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oil leak on crankside of 6x4 gator
Hi there,
been through this exact same scenario. You will need to replace the seal, and also the main bearing.
You should download the tech. manual TM1518
http://rapidshare.com/files/338458124/Gator_Utility_Vehicles_4x2_And_4x6-TM1518.pdf
You will see that there is nowhere else for oil to be leaking from. However, pay attention to the breather valve in the top of the engine - it is suppposed to maintain a vacuum in the crankcase which helps keep the oil in. You should probably check it out before you do anything else just to make sure it isn't broken.
The engine in my Gator had done 2100 hours when I acquired it (seized).
Since I was going to the trouble of dismantling it anyway, I decided to replace the rings and all the seals and gaskets. (The big ends were in good condition, so I left them alone).
The total cost of rebuilding the engine was around 800 New Zealand dollars, with the gaskets being the bulk of it. Next time around, I'd shop around rather than buying the parts through John Deere. The only part of the engine that is specific to John Deere is the crankshaft.
Good luck with it.
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oil leak on crankside of 6x4 gator
You will have to remove the crankshaft to do the job, so yes you will be removing the cover, water pump, big ends, etc. You will (probably) need new gaskets. Whether or not the main bearing is damaged you will see once the crankshaft is out.
The main bearing is just a bush which is pressed in. You might need to take the engine to a machine shop to get the old bush pressed out and new one replaced.
Don't be dismissive about the tech. manual - it is the Bible when it comes to Gator maintenance! Provided you follow the manual EXACTLY you shouldn't have any problems.
I'd suggest you read the appropriate section(s) a couple of times before you start and print off the page about the order of insertion of the crankcase bolts and their torque settings. Likewise, the torque settings for the big ends.
Don't forget to check the oil breather. You'll probably need a new gasket here also.
Cheers
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