From: V SCHWARTZ (vsaws@optonline.net)
Date: Mon Apr 24 2006 - 16:16:50 PDT
I had a simular problem with my M816. It was hard to start and would stall
out right away. I got a lot of help from the guys on this list. What finaly
solved the problem which was air in the fuel system. First I disassembled
the switch for the dual tanks and cleaned the valve ( simple valve) Just
watch how you take it apart. PUT IT BACK JUST THE WAY YOU YOU FOUND IT. I
then replaced the rubber hoses that connect to the fuel lines. It still
sucked air and liked to drive me nuts. I finally put hose clamps on each end
of the hoses, and tourked them down real good. I have no problems since.
Starts right up every time. In the extreme cold, I use the preheater and
prime the intake , as per instructions for cold weather but I have not had
to use etherall winter. No soligizer on the batteries either. Vinny
----- Original Message -----
From: "MV" <MV@dc9.tzo.com>
To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
Sent: Monday, April 24, 2006 3:21 PM
Subject: Re: [MV] Cummins NHC 250 / 855 CI diesel as in the M800 series of 5
tons
> Good idea, I'll take a look at that.
>
> Thanks,
>
> Dave
>
> Hutterer, John (MPAU) wrote:
>>
>> Dave,
>>
>> I have an NHC 250 in my M816 wrecker. It has the glow plug and spray
>> nozzle arrangement. I was having trouble getting it to start. I figured
>> that it was because I didn't use it all that often. Had to use ether to
>> start it every time. One day, it wouldn't start at all. No way, no how.
>> It turned out that the fuel shut-off solenoid actuated valve had finally
>> quit on me. It could be by-passed by turning the little knurled knob on
>> it, but that was also how you had to shut the engine off, afterward. You
>> could look and see if your engine has this knob on the shut off
>> solenoid. If it does, try using it to bypass the solenoid first thing in
>> the morning. If the engine fires right up, your shut-off solenoid is
>> probably going bad. Worth a try, and easy too.
>>
>> John
>>
>>
>> -----Original Message-----
>> From: Military Vehicles Mailing List [mailto:mil-veh@mil-veh.org] On
>> Behalf Of MV
>> Sent: Monday, April 24, 2006 1:11 PM
>> To: Military Vehicles Mailing List
>> Subject: [MV] Cummins NHC 250 / 855 CI diesel as in the M800 series of 5
>> tons
>>
>>
>> Guys,
>>
>> I have an NHC 250 engine in a civilian truck - it requires either to get
>> it started even when it is warm outside. It does not have glow plugs.
>>
>> It had an ether quick start kit installed on it when I got it. The
>> military NHC 250s seem to have a preheater installed on them with a glow
>> plug and a spray nozzle of some sort in the intake manifold.
>>
>> Is it normal to have to ether these engines even when it is warm outside
>> - like 70 degrees? Once I get the engine running - even if I shut it
>> off for a couple of hours - it will easily restart. But ether is
>> required the first time each day. Not a lot, just a one second spray in
>> the top of the stack.
>>
>> The engine runs well - no smoking at all. And that is without a turbo.
>>
>> Dave
>>
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