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Old 28 October 2013, 06:16   #1
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Losing Grease

Hi Guys,

In the summer I towed my boat to Annecy in France and back with no dramas except both of my suspension units lost grease from the inner ( back ) bearings

It basically got sprayed all over the wheel and tyre, I pump'd more grease in at 500 mile intervals but I'm wandering what I did wrong on assembly to cause this ?

The type of wheel bearing is the taper type 44643L/44610

Should the bearing seal be stationery with the Axle or rotate with the wheel ?

Thanks in advance for all replies ...
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Old 28 October 2013, 06:57   #2
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Probably the seal on the back bearing carrier is worn. No drama as long as the bearing isn't getting really hot. Next time you tow it somewhere check the wheel to see if it's really hot. That will mean the bearings might be on there way out
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Old 28 October 2013, 07:09   #3
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Thanks for the reply

There is no heat, I'd say ' warm ' after a few hundred miles

What surprises me is that these were " new" for the trip - which is why I'd thought maybe assembly was wrong
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Old 28 October 2013, 10:55   #4
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or someone has pumped too much grease in and the inner seal has popped out which is VERY common!!
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Old 28 October 2013, 11:32   #5
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Good question - what is the inner seal ?

All I can see is the rubber seal on the rear of the bearing ..
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Old 28 October 2013, 11:32   #6
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Quote:
Originally Posted by matt h View Post
or someone has pumped too much grease in and the inner seal has popped out which is VERY common!!
Agree with what Matt said. Pretty common, if you have grease nipples, to try and get too much in which pushes it through the grease seal out the back.

You shouldn't *need* to put grease in every 500 mi. In theory, it should be a lossless system. Grease will liquefy on running, and re-congeal on sitting.

In practice, you may need to add a bit here and there, but without something like a bearing saver to give you a rough indication, you have no idea how much to add (many have a spring loaded plate that moves as you add grease).

If you do have some sort of indicating bearing saver, my advice is to pump grease in until it is near, but not quite at, full capacity. Lessens the chance of rear seal blowout.

I've attached images of 2 types: One with a blue indicator ring, and one with a sliding plate. For the ring type fill until you can just rock the ring a bit; for the other, fill until the plate is just shy of fully compressing the spring. I'm sure there are other types out there as well.

jky
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Old 28 October 2013, 16:28   #7
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If You have bearing savers and the super hub seal is damaged/worn, it can leak grease from there...
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Old 29 October 2013, 11:22   #8
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or someone has pumped too much grease in and the inner seal has popped out which is VERY common!!

x2
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Old 29 October 2013, 13:50   #9
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Mine have always coated the inside of the wheel with grease & it's never been an issue yet !
I regard it as rust prevention & my bearings don't seem to mind provided I top them up occasionally.
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Old 29 October 2013, 15:58   #10
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Hi Agree with paddlers, one of mine leaks more than other ,were new at start of this season guess stub axle slightly worn ? no real problem keep topped up and clean wheel ( helps with corrosion from launching.
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