A lift crane (710, 810, 910) comprising: a) a carbody (712, 812, 912); b) movable ground engaging members (714, 814, 914) mounted on the carbody (712, 812, 912) allowing the crane (710, 810, 910) to move over the ground; c) a rotating bed (720, 820, 920) having a front portion (704, 804, 904) and a rear-most fixed portion (703, 803, 903), the rotating bed (720, 820, 920) being rotatably connected to the carbody (712, 812, 912) about an axis of rotation (702, 802, 902) that provides a plane of rotation perpendicular to the axis; d) a boom (722, 822, 922) pivotally mounted about a fixed boom hinge point on the front portion (704, 804, 904) of the rotating bed (720, 820, 920) and including a load hoist line for handling a load; and, e) a boom hoist system connected to the rotating bed and the boom that allows the angle of the boom relative to the plane of rotation of the rotating bed to be changed; f) a counterweight unit (735, 835, 935) that includes a trolley (770, 870, 970), the counterweight unit (735, 835, 935) being in a movable relationship with respect to the rotating bed (720, 820, 920); g) a counterweight unit movement device (760, 860, 960) configured to move the counterweight unit (735, 835, 935) toward and away from the boom (722, 822, 922), the counterweight unit movement device (760, 860, 960) including at least one motor driving a gear connected to the trolley (770, 870, 970) to move the trolley (770, 870, 970) with respect to the rotating bed (720, 820, 920) as the motor turns the gear; the lift crane being characterized in that: h) the rotating bed (720, 820, 920) includes a counterweight support frame (732, 832, 932) including a rack coupled directly to a lower surface (719, 819, 919) of the rotating bed (720, 820, 920), the rack having teeth formed therein a) a carbody (712, 812, 912); b) movable ground engaging members (714, 814, 914) mounted on the carbody (712, 812, 912) allowing the crane (710, 810, 910) to move over the ground; c) a rotating bed (720, 820, 920) having a front portion (704, 804, 904) and a rear-most fixed portion (703, 803, 903), the rotating bed (720, 820, 920) being rotatably connected to the carbody (712, 812, 912) about an axis of rotation (702, 802, 902) that provides a plane of rotation perpendicular to the axis; d) a boom (722, 822, 922) pivotally mounted about a fixed boom hinge point on the front portion (704, 804, 904) of the rotating bed (720, 820, 920) and including a load hoist line for handling a load; and, e) a boom hoist system connected to the rotating bed and the boom that allows the angle of the boom relative to the plane of rotation of the rotating bed to be changed; f) a counterweight unit (735, 835, 935) that includes a trolley (770, 870, 970), the counterweight unit (735, 835, 935) being in a movable relationship with respect to the rotating bed (720, 820, 920); g) a counterweight unit movement device (760, 860, 960) configured to move the counterweight unit (735, 835, 935) toward and away from the boom (722, 822, 922), the counterweight unit movement device (760, 860, 960) including at least one motor driving a gear connected to the trolley (770, 870, 970) to move the trolley (770, 870, 970) with respect to the rotating bed (720, 820, 920) as the motor turns the gear;