Springs

Wayne Dalton Trolley Arm Attachment Operator Bracket

SKU: WD-322984

Old Part Number: 320787
Description

Wayne Dalton Trolley Arm Attachment Operator Bracket

Wayne Dalton garage door opener bracket for connecting your chain, screw or belt drive garage door opener to your door. Fits directly over top section of garage door and attaches to built in strut. For models 9100, 9600, 5120, 5140.

Includes:
  • Garage door opener bracket 320787
  • Hardware bag 321475
  • Installation instruction manual

Specs:

  • 4-1/2" Wide
  • 2-3/4" Tall, with 15/16" flange at bottom
  • 6 - 13/64" drilled bolt holes on back of bracket
  • 2 - 11/64" screw holes on front top lip of bracket
  • Riveted clevis with 13/32" diameter clevis pin hole
  • Constructed of 16 gauge galvanized steel.
Compatibility
Compatible with:
  • Compatible with all Wayne Dalton 9100, 9600, 5120, and 5140 doors
Instructions
Installation Instructions - Click here to download manualOld Part Number: 320787
Reviews
FAQs
Why Do Garage Doors Need Torsion Springs Expert Explains

Why Do Garage Doors Need Torsion Springs? Expert Explains

October 08, 2025 3 min read

Think of your garage door springs like the counterweight in an old elevator. Without them, your door would be incredibly difficult to lift manually, and your garage door opener would burn out trying to handle all that weight on its own.

Read More
What Size Garage Door Spring for a 16x7 Door

What Size Garage Door Spring for a 16x7 Door?

October 07, 2025 3 min read

Here's something that surprises a lot of people: there are usually several different spring combinations that will work for your 16x7 door. You might be able to use a single heavy-duty spring or two lighter springs, depending on your setup and preferences.

Read More
Are Longer Garage Door Springs Really Stronger?

Are Longer Garage Door Springs Really Stronger? The Truth Might Surprise You

October 06, 2025 3 min read

Don't get caught up in the "stronger is better" mindset when it comes to garage door springs. Focus on getting the correct spring instead. Your door will work smoother, last longer, and save you headaches down the road.

Read More
Description

Wayne Dalton Trolley Arm Attachment Operator Bracket

Wayne Dalton garage door opener bracket for connecting your chain, screw or belt drive garage door opener to your door. Fits directly over top section of garage door and attaches to built in strut. For models 9100, 9600, 5120, 5140.

Includes:
  • Garage door opener bracket 320787
  • Hardware bag 321475
  • Installation instruction manual

Specs:

  • 4-1/2" Wide
  • 2-3/4" Tall, with 15/16" flange at bottom
  • 6 - 13/64" drilled bolt holes on back of bracket
  • 2 - 11/64" screw holes on front top lip of bracket
  • Riveted clevis with 13/32" diameter clevis pin hole
  • Constructed of 16 gauge galvanized steel.
Compatibility
Compatible with:
  • Compatible with all Wayne Dalton 9100, 9600, 5120, and 5140 doors
Instructions
Installation Instructions - Click here to download manualOld Part Number: 320787
Reviews
FAQs