LiftMaster K75-19101 Lower Pivot Arm Kit for Gate Operator Linkage Service
The K75-19101 is a lower pivot arm replacement kit for select LiftMaster gate operator linkage assemblies. The lower pivot arm sits in the motion-transfer area of the operator and helps maintain proper geometry between the drive assembly and gate linkage. When this arm wears or bends, the operator may still run, but the linkage can start loading unevenly, making the gate harder to move and increasing wear on the mating arm, tension rod, and pivot hardware.
Available listings describe this part for various LiftMaster gate operators and perimeter access solutions, while related schematic references place it in the same HS670-style linkage group as the upper pivot arm and tension rod. Because model-by-model documentation is limited, this product page uses cautious fitment language and recommends verifying the exact part callout before ordering.
Compatible With
Use this kit only where the LiftMaster illustrated parts list or service breakdown identifies K75-19101 as the lower pivot arm kit.
- Select LiftMaster gate operators and perimeter access systems that list K75-19101
- Commonly associated with HS670GL-style linkage service diagrams
- LiftMaster hydraulic slide gate linkage assemblies using the matching lower pivot arm geometry
- Not interchangeable with K75-19100 upper pivot arm or tension rod parts
Features and Specifications
| Manufacturer | LiftMaster |
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| Product Type | Lower pivot arm kit |
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| Part Number | K75-19101 |
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| Application | Gate operator mechanical linkage repair |
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| Compatible Operator Type | Select LiftMaster commercial gate operators |
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| Material / Finish | Heavy-duty metal service component |
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| Notes | Verify by model-specific parts diagram |
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Also Known As / Related Part Numbers
- K75-19101
- 75-19101
- LM-K75-19101
- Lower Pivot Arm Kit
- HS670 lower pivot arm reference
Technician Note
If the lower pivot arm is worn, there is usually a reason. Check for loose mounting hardware, seized pivot points, bent gate hardware, poor gate balance, or a failed companion linkage part before installing the replacement.
Before Ordering
- Verify K75-19101 in the operator parts diagram
- Compare the old lower arm to the replacement before installation
- Inspect the upper pivot arm and tension rod at the same time
- Confirm the operator is not binding due to gate hardware or roller problems
- Do not order based only on a visual match from another operator family
Professional Advisory
Mechanical linkage repairs should be tested with the gate disconnected from automatic force where applicable and with all safety devices working. Heavy commercial gate hardware can shift suddenly if binding parts are removed without support.
Important Ordering Warning
Documentation for this part is broader than some model-specific listings. Use parts-diagram confirmation for the final fitment decision.
Product Questions and Answers
What is the K75-19101 lower pivot arm kit used for?
It is used to replace the lower pivot arm in select LiftMaster gate operator linkage assemblies.
Is K75-19101 confirmed for every LiftMaster gate operator?
No. Listings describe it for various LiftMaster gate operators, so the exact operator parts diagram should be used for confirmation.
Can I replace only the lower pivot arm?
Yes, if the rest of the linkage is in good condition, but the upper arm, tension rod, spring, and pivot hardware should be inspected.
Is this the same part as K75-19100?
No. K75-19100 is the upper pivot arm kit, while K75-19101 is the lower pivot arm kit.
What symptoms can point to a worn lower pivot arm?
Binding linkage, uneven gate movement, worn pivot holes, bent arm geometry, or repeated hardware loosening can indicate a lower pivot arm problem.
