GTO Gear Motor (SL2000B/ 2200B / GPX-SL25)
The RB205B is the replacement gear motor assembly with brake used in select GTO, Linear PRO and Mighty Mule DC slide gate operators. The gear motor supplies the drive force that turns the operator sprocket and moves the gate through the chain drive system. The brake helps control gate movement and assists with holding position when the operator stops. When this assembly fails, the opener may hum without moving, move weakly, stop under load, freewheel, lose brake holding, or show inconsistent travel even when the battery and control board are good.
This part is most commonly tied to the SL2000B, SL2200B and GPX-SL25 slide gate operator families. Those operators use a low-voltage DC drive system and rely on the motor, gear reduction, brake, limit system and control board working together. Replacing the motor without checking the gate and drive train can lead to a repeat failure. A dragging gate, damaged rollers, tight chain, worn idler wheels, failing battery, blown fuses, or misadjusted limits can all make a good motor appear weak.
Use this part when the original motor/brake assembly has been identified as failed by testing or by comparison to the operator parts diagram. Before replacing, inspect the chain path, gate rollers, limit nuts and battery condition. If the old motor failed after a storm, power surge or water intrusion, the control board and wiring should also be checked.
Compatible With
The RB205B is a model-specific gear motor with brake commonly listed for these slide gate operator applications:
- GTO / Linear PRO SL2000B slide gate operator
- GTO / Linear PRO SL2200B slide gate operator
- GTO / Linear PRO GPX-SL25 slide gate operator
- Mighty Mule SL2000B series slide gate operator
- Mighty Mule SL2200B series slide gate operator
- Select GTO PRO residential slide gate operators using the RB205B motor/brake assembly
- Not a universal replacement for all SL1000, SL1500, AC slide, hydraulic, or commercial slide gate motors
Features & Specifications
| Manufacturer | GTO / Linear PRO / Mighty Mule family |
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| Product Type | Gear motor with brake |
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| Part Number | RB205B |
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| Application | Slide gate operator drive motor replacement |
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| Compatible Operator Type | Select DC chain-drive slide gate openers |
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| Voltage | Operator-specific low-voltage DC motor assembly; verify by model |
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| Included Components | Gear motor assembly with brake where supplied by manufacturer |
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| Notes | Match original motor assembly, connector style and operator parts diagram |
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Also Known As / Related Part Numbers
- RB205B
- LIN-RB205B
- GTO RB205B
- Linear RB205B
- Mighty Mule RB205B
- SL2000B gear motor
- SL2200B gear motor
- GPX-SL25 gear motor
- gear motor with brake
Technician Note
A weak or stalled slide gate opener is not always a bad motor. Always roll the gate by hand with the chain disconnected, inspect the rollers and track, and confirm the battery and charging system before condemning the RB205B.
Before Ordering Checklist
- Confirm the slide operator model is SL2000B, SL2200B or GPX-SL25.
- Compare the original motor/brake assembly and part number to RB205B.
- Check that the gate rolls freely and the chain is not over-tightened.
- Inspect battery voltage, fuses, limit nuts, sprockets and wiring before replacement.
- Do not use this part for unrelated AC slide operators or different motor assemblies.
Important Ordering Warnings
Similar GTO and Mighty Mule slide gate operators can use different motor assemblies. Match the original motor and parts diagram before ordering.
Professional Advisory
Motor replacement requires safe handling of moving gate parts and electrical components. If the operator has high current draw, damaged wiring, water intrusion or storm damage, use a qualified gate technician.
Product Questions & Answers
Which operators commonly use the RB205B gear motor?
The RB205B is commonly used with GTO/Linear PRO SL2000B, SL2200B and GPX-SL25 slide gate operators, along with matching Mighty Mule SL2000B and SL2200B series applications.
Does the RB205B include the brake?
The RB205B is normally described as a gear motor with brake. Compare the replacement assembly to the original motor/brake unit before installation.
What symptoms can point to a failed gear motor?
Possible symptoms include humming without gate movement, weak travel, motor stalling under load, brake not holding, or the operator failing after the gate and battery have been checked.
Should I replace the motor if the gate is hard to push?
No. A slide gate that is hard to move by hand should be repaired first. Bad rollers, track problems, chain drag or a tight drive system can damage a new motor.
Is RB205B interchangeable with all GTO slide gate motors?
No. It is a specific motor/brake assembly for selected DC slide gate models. Always verify the operator model and original part number.
