The LiftMaster TDC48-10 is an OEM #48 trolley door chain cut and configured for systems using a 10-foot door height rail. Designed for LiftMaster commercial trolley operators, this replacement chain links the operator’s drive sprocket to the sliding trolley carriage, restoring smooth, reliable travel for sectional overhead doors. It’s a direct-fit service part for operators engineered to run #48 chain, helping maintain proper door movement, alignment, and long-term performance in demanding commercial applications.
Use the TDC48-10 when servicing LiftMaster trolley rails specified for #48 chain and a 10-foot door, including select T-Series and other compatible LiftMaster industrial trolley models. For installation, disconnect and lock out power, relieve any tension on the old chain, route the new chain through the rail and around the sprockets, then set chain tension and recheck open/close limits according to the operator’s manual. After replacement, verify safe operation and entrapment protection devices. This is a genuine LiftMaster replacement part suited for repair or upgrade of commercial trolley operator systems that require #48 chain for a 10-foot door configuration.