HySecurity MX000077, CYLINDER ASSEMBLY, 2" X 6", SA
HySecurity MX000077 is a 2 inch x 6 inch hydraulic cylinder assembly for select HySecurity StrongArm barrier gate operator applications. Current listings identify MX000077 as a cylinder kit for StrongArm, and the part description is commonly shown as "Cylinder Assembly, 2 inch x 6 inch, SA."
This cylinder assembly is part of the StrongArm hydraulic drive system. Because hydraulic cylinder fitment depends on bore size, stroke, mounting points, pin hardware, hose connections, and operator configuration, MX000077 should be selected only after confirming the operator model, serial number, original cylinder, and HySecurity parts diagram.
What This Cylinder Assembly Does
The cylinder assembly provides hydraulic movement for the StrongArm barrier arm system. Hydraulic pressure moves the cylinder rod, and that motion transfers through the crankshaft and arm-drive hardware to raise or lower the barrier arm.
A worn, leaking, bent, internally bypassing, or incorrectly installed cylinder can cause weak arm movement, drifting, poor hold position, oil leakage, slow movement, uneven travel, or failure to move the arm under load. Similar symptoms can also be caused by worn cylinder pins, loose crankshaft hardware, hydraulic hose leaks, bad fittings, low fluid, pump pack issues, brake valve problems, incorrect arm balance, binding arm hardware, or a damaged crankshaft bearing.
Compatible With
Use HySecurity MX000077 only where the operator parts diagram, original cylinder assembly, or HySecurity documentation confirms this part number.
- Select HySecurity StrongArm barrier gate operator applications where MX000077 is listed as the 2 inch x 6 inch cylinder assembly.
- StrongArm hydraulic drive repairs where the original cylinder is marked, listed, or cross-referenced as HySecurity MX000077.
- Applications where the cylinder bore, stroke, mounting points, rod end, pin hardware, and hose connections match the HySecurity parts diagram.
- Repairs where diagnosis confirms the hydraulic cylinder assembly is leaking, bypassing internally, bent, or no longer serviceable.
Important Compatibility Warning
Do not order MX000077 based only on the word "cylinder." HySecurity uses different cylinders, cylinder pins, hydraulic parts, and drive components across StrongArm, StrongArm M30/M50, SwingRiser, HydraSwing, HydraLift, HydraWedge, and other hydraulic operator families.
MX000077 is listed as a StrongArm cylinder kit / cylinder assembly. It should not be confused with cylinder pins, crankshaft parts, brake valves, pump packs, manifolds, hose kits, or position-sensing cylinders used in other StrongArm-related product families.
Similar Parts That Are Not Automatically Interchangeable
- mx000312-stainless-steel-cylinder-pin-strongarm.html">HySecurity MX000312 - stainless steel cylinder pin for StrongArm references; related linkage hardware, not the cylinder assembly.
- mx001100-crankshaft-bearing-zerk-keys-strongarm.html">HySecurity MX001100 - crankshaft with bearing, zerk and keys; related arm-drive component, not the cylinder assembly.
- HySecurity MX000306 - 4-bolt crankshaft bearing; not the same as the cylinder assembly.
- mx000299-1-25-inch-limit-cam-strongarm.html">HySecurity MX000299 - limit cam; related travel/limit component, not the cylinder assembly.
- HySecurity MX001000 - hose kit references for StrongArm; not the same as the cylinder assembly.
- mx000657-3-1-counterbalance-brake-valve.html">HySecurity MX000657 - brake valve used in some StrongArm references; not the same as this cylinder assembly.
- HySecurity MX002605 - position sensing cylinder assembly for StrongArm M30/M50 references; not the same as MX000077.
- Hydraulic pump packs, fittings, manifolds, and valves - related hydraulic components but not interchangeable with the cylinder assembly.
Not Intended For
- StrongArm M30/M50 applications unless the parts diagram specifically lists MX000077.
- SwingRiser, HydraSwing, HydraLift, HydraWedge, SlideDriver, SlideSmart, SwingSmart, or WedgeSmart operators unless the parts diagram specifically lists MX000077.
- Cylinder pin replacement.
- Crankshaft, crank bearing, or limit cam replacement.
- Hydraulic hose kit replacement.
- Hydraulic pump pack, manifold, or valve replacement.
- Side-mount arm bracket, yoke bracket, counterweight, or complete barrier arm replacement.
- Repairs where the actual issue is low fluid, hose leakage, pump failure, arm binding, or incorrect counterweight balance.
Features & Specifications
| Feature / Specification | Details |
| Manufacturer | HySecurity / Nice HySecurity |
| Part Number | MX000077 |
| Product Type | Hydraulic cylinder assembly / cylinder kit |
| Cylinder Size | 2 inch x 6 inch, based on provided part description |
| Common Description | Cylinder Assembly, 2 inch x 6 inch, SA |
| Common Application | Select HySecurity StrongArm barrier gate operator applications |
| Operator Family | StrongArm / SA where listed by parts diagram |
| Hydraulic Function | Provides hydraulic motion for the StrongArm arm-drive mechanism |
| Related Hardware | Cylinder pins, hoses, fittings, crankshaft hardware, and arm hardware may be separate unless stated |
| Package Contents | Verify current package contents before ordering; pins, fittings, hoses, seals, and hardware may be separate unless included by the current kit |
Also Known As / Related Part Numbers
- MX000077
- HySecurity MX000077
- Nice HySecurity MX000077
- HYS-MX000077
- HYS-mx000077
- HySecurity cylinder assembly, 2 inch x 6 inch, SA
- HySecurity 2 inch x 6 inch cylinder assembly
- HySecurity StrongArm cylinder kit
- HySecurity StrongArm hydraulic cylinder assembly
- Cylinder Kit for StrongArm
- Cylinder Assembly for StrongArm SA
- MX000312 - related cylinder pin; not the same part
- MX001100 - related crankshaft assembly; not the same part
- MX000306 - related crankshaft bearing; not the same part
- MX000299 - related limit cam; not the same part
- MX002605 - related position sensing cylinder for StrongArm M30/M50 references; not the same part
Related Parts and Accessories
The correct related parts depend on the installed StrongArm model, cylinder mounting arrangement, hose routing, and cause of the original failure. Inspect the full hydraulic and arm-drive area before ordering only the cylinder assembly.
- MX000312 cylinder pin - related linkage hardware, not the cylinder assembly.
- MX001100 crankshaft with bearing, zerk and keys - related arm-drive part, not the cylinder assembly.
- MX000306 4-bolt crankshaft bearing - related bearing support part, not the cylinder assembly.
- MX000299 limit cam - related travel/limit component near the crankshaft area.
- Hydraulic hose kit and fittings - inspect for leaks, restrictions, and damage during cylinder replacement.
- Hydraulic pump pack and brake valve components - inspect if the cylinder movement is weak, drifting, or inconsistent.
- Arm yoke, counterweight, and mounting hardware - inspect if the arm is binding, sagging, or out of balance.
Technician Note
Before replacing MX000077, confirm whether the cylinder is leaking externally, bypassing internally, bent, or damaged at the rod, barrel, clevis, or mounting area. A weak or drifting arm is not always caused by the cylinder. Hose leaks, worn pins, damaged fittings, pump issues, brake valve problems, low fluid, crankshaft wear, or poor arm balance can create similar symptoms.
If the cylinder failed after an arm strike or heavy impact, inspect the cylinder pins, crankshaft, yoke, arm brackets, counterweights, and mounting points. Replacing the cylinder without correcting bent linkage or binding arm hardware can damage the replacement cylinder.
Before Ordering, Confirm
- The required part number is MX000077.
- The operator is a HySecurity StrongArm / SA application where the parts diagram lists MX000077.
- The cylinder size required is 2 inch x 6 inch.
- The cylinder mounting points, rod end, pin hardware, and hose connections match the original installation.
- The repair requires the cylinder assembly, not only a cylinder pin, hose kit, valve, pump pack, crankshaft, or arm bracket.
- The hydraulic issue is not caused by low fluid, leaking hoses, damaged fittings, pump problems, brake valve issues, arm binding, or incorrect counterweight balance.
- The package includes the expected cylinder assembly and any required hardware, or that pins, fittings, hoses, and seals are ordered separately.
- The operator has not been modified with a non-standard cylinder or linkage arrangement.
Installation and Service Notes
- Secure the barrier arm before servicing hydraulic cylinder or linkage hardware.
- Do not work under an unsupported arm or counterweight-loaded arm assembly.
- Relieve hydraulic load according to the manufacturer's service procedure before disconnecting cylinder hoses or fittings.
- Keep hydraulic fittings and hose ends clean during service to avoid contaminating the hydraulic system.
- Inspect cylinder pins, retaining hardware, hose routing, fittings, and crankshaft linkage during replacement.
- Do not force a cylinder into misaligned linkage or damaged mounting points.
- After service, check for leaks, smooth arm travel, correct hold behavior, proper limit operation, secure hardware, and all required safety devices.
Professional Advisory
StrongArm hydraulic cylinder replacement should be handled by a qualified gate technician when the repair involves hydraulic pressure, heavy barrier arms, counterweights, cylinder linkage, hose fittings, arm balance, brake valve diagnosis, or unknown prior modifications. Do not bypass limit controls, stop circuits, kill switches, hydraulic protections, controller protections, access control safety inputs, or any required safety devices to keep the operator running.
Product Questions & Answers
What is HySecurity MX000077?
HySecurity MX000077 is a 2 inch x 6 inch hydraulic cylinder assembly for select HySecurity StrongArm barrier gate operator applications.
What operators use MX000077?
MX000077 is commonly associated with HySecurity StrongArm / SA applications. Use it only where the operator parts diagram confirms this exact cylinder assembly.
Is MX000077 the same as a cylinder pin?
No. MX000077 is the cylinder assembly. Cylinder pins and retaining hardware are separate related parts unless the current package specifically includes them.
Can a bad cylinder cause the StrongArm barrier arm to drift?
Yes. A leaking or internally bypassing cylinder can contribute to drifting or poor holding, but similar symptoms can also come from hose leaks, valve problems, low fluid, pump issues, worn pins, or incorrect arm balance.
Is MX000077 the same as the StrongArm M30/M50 position sensing cylinder?
No. MX000077 should not be assumed to replace the position sensing cylinder used in StrongArm M30/M50 references. Verify the exact part number by the operator parts diagram.
What should be checked before replacing this cylinder assembly?
Check the cylinder rod, barrel, seals, pins, fittings, hoses, pump pack, brake valve, crankshaft hardware, yoke, counterweights, and arm balance before replacing only the cylinder.
Should a technician replace this hydraulic cylinder?
Yes. A qualified gate technician is recommended because this repair can involve hydraulic pressure, heavy barrier arms, cylinder linkage, hose fittings, arm balance, and safety-critical operator operation.
