What did you do?!?!?!
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I have an 1955-56 initial release toy, later has some changes.
http://www.tnttoytrucks.com/NYCONDiggers.html
The headlights are just 1/2" chrome hole plugs, push out.
The grill has a blind rivet, grind production head and punch. We'll get shop head once cab off.
The front axle has a rivet, grind shop head and punch.
The rear walking beams have a rivet each, grind shop heads and punch.
The cab has a rivet at back, grind shop head, punch, front has a joggle.
The outriggers are captive, unscrew bolt, pull both beams through other side.
Cab off gives access to the engine compartment