LiftMaster K76-37667-2 Limit Box Kit for SL595U and SL595UL Operators
The LiftMaster K76-37667-2 limit box kit is a service replacement for the travel-limit assembly used on select LiftMaster SL595U and SL595UL industrial slide gate operators. It is designed to restore the operator's ability to control open and close stopping points through the proper limit box components. Because SL585 and SL595 parts can look similar in listings and some supplier references conflict, this part should be verified carefully against the operator model plate and the LiftMaster parts diagram. Installing the wrong limit box can create travel issues, incorrect mounting, or repeated limit setup problems. This kit is best used when the original SL595 limit box is damaged, worn, contaminated, or no longer providing reliable travel-position feedback.
Compatible With
This part is intended for the following LiftMaster applications when the model, suffix, and parts diagram confirm the same service part:
- Strongest references list LiftMaster SL595U and SL595UL. Some supplier text may mention SL585, so verify the exact operator parts diagram before upload or ordering.
Common Replacement Reasons
- SL595 gate overtravels or will not hold limits.
- Limit box has worn shafts, travel nuts, or switch components.
- Operator fails limit setup or limit adjustment does not respond correctly.
- Existing K76-37667-2 assembly is damaged during service.
Features & Specifications
| Manufacturer | LiftMaster |
|---|
| Product Type | Limit Box Kit |
|---|
| Part Number | K76-37667-2 |
|---|
| Application | Travel limit box assembly replacement |
|---|
| Compatible Operator Type | Industrial slide gate operators |
|---|
| Compatible Models | SL595U and SL595UL strongest; conflicting SL585 references require verification |
|---|
| Included Components | Limit box assembly components where supplied |
|---|
| Notes | Verify against original assembly because listings may conflict with SL585 references. |
|---|
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.
- K76-37667-2
- 76-37667-2
- K76376672
- SL595U limit box kit
- SL595UL limit box assembly
- Limit Box Kit
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 models are strongest for K76-37667-2?
The strongest references identify K76-37667-2 for LiftMaster SL595U and SL595UL slide gate operators.
Why do some listings mention SL585?
Some supplier listings conflict or use broad SL-series wording. Because SL585 and SL595 limit boxes can be similar, always confirm the parts diagram and original part number.
Is this a full limit box assembly?
It is sold as a limit box kit or limit box assembly, but exact contents can vary by supplier. Review the kit contents before ordering.
What happens if the wrong limit box is installed?
The gate may not learn limits correctly, may stop at the wrong positions, or the assembly may not mount correctly inside the operator.
Does the gate need to be tested after installation?
Yes. Open and close limits, obstruction response, safety devices, and gate travel should all be tested after any limit box replacement.
