Cant get clutch set

That is going to be a tough one, The old hands may not even know that one, I would check with a dealer or a Clutch specialist? These Clutch guys have specs for everything!

 

Did he have the flywheel resurfaced? If so it could be that the flywheel is now too thin/out of spec which will set the clutch assembly too far away from the release bearing/maximum clutch fork travel, therefor, the pressure plate will not be able to fully release. Another possibility is that the clutch fork is worn, the pivot is worn, the linkage is worn. How good is your mechaninc? There is far more to a proper clutch repair than just putting in new disk, pressure plate and release bearing.

Have him inspect all of the clutch related parts mentioned above. Have him mic the flywheel to be sure there is enough material there, that is what sets the distance for the clutch assembly in relation to the transmission, if the flywheel is beyond spec there might be a shim available to make up the difference.

Another possibility is that the clutch disk is in backwards.

 

I do not know what box you are talking about?
The spec for a clutch are 1/2 inch between the release bearing and the preasure plate, the clutch pedal should have 1 inch free play in a cab over and the brake should be 1 inch from the floor.
I have removed the clutch lever on many cab over units and drilled it 1.5 inches lower down to get more effective travel. That really works well.
When you do a clutch you must replace the worn cross shafts and the bushings, the release fork. and if the cover is worn that also, I always replace the input shaft, and grind the flywheel.
I have never seen a cummins flywheel under spec but If you call Cummins they should be able to give you the spec.
I machined old Cat head bolts from a 3406B for clutch cross shaft bushings.
Just a thought!

 

Did you replace the input shaft the bearing housing for input shaft that the clutch brake uses to stop can wear down would mess up free travel and adjustment but to adjust clutch you have to have the 1/2 in gap set first you don't need any special tool to check that just use a 1/2 in extension to check then adjust free travel after that and on the clutch plate in wrong there are 2 plates one has sticker that says flywheel side and one says pressure plate side if they are in wrong it wont work

 

From what I understood above he isn't doing it right. You push clutch in and turn adjustment on pressure plate till throwout bearing is 1/2 inch from clutch brake. If clutch is not released you can not turn adjustment on pressure plate. Once you get the 1/2 inch gap between throwout bearing and clutch brake with clutch engaged or pedal up set the free travel in your linkage to 1 inch free travel at the top.