Cummins NTC-444 Overhead

Are all the push tube in their sockets in the cam followers? its easy to get one out of place when lowering the into the block.

 

How did you seat the injectors? The method I was taught was to lube the injector O-rings then put the injector in the head and using a 1 1/8 deep socket and a plastic hammer give it a thud with the hammer to set it in place. If you use the hold down clamp to pull it into the head you will damage the injector O-rings.
It can take a fair bit of cranking to get one started after replacing injectors.

 

We bumped them in with the end of a hammer handle. Not to hard.

The 444 STC is a little different animal and adjustment procedures changed along the way.
I would do this. Plug the STC oil supply line and crank the engine to relieve pressure. Adjust valves and injectors on the same cylinder at the same time.
Injector first and then the valve. A 1, B 5, C 3, A 6, B 2, C 4. Then check A 1 again. If it changed continue through the sequence until it does not change. Difference of pressure on the cam can change the clearance.
Torque the injector to 125 in lbs. Valves at 14 and 27 useless the tag says different. Go with the tag.
Then put the engine bakes on and set to .021
Chicken #### scratch in an old book but that other guys truck runs.

 

OBC method is recommended, injector setting depends on CPL and need to use a dial torque wrench for better accuracy. I've got a 1211 CPL and use this method without issue.