Kiewit Equipment is selling this:

Caterpillar Caterpillar D6R DS XL III

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Description: 2007 Caterpillar D6R XL DS VPAT III Track Type Tractor, backup alarm,
12-volt/10-amp converter, diagnostic connector, air conditioner,
ROPS/FOPS cab, differential steering control with tough shift,
rearview mirror, 3 retractable seatbelt, Caterpillar C9 ACERT diesel
engine, prescreener, shift management, automatic ether starting aid,
electronically controlled 3F/3R speeds powershift transmission, heavy
duty equalizer bar, end track guiding guards, front
tow hook, hinged bottom guards, product link ready, SOS sampling
ports, 84 guard, 7-roller track frame with carrier roller,
sealed/lubricated SystemOne track, ducted 95-amp alternator, fuel tank
guard, HD hinged radiator guard, air suspension cloth seat, radiator
core protector grid, moderate service track guide, 24 ES (41 SEC)
offset track, Forestry Arrangement includes: special cab with screen
group rear/sides/doors, sweeps goup, (8) lights light