The PL83, replacing the 583T, has a rated lifting capacity of 75,575 kg – a 14 per cent increase over the previous model. The PL87, replacing both 587T and 587R, has a rated lifting capacity of 97,069 kg for a 6 per cent boost in lifting capacity.

Both new models use the Cat C15 ACERT engine, with a net horsepower rating of 310 hp (231 kW) in the PL83 and 366 hp (273 kW) in the PL87. Both retain the field-proven Cat drive train, including a rugged 3F/3R powershift transmission, high-efficiency torque divider, elevated final drives and the exclusive Cat differential steering system.

The increased lifting capacity for the PL83 and PL87 results from undercarriage and counterweight changes. The track roller frame on both machines has been lengthened and the rear idler repositioned, yielding higher lift capacity and enhanced stability when the machines work on slopes.

In addition, counterweight packages have been reconfigured to improve weight distribution for increased lifting capacity and to provide a reduced profile for even better forward and right-side visibility. Counterweight segments (13 for the PL83 and 15 for the PL87) are splined to counterweight assembly for positive retention and ease of removal.

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A new low-profile, heavy-duty pullmaster winch in the hook draw works simplifies transport and aids visibility. Improved hydraulics offer greater response and more precise control for greater machine productivity. Boom and hook draw works use independent winches with oil-disc brakes that ensure smooth operation and secure retention of position.

The PL83 and PL87 also feature well-appointed operator stations with a redesigned joystick that places all boom, hook and counterweight functions in a single right-hand control lever. Two push buttons at the top of the joystick allow adjusting engine speed up or down in small increments for precise control, and both machines are available with either an open roll over protection structure or enclosed cab.