Ariens 21543845 Lip Seal 0.375 X 0.75 X 0.25 Inches

Product Description

The ARIENS 21543845 is a lip seal designed to prevent lubricant loss and contamination ingress at rotating shaft interfaces in lawn and garden power equipment. Lip seals of this type form a flexible contact barrier between a rotating shaft and a stationary housing bore, keeping grease or oil contained while blocking dirt, moisture, and debris from entering the bearing cavity. This seal measures 0.375 inches inner diameter, 0.75 inches outer diameter, and 0.25 inches in width. It is an OEM replacement part sourced directly through Ariens, making it appropriate for service technicians performing drivetrain or gearbox maintenance on Ariens-branded outdoor power equipment.

This lip seal is used in residential lawn and garden applications where rotating shafts pass through housings in drive systems, gearboxes, or wheel axle assemblies. Installers servicing Ariens walk-behind mowers, zero-turn mowers, tillers, or similar equipment will encounter this seal during gear case rebuilds or when addressing lubricant leaks. Proper fitment depends on matching all three dimensions precisely to the housing bore and shaft diameter in the assembly being serviced.

Key Features

• Inner diameter of 0.375 inches fits standard small-shaft gearbox and drivetrain applications
• Outer diameter of 0.75 inches for positive press-fit into the mating housing bore
• Width of 0.25 inches for compact installation in shallow seal pockets
• OEM Ariens part number ensures correct dimensional and material match for factory-specified fitment
• Lip seal design provides a dynamic sealing surface against rotating shafts to retain lubricant and exclude contaminants

Compatibility

Designed as an OEM-style replacement lip seal for Ariens lawn and garden power equipment requiring a 0.375 inch bore, 0.75 inch outer diameter, 0.25 inch width seal.

Installation Notes

Installation of this lip seal is typically performed by small engine or outdoor power equipment technicians during gearbox or drivetrain service. Before removal of any housing or gear case cover, disconnect the spark plug wire and drain or contain any lubricant present in the assembly. Press the seal squarely into the housing bore using an appropriately sized driver or socket that contacts the outer diameter only — never press on the lip or spring element, as this will damage the sealing surface. Verify shaft surface condition before installation, as a scored or pitted shaft will compromise seal life regardless of seal quality.

Technical Specifications

• Inner Diameter: 0.375 inches
• Outer Diameter: 0.75 inches
• Width: 0.25 inches
• Seal Type: Lip Seal

Standard Information

• Brand: ARIENS
• Manufacturer Part Number: 21543845