[AT] Gearbox breather plug

[Mark Greer]

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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