----- Original Message -----
From: "Winget, Adrian JTFCS5G" <winget@jwfc.jfcom.mil>
To: <truks@cs.quik.com>
Sent: Tuesday, December 05, 2000 9:02 AM
Subject: Glow plug Controller Cards change
> I couldn't post it to the Mil Web, but perhaps you can. WAW
>
> > For all you HUMVEE owners (maybe deals with the older CUCV's performance
> > as well.)
> >
> > Taken FROM the Chem Bio Quarterly March 2000
> >
> > Change to the Glow plug Controller Cards (as the glow plug problems had
> > been posted rather extensively on Mil Veh digest #70-90 series):
> >
> > TACOM Control No. MAM-00-003
> > For all M998 series High Mobility Multipurpose Wheeled Vehicles (HMMWV)
> > 1. Distribution: This is a "Maintenance Advisory Message." Request TACOM
> > Commanders retransmit
> > this message to all subordinate commands/activities.
> > 2. Issue: The Glow Plug Controller (GPC) NSN 2920-01-175-7214 is
improved
> > by the addition of a
> > voltage compensating feature that prevents early glow plug failure.
GPC's
> > with this feature can be identified
> > by the gray colored connector and the serial number 451972 and higher.
> > 3. A previous message instructed personnel to replace the protective
> > control box (PCB) with a
> > distribution box if the GPC failed. Disregard that information and
> > discontinue any such practice. Changes
> > have been incorporated into the GPC that change the way it functions.
The
> > changes allow the GPC to sense
> > available voltage and adjust glow plug on time accordingly. A time out
> > feature was also added to prevent
> > reenergizing the preglow cycle before the glow plugs have sufficient
time
> > to cool. Incorporating these two
> > features has extended glow plug life.
> > 4. GPC's that have the new features can be readily identified by the
gray
> > color of the electrical connector
> > and/or the serial number 451972 or higher on the manufacturers label. In
> > preparation for the upcoming winter,
> > units that normally experience high usage of glow lugs, are strongly
> > encouraged to replace the GPC with a
> > voltage sensitive GPC.
> > 5. User actions: maintenance personnel are reminded to perform glow plug
> > troubleshooting whenever
> > a vehicle is reported to run rough at cold idle, have excessive black
> > smoke when cold, or hard starting. If
> > troubleshooting indicates failure of the GPC then replace the GPC rather
> > than the PCB and or other
> > serviceable component.
> > 6. Unit commanders, contact your local TACOM Logistics Assistance
> > Representative (lar) or your state
> > Surface Maintenance Manager upon receipt of this message for assistance.
> > 7. TACOM/PM Actions: The technical manuals currently contain adequate
> > troubleshooting and
> > maintenance instruction. The NSN for the controller has not changed;
> > however, the connector color was
> > changed to gray for identification of the voltage sensitive controller.
> > 8. Supply Status: Currently adequate stock of the controller is
available
> > to support the HMMWV fleet
> > through March 2000 and a follow on buy is in progress to provide support
> > through the calendar year.
> >
> > Hope it helps someone with a nagging glow plug problem.
> > Regards WAW
>
>
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