510100 US Automatic Patriot Actuator Gearbox Inner Gasket
The US Automatic 510100 is the gearbox inner gasket for select Patriot linear actuator arms. Although it is a simple sealing part, it plays an important role in keeping the actuator drive area protected from the environment. The Patriot actuator operates outdoors and is exposed to rain, humidity, irrigation, dust, insects, and gate vibration. When the gasket is damaged or reused after service, contaminants can enter the internal actuator area and create corrosion, mechanical drag, or premature wear on the drive components. This part is commonly replaced when the actuator is opened for internal service or when there is evidence of moisture inside the housing. It should be matched to the correct Patriot actuator service diagram and not substituted for the 510101 rear cover gasket.
Compatible With
This compatibility list is based on known US Automatic Patriot service-part usage and should be verified against the original operator label, actuator parts diagram, and existing part number before ordering.
- US Automatic Patriot swing gate linear actuator arms
- Patriot heavy-duty swing gate openers using the original US Automatic actuator assembly
- Patriot single swing gate installations where the actuator parts diagram calls for this service part
- Patriot dual swing gate systems when each actuator uses the same matching service component
- Select older Patriot actuator assemblies when confirmed by the original part number and parts diagram
Also Known As / Related Part Numbers
- 510100
- US-510100
- USA 510100
- Patriot actuator gasket
- Patriot gearbox inner gasket
- Patriot gear box inner gasket
- inner gasket for Patriot actuator
- 510101 related rear cover gasket
- 510020 related cover tube
- 510010 related acme screw assembly
Features & Specifications
| Manufacturer | US Automatic |
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| Product Type | Patriot actuator gasket |
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| Part Number | 510100 |
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| Application | Gearbox inner gasket for Patriot actuator |
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| Compatible Operator Type | US Automatic Patriot swing gate linear actuator |
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| Material / Finish | Gasket material; verify by OEM part |
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| Included Components | Gasket only unless listing states otherwise |
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| Notes | Replace when torn, flattened, leaking, or removed during actuator service |
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Technician Note
Do not reuse a damaged or compressed actuator gasket after internal service. A low-cost seal can prevent repeat moisture problems inside the actuator.
Before Ordering Checklist
- Confirm the actuator is a Patriot swing actuator.
- Match the gasket by part number and location in the parts diagram.
- Inspect the mating surfaces for dirt, corrosion, or old gasket residue.
- Check for water intrusion or corrosion inside the actuator before closing it.
- Confirm the cover is seated evenly after gasket replacement.
Professional Advisory
Internal actuator service can affect gate travel, limit adjustment, and safe stopping behavior. Disconnect power before service and have a qualified gate technician handle repairs if the actuator binds, the gate moves unexpectedly, or electrical damage is present.
Product Questions & Answers
Is this gasket a complete actuator repair kit?
No. It is a single gasket service part. Other actuator parts must be ordered separately if needed.
Why should the gasket be replaced?
A worn or damaged gasket can let moisture and debris into the actuator, causing corrosion, binding, or repeat service issues.
Is this the same as the other Patriot actuator gasket?
No. Patriot actuator gaskets are location-specific. Match 510100 and 510101 by the parts diagram and where the gasket is installed.
Should I inspect other parts while replacing it?
Yes. Inspect the cover tube, screw assembly, motor area, wiring, and any signs of water intrusion.
Can a bad gasket cause electrical issues?
It can contribute to moisture intrusion, which may damage wiring, switches, or other internal components over time.
