From: Ken Boge (ken@clovermachine.com)
Date: Fri Apr 26 2002 - 14:04:56 PDT
In response to David Cole's posting:
The last jug of gear oil I bought (Sta-Lube Multi-Purpose Hypoid SAE 85W90
Gear Oil API/GL-4) says on the label:
- Contains anti-wear and extreme pressure properties
- Protects against oxidation, rust, corrosion and foaming
- Not corrosive to copper; bronze or other non-ferrous alloy bearings and
bushings
The shop manual for my friends '63 Chevy p/u says do not use gear oil with
EP additives in the transmission because of the corrosive effects on copper
and bronze.
I suspect that in the years hence, the formulations have changed so they are
no longer corrosive. But that is the reason some people will tell you not
to use EP gear oil in gear boxes with bronze or copper components. This is
probably outdated advice but who knows whats in there--check the label.
Also, I don't want to get hung up on semantics but a worm drive set consists
of a worm and a worm gear.
The worm is hardened steel and the worm gear is bronze like you say. I
didn't mean to imply they were both made from the same material.
Ken
----- Original Message -----
From: "Dave Cole" <DavidCole@tk7.net>
To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
Sent: Friday, April 26, 2002 9:10 AM
Subject: Re: [MV] M35A2 winch gear oil
> That doesn't make a lot of sense though since Bronze or brass is often
used for synchonizers and bushings in tranmissions.
>
> Just about all worm gear boxes I have ever seen have always used steel for
the worm and bronze for the gear.
>
> Personally I'd use 90W-140 EP gear oil in the winch. Unless of course you
plan on doing winching in subzero temps.
>
>
> Dave
>
> >>>>>>>>>>>>>>>
>
> 4/26/2002 10:07:20 AM, "Ken Boge" <ken@clovermachine.com> wrote:
>
> >Worm gears are usually made of bronze. Some EP additives use sulfur
which
> >will attack bronze. It's best to read the label to see if the gear oil
is
> >compatible with this metal.
> >
> >Ken
> >
> >
> >----- Original Message -----
> >From: "mydogexcitesme@times" <tomb@carr.org>
> >To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
> >Sent: Thursday, April 25, 2002 11:24 AM
> >Subject: Re: [MV] M35A2 winch gear oil
> >
> >
> >> i also have to question dave's advice. he may have had a winch that
> >> someone put grease into or some other issue ? EP gear oils should work
> >> in anything calling for GO and the winch calls for the same oil as the
> >> trans and rears which would certainly be EP. i have had EP 90 in my
> >> winch for many years and it still looks just like GO.
> >> tom
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