Re: Re: The full story on transmission/hydraulic fluid for use in N series tractors

Posted by llamas on March 30, 2000 at 08:49:42 from (192.62.142.21):

In Reply to: Re: The full story on transmission/hydraulic fluid for use in N series tractors posted by mike on March 30, 2000 at 08:17:11:

Sure, the N transmission is vented. Several places. The 9N/2N actually has a sweet little breather hole in the transmission cover, right behind the shift lever. But it'll breathe through the shifter boot, the starter button mechanism (9N/2N only), the touch control and position control lever bushings (as appropriate), the dipstick, the PTO shifter bushing, the lift arm bushings and the top link reaction spring linkage.

Straight mineral oil (GL1) has no additives of any sort. Anything described as "hypoid gear oil" (which would be at least GL3 grade) should have at least some. "Hypoid", incidentally, doesn't refer to the oil, but to the type of gears it's good for - the differential gears in your N, for example. Any "hypoid gear oil" rated GL5 will have some anti-foaming agents in it.

I wouldn't worry about the lack of them in any case. Nothing in the rear end runs fast enough for this to be an issue, and the air space is so huge, and the volume of oil so large, that it's doubtful that you could turn a significant amount of it into foam. The pump is completely submerged, so no problems there. The transmission shouldn't need them either.

llater,

llamas

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