1984 5 ton m923

[Floridianson]

So how does a "normal" amount of knocking coconut sound correspond to load?

I am getting ready to check one of the trucks as it has the load knock. Have another truck that does not have any knock under load.
I believe the one with the knock has a little to much advance to the injection timing. I am going to run the valves and injectors to start with and see if that helps.

 

[topshot]

James
That's what I think the knock is the injectors how do you check them ?

 

[Floridianson]

Got to read the thread Will put out there for use on adjusting the valves and injectors. You could also google it as the instructions are out there for both kinds of injectors as you have to know what injectors you have.