The LiftMaster TDC48-08 is a genuine OEM #48 trolley drive chain cut for an 8-foot door, engineered for LiftMaster commercial trolley-style garage door operators. It transfers power from the operator sprocket to the trolley carriage along the rail, restoring smooth, accurate door travel when a worn or stretched chain needs replacement. Ideal for sectional overhead doors in commercial and industrial environments, this replacement chain helps maintain consistent operation and alignment in systems that specify #48 chain.
Use the TDC48-08 when your LiftMaster trolley operator requires a #48 chain and is configured for an 8-foot door height. For installation, disconnect power, secure the door, relieve chain tension, replace the chain, and set the correct sag per LiftMaster service guidelines before checking and re-adjusting open/close limits as needed. After service, verify entrapment protection and perform a full operational test. This OEM replacement chain supports reliable performance in commercial sectional door applications and is intended for use by qualified technicians familiar with LiftMaster trolley operator maintenance.