From: Fred Martin (mung@in-touch.net)
Date: Mon May 08 2006 - 07:43:44 PDT
Everette wrote:
> just a thought on lube for winch gear box,
>
> I come from farm background and we (John Deere dealership) used
> "cotton picker spindle grease" in gearboxes of brush cutters that were
> prone to leak gear oil - these machines have gear box driven by
> driveshaft from rear of farm tractor, and typically have heavy cutter
> blade on output shaft, the grease is light weight and designed to
> lubricate gear box on cotton picker heads - hot, dirty, heavy service
> - should do a good job on winch gear box
>
> E
> ----- Original Message ----- From: "Bruce C. Beattie"
> <bruce@EECS.Berkeley.EDU>
> To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
> Sent: Monday, May 08, 2006 12:46 AM
> Subject: [MV] Winch Tip
>
>
>> Hi List,
>> I learned a usefull tip from Kevin Strain today concerning winches.
>> For some reason the military speced gear oil for the winches, and
>> along with the gear oil comes
>> drips of gear oil as one would expect.
>> The trick is to put a grease fittin on the winch and fill it full
>> of grease.
>> No more leaks and performance is the same.
>> Bruce MVPA 23824
>>
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>
>
>
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>
> Everette.....It is my understanding that a winch has a (usually)
> bronze worm gear and a steel worm....and there is a lot of heat
> involved as there is a high reduction ratio...2/3/400 to one or
> similar. If the gear has grease on it and wipes the grease off on a
> trip around (revolution) then the worm and gear would not have
> lubrication for the next trip around. I'm thinking that this would be
> okay for a regular gearbox but not for a worm and worm gear. I would
> think it would need something like 140 wt. EP (extreme pressure) gear
> lube that should be filled enough to keep the lower half of the worm
> gear running in it to relubricate it (and remove heat) for the next
> revolution. Now I'm not an expert on this subject but with 3 or 4
> teeth in contact at any given time pulling a load of several tons, you
> need good lubrication. I'm thinking that if I were in this situation
> of a leaking seal.....I would use your method only with just enough
> grease to thicken up the viscosity enough to keep it from leaking.
> Just my 02 cents....respectfully, Fred Martin
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