What is the GVW of your 2004 Mack quad axle CV713 dump truck?

Please tell me you're not an owner/op who doesn't know this.

Your manufacturer's GVW is going to be the combined weight ratings of the tandem and steer axles. If you have 40k rears and an 18k steer, you have a manufacturer's GVW of 58k - your pushers are aftermarket, and are not counted in the manufacturer's GVW.

As for legal GVW, that depends on bridge law formula, and what your state's disposition is on primary and secondary roads. The last dump truck I drove was a tandem axle T800. I could gross 54k on secondary roads, but only 51.5k on the Interstate.