LiftMaster K75-34790 Disconnect Kit K75-37544 for SL585 Operators
The LiftMaster K75-34790 disconnect kit is a replacement manual disconnect hardware kit for select LiftMaster SL585 slide gate operators. The disconnect assembly allows the operator drive system to be disengaged so the gate can be moved manually when service access is needed, during certain emergency conditions, or when power is unavailable and the gate installation is safe to move by hand.
A worn or damaged disconnect assembly can make it difficult to release the gate, may not re-engage properly, or may leave the operator unable to transfer drive power correctly. This kit is often ordered when the handle, bracket, linkage, spring, or related release hardware has been bent, corroded, lost, or damaged from repeated use.
Compatibility is centered on the SL585 slide gate operator family, including commonly referenced GL and UL versions, when the operator parts diagram calls for this kit. The related number K75-37544 is often seen with this assembly, but the existing operator hardware should be checked because disconnect designs can differ between operator families and production generations.
Features & Specifications
| Manufacturer | LiftMaster |
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| Product Type | Disconnect kit / manual release hardware |
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| Part Number | K75-34790 |
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| Application | Manual disconnect service kit for select slide gate operators |
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| Compatible Operator Type | Commercial slide gate operators |
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| Related Number | K75-37544 |
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| Notes | Primarily associated with LiftMaster SL585 applications |
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Compatible With
- LiftMaster SL585 slide gate operators when the parts diagram lists K75-34790
- LiftMaster SL585GL slide gate operators where this disconnect kit is shown in the parts breakdown
- LiftMaster SL585UL slide gate operators where this kit matches the installed disconnect assembly
- Select SL585 service applications associated with K75-37544 related disconnect hardware
Also Known As / Related Part Numbers
- K75-34790
- K75-37544
- 75-34790
- 75-37544
- LiftMaster K75-34790
- LiftMaster K75-37544
- SL585 disconnect kit
- SL585 manual release kit
- SL585 emergency disconnect hardware
Technician Note
The disconnect kit should not be used to compensate for a gate that is hard to move. A properly balanced and aligned slide gate should roll freely by hand after it is disconnected from the operator.
Before Ordering
- Verify the operator is an SL585 or listed SL585 variant.
- Compare the existing disconnect hardware to the parts diagram.
- Confirm whether the diagram references K75-34790, K75-37544, or a related service kit number.
- Inspect gate rollers, track, chain, sprockets, and stops before blaming the disconnect hardware.
- Check that the gate can be safely moved manually before releasing it from the drive system.
Important Ordering Warnings
- Not a universal kit for every LiftMaster slide gate operator.
- Do not force the disconnect handle if the gate load or drive system is bound. Diagnose the gate and operator first.
Professional Advisory
Commercial slide gates are heavy and can move unexpectedly if the gate is out of balance, on a slope, or not properly controlled. Service should be performed by a qualified gate technician when the gate is difficult to move or the disconnect does not re-engage cleanly.
Product Questions & Answers
What does the K75-34790 disconnect kit repair?
It repairs or replaces the manual disconnect hardware used on select SL585 slide gate operators so the operator can be disengaged and re-engaged properly.
Is K75-37544 related to K75-34790?
Yes, K75-37544 is commonly associated with this SL585 disconnect kit family. Confirm the number shown on the operator parts diagram before ordering.
Will this fit an SL3000 or another slide operator?
Do not assume it will. This kit is primarily associated with SL585 applications and should only be used where the correct parts diagram lists it.
Why is my slide gate still hard to move after using the disconnect?
The gate may have track, roller, chain, alignment, or physical obstruction problems. The disconnect kit does not correct gate hardware issues.
Should the disconnect be used for daily operation?
No. It is intended for service, emergency release, or manual movement when needed, not as a normal daily operating method.
