecurity MX4759 / MX3964 - HydraWedge hydraulic cylinder references; related hydraulic actuator, not the solenoid valve.
- Generic 25 GPM solenoid valves - not confirmed substitutes unless coil voltage, valve type, porting, fittings, flow direction, pressure rating, hydraulic function, and parts diagram match.
Not Intended For
- 2P2W solenoid valve replacement.
- Pressure compensated flow valve replacement.
- Relief valve replacement.
- Pressure switch or pressure gauge replacement.
- Pump pack or manual hand pump replacement.
- Accumulator or reservoir replacement.
- Hydraulic cylinder replacement.
- Hydraulic hose kit or fitting-only replacement.
- Smart Touch controller board, display board, power supply, circuit breaker, contactor, or control-box part replacement.
- HydraWedge SM50 spring piston hardware, hinge bushings, proximity switches, or LED wedge light replacement.
- Any hydraulic system where the parts diagram does not list MX3740.
Features & Specifications
| Feature / Specification | Details |
| Manufacturer | HySecurity / Nice HySecurity |
| Part Number | MX3740 |
| Product Type | Hydraulic solenoid valve |
| Flow Rating | 25 GPM |
| Common Description | Valve, Solenoid, 25 GPM |
| Additional Listing Description | EFO solenoid valve |
| Common Application | Select HySecurity HydraWedge SM50 hydraulic wedge operator applications |
| Operator Family | HydraWedge SM50 where listed by parts diagram |
| Related Solenoid Valve | MX000173 is the related 2P2W solenoid valve and is not the same part |
| Related Hydraulic Components | Pump pack, hand pump, accumulator, pressure switch, pressure gauge, relief valve, flow valve, hoses, fittings, cylinder, wiring, and fluid condition should be inspected during service |
| Package Contents | Verify before ordering; coil, connector, fittings, adapters, seals, O-rings, mounting hardware, and related hydraulic hardware may be separate unless stated |
Also Known As / Related Part Numbers
- MX3740
- HySecurity MX3740
- Nice HySecurity MX3740
- HYS-MX3740
- HYS-mx3740
- MX3740-5128
- HySecurity solenoid valve
- HySecurity 25 GPM solenoid valve
- HySecurity HydraWedge SM50 solenoid valve
- HySecurity EFO solenoid valve
- Valve, Solenoid, 25 GPM
- EFO solenoid valve, 25 GPM
- 25 GPM hydraulic solenoid valve for HydraWedge SM50
- MX000173 - related 2P2W solenoid valve; not the same part
- MX3739-02 - related pressure compensated 2 GPM flow valve; not the same part
- MX000174 - related 3000 PSI relief valve; not the same part
- MX4112 - related pressure switch; not the same part
- MX3954 - related pressure gauge; not the same part
- MX3955-02 / MX3955-05 - related pump packs; not the same part
- MX4054 - related 3000 PSI hand pump assembly; not the same part
Related Parts and Accessories
The correct related parts depend on the installed HydraWedge SM50 hydraulic circuit and why the solenoid valve is being replaced. Inspect the full hydraulic and electrical control circuit before ordering only MX3740.
- MX000173 2P2W solenoid valve - related solenoid valve, not the same as MX3740.
- MX3739-02 pressure compensated 2 GPM flow valve - related flow valve, not the solenoid valve.
- MX000174 3000 PSI relief valve - related pressure-control valve, not the solenoid valve.
- MX4112 pressure switch, 2200-2500 PSI - related pressure switch, not the solenoid valve.
- MX3954 pressure gauge, 5000 PSI - related pressure gauge, not the solenoid valve.
- MX3955-02 1.2 GPM HydraWedge pump pack and MX3955-05 2.5 GPM HydraWedge pump pack - related pump packs, not the solenoid valve.
- MX4054 3000 PSI hand pump assembly - related manual pump, not the solenoid valve.
- MX3741 bladder accumulator, 2.5 gallon - related accumulator, not the solenoid valve.
- Hydraulic hoses, fittings, adapters, seals, O-rings, wiring connectors, coil hardware, reservoir, fluid, and cylinder components - inspect and verify separately.
Technician Note
Before replacing MX3740, inspect the solenoid coil or connector if applicable, wiring, controller output, valve body, hydraulic fluid level, fluid condition, pump pack output, accumulator condition, pressure switch, relief valve, flow valve, 2P2W solenoid valve, hand pump, hoses, fittings, hydraulic cylinder, and mechanical wedge movement. A no-movement or emergency-operation issue is not always caused by the solenoid valve itself.
If the hydraulic system has contaminated fluid, water intrusion, metal debris, leaking hoses, stuck valves, relief valve bypass, cylinder bypass, weak pump output, wiring faults, or mechanical binding, replacing only the solenoid valve may not correct the issue. Correct the cause of poor hydraulic control before installing the replacement valve.
Before Ordering, Confirm
- The required part number is MX3740.
- The operator is a HySecurity HydraWedge SM50 application where the parts diagram lists MX3740.
- The repair requires the 25 GPM solenoid valve, not the MX000173 2P2W solenoid valve.
- The hydraulic function, EFO function if applicable, 25 GPM rating, coil/voltage requirement, valve porting, flow direction, and circuit location match the original valve and parts diagram.
- The pump pack, accumulator, pressure switch, pressure gauge, relief valve, flow valve, other solenoid valves, hydraulic cylinder, hoses, fittings, wiring, and fluid have been checked for related problems.
- The package includes the expected solenoid valve and any required coil, connector, fittings, adapters, seals, O-rings, or mounting hardware, or those items are ordered separately if needed.
- The hydraulic system has not been modified with non-standard valves, coils, fittings, hoses, pump packs, or hydraulic controls.
Installation and Service Notes
- Disconnect and secure operator power before servicing hydraulic valves or related control wiring.
- Secure the wedge, gate, arm, or moving assembly before opening hydraulic lines or removing valve components.
- Relieve hydraulic pressure according to the manufacturer's service procedure before removing the solenoid valve.
- Keep hydraulic ports, fittings, hose ends, and valve openings clean during service.
- Do not substitute a different GPM valve, coil, valve style, or generic solenoid valve without parts-diagram confirmation.
- Confirm correct flow direction, port connection, fitting tightness, seal condition, wiring connection, and fluid level before startup.
- After installation, check for leaks, correct hydraulic response, proper valve actuation, smooth wedge movement, and correct stopping behavior.
- Verify all required safety devices, access control safety inputs, stop circuits, proximity switches, pressure switches, and controller protections before returning the operator to service.
Professional Advisory
Hydraulic solenoid valve replacement should be handled by a qualified gate technician when the repair involves hydraulic pressure, high-pressure fittings, accumulator circuits, pump output, valve diagnosis, electrical coil testing, controller outputs, hose routing, heavy wedge plates, hydraulic cylinders, fluid contamination, or unknown prior modifications. Do not bypass hydraulic protections, relief valves, pressure switches, solenoid valve circuits, controller protections, proximity switches, limit controls, stop circuits, entrapment protection devices, access control safety inputs, photo eyes, safety edges, or any required safety devices to keep the operator running.
Product Questions & Answers
What is HySecurity MX3740?
HySecurity MX3740 is a 25 GPM hydraulic solenoid valve for select HySecurity HydraWedge SM50 wedge operator applications.
What operator uses MX3740?
Nice HySecurity parts documentation lists MX3740 for HydraWedge SM50 models. Use it only where the operator parts diagram confirms this solenoid valve.
Is MX3740 the same as MX000173?
No. MX3740 is the 25 GPM solenoid valve. MX000173 is the related 2P2W solenoid valve and should not be treated as the same part.
Is MX3740 the same as the MX3739-02 flow valve?
No. MX3740 is a solenoid valve. MX3739-02 is a pressure compensated 2 GPM flow valve and is a separate hydraulic valve.
What does EFO solenoid valve mean for MX3740?
Current listings describe MX3740 as an EFO solenoid valve. Confirm the emergency fast operation hydraulic function and valve location by the HydraWedge SM50 parts diagram before ordering.
Can I use a generic 25 GPM solenoid valve instead of MX3740?
No, not unless the coil voltage, valve type, port style, fittings, flow direction, pressure rating, hydraulic function, and HySecurity parts diagram confirm compatibility.
What should be checked before replacing this solenoid valve?
Check the solenoid coil or connector, wiring, controller output, pump pack, accumulator, pressure switch, pressure gauge, relief valve, flow valve, other solenoid valves, hand pump, hydraulic cylinder, hoses, fittings, fluid condition, mechanical movement, and parts diagram before replacing only MX3740.
