LiftMaster K75-19100 Upper Pivot Arm Kit for HS670GL Gate Operators
The K75-19100 is the upper pivot arm kit used in the mechanical linkage area of supported LiftMaster HS670GL hydraulic slide gate operators. In this style of operator, the pivot arms and tension hardware help transfer drive force while keeping the linkage in the correct operating position. If the upper pivot arm is worn or distorted, the gate can move unevenly, the linkage can bind, and related tension components may wear faster.
This is not a cosmetic bracket. It is a load-bearing linkage part that should match the operator horsepower and parts breakdown. For older HS670GL units, the upper pivot arm should be checked together with the lower pivot arm kit K75-19101 and the proper tension rod, especially when the gate has been run with a bent arm or loose hardware.
Compatible With
The strongest supported application is the LiftMaster HS670GL hydraulic slide gate operator platform.
- LiftMaster HS670GL hydraulic slide gate operators
- HS670GL linkage assemblies where K75-19100 is shown as the upper pivot arm kit
- Commercial / industrial hydraulic slide gate operators only when the official LiftMaster parts diagram lists K75-19100
Features and Specifications
| Manufacturer | LiftMaster |
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| Product Type | Upper pivot arm kit |
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| Part Number | K75-19100 |
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| Application | Mechanical linkage and pivot arm service |
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| Compatible Operator Type | HS670GL hydraulic slide gate operator |
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| Material / Finish | Heavy-duty metal service component |
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| Notes | Works with lower pivot arm and tension rod hardware in the linkage assembly |
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Also Known As / Related Part Numbers
- K75-19100
- 75-19100
- LM-K75-19100
- Upper Pivot Arm Kit
- HS670GL upper pivot arm
Technician Note
When replacing a pivot arm, inspect the mating pivot points, rod ends, tension rod, spring, and mounting hardware. A new arm installed into worn linkage hardware may not correct binding or alignment problems.
Before Ordering
- Confirm the operator model is HS670GL or that the parts diagram lists K75-19100
- Compare the old arm shape and mounting points to the replacement kit
- Inspect K75-19101 lower pivot arm and K75-19103 / K75-19102 tension rod applications if the linkage is worn
- Check for bent gates, binding rollers, or mechanical drag before blaming the arm only
- Do not substitute a pivot arm from another horsepower or operator family
Professional Advisory
Hydraulic slide gate linkage parts operate under load. If the arm failed because the gate is dragging, out of alignment, or hitting a hard stop, correct the gate condition before returning the operator to service.
Important Ordering Warning
K75-19100 should not be treated as a universal upper arm for all LiftMaster slide gates. Verify by HS670GL parts diagram and operator configuration.
Product Questions and Answers
What does the K75-19100 upper pivot arm do?
It helps transfer movement through the HS670GL linkage assembly while maintaining the correct pivot geometry for gate travel.
Is K75-19100 the same as the lower pivot arm?
No. K75-19100 is the upper pivot arm kit. The lower pivot arm is a separate part number and should not be substituted.
When should this pivot arm be replaced?
Replace it when the arm is bent, cracked, badly corroded, loose at the pivot points, or causing linkage misalignment.
Does this part fit all LiftMaster slide gate operators?
No. It is primarily tied to HS670GL hydraulic slide gate operator applications and should be verified by the parts diagram.
Should other linkage parts be inspected during replacement?
Yes. The lower arm, tension rod, spring, pivot hardware, and gate movement should be checked so the new arm is not overloaded.
