70D

[J Roland Kinsey]

My neighbor tells a story about another old farmer friend of ours that owned a 70D rowcrop. He says that when working the 70D daily, at the end of the day he would have to take oil out of the cranking engine crankcase with a turkey baster because it somehow worked it's way there from the main engine. Fact or baloney? Is this any way possible?

 

[Mike M]

Would not surprise me. Those 2cyl. diesels are masters at mixing fluids ! I'm betting they helped promote the design of the new generation where one oil did it all.

 

[James Howell]

"[b:654c4848f0][i:654c4848f0]Is this any way possible?[/i:654c4848f0][/b:654c4848f0]"

Take a look at the diagram below.

Note the O-ring (Key 17) and the Oil drain plug (Key 18).

The operator's manual recommends loosening the screw and pulling it out as far as possible to drain the oil into the diesel engine crankcase before draining the diesel engine oil.

Presuming that the oil drain plug is the only oil "connection" between the cranking engine and diesel engine, it would be difficult for oil from the diesel engine crankcase to over-fill the starting engine crankcase through the oil drain plug.

That does not rule out any other "unknown" sources of diesel engine crankcase oil.

Hope this helps.

 

[Mike M]

I'd sooner think gas was getting into the pony crankcase overfilling it.
The diesel engines breather is thru the pony so maybe it is possible to have bad enough blow by to blow some up into there ?

 

[Blksmok]

The diesel engine crankcase vents around the drain plug for the pony engine. The vapors travel up the timing gear cover and into the pony engine. It should travel up to the pony engine and into the carburetor air cleaner. If the pony engine is not running it's most likely the diesel crankcase vapors could condense in the pony engine and end up in the pony engine crankcase.

 

[Leroy Cochran]

I have a 720 diesel that does the same thing. I drain the pony motor back into the main motor after each time I use it.