7/24/2019 Cummins CELECT Injector Adjustment

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Cummins CELECT Injector Adjustment

Valve and Injector Adjustment The procedure required to set and adjust the valves and injectors on the ECI-Celect-

equipped M-11, L-10 and N 14-L engines is different from a PT-equipped Cummins

engine. Manually rotate the crankshaft over CW from the front to align the A or 1- 6 VS(valve set) mark on the accessory drive pulley with the stationary pointer on the engine

gear cover.

The Celect engines have both the valves and injectors set at the same time on any onecylinder. With the A or 1- 6 VS mark aligned with the gear case pointer, check to see if

 both the intake and exhaust valves are closed on cylinder 1 or 6. This can be confirmed

 by the fact that when you manually pull up and push down on the valve rocker arms, theyshould both rattle or indicate that free play exists between the end of the rocker arm and

valve crosshead assembly. 

CELECT Engine Injector and Valve Adjustment Sequence

 Bar Engine in Pulley Set Cylinder

 Direction of Rotation Position Injector and Valves 

 Start A 1

Advance to B 5

Advance to C 3Advance to A 6

Advance to B 2

Advance to C 4

At the same time the injector plunger should be at the bottom of its stroke. Once you have

determined whether the No. 1 or No. 6 cylinder injector and valves are ready to beadjusted

 NOTE: The engine should be at a temperature not higher than 140F (600C) when

 performing injector and valve adjustments.

 Procedure

1. If you assume that you are starting with the No. 1 cylinder, the A or 1- 6 VS mark on

the accessory drive pulley will be aligned with the stationary pointer.2. Bottom the injector plunger three to four times by installing an inch-pound (N.m)

torque wrench with a slotted screwdriver adapter in the adjusting screw slot. Turn thetorque wrench until it obtains a value of 25  in/lb. This action will remove all fuelfrom below the plunger so that we can obtain an accurate setting.

3. Gently turn the injector rocker arm adjusting screw down until it just bottoms.

4. Carefully back out the injector adjusting screw 120 degrees, which is the equivalent

of two flats on the locknut. (Check to see lock-nut has 6 flats)5. Hold the screw and tighten the locknut to between 40 and 45 lb-ft (54 to 61 Nm).

6. Adjust valves on same cylinder. (Use spec. off engine data plate)