Truck Repair: Cummings N14 Firing Order for the Valve Adjustment Sequence, screw out, celect


Question
Hello Cliff - can you please provide me the firing order for the valve adjustment sequence in a Cummings N14.  Thank you for your attention to this.

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 rivet 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.
What is the CPL because it makes a different on injector setting.
CPLs 821,833,903,904,& 806 are 105 INLBS
CPLs 910,827,1185,1188,1210,1211,1256,&1280 are 90 INLBS
CPLs 1374,1380,1395,1405,& 1507 are 125 INLBS
On the STC,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 torque to specs to bottom injector plunger.Then tighten the jam nut down.Adjust the Injector first,then the valves.
On STC it would be greatly advised to run injector flush through the fuel system for an hour to clean carbon off injector tips to prevent plugging spray holes causing a missfire.Cummins sells it in a metal can & you sill need a return & suction line to hook up to engine(one at fuel inlet & one on fuel return) and run it out of the can.
 Firing order is 1,5,3,6,2,4