Allis Chalmers HD5 Governor

I have a 1954 AC HD5 Dozer that i have been working on for several years to restore.  I have recently updated my starting system to a 42mt per Coke's recommendation and i couldnt be happier.  Get rid of the old push rod and embrace solenoid technology :)

I really appreciate all the information and knowledge that is shared on this forum.

Now to my question, i recently had an issue with a bad valve seat that caused a teardown of the head and rebuild of the top end.  I reassembled and started the motor with an easy couple cranks. It runs strong with full power again.

The problem i have is that the motor will run WOT if i quickly decelerate to idle.  If i slowly idle the motor down all is good and i can just turn off the machine without issue.  However a rapid deceleration causes the motor to run WOT. This also happens repeatedly if the process is repeated.  I have not changed anything in the governor and the injectors have recently been cleaned and reassembled.  I have been all over the internet looking for the answer.  I am hoping that one of you may have a suggestion.

If i did not have Vice grips on the rack this initial startup would have given me a heart attack... 

Yes, everything did work correctly before i removed and replaced the head.  

I am curious, does the injector have a point at which the fuel would would run full wide open on the opposite end of it's adjustment.  When the WOT scenario happens, i have to grab the vise grips and push them just slight in the direction that should increase fuel to the motor to find the "Sweet Spot" where the fuel is off.  

I know that the full fuel on position is with the injector control arm all the way in, but i am starting to wonder if the injector goes back to full fuel if adjusted too far out as well.

I thought i would be ok with reassembly if i left everything as it was, however, maybe now that i have full compression and the motor is running strong that the governor settings are off from compensations made by the previous owner due to lack off compression. 

I would love to find a DD tech in this area who is knowledgeable in making rack adjustments. 

First off, thank you for your help and time reviewing my post.

I found the issue...(I am an idiot) I made a drastic mistake while cleaning my injectors.  

Once cleaned, they do spray a nice 7 orifice  pattern from the spray tips.. but while cleaning on one of the injectors, i did have the small pinion gear fall out of the plunger portion of the injector.  I did, at the time, notice a small identifying dimple point on the pinion gear.  However, without the injector's small control rack removed, i did not realize that this small dimple point on the pinion gear must align between two similar dimple points on the injector's control arm/rack.  

So, this whole issue was all my fault from the beginning.  Once I aligned the Injector's control arm/rack and the pinion gear inside the injector using the alignment dimples the motor and governor responds as expected and no more near heart attack situations.