From: chance wolf (chance_wolf@shaw.ca)
Date: Sun Apr 18 2004 - 21:45:18 PDT
----- Original Message -----
From: "Greg Anderson" <glanderson@alltel.net>
To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
Sent: Sunday, April 18, 2004 7:48 PM
Subject: [MV] M816 clutch parts
> Hey guys.I lost half of the pedal on my M816 wrecker.The throw-out bearing
> was making a little noise.Anybody have any parts or know of a good
source?I
> don't know if it is the bearing,pressure plate or the fork that is at
> fault.I just wanted to get a heads up on parts before I tear the beast
> out.Thanks,Greg
I have two M813s doing exactly the same thing more or less intermittently.
I haven't looked into it, but thought it might be unevenly adjusted
pressure-plate release levers or something. Sometimes it grabs 1/2 an inch
off the floor or thereabouts, and sometimes it operates flawlessly. I had
an M54 like that which I *did* look into, and found that the lowest-bidder
clutch disk - still pretty new looking - had chucked a few of its rivets,
broken apart - and had the random broken pieces floating around to jam in
various spots causing random pedal "feel". The replacement disk I got from
either locally or Antelope Valley looked a bit hardier than the shattered
one which came out, so I don't know if Canada bought a bad run of them or
what. (Both the 813's I talked about are also ex-Canadian trucks, so the
clutch disks might likewise be suffering from Made in Quebec syndrome.)
I did find something interesting on our 816 which wrote off the clutch disk.
If you go underneath and look at the actual clutch linkage, follow it
through to the other side of the bell housing and you'll see the
engage/disengage operating lever which is operated by the valve on the back
deck. With ours, the stupid operating rod had been adjusted so that the
clutch as operated by the driver never fully released all the way, and as a
result the clutch disk 'sandpapered' the flywheel in a sort of
half-engaged/half-disengaged mode until the disk wore out over after x-miles
accumulated. The way I set it up after replacing the clutch was to set the
free travel on the driver-operated clutch pedal so I knew the clutch was
fully released, and *then* went and set up the back-deck clutch operating
rod so it too had convincing free travel. God knows how the Air Force mechs
set the thing up before we got the truck, but it must've been a playoff
Friday or something.
(Or they were distracted by a shiny object...)
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