Liftmaster K13-34745 Limit Nut RSL12V and RSL12VH Slide Gate Operators
The LiftMaster K13-34745 is a limit nut used in the travel limit system of RSL12V and RSL12VH slide gate operators. The limit system tells the operator where the gate should stop at the open and closed positions.
A damaged or worn limit nut can lead to inconsistent stopping, missed limits, over-travel, or trouble setting the gate travel. Because the limit nut works as part of an assembly, the technician should also inspect the limit shaft, limit switch, wiring, and gate travel condition.
This is a small mechanical part, but it directly affects safe and reliable gate movement. After replacement, the operator limits must be reset or verified according to the LiftMaster manual.
Compatible With
Commonly associated with these LiftMaster slide gate operators:
- RSL12V slide gate operator
- RSL12VH slide gate operator
- RSL12V family models where the parts diagram lists K13-34745
Also Known As / Related Part Numbers
- K13-34745
- 13-34745
- LM-K13-34745
- LiftMaster K13-34745
- RSL12V limit nut
- RSL12VH limit nut
- Slide gate limit nut
Features & Specifications
| Manufacturer | LiftMaster |
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| Product Type | Limit nut |
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| Part Number | K13-34745 |
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| Application | Open/close travel limit assembly |
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| Compatible Operator Type | RSL12V and RSL12VH slide gate operators |
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| Notes | Limits must be checked after replacement |
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Technician Note
A limit nut should not be replaced without checking why it failed. Binding, over-travel, damaged limit switches, or incorrect adjustment can damage the new part.
Before Ordering
- Confirm the operator is RSL12V or RSL12VH.
- Match the old limit nut to K13-34745.
- Inspect the limit shaft, switch, wiring, and surrounding hardware.
- Check for gate binding or over-travel damage.
- Reset or verify limits after installation.
Important Ordering Warnings
- Not a limit switch.
- Not for every LiftMaster slide gate operator.
- Incorrect limit setup can cause over-travel or equipment damage.
Professional Advisory
Limit settings affect gate travel and safety. Do not operate the gate repeatedly with missing, damaged, or bypassed limit components.
Product Questions & Answers
What does the K13-34745 limit nut do?
It works with the limit assembly to help define open and close stopping points on compatible RSL12V slide gate operators.
Which operators use K13-34745?
It is commonly listed for LiftMaster RSL12V and RSL12VH slide gate operators.
Is this the same as a limit switch?
No. It is the limit nut. The limit switch, limit shaft, wiring, and control board are separate parts.
What symptoms can point to a worn limit nut?
Over-travel, missed stop points, inconsistent stopping, or damaged limit travel components can point to a worn or damaged limit nut, but the full limit assembly should be inspected.
Should I reset limits after replacement?
Yes. After limit-related parts are replaced, the operator limits should be checked and adjusted according to the LiftMaster manual.
