From: Chris Brunner (cjbrunner@optonline.net)
Date: Mon Mar 20 2006 - 09:47:52 PST
I use the small relay under the dash to throw a larger relay (200+ amp
contactor actually from a Cat Dozer). It's a 24V relay that I picked up
from the truck shop with an amazing surge capacity and good hold
capacity. I pulled the trigger wire for the starter and just used it to
trigger the big contactor. Now I know this relay is amazingly oversize
for it's job (since it's only supposed to deal with 12 - 20 amps) but I
figured better safe than sorry.
Now for the cable that runs to the starter I installed a knife switch on
it up by the bus bars. I've had that cable rub itself clean twice now
(in different places) and I got tired of dealing with all the sparks and
smoke, so now I can at least disconnect it when that happens to keep
from setting the truck on fire.
Chris
m2116x6@comcast.net wrote:
>I've had that relay weld itself on my M1009 as well. Fried the starter. Another time it shorted while driving down the road, causing the starter to engage and strip the ring gear clean.
>
>Until I find a relay I can trust, I'm using a momentary toggle switch with two short wires into the relay connector under the dash.
>
>On top of those problems, once a month or so my starter would hang up and blow the relay. The toggle switch eliminates all of the above problems. Just turn the key to the "On" position and hit the toggle switch to start it.
>
>I would rather have it original but have been through everything twice trying to find the hanging up problem with no luck so far.
>
>Jim
>
>
> -------------- Original message ----------------------
>From: "Chance Wolf" <bigbadwolf@telus.net>
>
>
>>----- Original Message -----
>>From: "Sean Nichols" <armytrucks@gmail.com>
>>To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
>>Sent: Monday, March 20, 2006 8:26 AM
>>Subject: Re: [MV] M1009 CUCV problem
>>
>>
>>
>>
>>>OK, so here's a question related to this failure:
>>>
>>>
>>>Given the possibility of this happening, would it be wise or at least
>>>make sense to put some sort of fusable link inline between the starter
>>>and the battery? Seems like it would be cheap insurance if something
>>>like that happened.
>>>
>>>
>>>Armchair CUCV electrical engineers what say you?
>>>
>>>
>>That relay's welded itself closed twice on my own M1009; failed open once on
>>my M1009, and welded itself closed on one or two of the ones at work. Also
>>had one GSA truck declared surplus to requirements because "the starter was
>>stuck" which also proved to be that $%&*#@ relay. Always the relay. As has
>>been discussed on the list before, the early ones evidently failed like that
>>and were replaced by the same type but upgraded in some fashion or other.
>>I've disassembled the failed ones to see what went south and thought them
>>very, very underbuilt for the job they're doing, hence the arcing and
>>eventual arc-welding together. I just installed a ridiculously overbuilt
>>generic relay (glow plug or starter - forget which) in my own truck and
>>mounted it under the dashboard to have done with the whole problem.
>>
>>I was thinking of hooking up a manual disconnect either at the input or
>>output side of the relay 'just in case' it ever happens again. Last time
>>around I was in the McD's drive-thru and had shut the engine off so I could
>>here the Charlie Brown Teacher voice come through the drive-thru speaker,
>>and when I went to restart, the relay jammed on and the engine caught at the
>>same time. I just idled it off into their parking-lot and disconnected the
>>battery. Unfortunately that smoked either a fusible link or one of the
>>alternators (forget which) in the bargain, though the starter itself lived
>>on to start another day.
>>
>>(The Fire Dept. guy we got the GSA truck off of was just amazed when we went
>>straight for the relay, yanked it, then started the truck right up using a
>>jumper wire I keep around for the purpose! Something like two minutes flat.
>>Ah well, they can always go draw another one from Dr. MO whenever they want,
>>I suppose, so no skin off their noses.)
>>
>>
>>
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>>
>>
>
>
>
>===Mil-Veh is a member-supported mailing list===
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>
>
>
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