HySecurity MX3688-02, Pump Pack, 4.0 GPM, Biodegradable, M30/M50 NP, 12 - 18 ft
The HySecurity MX3688-02 is a 4.0 GPM biodegradable-fluid pump pack for select HySecurity / Nice HySecurity StrongArm M30 and StrongArm M50 NP no-power barrier arm applications with 12-18 ft clear openings. This pump pack is part of the StrongArm M30/M50 no-power hydraulic panel and should be matched to the exact operator configuration before ordering.
In the no-power system, the pump pack works with the hand crank, gearbox, couplers, manifold assembly, reservoir, check valve, manual bypass valve, flow control valve, relief valve, hoses, fittings, and hydraulic fluid. Because this version is specifically the biodegradable-fluid pump pack, it should not be mixed with standard-fluid pump packs unless the full hydraulic system has been verified for the correct fluid type and service requirements.
What This Pump Pack Does
The MX3688-02 pump pack provides hydraulic pumping capacity for compatible StrongArm M30/M50 NP no-power systems using biodegradable hydraulic fluid. In a properly configured system, it supports manual hydraulic operation through the no-power hand-crank and hydraulic panel arrangement.
The 4.0 GPM flow rate, 12-18 ft clear opening designation, and biodegradable-fluid configuration are all important. Shorter and longer no-power barrier configurations may use different pump pack versions. Using the wrong pump pack can affect manual operation, release behavior, lowering behavior, arm control, or long-term service reliability.
Compatible With
This pump pack may be used with the following applications where the current HySecurity parts diagram confirms MX3688-02:
- Select HySecurity StrongArm M30 NP no-power barrier arm applications with 12-18 ft clear openings
- Select HySecurity StrongArm M50 NP no-power barrier arm applications with 12-18 ft clear openings
- StrongArm M30/M50 no-power hydraulic panel repairs where the parts diagram lists MX3688-02
- Repairs where the original biodegradable pump pack is marked, listed, or cross-referenced as MX3688-02
- Applications using the matching no-power manifold, reservoir, gearbox, hand crank, couplers, hoses, valves, fittings, and biodegradable hydraulic fluid configuration
Important: Do not assume MX3688-02 fits every StrongArm M30/M50 unit. This part is for NP no-power configurations, biodegradable hydraulic fluid systems, and 12-18 ft clear openings. Powered models, longer openings, standard-fluid configurations, and other StrongArm families may use different pump packs.
Similar Parts That Are Not Interchangeable
StrongArm M30/M50 no-power pump packs are configuration-specific. Flow rate, clear opening, fluid type, coupler, pump arrangement, manifold connection, and hydraulic circuit layout all matter.
| Part Number | Common Description | Interchangeability Note |
| MX3688-02 | 4.0 GPM biodegradable pump pack for StrongArm M30/M50 NP, 12-18 ft | Correct where MX3688-02 is listed for the 12-18 ft biodegradable no-power configuration |
| MX3688-01 | 3.1 GPM biodegradable pump pack for StrongArm M30/M50 NP, 20-24 ft | Longer clear-opening biodegradable version; not the same as MX3688-02 |
| MX3687-02 | 4.0 GPM standard-fluid pump pack for StrongArm M30/M50 NP, 12-18 ft | Same clear-opening group, but standard-fluid version; verify fluid type before substituting |
| MX3687-01 | 3.1 GPM standard-fluid pump pack for StrongArm M30/M50 NP, 20-24 ft | Different clear-opening and fluid configuration; not the same part |
| MX3689 | No-power manifold assembly | Related hydraulic manifold, not the pump pack |
Not Intended For
- StrongArm M30/M50 powered models unless the current HySecurity parts diagram specifically lists MX3688-02
- StrongArm M30/M50 NP systems with 20-24 ft clear openings that require the longer-opening biodegradable pump pack
- Standard hydraulic fluid configurations requiring MX3687-series pump packs
- StrongArmPark, StrongArm 36, StrongArm DOT, or other barrier arm systems
- SlideDriver, SlideSmart, SwingSmart, SwingRiser, HydraSwing, HydraWedge, bollard, or wedge applications
- Generic hydraulic pump replacement outside confirmed StrongArm M30/M50 NP applications
- Repairs where the issue is caused by the manifold, valves, reservoir, hand crank, gearbox, couplers, hoses, fittings, fluid contamination, or mechanical arm binding instead of the pump pack
Important Compatibility Warning
The MX3688-02 pump pack is tied to StrongArm M30/M50 NP no-power systems with 12-18 ft clear openings and biodegradable hydraulic fluid. Do not select this pump pack based only on the StrongArm model name. The clear opening, no-power configuration, hydraulic fluid type, pump flow rate, coupler, manifold, reservoir, and hydraulic circuit must match.
Biodegradable hydraulic fluid should not be casually mixed with standard hydraulic fluid. If the system has been serviced before, verify the current fluid type, reservoir condition, and maintenance history before ordering a biodegradable pump pack. Mixing fluid types or installing the wrong pump pack version can create hydraulic performance problems and long-term service issues.
If the no-power system is hard to crank, will not move the arm, lowers incorrectly, leaks, or will not hold position, do not assume the pump pack is the only failed part. Check the no-power manifold, check valve, manual bypass valve, flow control valve, relief valve, reservoir, fluid condition, hand crank, gearbox, couplers, hoses, fittings, and arm mechanics before replacing the pump pack.
Features & Specifications
| Feature / Specification | Details |
| Manufacturer | HySecurity / Nice HySecurity |
| Part Number | MX3688-02 |
| Product Type | Hydraulic pump pack |
| Flow Rate | 4.0 GPM |
| Fluid Configuration | Biodegradable hydraulic fluid configuration |
| Common Description | Pump Pack, 4.0 GPM, Biodegradable, M30/M50 NP, 12-18 ft |
| Common Operator Family | Select HySecurity StrongArm M30/M50 no-power models where specified |
| Clear Opening | 12-18 ft applications where listed by HySecurity |
| System Type | NP / No Power hydraulic panel |
| Included Component Note | Common listings note motor coupler included; confirm current package contents before ordering |
| Hydraulic Considerations | Fluid type, reservoir, manifold, valves, hose routing, fittings, couplers, gearbox, temperature range, and arm mechanics must be verified during service |
Also Known As / Related Part Numbers
- MX3688-02
- MX368802
- MX-3688-02
- HySecurity MX3688-02
- Nice HySecurity MX3688-02
- HYS-MX3688-02
- HYS MX3688-02
- HySecurity Pump Pack, 4.0 GPM, Biodegradable, M30/M50 NP, 12-18 ft
- HySecurity Pump Pack, Biodegradable, StrongArm M30/M50 NP, 12-18 ft
- StrongArm M30/M50 NP 4.0 GPM Biodegradable Pump Pack
- StrongArm No-Power Biodegradable Pump Pack, 12-18 ft
- MX3688-01 - related 20-24 ft biodegradable pump pack, not the same clear-opening configuration
- MX3687-02 - related 12-18 ft standard-fluid pump pack, not the same fluid configuration
- MX3687-01 - related 20-24 ft standard-fluid pump pack, not the same clear-opening or fluid configuration
- MX3689 - related no-power manifold assembly, not the pump pack
- MX3684 - related 3:1 right-angle gearbox, not the pump pack
- MX3691 - related hand crank, not the pump pack
- MX3692 - related keyed coupler, not the pump pack
Related Parts and Accessories
- MX3689 no-power manifold assembly where hydraulic control or release behavior is the issue
- MX3684 3:1 right-angle bevel gearbox for the no-power hand-crank drive path
- MX3691 10 inch L square drive hand crank for no-power operation
- MX3692 5/8 x 5/8 inch keyed coupler for the NP hydraulic panel
- MX002054 motor coupler where used in the no-power drive arrangement
- MX000161 4-quart reservoir where the reservoir is damaged or contaminated
- MX000352 check valve, MX001255 manual bypass valve, MX001258 flow control valve, and MX000174 relief valve where listed separately in the parts diagram
- Hydraulic hoses, fittings, seals, and biodegradable hydraulic fluid matched to the StrongArm M30/M50 NP system
Technician Note
Before replacing the MX3688-02 pump pack, inspect the complete StrongArm M30/M50 no-power hydraulic panel. A hard-to-crank system, slow arm movement, no movement, poor hold position, leakage, or inconsistent lowering may be caused by valve problems, contaminated fluid, air in the hydraulic circuit, hose restrictions, reservoir issues, coupler damage, gearbox resistance, hand-crank problems, or mechanical arm binding.
Clear opening and fluid type both matter. This pump pack is listed for 12-18 ft no-power applications using biodegradable hydraulic fluid. If the arm is a longer 20-24 ft configuration, or if the operator uses standard hydraulic fluid, the correct pump pack may be different.
Before Ordering, Confirm
- The original or required part number is MX3688-02.
- The operator is a HySecurity StrongArm M30 NP or StrongArm M50 NP no-power model.
- The clear opening is 12-18 ft.
- The hydraulic system uses the biodegradable MX3688-series pump pack, not the standard-fluid MX3687-series version.
- The current HySecurity parts diagram lists MX3688-02 for the pump pack position.
- The motor coupler, gearbox, hand crank, manifold, reservoir, hoses, fittings, and valves match the original NP configuration.
- The issue is not caused by the manifold, check valve, manual bypass valve, flow control valve, relief valve, hose restriction, contaminated fluid, low fluid, air in the system, gearbox, coupler, or arm binding.
- The package contents include the motor coupler and any hardware needed for the repair, or related parts are being ordered separately.
- The system has not been modified with non-original hydraulic components, hose routing, or no-power drive hardware.
Installation and Service Notes
- Disconnect power where applicable and follow proper lockout procedures before servicing the barrier operator.
- Relieve hydraulic pressure according to the operator service procedure before removing hoses, pump pack components, or valve assemblies.
- Mark all hydraulic hoses and ports before disassembly to prevent crossed lines during installation.
- Cap or protect open hydraulic ports and hoses to keep dirt, water, and debris out of the system.
- Use only the correct fittings, seals, couplers, and biodegradable hydraulic fluid for the StrongArm M30/M50 NP hydraulic circuit.
- Do not mix fluid types unless the system has been properly serviced and verified for the intended hydraulic fluid.
- Do not adjust or defeat relief valves, bypass valves, flow controls, or pressure controls without following HySecurity service procedures.
- After installation, check for leaks, smooth hand-crank operation, controlled no-power release, arm lowering behavior, and proper hold position.
- Test all required safety devices, vehicle detection, access-control inputs, and operator protections before returning the barrier to service.
Professional Advisory
The MX3688-02 is a hydraulic pump pack used in a StrongArm M30/M50 no-power barrier system. Service should be performed by a qualified gate technician when the repair involves hydraulic pressure, pump pack replacement, manual release behavior, gravity lowering, valve diagnosis, flow control adjustment, heavy barrier arm movement, hydraulic fluid changeover, or unknown prior modifications.
Do not bypass hydraulic controls, relief valves, manual bypass valves, flow controls, vehicle detection, controller protections, safety devices, disconnects, or barrier safeguards to keep the system operating. If the barrier arm lowers unpredictably, will not hold position, binds, leaks, or cannot be controlled safely, the system should be inspected before continued use.
Product Questions & Answers
What is the HySecurity MX3688-02?
The HySecurity MX3688-02 is a 4.0 GPM biodegradable pump pack used on select StrongArm M30/M50 NP no-power barrier arm applications with 12-18 ft clear openings.
What does NP mean on MX3688-02?
NP means No Power. In this application, it refers to the StrongArm M30/M50 no-power hydraulic panel used for manual hydraulic operation without normal electrical power.
Does MX3688-02 fit both StrongArm M30 NP and M50 NP?
Yes, MX3688-02 is listed for StrongArm M30/M50 no-power models where the clear opening is 12-18 ft, the system uses the biodegradable-fluid configuration, and the current parts diagram confirms this pump pack.
Is MX3688-02 the same as MX3687-02?
No. MX3688-02 is the biodegradable-fluid pump pack for 12-18 ft no-power applications. MX3687-02 is the related standard-fluid pump pack for 12-18 ft applications.
Is MX3688-02 the same as MX3688-01?
No. MX3688-02 is for 12-18 ft no-power applications. MX3688-01 is the related biodegradable pump pack for 20-24 ft no-power applications.
Does MX3688-02 include a motor coupler?
Common listings note that MX3688-02 includes a motor coupler. Package contents should still be confirmed before ordering, especially if couplers, fittings, seals, or mounting hardware are needed.
Should a technician install the MX3688-02 pump pack?
Yes. This repair involves hydraulic pressure, no-power release behavior, pump pack service, biodegradable hydraulic fluid, and heavy barrier arm movement, so it should be handled by a qualified gate technician.
