LiftMaster Belt Drive Trolley 41B3869-1 Chamberlain Craftsman by LiftMaster

Q: Will this work for a craftsman model number 139.53975SRT1?

I don’t know this for sure. If you have this number you can google the instructions book which would have a item list to put the opener together.

Q: Does this come with all of the parts to also attatch belt.

It has the bracket where you attach the bolt for the chain or belt??

Q: Does this box contain the spring steel slide component as well as the outer trolley?

Aye- the part I think you're referring to is what we all see wearing out and binding. It's inside the outer trolley when operating the door. This replacement should have both parts included: https://www.liftmaster.com/customer-support/parts/model-041b3869-3a

Q: Will this trolley work with a liftmaster 41D7675 P3 model?

It should work, except if you're using square rail.

4.5/5

Product ID: 208020763

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Details

Brand
LiftMaster
Manufacturer
Chamberlain
UPC
733353125273

📦Compact, lightweight design (590g)

🔧Seamless compatibility across top brands

⚙️Precision-engineered belt drive

Frequently Bought Together

LiftMaster Belt Drive Trolley 41B3869-1 Chamberlain Craftsman

41A5434-11 Garage Door Openers Belt, The 041A5434-11A Drive Belt Compatible with Liftmaster/Chamberlain/Sentex/Whisper Garage Door Opener Models 41a5483-4b, 2280, 2500, 2580, 3280, 3500, 3580

LIFTMASTER Garage Door Openers 41B4103 Tensioner Assembly

Description

⚙️ Upgrade your garage game with authentic precision!

UNIVERSAL FIT - Compatible with Chamberlain, Craftsman, and LiftMaster models without square rails—no guesswork needed
EASY INSTALLATION - Lightweight (590g) and compact design simplifies replacement and setup
GENUINE OEM QUALITY - 100% authentic LiftMaster part ensures durability and peak performance
RELIABLE REPLACEMENT - Direct swap for parts 41B3869-3A, 41B3869, and 41B3869-1—get back to convenience fast
EFFORTLESS GARAGE ACCESS - Smooth, quiet belt drive technology for whisper-quiet operation

The LiftMaster Belt Drive Trolley 41B3869-1 is a genuine OEM replacement part designed for Chamberlain, Craftsman, and LiftMaster belt drive garage door openers without square rails. Weighing just 590 grams and packaged compactly, it ensures smooth, quiet operation and easy installation, restoring your garage opener’s reliability and performance.

Specifications

Manufacturer	Chamberlain
Part Number	41A3869-1
Package Dimensions	15.5 x 10.2 x 5.8 cm; 590 g
Item model number	41A3869-1
Item Package Quantity	1
Batteries included?	No
Batteries Required?	No
Item Weight	590 g

Have a Question? See What Others Asked

Will this work for a craftsman model number 139.53975SRT1?

Does this come with all of the parts to also attatch belt.

Does this box contain the spring steel slide component as well as the outer trolley?

Will this trolley work with a liftmaster 41D7675 P3 model?

Common Questions

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