LiftMaster 16-5L304 Cogged V-Belt – 30.4-Inch Commercial Operator Drive Belt

The LiftMaster 16-5L304 is a cogged V-belt used to transfer motor power through the drivetrain of compatible LiftMaster commercial door and gate operators. Its notched construction provides flexibility around the operator pulleys while maintaining reliable power transmission.

Also referenced as K16-5L304 and 5L304.

Specifications

• Belt type: Cogged or notched V-belt

• Belt profile: 5L

• Belt reference: 5L304

• Nominal outside length: Approximately 30.4 inches

• Published replacement length: Approximately 30-1/32 inches

• Nominal top width: Approximately 5/8 inch

• Application: Commercial operator motor and reduction drive

• Quantity: One belt

Compatibility

Used with select LiftMaster commercial operators whose parts diagram specifies 16-5L304 or K16-5L304. Compatible applications may include certain:

• DH and DJ operators

• H and HJ operators

• J jackshaft operators

• SL575GL gate operators

• Other commercial operator configurations using the 5L304 belt size

Match the complete part number, belt profile, width, length, operator model, horsepower and pulley arrangement. A visually similar V-belt with a different profile or length may not operate correctly.

Common Replacement Indicators

• Cracks between the belt cogs

• Glazed, hardened or polished belt surfaces

• Frayed belt edges

• Excessive belt dust inside the operator

• Belt slips under normal operating load

• Motor runs while the driven pulley moves inconsistently

Inspect both pulleys, shaft alignment and bearings before installing a replacement belt. A worn or misaligned pulley can quickly damage the new belt.

Package Contents

• One LiftMaster 16-5L304 cogged V-belt

Pulleys, keys, shafts and tensioning hardware are not included.

Installation & Safety

Disconnect and lock out operator power before installation. Do not pry the belt over a pulley with a screwdriver; loosen the applicable motor or tensioning hardware.

Set belt tension according to the operator manual. Excessive tension can overload the motor, reducer and pulley bearings, while insufficient tension can cause slipping and premature belt wear.