Linear Pro Access R4671 Replacement Keypad for FM145 Bulldog Pedestrian Gate Lock
The R4671 is the replacement keypad used with the FM145 Bulldog pedestrian gate lock family. The Bulldog system is a dedicated walk-through gate lock, not a swing gate opener arm and not a full telephone entry system. The keypad provides code-based entry for authorized users on pedestrian gates, pool gates, playground gates, marina or dock gates, tennis court gates, and similar access points. It is commonly used when the existing keypad housing is damaged, the buttons no longer respond reliably, or the keypad has weather-related wear but the lock assembly and control box are still usable. Correct identification is important because Linear, GTO, and Mighty Mule have several different keypad products that look similar in search results but serve very different systems.
Compatible With
Compatible Product Family
- FM145 Bulldog pedestrian gate lock
- Mighty Mule FM145 pedestrian gate lock
- GTO/Linear Pro Access FM145 Bulldog gate latch kit
- Bulldog walk-through gate lock systems using the R4671 keypad
Common Applications
- Pool gate and pedestrian walkway access control
- Playground, tennis court, boat dock, marina, and private pedestrian gate locks
- Horizontal-mount walk-through gate lock applications where the original Bulldog keypad is being replaced
Not Intended For
- Standard driveway gate opener receiver/keypad replacement
- F310, F3100MBC, F6110MBC, or AE-100 access control systems
- Remote transmitter activation; the FM145 manual notes transmitters are not compatible with this product family
Features and Specifications
| Manufacturer | Linear Pro Access / GTO / Mighty Mule |
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| Product Type | Replacement keypad |
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| Part Number | R4671 |
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| Compatible Lock Model | FM145 Bulldog pedestrian gate lock |
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| Application | Pedestrian and walk-through gate lock access |
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| Material / Finish | Steel keypad housing commonly listed for this replacement |
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| Battery Type | Keypad battery requirements depend on FM145 configuration; many FM145 keypad references use AA batteries |
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| Notes | Keypad service part only; not the complete lock kit |
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Also Known As / Related Part Numbers
- R4671
- LIN-R4671
- GTO R4671
- Mighty Mule R4671
- FM145 keypad
- Bulldog replacement keypad
- Bulldog pedestrian gate lock keypad
- R4604 related Bulldog keypad/controller reference - verify before substituting
Technician Note
This is a Bulldog FM145 service keypad. If the lock will not release, inspect batteries, wiring, control box, receiver alignment, and gate sag before replacing only the keypad.
Before Ordering
- Confirm the existing lock is an FM145 Bulldog pedestrian gate lock.
- Inspect the keypad housing, battery compartment, and wiring condition.
- Check that the gate and lock receiver line up without binding.
- Confirm the customer needs a keypad only, not the complete FM145 lock kit.
- Do not substitute this for F310, F6110MBC, or AE telephone entry equipment.
Professional Advisory
Pedestrian gate locks used around pools and access-controlled areas should be repaired so they latch and release reliably. Do not leave a security or pool gate unsecured because a keypad has failed.
Questions and Answers
What product does the R4671 keypad fit?
The R4671 replacement keypad is designed for the FM145 Bulldog pedestrian gate lock family.
Is the R4671 for a driveway gate operator?
No. It is for the Bulldog pedestrian or walk-through gate lock, not for a standard driveway gate opener arm.
Does this keypad include the complete FM145 lock?
No. This product is the replacement keypad portion. The complete FM145 kit includes the lock assembly and related controls.
Can a transmitter be used instead of this keypad?
The FM145 manual notes that transmitters are not compatible with that product family. Use normally open entry controls that are supported by the lock system.
What should be checked before replacing the keypad?
Check the keypad batteries, wiring, control box, lock alignment, and gate hardware before replacing the keypad alone.
