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Re: UPDATE.............Still leaks

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Owen Aaland

02-28-2008 16:03:20

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There are only two places where you can get fuel into the crankcase on the 806. Either it has to come past the shaft seal or from unburned fuel from the injectors. If you got two additional inches in the crankcase in a half hour of running it is highly unlikely that faulty injectors are the problem. You would surely notice poor starting and excessive smoke if they were that bad. That leaves the shaft seal and pump adapter for the leak.

There is no seal inside the pump. The only seal for the fuel is the rear seal in the adapter housing. The side of the seal with the spring in the lip must face the pump. The front seal is installed with the lip forward and it is there to seal oil from getting into the pump. If the front seal were to be installed backwards it is unlikely that oil would actually leak into the pump since the fuel in the pump is under a slight pressure.

It is possible though unlikely that a porous housing is the cause. A defective housing would usually leak long before this. More likely causes would be a damaged seal, a seal installed backwards, a housing damaged when removing the old seal, or damage to the shaft.

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mhalter

03-01-2008 17:08:27

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Re: UPDATE.............Still leaks in reply to Owen Aaland, 02-28-2008 16:03:20

Well I THINK I have this one fixed now. Thank you Owen, Weldon, KB 826, and everyone else who chimed in. I took the adapter housing back off, took the new seals out and discovered a small scratch in the housing where the seals are installed. I guess I scratched it removing the old seals before (soft metal in there!). Installed another set of new seals with sealant around the outer edges of the seals, run it for awhile, and so far I don't think its leaking fuel into the crankcase anymore. I'm going to use it this week to run an auger loading corn out of a bin, so I'll know more by the time thats done. Again, thanks guys!

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