2010 EC 300 Water pump shaft snapped & bearing collapsed

[justsam]

Half way through an Enduro yesterday I crashed whilst flat out up a gnarly hill. The bike fell gently on its right and immediately started rattling/knocking. I presumed it had moved the front pipe but it was not that and something terminal. End of my effort at the Dogs of WOR
On inspection I removed the right side engine and found the the water pump shaft snapped and the bearing in the crankcase totally collapsed, even the outer shell of the bearing was hanging out! So not as terminal as thought but still abit of a mess. Should be a reasonably inexpensive and easy fix.
My concern is why or how has this happened as I presume there's minimal load on this drive? Are they prone? Could the bearing of collapsed causing the shaft to snap?...
Any experience shared would be really appreciated

[GMP]

This has happened before. Tough to draw conclusion what failed first, but my bet is the shaft. Inspect your impeller, any indication of it contacting the pump cover? Very poor control of tolerance in this area and a plastic part that has failed in the past.

[Vindicator]

But why this happens when the bike craches to the impeler side ? This is scary...

[justsam]

Cheers Glenn.
Just inspected the cover and yes, it has been rubbing so it may have been just that. I'll get the parts ordered up and see how it looks reassembling.

[rgranger]

2010, just a heads up. if any of those bearings got loose, and you need new gears - you will need a complete set. they changed manufacturers in 2011 and the new parts will not fit the old ones. I have a thread out there detailing my 4 month ordeal. GasGas did eventually step up once we figured out what the issue was (they didn't update part numbers). If you just dinged the bearing - go buy a freaking lotto ticket!!!!

[Vindicator]

Originally Posted by justsam

Cheers Glenn.
Just inspected the cover and yes, it has been rubbing so it may have been just that. I'll get the parts ordered up and see how it looks reassembling.

Could you please post some pics of the impeller and the cover ?

[Vindicator]

Would the impeller be this one :

http://checkpointoff-road.com/store.html



Anyone knows were I can find it in EU ?

[Jakobi]

Thats the aftermarket one I'll be fitting. Checkpoint will ship internationally. I got one sent to Australia. Pretty sure postage was reasonable (both time and cost).

[einsteingarage]

Same thing happened to me but it really did a number on the internals. Same story though. Uphill climb gentle lay over on the right side and whamo! This was on an 06 motor

[einsteingarage]

I did not have a plastic impellor and it wasn't rubbing The failure actually happened at the opposite side of the impellor shaft. That bearing let go or the shaft first then the bearing.