LiftMaster K75-35627 Commercial Operator E-Box Cover
The LiftMaster K75-35627 is a replacement electrical box cover for select LiftMaster commercial door operators. The E-box cover protects the internal control area, including wiring, relays, transformer, logic board components, and terminal areas depending on the operator configuration.
This is a fitment-sensitive enclosure part. Many commercial operator covers look similar, but small differences in mounting holes, enclosure depth, logic generation, current-sense components, and operator frame layout can prevent interchange.
What This Part Does
The cover helps keep the commercial operator electrical enclosure closed and protected after service. It also helps reduce accidental contact with internal components and keeps dust and debris away from the control section.
A missing, bent, cracked, or incorrect cover can leave the operator electronics exposed and may also make the installation look unfinished or unsafe. Replacement is usually done after cover damage, jobsite impact, corrosion, or loss during service.
Compatible With
K75-35627 is commonly associated with select LiftMaster commercial door operator E-box applications. Compatibility should be confirmed by operator model, logic generation, enclosure style, and parts diagram.
Common Compatible Products and Operator Families
- Select LiftMaster J commercial jackshaft operators
- Select LiftMaster H commercial hoist operators
- Select LiftMaster HJ commercial hoist/jackshaft operators
- Select LiftMaster GH gearhead commercial operators where K75-35627 is shown
- Select LiftMaster GT commercial operators where K75-35627 is shown
- Select LiftMaster T commercial trolley operators where K75-35627 is shown
- Select LiftMaster GSD commercial sliding door operators where K75-35627 is shown
- Commercial E-box assemblies using the K75-35627 cover in the replacement parts diagram
Important Compatibility Notes
- Do not confuse K75-35627 with K75-36913, which is commonly tied to Logic 5.0/current-sense E-box cover applications.
- Do not use this cover for gate operator cabinets unless the parts diagram specifically lists it.
- Confirm if the existing enclosure is standard, NEMA 4, or NEMA 4X before ordering.
Features & Specifications
| Feature / Specification | Details |
|---|
| Manufacturer | LiftMaster |
| Product Type | E-box cover / electrical enclosure cover |
| Part Number | K75-35627 |
| Application | Replacement cover for select commercial operator electrical boxes |
| Compatible Operator Type | Select LiftMaster commercial door operators |
| Common Families | J, H, HJ, GH, GT, T, GSD where diagram-listed |
| Material / Finish | Commercial operator cover assembly; finish may vary by production |
| Notes | Verify operator model, cover shape, mounting holes, and parts diagram. |
Also Known As / Related Part Numbers
This cover may be found under the kit number, with or without the K prefix, or by E-box cover descriptions tied to commercial operator families.
- K75-35627
- 75-35627
- LiftMaster K75-35627 cover
- E-box cover J H HJ
- E-box cover GH GT T GSD
- Commercial operator electrical box cover
- LiftMaster commercial door operator cover
Technician Note
Match the cover by operator parts diagram rather than by the general operator family alone. LiftMaster used multiple covers across Logic 3, Logic 4, Logic 5, and NEMA enclosure configurations.
If the cover was removed because of electrical service, verify all wiring is secure, the enclosure is clean, and no conductors are pinched when the new cover is installed.
Before Ordering, Confirm
- Confirm the original cover or parts diagram shows K75-35627.
- Check the operator model and logic generation.
- Compare mounting screw locations and cover shape.
- Confirm the enclosure is not a different NEMA-style cover.
- Inspect for damaged wiring or components before closing the E-box.
Professional Advisory
This cover protects the operator electrical enclosure but is not a repair for internal electrical problems. Disconnect power before removing or installing covers around commercial operator wiring. Use a qualified technician when high-voltage wiring or control-board service is involved.
Questions & Answers
What is the LiftMaster K75-35627 used for?
It is a replacement E-box cover used on select LiftMaster commercial door operators to cover and protect the operator control enclosure.
Which operators commonly use K75-35627?
It is commonly associated with select J, H, HJ, GH, GT, T, and GSD commercial operator families when the parts diagram calls for this cover.
No. K75-36913 is a different E-box cover commonly tied to Logic 5.0/current-sense applications and should not be treated as interchangeable without confirmation.
Can this cover be selected by operator family only?
No. The cover should be matched by operator model, enclosure style, mounting holes, and replacement parts diagram.
Why should a missing E-box cover be replaced?
A missing cover can expose internal wiring and controls to dust, debris, impact, and accidental contact, so the correct cover should be installed.
