Caterpillar Performance Handbook, January 2017, SEBD0351-47

Lifting Capacity ● Definition

Hydraulic Excavators

This drawing shows how an excavator’s lifting capacity can vary with load position: HYPOTHETICAL MACHINE

Lifting Decreases

Optimum Lifting Range

7

Ground Line

Load Lift Point

Trench Depth

Pipe Diameter

Lifting Decreases

Load Radius

Digging Envelope Boundary

Tips for Lifting Below Grade: Use a cable for sufficient length to position the load lift point in the “optimum lifting range”. Problem: Short cable, deep trench — Can’t lift. Solution: Lengthen cable to locate bucket hinge pin in optimum lifting area — Can lift.

Tips for Lifting Above Ground: Get the load as close to the excavator as possible. Use a cable short enough and position the excavator so as to put the load lift point in the “optimum lifting range” (see sketch). Problem: Long reach cable — Can’t lift. Solution: Shorten reach and cable — Can lift. GROUND LEVEL LIFTING CAPACITIES The lifting capacities that are shown on the following pages are with the lifting point at ground level. These capacities are rated according to SAE Std. No. J1097. (For lifting capacities at other heights or with other tools, refer to current Specification Sheets.)

Edition 47 7-123