580ck 188d no rpm under load

chevman723 · Nov 14, 2015

I had changed the fuel filter and cleaned the screen in the inlet of the pump after this issue started. It didn't make a bit if difference. I'll try and crack the injector lines and let you know what I find.

chevman723 · Nov 14, 2015

I had two injectors that did not make a difference at all when I cracked them loose. The very first one and the last one I cracked made the engine die, the other two did not make a difference.

Delmer · Nov 14, 2015

A head gasket blown between the two middle cylinders would kill your power like this. If you pull the center injectors, do a compression test, or just blow compressed air into the one and see if it comes out the other hole.

thepumpguysc · Nov 14, 2015

Do as Delmer says>> cuz it's not likely the pump is causing it to miss on 2 cylinders.. the pump has 1 rotating pumping unit that feeds all cylinders equally..
Your going to need to pull the injectors to get the proper P# anyway.. the # is stamped on the body..
DONT just replace 2.. if you find its not a head gasket..

chevman723 · Nov 15, 2015

I really don't think it is the pump. I do think it is injectors. I will be giving the motor a compression test just for my own sanity and I will do as delmer says while I have the injectors out.

melben · Nov 15, 2015

Just for kicks pull the valve cover and see if all the pushrods are in place, that will kill the power and the unburnt fuel will go past the rings, from my experience about a gallon a day. In my career I have seen that frequently, usually in winter after someone gives it a wiff of ether, just another thing easy to check, Mel

Delmer · Nov 15, 2015

melben said:
that will kill the power

And not affect the compression, and most of us would never think to check the valves.

chevman723 · Feb 10, 2016

Ok guys, the snow is gone and I am back working on my backhoe. I replaced my injectors and now it won't start at all. I bled the fuel system at the injectors. It doesn't seem that my pump is putting out much fuel. With the line completely off the injector it barely drips fuel. This goes for all injectors. I was thinking that the pump isn't putting out enough pressure to crack the new injectors.

I haven't been able to get my hands on a compression adapter yet, But will have one soon.

onemank6 · Feb 10, 2016

chevman723 I am following your thread i have a 1970 580ck i am curious to see what you come up with on yours hopefully its not to serious...I am wondering where you are getting your adapter to check compression on these diesels i have a compression tester for gas engines what does the one for diesel look like, is it just a adapter you can buy that fits the gas tester or do you need a whole other tester????

chevman723 · Feb 10, 2016

Xpackdeals I ordered the adapter last night from autotoolworld.com. Item # Sg35300.I am unsure if it will fit my compression tester or not. I will have to get one that is compatible if it doesn't work with my gas engine one.

diver · Feb 10, 2016

im following as well. Cant wait till you find the problem
diver

onemank6 · Feb 10, 2016

chevman723 said:
Xpackdeals I ordered the adapter last night from autotoolworld.com. Item # Sg35300.I am unsure if it will fit my compression tester or not. I will have to get one that is compatible if it doesn't work with my gas engine one.

Cool i have that one saved now, heres a pic of my tester does yours look similar if so can you let me know when you get your adapter in if it fits as i think i will order one for down the road right now mine is running fine but it would be nice to have one of those testers for a rainy day

I dont know a heck of a lot about these diesels right now but i just did a pretty good size teardown on mine this winter which is more related to the shuttle and torque converter mine was leaking shuttle oil between the bell housing and the engine and a bunch of other stuff the only thing i really did to the engine was adjust the valves and pumpguysc schooled me on a busted throttle shaft in the pump...If you find out your problem is in the pump pumpguy is the man just make sure you follow what he says and you will come out on top he is very helpfull and just plain smart with these....
Also if you need a great place to get parts for this old girl I use Dale at tractorstuff, www.e-backhoeparts.com 765-378-3396 Dale is awesome to deal with and he ships right to your house and the guy knows his stuff with these old girls....
Take care and thanks.......

thepumpguysc · Feb 10, 2016

You HAVE TO have a guage that goes beyond 400 psi.. A gas tester WILL BLOW-UP in your face.!!!
For a diesel to have compression ignition the compression has to be 300psi or greater..
Most diesel engines are speced at 400+..
To find the correct adaptor, just google, pencil injector compression adaptor.. and pick the one for a case engine..
Harbor freight sells 2 compression kits for a diesel engine.. 1 basic and 1 master.. they aren't that expensive..
For what you'll spend on it, you can easily resell it.. heck, check ebay..

onemank6 · Feb 10, 2016

pumpguy thanks for the info i had no idea, i have worked on gas engines for a long time but have never worked on diesels i try to read a lot on these 188's so i can get familiar with them just in case i have to tear into mine someday like they say knowledge is king....Thanks again

chevman723 · Feb 10, 2016

Yes I know that your standard auto compression guage is not the correct one for a diesel. I can't recall if mine is a diesel gauge or auto gauge. It's been years since I used it last.

I pulled the valve cover tonight to make sure all of the rocker arms and pushrods were adjusted correctly and all seems ok.

I will give it a compression test when I get my adapter. Then I should have a much better idea of where I'm at.

Pumpguy, should my fuel be squirting out or dribbling out of my fuel line at the injector when cracked?

thepumpguysc · Feb 11, 2016

Squirting.. A fully charged battery is key.. The s/o lever has to be fully open and the throttle in the wide open position..
Personally I like to have another person to help..
I disconnect ALL the linkage, s/off and throttle.. then I loosen the injector lines AT THE INJECTORS just a few turns..
Then while a helper spins the engine.. I make sure the s/off if out of the way and I hold the throttle wide open by hand.. and watch for the fuel to be delivered thru the inj. lines..
Once the fuel is there and theres no air.. I tighten the lines and proceed to control the rpms by hand.. checking for correct idle, full rpms and no leaks..
Once that's done.. shut it down..hook up the linkage and MAKE SURE you get full travel when your using your foot and hand controls.. and adjust accordingly..

ITAMECH61 · Feb 12, 2016

HI chevman723 and other test that you can do untyl you expect the compression gauge adapter is check the injectors one by one, withdrawn all the injectors and injectors line. take one injector line and put it in the injection pump take and injector and twist it turn the engine by starter and purge the injector line than is conected be careful whit your eyes and look as the injector sprayed, repeat this for the others injectors and the others point of injection on the pump. whiy this metod you have and relative idea of the state to the injection sistem good luck.

chevman723 · Mar 18, 2016

Well I finally got my adapter and compression tester. I pulled all of the injectors. #1 did not move the needle at all. #2 only read 10 psi. #3 read 250 psi and #4 didn't move the needle. I am not sure these numbers are very correct as this info completely conflicts with the earlier test of pulling the injector lines loose while running. The compression adapter doesn't have a seal at the bottom like the injectors do. I am wondering if the compression was sneaking by there

Delmer · Mar 18, 2016

Yeah, that contradicts your post #22 where the middle two had no affect, and 1 and 4 killed the engine when you disconnected them. 250 is in the neighborhood, but I can't see an engine starting, let alone running enough to work with only one cylinder? How many times did you test each cylinder?

Have you pulled the valve cover off to check the valves? run it on a temporary tank of fuel? hooked up air to your compression tester to see where the air is leaking? (intake, exhaust, engine breather).

chevman723 · Mar 19, 2016

Delmer, I have pulled the valve cover. I haven't gotten to the other things yet. I was hoping to have a better idea of what is going on after the compression test. I don't believe the readings are correct. I tested each cylinder twice and got pretty much the same readings. The thing didn't run rough when I parked it. It would drop to an idle when driving uphill or when I would try and drive into a pile of dirt. And I was getting a lot of diesel in the oil so I tried installing new injectors. after the new injectors it now will not start at all

580ck 188d no rpm under load

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