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Post by userix on Feb 22, 2017 5:08:28 GMT -5
After a nice long 50 mi ride tonight, I noticed an excessive amount of gear oil coming out of the gear case breather hole. I filled up the gear oil over 5000 mi ago at the correct level, so it shouldn't be an overfilled gear oil problem. All my rides up till today have been free of excessive gear oil. Tonight, so much gear oil came out the breather hole that it left a small puddle on top of the case and also dripped onto my garage floor. My engine is usually dry with no leaks anywhere and I check daily. I would figure after all this time, the gear oil level would be lower, so it doesn't make sense why all of a sudden all this gear oil would be coming out the breather hole. Is it possible to have gear oil boil over? I'm using 80w-  Castrol gear oil. The red arrow points to my gear case breather hole.  |
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Post by rockynv on Feb 22, 2017 5:36:13 GMT -5
Have you been out in the rain or ridden through standing water lately?
How hot was the gear case or rear brake?
If the brake was dragging or the clutch is starting to slip it could cause this type of issue but there should have been heat and the smell of cooked gear lube along with cooked clutch pads/brake shoes.
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Post by userix on Feb 22, 2017 5:54:49 GMT -5
Scooter wasn't recently ridden through water or the rain. I checked the rear brake, which is drum setup, and without the brake lever engaged, there is no drag or friction; the rear wheel spins freely as it should. So brake drag is not the cause.
As for the clutch, I don't notice any slipping problem. Scooter moves as it should with no hesitation. What would be signs of clutch slipping when riding (ie higher than normal revs)? As for the temp of the case, it didn't seem to be overly hot and there was no smoke coming from that area. I just pulled into the garage and noticed an excess amount of gear oil puddling on the case and a few drips of gear oil on the floor immediately.
I'll pull off the CVT cover and check the clutch tomorrow, but I recently inspected the clutch last week and there are no signs of overheating (no clutch bell bluing).
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Post by cyborg55 on Feb 22, 2017 9:44:39 GMT -5
Check the level again if it's correct then it may have been an over full issue ,,,you may not have had it get warm enough with a long ride to make it expand enough to come out
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Post by rockynv on Feb 22, 2017 12:34:16 GMT -5
After 5,000 miles is this the first long ride or warm day? If you overfilled it X months ago one would expect to have seen evidence of that some time ago.
If the clutch was slipping you would be getting higher than normal revs and lower top speed.
How fast were you going?
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Post by cyborg55 on Feb 22, 2017 13:55:02 GMT -5
I'd think you'd see it also but if he just did short hops it may not have had a chance to get hot enough to show itself,
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Post by userix on Feb 22, 2017 14:43:04 GMT -5
All the previous ride were of the same temperature and distance/duration. They were all at evening with temperatures from 55-65 deg. So not warm at all. Speeds were average 50-60mph. RPMs were within the usual range. Nothing different from the other rides, just the excessive oil coming out the breather hole.
At what temperature does gear oil boil over? I doubt splash lubrication would throw out this much gear oil and like you said, if I did overfill previously, I would have noticed right after the first ride excess gear oil spewing out.
So weird...
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Post by cyborg55 on Feb 22, 2017 15:35:01 GMT -5
You gotta get gear oil hot to boil,, I mean hot,, I've built dozens of cars and bikes,, I've never have seen it
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Post by onewheeldrive on Feb 23, 2017 18:08:21 GMT -5
Is that gear oil synthetic?
I normally use synthetic gear oil, but once I didn't and went a really long time without changing it, it looked pretty funky. I can't remember exactly what it looked like, but it looked bad. Maybe change it more if it's not synthetic?
If you google "milky grey gear oil", you'll find posts/threads (esp for marine vehicles) talking about water in the gear oil.
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Post by cyborg55 on Feb 23, 2017 23:47:11 GMT -5
That's water contamination ,,, this is why your blowing oil you had a bunch of water got it there somehow someway,,,got to fill it again run it for a day or two and dump it,,2 times
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Post by userix on Feb 24, 2017 5:52:30 GMT -5
Yeah it's synthetic. Castrol syntrax LsD gear oil
I drained, flushed it with fresh oil and then filled it and rode still had oil coming out the hole. So I have to drain, fill, and ride more than once?
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Post by rockynv on Feb 25, 2017 11:42:31 GMT -5
The $50 question is - Where did the water come from on an air cooled bike that has not seen water or rain "recently" yet suddenly have water in the gear oil?
Prank? Freak flood? Slept through the bad storm that hit while it was outside uncovered. That much humidity?
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Post by userix on Feb 25, 2017 15:04:56 GMT -5
The $50 question is - Where did the water come from on an air cooled bike that has not seen water or rain "recently" yet suddenly have water in the gear oil? Prank? Freak flood? Slept through the bad storm that hit while it was outside uncovered. That much humidity? Valid question. More like the million dollar question lol It is always covered with a water,weather resistant cover. In addition, it's parked under a weather and rain proof 10'x 10' canopy. It's kept behind locked gate and there is no one else there to mess with it. It did rain really hard the past couple weeks before this incident. I notice the gasket covers the portion where the breather hose attaches to the casing. The gasket pretty much seals the whole breather hose section off, minus a small hole. If this portion of the gasket is completely deteriorated, would that be the cause? I haven't split my gear case yet, planning to do that later to check.  |
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Post by cyborg55 on Feb 25, 2017 22:07:13 GMT -5
You could have been punked,,but I doubt it,,,but make no mistake that definitely was water contamination
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Castrol gear oil.
