From: Bruce C. Beattie (bruce@eecs.berkeley.edu)
Date: Mon May 08 2006 - 09:26:44 PDT
Hi All,
In my haste to post last night I left out a comment that Kevin made,
and in view of Fred's comment, I
figured that I should add this.
His comment was to not bother removing the existing lube oil, but to
just put a grease fitting on and
start filling it up with grease. Sot the correct solution seems to be a
mix of the two.
My apologies for leaving this out before.
Bruce MVPA 23824
Fred Martin wrote:
> 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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