Keep axle grease in and road contamination out. The Lippert 333957 is a purpose-built double lip grease seal designed for Lippert, Dexter, and Al-Ko trailer axle hubs. Sold in a convenient 10-pack, these seals are essential for routine hub service, bearing repacks, and preventive maintenance on travel trailers, fifth wheels, and utility trailers rated from 1,250 to 8,000 lbs.
Grease seals are the first line of defense in any trailer wheel hub assembly. A failed or worn seal allows bearing grease to escape and lets water, dirt, and road grime work their way into the hub -- accelerating bearing wear and risking a wheel-off failure on the highway. The Lippert 333957 double lip design adds a secondary sealing lip for improved contamination exclusion compared to single-lip alternatives.
Whether you are performing an annual bearing repack, replacing a leaking seal after a long trip, or stocking spares for a fleet of trailers, this 10-pack gives you the quantity needed to service multiple axles at once. Each seal matches the original equipment specification for compatible Lippert, Dexter, and Al-Ko hub assemblies.
Two sealing lips work together -- the inner lip retains bearing grease and the outer lip blocks dirt, water, and road debris from entering the hub.
Fits Lippert, Dexter, and Al-Ko trailer axle hubs across a broad capacity range from 1,250 to 8,000 lbs. per axle.
Cross-references to service part number 139514, making it easy to confirm fitment against your existing hub documentation or parts list.
Ten seals per pack -- enough to service five complete hubs or stock spares for multi-axle trailers and fleet maintenance programs.
The grease seal sits at the inboard face of the wheel hub, pressed tightly against the spindle to create a dynamic seal around the rotating axle. Over time, heat cycling, road vibration, and exposure to standing water degrade the seal lips. A compromised seal shows up as grease weeping onto the inside of the wheel or brake drum -- a clear sign replacement is overdue.
The double lip construction on the 333957 is particularly valuable for trailers that see frequent water crossings, boat ramp use, or extended wet-weather towing, where a single lip may not be sufficient to exclude moisture from the bearing cavity.
The 333957 seal is designed for trailer axle hubs with a 1.5-inch bore (inner diameter) and a 1.987-inch housing bore (outer diameter). Confirm both dimensions before installation. This seal is compatible with the following axle brands when the hub bore dimensions match:
Axle capacity range covered: 1,250 lbs. to 8,000 lbs. Always verify by measuring the existing seal or hub bore before ordering if you are unsure of your axle model.
Proper seal installation requires a seal driver or a flat block and mallet to press the seal squarely into the hub bore without cocking it. Never drive a seal in at an angle -- a cocked seal will leak immediately under load. After installation, pack the bearing with a compatible wheel bearing grease rated for trailer use before reassembling the hub.
Covered by a limited 1-year manufacturer warranty from Lippert Components against defects in materials and workmanship.