JAKE ADJUSTMENT ON ISX

[Minich Truck Repair]

looking for some insight or help.
back story just did an in frame on it new pistons, liners, bearings, loaded reman head (after market) got it put together and head set put the cams and rockers etc.. on. wedge and pin it for timing and start setting the over head. i can get the intake and exhaust valves adjusted just fine, when you go to the jakes you can not adjust them. back the adjuster screw all the way out and can not get the 7mm gauge in to adjust them. any thoughts or suggestions? i'm at a loss have done many in frames on these and heads and adjustments this is the first problem i've had out of one.