806 vs 856 injectors

Kory1998

Member
Are the injectors the same in these two engine I?m pretty sure they didn?t put new ones in but idk what?s the difference.
 
There is a long story about injection nozzles and tips for 806. Service bulletins abound to explain which one is for what nozzle holder. The 856 wasn't so confusing but they did go to a 5 hole tip but have no idea if that is still current today. I have seen some mixups over the years even coming out of injection repair facilities.

Then on the turbo charged engines they changed the inside dia of the injection pipes so that requires a different nozzle tip and delivery valve in injection pump. It get confusing.
 

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