Liftmaster 77-36764 / K77-37812 replacement Crank Bracket Kit Slide Gate Operators
The LiftMaster K77-37812 crank bracket kit is a mechanical hardware replacement kit used on select LiftMaster slide gate operators. It is associated with older 77-36764 crank bracket kit references and related 77-50382 service part listings. This type of bracket is used around the slide operator chain/crank hardware area and is usually replaced when the original bracket has been damaged, lost, bent, or worn from service use.
Because slide gate operators use different chassis layouts and chain hardware by model family and production generation, this bracket kit should be confirmed against the operator parts diagram. A bracket that looks similar may not place the chain, crank, or release hardware in the correct position.
When replacing mechanical bracket hardware, inspect the gate track, chain tension, idler assemblies, chain bolts, and mounting hardware. A bent bracket can be a symptom of excessive chain tension, gate binding, impact damage, or a gate that is not rolling freely.
Compatible With
- Select LiftMaster slide gate operators where the parts diagram calls for K77-37812
- Select LiftMaster slide gate operators listed under older crank bracket kit number 77-36764
- Applications referencing related service number 77-50382
- Slide gate operator chain/crank hardware assemblies with matching bracket design
- Verify by operator model, serial/generation, and replacement parts diagram
Features & Specifications
| Manufacturer | LiftMaster |
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| Product Type | Crank bracket kit |
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| Part Number | K77-37812 |
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| Application | Select slide gate operator mechanical hardware |
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| Compatible Operator Type | Slide gate operators |
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| Related References | 77-36764; K77-36764; 77-50382 |
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| Notes | Confirm bracket style and mounting points before ordering |
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Also Known As / Related Part Numbers
- K77-37812
- 77-36764
- K77-36764
- 77-50382
- LM-K77-37812
- Crank bracket kit
Technician Note
If the original bracket is bent or cracked, check the gate for binding and inspect chain alignment before installing the new bracket. Replacing the bracket without correcting the mechanical cause can lead to repeat failure.
Before Ordering
- Confirm the operator is a compatible LiftMaster slide gate model
- Match the parts diagram to K77-37812, 77-36764, or 77-50382
- Compare bracket shape and mounting holes to the existing hardware
- Inspect chain tension, chain bolts, and gate travel before reassembly
Professional Advisory
Gate hardware should be serviced with the operator powered down and the gate secured. A heavy slide gate can move unexpectedly if mechanical parts are loosened under tension.
Important Ordering Warning
This is not a universal slide gate bracket. Similar brackets may not line up correctly with the chain path, crank handle, or mounting holes.
Product Q&A
Is K77-37812 the same as 77-36764?
K77-37812 is commonly associated with the 77-36764 crank bracket kit listing. Use the operator parts diagram to confirm the correct current service part.
What does this crank bracket kit fit?
It is for select LiftMaster slide gate operators that call for this crank bracket kit in the parts diagram.
Should I replace chain hardware at the same time?
Inspect the chain bolts, chain brackets, chain tension, and related hardware. Replace worn or damaged related parts as needed.
Why did the original bracket bend?
Common causes include gate binding, excessive chain tension, impact damage, misalignment, or worn rolling hardware.
Can this bracket be used on swing gate operators?
No. This kit is intended for select slide gate operator applications, not swing gate operators.
