LC8 engine: Dangerous design flaw identified - Oil pump gear

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limeyduffa
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LC8 engine: Dangerous design flaw identified - Oil pump gear

Postby limeyduffa » Sat Sep 15, 2018 1:52 am

Hi All

Had a concerning post from a 2012 KTM 990 SMT owner on the ktmsmt.com site. His oil pump gear (600 38 001 024) snapped in half during a spirited ride. He contacted KTM, but is getting brick walls going up :roll:. This looks like a straight out design flaw that should have been a safety recall in my opinion (Looks like KTM have superseded this gear with a different design). Follow here:

http://www.ktmsmt.com/viewtopic.php?f=13&t=11930
2012 990 SMT

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scamb66
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Re: LC8 engine: Dangerous design flaw identified - Oil pump

Postby scamb66 » Wed Sep 19, 2018 11:22 pm

Maybe a one-off, I can't recall any oil pump issues on the 990 here and there is a fair amount of "spirited" riding happening.
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limeyduffa
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Re: LC8 engine: Dangerous design flaw identified - Oil pump

Postby limeyduffa » Fri Nov 30, 2018 10:33 am

scamb66 wrote:Maybe a one-off, I can't recall any oil pump issues on the 990 here and there is a fair amount of "spirited" riding happening.

There's been more than one case. As you said, very rare. But would you bet your life on it ?, or spend 70 bucks on the revised revision for piece of mind ?

I've got my part and clutch tool. Just waiting for the time to do it. Hopefully next month.
2012 990 SMT

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limeyduffa
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Re: LC8 engine: Dangerous design flaw identified - Oil pump

Postby limeyduffa » Thu Jan 31, 2019 1:08 pm

Does anyone know what has happened to the SMT forum ? (www.ktmsmt.com). It's been gone for a week.

Anyway, I replaced my oil pump gear on the weekend. My original gear has no damage.

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2012 990 SMT

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Scotty
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Re: LC8 engine: Dangerous design flaw identified - Oil pump

Postby Scotty » Thu Jan 31, 2019 1:49 pm

As an Engineer, an obvious design flaw in the left of the two gears you show isn't apparent. They've remodelled it without all the lightening holes, through which a crack would probably propagate, though there aren't any obvious stress-raisers in it. Maybe it was a heat-treatment issue and they had a few that escaped the safety net....
Wheelies - they ARE big, and they ARE clever....

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limeyduffa
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Re: LC8 engine: Dangerous design flaw identified - Oil pump

Postby limeyduffa » Fri Feb 01, 2019 9:36 am

Thanks Scotty. I'll take your word for it :). I have no mechanical qual.

In Australia, we don't have any opportunities to ride hard due to the low speed limits. So, our bikes have an easier life than in other countries whose bikes regularly see 180+km/h. My example is not a good one and I wasn't expecting to see any malfunction.
2012 990 SMT


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