Forum Discussion
Supreme_Oppress
Mar 06, 2014Explorer
The main reason I repack annually is it gives me an opportunity to have a look at the brakes. Drum brakes are not the best and trailers that sit a lot are prone to rust. I clean and repack the bearings while in there out of habit from my marine wrenching days. The bearing race is a diary of bearing condition and I would rather have to replace them in my driveway than on the side of a highway.
Those grease zerks on the axle also come with a specific set of instructions and failing to follow them can cause issues. Manufacturer recommends jacking the wheel up and rotating slowly while pumping. The grease goes into the space between the inner bearing and the seal, works its way through the bearing itself, does the same with the outer bearing and you can see the grease coming out through the bearing when everything is full. Not rotating, pumping too fast or using a power grease gun can blow out the rear seal which lubricates your brakes (even a really cheap grease gun can do several thousand PSI). If everything is good, it should only take a small amount of pumping before you see grease coming out the front. If it takes a lot - as the previous poster said "bearings do not consume grease" so it had to go somewhere else: likely out the rear seal into your brakes.
That's a lot of words but its -30°C (-22°F) here right now. ;)
Those grease zerks on the axle also come with a specific set of instructions and failing to follow them can cause issues. Manufacturer recommends jacking the wheel up and rotating slowly while pumping. The grease goes into the space between the inner bearing and the seal, works its way through the bearing itself, does the same with the outer bearing and you can see the grease coming out through the bearing when everything is full. Not rotating, pumping too fast or using a power grease gun can blow out the rear seal which lubricates your brakes (even a really cheap grease gun can do several thousand PSI). If everything is good, it should only take a small amount of pumping before you see grease coming out the front. If it takes a lot - as the previous poster said "bearings do not consume grease" so it had to go somewhere else: likely out the rear seal into your brakes.
That's a lot of words but its -30°C (-22°F) here right now. ;)
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