greeneman

Hey Ya'll,

Heres maybe a mystery with hopefully not a bad outcome but it is possibly looking that way.. 92 3/4 ton automatic stopped suddenly; engine has 176,000 on it. Truck looks like it has 500,000 ;~) Changed fuel filter, changed connections on fss, has 12 volts going to it… changed starter cause it was turning really hard; one crank and thats it.. put new starter in and got two or three before quit.. changed oil, no metal in pan.. lift pump was recently replaced and new fuel filter pumped full.. diaphragm looks good on IP. Worst is it wouldn't start on ether with jumper cables off a duel battery diesel sprayed directly into intake.. IF it is internal (?) what possibly may have happened ? it was running like a top when it just quit… regular maintenance performed religiously… thanks for any input...

patdaly

Dumb question, have you removed the serpentine belt and tried to start it?

Honest to God, a couple of years ago my Greenie was idling and just went to a dead stop, the same sinking feeling you have, oh boy is this gonna get expensive.

on mine, the Alternator had seized up and killed it dead in its tracks, would barely crank over with a good starter and hot batteries.

Popped the belt, started right up, found the Alt. locked, replaced it and good since.

Worth looking at.....

oliver foster

Try changing or gutting the FSS next.

patdaly

Oliver, the way I read it he says it will barely crank over, like it is seized up.

OP, did I read that wrong?

oliver foster

Now that I re-read it... Barely turning over, does sound like the major problem at hand. My bad on the FSS info. then.

gyman98

Could still be a seized accessory component like the alternator. What about kdp failure? Torque converter seized up? Had that happen on a mini van once

maybe368

Jumper cables are not very reliable. How many volts does the battery have at rest? If around 13, that is good. Then leave the meter on it and try to start it, if it drops to 8 or 9. you have a bad battery. Don't discount the possibility of a bad starter out of the box. Do you have a barring tool? If so, try turning it over by barring it just to eliminate the engine mechanicals. It takes a ton of ooomph to start these trucks, especially in cold weather, I would eliminate that as a problem first...Mark sorry gyman, I quoted the wrong post...

greeneman

Thanks for all your input fella's I should of tried removing serpentine belt. I gave up and had it towed to williams brothers in Show Low AZ here.. I recently replaced alternator… but you never know. The 92 just came with one battery which was new and I had it charged the day I was tinkering… Gonna have to set up a duel battery on it.. I'm waiting to hear verdict from shop and will post what the culprit is..

thrashingcows

Never thought about the accessories seizing up and stopping the motor....that is a good piece of info to store in the back of the old grey matter. My thoughts was the KDP or case bolts perhaps....something in the gear train.

But as Maybe368 mentioned turning it over by hand will let you know if it's a mechanical issue, or a air/fuel/electrical etc issue.

patdaly

Neither did I until it happened.

Talk about a sinking feeling as it just stops dead............

patdaly

OP, let us know what they find, always good to close the loop and add to the knowledge base here.

j_martin

It should crank fine with a group 31 battery in good shape. You don't need 2.

I went over to help a friend with his Ferd diesel that wouldn't start. Sounded like it wanted to. I noticed his serp belt was hot. Yep, the whole problem was a frozen power steering pump.

deere country

I would agree with the one battery. The only reason you would need 2 is if your starter cables aren't doing their job or you have to heavy of an oil in for the outside temp. This is accurate with the ve injection pump and the cold timing advance they use. With a p-pump engine I can see why they want 2 batteries as they don't start nearly as well as the rotary pump engines do.

maybe368

I have 2, but the second one has nothing to do with starting the truck. It only runs my winch and my ac power inverter. It is charged by the alternator through a battery isolator...Mark

Blue Goose

hard to believe a seized alt will stop a Cummins. I've had them seize on gassers and the engine keeps going. why would it stop a diesel?