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  #1  
Old 12-22-2006, 07:36 PM
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Oil bath bearings / oil type??

I bought 2 stroke 50W oil for my oil bath bearings is this the one to use???

And it is semi synthetic.
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Old 12-22-2006, 08:45 PM
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i don't have oil bearings, however, i don't believe 2 stroke oil is what you're looking for. you'd probably be better off with some type of gear oil, like for a rear diff.
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Old 12-22-2006, 08:54 PM
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I would think 80 or 90 weight.
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Old 12-22-2006, 08:58 PM
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Unbolt the fill plug, add 80-90 weight gear oil, apply Never-Sieze to the fill plug and torque it down to about 7 ft-lbs.
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Old 12-22-2006, 09:02 PM
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Why does the see through cap then say that one should use 50W oil and nothing else?????????
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Old 12-22-2006, 09:08 PM
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Quote:
Originally Posted by wilhelmwake
Why does the see through cap then say that one should use 50W oil and nothing else?????????
Dunno...

...from the MasterCraft trailer owner's manual
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Old 12-22-2006, 09:12 PM
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wilhelmwake wilhelmwake is offline
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I'll go get my manuals and see myself, but like said the see thru cap says that one should use 50W oil. It does not specify at all what type of oil should be used.
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Old 12-22-2006, 09:35 PM
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Yep I have to agree with gear oil statement!!!! Yes the trailer manual actually recommends 80-90 weight gear oil. Super that I posted this thread before performing the service, so thanks guys

I drive to the parts store and get myself some gear oil. Still it is quite confusing that the wheel hubs say 50W and the owners manual says 80-90W
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Old 12-22-2006, 09:54 PM
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90 weight seems to make the most sense, just like the oil in your trucks rear differential. I assume you drain out the old by jacking up the trailer and rotating the plug so it faces down to drain. Then rotate again to fill.
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Old 12-23-2006, 01:16 PM
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I came across this conflict of info between the 2005 owners manual and what the hub says too. However, when I drained my hubs for the first time I smelled the oil and it definitely didn't have a 80-90 gear oil smell - that hypoid oil really has a distinct odor to it. I'm positive it was motor oil. What weight I'm not sure, but I went ahead and put 50W motor oil in (because that's what it said on the hub cap).

I towed it about a 1,000 miles last season without issue. I'm sure the 80-90 would work fine too though...same stuff in a rear differential and has same type of roller bearings inside, so should do the job as well.
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