The LiftMaster K10-10709 Disconnect Lever is a genuine OEM replacement part engineered for LiftMaster MJ and HMJ commercial door operators. This lever is part of the operator’s manual disconnect mechanism, allowing the drive to be disengaged so the door can be operated manually during a power outage, maintenance, or service. Designed specifically for the MJ jackshaft and HMJ hoist/jackshaft platforms, it helps restore smooth, reliable emergency release function on commercial and industrial sectional or rolling door systems where these operators are specified.
Compatibility is limited to LiftMaster MJ and HMJ models; verify your operator’s model tag and parts diagram before ordering. Installation is typically performed at the operator head within the disconnect assembly and should be completed with power off and proper lockout/tagout procedures. After replacement, confirm the lever actuates freely, re-engages the drive correctly, and that door balance and limits are verified per the operator manual. For best results, reference the LiftMaster MJ/HMJ service documentation or consult a qualified door professional. This replacement disconnect lever supports dependable manual operation, making it a critical service part for facilities that need code-compliant, ready access to emergency release on LiftMaster commercial garage door operators.