[AT] Gearbox breather plug

[Mike M]

Mark, it's 3/8" pipe thread.

On 6/12/2017 12:03 PM, Mark Greer wrote:
> What thread size is the plug?
> Mark
>
> ----- Original Message -----
> From: Mike M <meulenms at gmx.com>
> To: Antique tractor email discussion group <at at lists.antique-tractor.com>
> Sent: Mon, 12 Jun 2017 11:20:21 -0400 (EDT)
> Subject: Re: [AT] Gearbox breather plug
>
> Thanks Cecil, my plug is a solid plug with no hollow area in it. I'll
> drill it length wise and try the cotter pin idea.
>
> Mike M
>
> ps - tried to reply directly, but your isp doesn't like my email provider:)
>
> On 6/12/2017 8:39 AM, Cecil Bearden wrote:
>> I would drill a 1/8"hole in the plug.  If the plug you have is hollow
>> up  in the square end of the plug, then I would drill the hole
>> sideways.  If not then drill the center nearly to the end, then drill
>> sideways until you intersect your previous hole.  Or drill straight
>> through, install a cotter pin to keep it clear and cover the box when
>> stored..  Weather changes will cause a box to suck oil in at the input
>> shaft.  I also would use corn picker grease  or called 00 grease.
>>
>> Cecil in OKla
>>
>>
>> On 6/11/2017 11:34 PM, Mike M wrote:
>>> Hi all, I have JD 513 rotary mower, and am getting set to cut my fields
>>> while we have a dry spell. When I first bought the mower, the oil was
>>> milky, so I changed it, and it ran fine for the next 3 years. Today, I
>>> checked the oil, and the level was fine, but it was milky again. It's
>>> either been stored under cover, or had a 5 gallon plastic pail over the
>>> gearbox. I noticed one thing in particular tonight, and that is the
>>> gearbox is not vented. Neither the fill or the check plugs have breather
>>> holes in them. I bought this at an auction so the previous history is
>>> unknown, but I was under the impression that all gearboxes needed a way
>>> to vent. I'm not losing oil through any seals at this point, so that is
>>> good. Any thoughts would be appreciated.
>>>
>>> Thanks,
>>> Mike M
>>>
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