Mighty Mule R4690 Loaded Control Box with R4211 Board for FM502 Operators
The R4690 loaded control box is the assembled control enclosure used to restore compatible Mighty Mule FM502 control box systems when more than just a bare board is needed. A loaded box is especially useful after lightning damage, water intrusion, broken enclosure hardware, corroded internal connections, damaged battery harnesses, failed receiver components, or missing control box hardware. Instead of replacing only the circuit board, this assembly provides the key control-box components in one package. For an FM502 dual swing gate system, correct control box selection matters because the controller must support the master and secondary arm setup, the correct receiver style, battery harness, alarm buzzer, and switch layout.
R4690 should not be treated as a universal enclosure for every Mighty Mule operator. The included R4211 control board family has its own compatibility range, but the loaded control box assembly also depends on the physical box and installed accessories. Use the FM502 row when replacing the box on a dual FM502 system.
Compatible With
This R4690 loaded control box is commonly associated with these applications and related control-board families:
- Mighty Mule FM502 dual swing gate operator loaded control box replacement
- Mighty Mule FM502 systems using the R4211 control board family
- Related FM500 / FM502 control system service references when the loaded box configuration matches
- R4211 board family compatibility references: FM500, FM502, MM560, MM562, MM600, and MM660
- Related GTO / Linear Pro 2500 series references where R4690 loaded boxes are listed
- Select PRO-SW2500 / PRO-SW2502 and related GTO/Linear Pro references only when enclosure and wiring configuration are confirmed
Features & Specifications
| Manufacturer | Linear / Mighty Mule / GTO |
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| Product Type | Loaded control box assembly |
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| Part Number | R4690 |
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| Application | Replacement loaded control box for compatible FM502 control systems |
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| Compatible Operator Type | Select battery-backed swing gate opener control systems |
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| Included Components | Control board, receiver, battery harness, alarm, on/off switch, strain relief, PCB standoffs, and cover screws as commonly listed |
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| Related Board | R4211 control board family |
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| Notes | Match single/dual gate configuration and enclosure layout |
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Also Known As / Related Part Numbers
Related numbers and common search references include:
- R4690
- LIN-R4690
- GTO R4690
- Mighty Mule R4690
- FM502 R4690 loaded control box
- R4690 loaded box
- Loaded control box with R4211 board
- R4211 control board
- FM502 loaded control box
- Mighty Mule FM502 control box
- Related to FM500 R4690 but must match configuration
Technician Note
When replacing a loaded control box, transfer wiring carefully and label each accessory lead before removal. Replacing the box will not correct a binding gate, bad arm, weak battery, or failed transformer by itself.
Before Ordering
- Confirm the operator is an FM502 dual swing gate system.
- Compare the existing enclosure, battery harness, receiver, and switch layout.
- Confirm the system uses the R4211 board family.
- Inspect both actuator arms and secondary-arm cable before condemning the control box.
- Plan to reprogram remotes and test safety functions after service.
Important Ordering Warnings
Do not order by R4211 board compatibility alone. A loaded control box also has enclosure, receiver, harness, switch, and single/dual gate configuration considerations.
Professional Advisory
Gate opener service can involve stored gate force, moving arms, batteries, and low-voltage control wiring. If the operator is moving unexpectedly, has damaged wiring, or has missing required safety devices, have the system inspected by a qualified gate technician before returning it to service.
Product-Specific Q&A
What is included with an R4690 loaded control box?
Common listings include the control board, receiver, battery harness, alarm, on/off switch, strain relief, PCB standoffs, and cover screws.
Is this R4690 row for the FM502 operator?
Yes. This product content is written for FM502 loaded control box service.
Is the R4211 board related to this loaded box?
Yes. R4690 loaded control box listings are commonly associated with the R4211 control board family.
Can this fix a gate that only runs one leaf?
It may if the control box is the fault, but secondary arm wiring, the arm motor, limit/rev counter components, and mechanical binding should be checked first.
Will remotes need to be programmed after replacement?
Typically yes. Receiver and board replacement work may require remote programming and full system testing after installation.
