Re: [MV] M816 transfer Case Question

From: Neil E. Amrhein (neil@compu-powr.com)
Date: Thu Jul 24 2003 - 06:29:43 PDT


John,
    I would not bet against the clutch. The load against the clutch in low
range will not be as severe as in high range, so it might not slip in low
range as easily. If something broke in the transfer case, I would expect it
to be sudden and brutal, given the strength of the parts involved. That does
not really sound like the case from what you described.

    --Neil

----- Original Message -----
From: <JHUTT7107@aol.com>
To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
Sent: Thursday, July 24, 2003 9:10 AM
Subject: [MV] M816 transfer Case Question

> List (and especially the guys with the big trucks),
>
> Last weekend I hauled a 155 mm Howitzer from our museum to a show in a
local town, about 25 miles away. On the way back to the museum, I lost high
range in my M816 wrecker. Believe me when I say that pulling a 14,000 pound
gun at 25 miles per hour, on the highway, at 85 degrees, is not an
experience that I would recommend. Had to drive most of the way in low
range. Had to stop twice along the way to get one of our Jeeps re-started
and back on the road. An interesting day!
>
> I had just finished climbing a fairly long hill in town, at about 10 mph
and only turning about 1000 rpm. (I was following another vehicle, and he
kept slowing down.) As I got to the top of the hill, it seemed as if the
clutch had disengaged. The rpms rose, and the vehicle slowed down. I thought
that I had lost the clutch, but that wasn't it. I tried low range, and the
truck moved forward, so I knew that I could, at least, move it. That began
the long drive home.
>
> My question for this learned group is: What happened? Is it likely that
something major broke down inside of the transfer case? Is there some kind
of adjustment that I need to do? I have the 260-34 and 34P. I plan to take
next week off and work on the beast, but any hints or suggestions would be
appreciated. If it should become obvious that the only solution is to
replace the transfer case, does anyone have one available, and what do they
cost? Any and all replies will be appreciated.
>
> Please reply to the list. Not only is this something that others might be
interested in, it makes for a lot less hassle for me with the email system
that I have to work with.
>
> Thanks in advance,
>
> John
>
> --
> John Hutterer
> Senior Engineering Lab Tech
> Deltec Inc.
> Saint Paul, MN
> 651-628-7107
>
>
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