LiftMaster K76-37667-1 Limit Box Kit for SL585U and SL585UL Operators
The LiftMaster K76-37667-1 limit box kit is a replacement assembly for the travel-limit system on select LiftMaster SL585U and SL585UL industrial slide gate operators. This assembly houses the components that help the operator determine and maintain accurate open and close stopping points. On high-cycle slide gates, worn limit shafts, travel nuts, interrupter components, or damaged box hardware can lead to drifting limits, overtravel, nuisance faults, or failure to complete setup. K76-37667-1 is specifically tied to the SL585 family and should not be confused with the similar K76-37667-2 kit used on different SL-series applications. Before ordering, confirm the operator suffix, horsepower/phase configuration when relevant, and the parts diagram for the exact limit box used in the unit.
Compatible With
This part is intended for the following LiftMaster applications when the model, suffix, and parts diagram confirm the same service part:
- LiftMaster SL585U, SL585UL, SL585103U, SL5855010, and related SL585 series industrial slide gate operators where confirmed by parts diagram.
Common Replacement Reasons
- SL585 gate travel limits drift or become unreliable.
- Limit box components are damaged, worn, or missing.
- Gate stops incorrectly even after normal adjustment.
- Operator has limit-related faults after mechanical service.
Features & Specifications
| Manufacturer | LiftMaster |
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| Product Type | Limit Box Kit |
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| Part Number | K76-37667-1 |
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| Application | Travel limit box assembly replacement |
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| Compatible Operator Type | Industrial slide gate operators |
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| Compatible Models | SL585U, SL585UL, SL585103U, SL5855010, select SL585 series |
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| Included Components | Limit box housing and limit/interrupter components where supplied |
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| Notes | Keep separate from K76-37667-2 and other SL-series limit boxes. |
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Also Known As / Related Part Numbers
The following numbers and search variations are commonly associated with this item or related service references. Verify exact replacement status before substituting any related number.
- K76-37667-1
- 76-37667-1
- K76376671
- SL585U limit box kit
- SL585UL limit box assembly
- Limit Box Assembly
Technician Note
LiftMaster gate operator parts can vary by model generation, voltage, enclosure layout, and internal harness configuration. Match this part to the original component and the operator parts diagram before installation. Similar-looking reset switches, receptacles, limit parts, antennas, and alarm harnesses may not interchange across SL, RSL, RSW, CSW, LA, PPWR, or STAR1000 applications.
Before Ordering
- Confirm the manufacturer part number on the original part or service diagram.
- Check the operator model number and suffix on the equipment label.
- Compare mounting style, connector type, harness routing, voltage rating, and kit contents where applicable.
- For limit parts, confirm whether the operator needs a switch kit, passpoint kit, rack kit, or complete limit box assembly.
- For electrical parts, inspect the cause of failure before replacing the component.
Professional Advisory
Do not bypass monitored safety devices, alarms, interlocks, reset circuits, or factory protection features to keep a gate running. Disconnect power before servicing internal components. For high-voltage wiring, damaged control boxes, heavy slide gates, or operators that move unpredictably, have the system inspected by a qualified gate technician.
Important Ordering Warnings
- Do not rely on the product description alone when the operator has multiple generations or suffixes.
- Do not substitute a similar K76, K74, K23, K70, or K94 part number unless the parts diagram confirms the substitution.
- Limit-system repairs may require travel-limit setup and safety testing after installation.
- Receiver antenna repairs should also include a check of remote compatibility, receiver placement, and interference conditions.
Product Questions and Answers
What model family uses K76-37667-1?
K76-37667-1 is tied to LiftMaster SL585U, SL585UL, SL585103U, SL5855010, and related SL585 series slide gate operators where the parts diagram confirms it.
Is K76-37667-1 the same as K76-37667-2?
No. These are similar limit box kits but are associated with different SL-series applications. Do not swap them without parts-diagram confirmation.
What problems can a failing limit box cause?
A failing limit box can cause inaccurate stopping points, drifting limits, overtravel, setup problems, or limit-related operator faults.
Does this kit include the whole gate operator control board?
No. It is a limit box assembly, not the main control board, motor, gear reducer, or full electrical box.
Should a technician recalibrate the gate after replacement?
Yes. Travel limits and safe operation should be checked after replacing limit components, especially on heavy industrial slide gates.
