I'd venture a guess, that's Vollers, they were close to Bridgewater if I recall, as was a pipe place I used to pick up concrete pipe from. The red trim paint seemed to be on all their equipment. They did a big ATT job near me when I was up in Basking Ridge, 637's were in there. I've run 627's, but used to play dumb when asked most times, so I could run the D8K pushing, LOL it was something about going around in circles, from the cut to the pile, too much like being in a dumptruck all day, which was not all that much fun in my book but paid the bills so... I did a lot of pushing of scrapers, you learn to just bump em ever so light so not to launch the guy in the drivers seat. Also did a lot of ripping with that 4bbl massive single shank ripper on back of the 8, frost was fun, but rock you could not wait until they had the blaster come in,clunking along on hard ledge, shearing teeth/pins, do that too many years, the chiropractor will appreciate your business! On one job the name of the outfit was JF Mines, outa Hewitt, a fitting name lol, just looked them up and or had not thought about them in a long time, only found an obituary 2 weeks old, owner just passed.