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Buddy
Buddy, Technician
Category: Heavy Equipment
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Experience:  25 years experience
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I am changing an injector on a N14 cummins and need the torque

Customer Question

I am changing an injector on a N14 cummins and need the torque specs and how to set the injector can you help?
Submitted: 7 years ago.
Category: Heavy Equipment
Expert:  Buddy replied 7 years ago.

Hi and welcome to JA. I am Buddy, and i will try and help you out.

 

Injector hold down bolt Torque Value: 41 n.m [30 ft-lb]

 

 

Alternately tighten the rocker shaft capscrews:

Tighten to 54 N•m [40 ft-lb] ,Tighten to 108 N•m [80 ft-lb] and thenTighten to 156 N•m [115 ft-lb]

 

 

Torque the jake hold down bolts to 75 ft-lbs.

 

 

Bar Engine in Direction of RotationPulley PositionSet Cylinder
InjectorValve
StartA11
Advance toB55
Advance toC33
Advance toA66
Advance toB22
Advance toC44
Firing Order: 1-5-3-6-2-4

 

 

Loosen the adjuster screw and Bottom the injector timing plunger by tightening and loosening the adjusting screw three or four times to remove the fuel.

When removing the excess fuel, do not apply crush to the injector timing plunger by further tightening the adjusting screw after the plunger is bottomed.

 

Tighten the adjusting screw on the injector rocker lever until the timing plunger just touches bottom.

 

Back out the adjusting screw on the injector rocker lever two flats (120 degrees).

Two flats will provide 0.56 mm [0.022 in] lash. The specification is 0.50 to 0.74 mm [0.020 to 0.029 in] lash.

 

Hold the adjusting screw and tighten the lock nut.

Torque Value: 65 n.m [50 ft-lb]

 

After setting the injector on a given cylinder, set the valves on the same cylinder.

 

 

I hope this helps you out. If you have anymore question, just ask.

Thanks
Buddy

Expert:  Buddy replied 7 years ago.

I hope i was able to help you out. If you have anymore questions, just ask.

 

Thanks
Buddy