Definition
The carriage that slides along the opener rail and connects to the door arm — it is the part the motor actually pulls. The trolley also houses the disconnect for the emergency release cord, so when you pull the red handle you are uncoupling the trolley from the drive. Stripped or cracked trolleys are a common failure on older openers: the motor runs, the chain moves, and the door stays put. That symptom is usually a quick, inexpensive Door Serv Pro repair.
Why this term matters for homeowners
Opener terminology typically points to drive type, horsepower, battery backup, and how smart access like myQ changes daily convenience and security.
- Use this term to ask better follow-up questions during estimates.
- Look for this language in Learn and Evaluate guides to connect definition to decisions.
- Confirm how this applies to your specific door size, age, and daily use.
Related pages
Category: Openers & Smart Access