Truck Repair: CUMMINS FUEL INJECTOR, jake brakes, screw out

Question
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Followup To
Question -
HOW DO YOU ADJUST THE PRELOAD ON A FUEL INJECTOR, THE ENGINE IS A CUMMINS 855, INSTALLED IN A 1991 FREIGHTLINER.
Answer -
Is it a Celect or STC engine?(electronic is Celect,Manual engine is STC)Does it have Jake brakes or not.Do you need those specs?


YES IT DOES HAVE JAKE BRAKES, I BELIEVE IT'S A CELECT. AND YES I DEFINITLY NEED THE SPECS ASAP. THANK YOU VERY MUCH

Answer
On the Celect,you adjust valves & inj on same cyl.The mark A is now 1-6,B is 2-5, & C is 3-4.Valves are Int 0.014 & Exhaust is 0.027.The injector you hand tighten screw until injector plunger bottoms out.Back screw out 2 flats,ie turn corner of lock nut to align with the riviot in the rocker lever(pushtube side),then back out screw two "corners" then tighten the jam nut down.Adjust the Injector first,then the valves.C Brakes adjust to 0.023.Just make sure that U can wiggle the crosshead & rocker arm on that cyl & adjust it.You will have to turn engine some to get them all adjusted.