The LiftMaster K75-10170 Trolley Slider Assembly Kit is a genuine OEM replacement for LiftMaster trolley-style garage door operators. This assembly travels along the operator rail and engages the door arm to convert the opener’s drive motion into smooth, reliable open/close travel. It is ideal for restoring performance when the original slider becomes worn or damaged, helping reduce chatter and ensuring consistent operation in maintenance or repair scenarios. Common use cases include commercial and light‑industrial sectional overhead door systems where a trolley operator is specified.
A genuine LiftMaster component, the K75-10170 installs in place of the factory trolley on compatible operators. For safety, disconnect power and follow lockout procedures per the opener manual. After installation, reattach the door arm, verify chain or belt tension as applicable, re-set open/close limits and force, and test entrapment protection devices to meet UL 325 requirements. Because compatibility is model-specific, confirm the part number against your opener’s parts diagram or contact LiftMaster with your operator model and serial. This OEM replacement part supports dependable operation and helps extend the service life of LiftMaster trolley openers used in commercial applications.
LiftMaster K75-10170 Reference Guide
Official Model Compatibility for Trolley Slider Assembly
Product Compatibility Matrix
| Series Class | Specific Models | Application |
|---|---|---|
| MT Series | MT, MT3311, MT5011 | Medium-Duty Logic |
| T Series | T, T331, T501, T751, T101 | Industrial-Duty Logic 5.0 / 4.0 |
| GT Series | GT, GT501, GT751, GT101 | Heavy Industrial Gearhead |
| Specialty | TDC, GSD, BMT | DC & Continuous Duty |
Technical Cross-Reference
The K75-10170 is often identified by manufacturing stamp 08-10169. It is compatible with all LiftMaster 2" and 3" C-Channel Rails for Trolley Operators.