Sure can as I remember that was what it really was for
Carl
----- Original Message -----
From: "Auke Dijkstra" <auke.dijkstra@wxs.nl>
To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
Sent: Friday, March 30, 2001 12:57 PM
Subject: Re: [MV] runaways
> Hi All,
>
> I have (beside my MV's) a '55 Peterbilt conventional with a Cummins NH220
> diesel
> engine. This engine has a decompression handle, it can be used when
starting
> the engine.
> Just pull the handle while cranking the starter engine, so the starter
> engine has an easy job.
> After a few turns you can pull the handle back and the engine fires up.
> Could this decompression handle be used against a runaway of the engine??,
> In theory
> the handle takes the compression off the engine.
>
> Thanks!
>
> Auke Dijkstra
> Netherlands
>
> -----Oorspronkelijk bericht-----
> Van: DDoyle9570@aol.com <DDoyle9570@aol.com>
> Aan: Military Vehicles Mailing List <mil-veh@mil-veh.org>
> Datum: vrijdag 30 maart 2001 3:51
> Onderwerp: Re: [MV] runaways
>
>
> >While on the subject of runaways, there is something that has been
> >missed....I am telling this from memory, not the manual, so, while the
> >principle is correct, the numbers may not be exact.
> >The military multifuel engine is governed to 2800 RPM (could be 2600,
again
> >this is from memory), ASSUMING the governor is working correctly, the
> >injection pump will not pump enough fuel to blow the engine up,
REGARDLESS
> of
> >the throttle setting. In fact, either the injector or engine manual tell
> you
> >top operate the engine at full throttle with no load for so many minutes
as
> >part of the break in procedure.
> >Now, if the governor section of the injection pump has failed, you can
blow
> >the engine up, even if the throttle works properly, simply by mashing the
> gas
> >too far.
> >As some one else has already mentioned, the most likely way to blow the
> >engine up is by introducing fuel from a source OTHER than the injection
> pump.
> > Crankcase oil is the most likely source of this outside fuel. When
faced
> >with this situation there is NOTHING you can do to the fuel system to
shut
> >the engine down, as the fuel causing the runaway is not going through the
> >injection pump or any other part of the fuel system. The only practical
> way
> >to shut it down is shut off the air. (you MAY be able to choke the truck
> >down by putting it in high gear, high range and releasing the clutch)
One
> >way to shut off the air is by slapping a board over the air intake(s),
> >another way is to discharge a 15 pound CO2 fire extinguisher into the air
> >intake. The key under either method is that the engine MUST completely
> stop
> >revolving. If you run out of CO2 before it quits turning, or move the
> board
> >it will start all over again.
> >Hope this helps,
> >David
> >
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>
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This archive was generated by hypermail 2b29 : Wed Apr 04 2001 - 08:10:49 PDT