Case 680 won't start

ps66x4 · Sep 26, 2015

Started this on my old thread and now I'm moving it to a new one. I don't know the CCA of the new battery

Since there's been some confusion expressed below about whether this should be in its own thread, or in the original thread about the machine's hydraulic problem, I've copied the post about the starting problem to this thread.

Hopefully that'll get everyone on the same page, figuratively speaking.

Digger242j

ps66x4 said:
The cylinder is on the machine but now it won't start. It has been sitting since the cylinder removed. My brother had the starter rebuilt because he said he burned it out trying to get the machine to run. I was over his place last weekend and tried starting it, disconnected the air filter from the manifold, bleed the new fuel filters he put on since the starter was out, using the manual pump. Wanted to bleed the injectors so I took off some covers off and found some adjusting screws and decided not to touch them without asking here first so I put them back on. It seems to me the starter turns over slow. He uses 1 12v battery and I figure that is what he has used all along so I didn't question it. Could the rebuild-er wire the starter for a 24v and that would cause it to turn slower? Just a thought. Should the machine be 24v all along? When we crank a little vapour does come out the exhaust. We tried ether a couple of time and nothing happened. So we gave up.

Dickjr. · Sep 26, 2015

It won't turn over or just won't start. Is it a newer 680 that uses the 5.9 or what?

ps66x4 · Sep 26, 2015

Dickjr. said:
It won't turn over or just won't start. Is it a newer 680 that uses the 5.9 or what?

It is a 4 cyl and I think it is from the 70's 680ck

Dickjr. · Sep 26, 2015

what is it doing?

ps66x4 · Sep 26, 2015

cranking over but wont start not even with a little either

Dickjr. · Sep 26, 2015

Have you had it running , if so you more than likely have a fuel problem. Either you have a blockage in the line or the kill lever on the pump is engaged. Was it running before?

ps66x4 · Sep 26, 2015

It was running but the boom cyl leaked so bad that my brother removed the cyl to get fixed. I fixed the cyl with help from some members on here. When he got it back together It would not start. It hasn't run in well over a year maybe two, I don't know for sure.

Tinkerer · Sep 26, 2015

You aren't helping your cause by starting a new thread. That makes it hard to follow your progress and help you.

ps66x4 · Sep 26, 2015

I may have misunderstood someone stated I should start a new tread.

digger242j · Sep 26, 2015

I may have misunderstood someone stated I should start a new tread.

Not a big deal. I've edited the opening post to help clarify.

ps66x4 · Sep 26, 2015

digger242j said:
Not a big deal. I've edited the opening post to help clarify.

Thank you

Tinkerer · Sep 26, 2015

Thanks Digger !

lantraxco · Sep 26, 2015

What you removed from the injectors sounds like the return fittings, thanks for not messing with the injector popoff settings, if you had it would be time to pull them and have an injection shop reset them.

The steel lines from the injection pump going into the side of the injector body, loosen the tube nut on each one about a turn, and then crank it, see if you get some fuel there. Do NOT put your hand near these lines when cranking, diesel under the skin is an emergency room visit at least!

If you don't get any fuel or at least air bubbles there, then the problem is probably injection pump shutoff or something internal to the pump.

Tinkerer · Sep 26, 2015

ps66x4 said:
It is a 4 cyl and I think it is from the 70's 680ck

Up to 1974 it would have a Case 301cubic inch diesel. In 1975 The 680E series came out and had a Case 336 cubic inch diesel.
The Bosch injector pumps have a manual priming pump on them.

Delmer · Sep 26, 2015

https://www.heavyequipmentforums.com/showthread.php?39679-Hello/page2

Here's the other thread. The questions from 2 YEARS AGO have been answered. I did a similar one today, replied to a question on the last post of page 1 only to see later that it had already been answered on page 2.

I didn't realize this was a 680, and everybody takes a different angle on this one. The more eyes the better sometimes, and sometimes too many chefs spoil the soup.

Tinkerer · Sep 27, 2015

ps66x4; You should be getting a really good flow of fuel out of the filter bleeders (#8 in the diagram) with just the key on and the electric lift pump running. Do you ?

96_Bear · Sep 27, 2015

Even with my pump being out 31 degree's my would fire and run with ether. I wonder if since it did sit so long if mice didn't build a nest inside air cleaner or intake manifold. I had to remove mine and get a nest out of it before I fired it up.

Tinkerer · Sep 29, 2015

Also be very certain that the "O" ring (#7) is on the stem of the primary filter mount.

zbo2 · Sep 29, 2015

pull a valve cover and make sure the cam isn't broken and that all the valves are operating......

Dubin · Feb 1, 2020

I’ve read through the post and needs some additional help. I have a case trencher 360. I bought it not running
I put new fuel. Installed a new fuel filter and cleaned out the fuel bowl screen. Bled the fuel so that fuel squirts out of the injectors. Tighten everything back up. It tries to start, and even run for about a minute, then dies. Bled the system again. Still same issue. Pulled the injectors and hooked it up outside the cylinder and made sure it was getting a decent spray pattern. What am I missing ?
Thanks

Case 680 won't start

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