Details

LiftMaster Curved & Straight Door Arm Kit with Bracket & Hardware for Door Opener Systems - K75-12870

The LiftMaster K75-12870 Curved and Straight Door Arm Kit serves as a genuine replacement set for various Logic 5.0 and MAXUM Series DC Trolley Commercial Door Openers. This complete kit includes both straight and curved arms, a door bracket, an emergency release rope, and screws. It is engineered to restore reliable movement and alignment between your door and Opener assembly. Designed to OEM standards, this kit ensures proper fit and consistent performance for a wide range of LiftMaster commercial systems.

Features

• Genuine LiftMaster replacement part for Logic 5.0 and MAXUM DC Trolley Openers
• Includes straight and curved door arms for flexible mounting
• Restores smooth, accurate door travel
• Prevents misalignment and stress on trolley assembly
• Includes all required mounting hardware and components

Specifications

• Compatible Opener Types: DC Trolley and Jackshaft Commercial Openers
• Material: Heavy-duty steel construction
• Finish: Factory LiftMaster coating for corrosion resistance
• Application: Replacement arm assembly and linkage kit

Kit Includes

• Straight door arm
• Curved door arm
• Door mounting bracket
• Emergency release rope
• Replacement hardware set

Compatible With

• BMT - Belt-Drive Medium-Duty Trolley Opener
• GT - Heavy Industrial-Duty Trolley Opener
• JDC - Jackshaft DC Commercial Opener
• MT - Medium-Duty Logic Trolley Opener
• T - Industrial-Duty Trolley Opener
• TDC - Trolley DC Commercial Opener