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How Often Should Trailer Hub Bearings be Greased


I have a magic Tilt boat trailer with ezlube axle should I pump grease into bearings after every trip I launch and retreive boat?


Expert Reply:

Standard tapered trailer wheel bearings are recommended to be re-packed with fresh bearing grease about every year or every 12,000 miles under normal use. In certain conditions this interval could be shorter, such as if you routinely tow the trailer under conditions of extreme heat or near its maximum load capacity. This and other recommended trailer maintenance procedures are outlined in the linked article, which may interest you.

With the EZ lube zerk fitting you'll want to pump grease until you begin to see the outer bearing move or you see grease seeping through the outer bearing. If you pump the grease slowly and rotate the hub, you should not blow the grease seal. Once you see the grease seeping through, you can install the washer, spindle nut and nut retainer. Keep in mind, when threading on the castle nut, you will want to tighten the nut until it is hand tight and then slightly back it off. Continuing to pump grease into the hub after it's full will not be recommended. The grease shouldn't go anywhere over time so you'd eventually end up blowing the seal.

expert reply by:
Jameson C

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