LiftMaster K07-8058 Crank Link for BG790 Barrier Operators
The LiftMaster K07-8058 is a crank link used in the LiftMaster BG790 industrial barrier gate operator. This linkage piece connects the crank mechanism to the barrier arm assembly so the wishbone arm can move through its travel smoothly and with proper leverage. It is a common inspection point after a barrier arm strike, linkage bind, bent crank hardware, or uneven arm movement. The BG790 is a heavy-duty operator, so linkage parts are exposed to repeated cycles and high mechanical load. This crank link should be matched to the BG790 parts diagram and should not be confused with other LiftMaster crank links used on BG770 or other barrier gate models.
Compatible With
- LiftMaster BG790 barrier gate operator. Parts diagrams identify K07-8058 / 07-8058 as the BG790 crank link; verify before using on any other barrier operator.
Compatibility should be verified by the operator model number, original part number, and replacement-parts diagram. LiftMaster barrier and commercial gate operator parts often look similar across model families but may use different shafts, collars, hubs, link geometry, or mounting hardware.
Features & Specifications
| Manufacturer | LiftMaster / Chamberlain Group |
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| Product Type | Crank link replacement |
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| Part Number | K07-8058 |
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| Application | BG790 barrier gate arm linkage |
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| Compatible Operator Type | LiftMaster BG790 industrial barrier gate operator |
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| Material / Finish | Zinc-plated steel / heavy-duty linkage |
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| Related Numbers | 07-8058, G078058 |
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| Notes | Verify BG790 parts diagram and inspect related crank hardware |
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Also Known As / Related Part Numbers
- K07-8058
- 07-8058
- G078058
- LiftMaster crank link
- BG790 crank link
Technician Note
Before replacing this part, check the surrounding mechanical assembly for looseness, worn pivot points, damaged shafts, missing set screws, bent linkage, or signs of a gate or arm impact. Replacing one worn part without correcting the cause can lead to repeat failure.
Before Ordering Checklist
- Match the manufacturer part number and any older Q/G/07-series number to the original part or parts diagram.
- Confirm the operator model, series, and mechanical assembly location before ordering.
- Inspect adjacent shafts, cranks, bearings, fasteners, and linkage hardware for damage or wear.
- Do not order by appearance only; similar LiftMaster mechanical parts may not interchange.
Important Ordering Warnings
- K07-8058 is not the same as K07-8005. Do not interchange crank links by appearance only.
- After an arm strike, inspect the hub, cranks, shaft, hardware, and limit settings before returning the operator to service.
Professional Advisory
Mechanical gate and barrier operator repairs should be performed with the operator secured and power disconnected by a qualified gate technician. If the operator has impact damage, binding, unsafe movement, or high-voltage wiring exposure, have the full system inspected before returning it to service.
Product Q&A
Which operator does K07-8058 fit?
K07-8058 is most strongly listed for the LiftMaster BG790 industrial barrier gate operator.
What does this crank link connect?
It connects the crank mechanism to the barrier arm linkage so the BG790 arm can raise and lower correctly.
Is G078058 an alternate number?
Yes, G078058 and 07-8058 are commonly listed as related or alternate numbers for K07-8058.
Can this replace K07-8005?
No. K07-8058 and K07-8005 are different crank link references. Use the exact number shown in the operator parts diagram.
What should be checked with this part?
Inspect the arm hub, crank parts, shaft, fasteners, and arm assembly for wear, looseness, or impact damage.
