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Edition 47 7-123
Hydraulic
Excavators
7
Lifting Capacity
●
Definition
This drawing shows how an excavator’s lifting capacity
can vary with load position:
HYPOTHETICAL
MACHINE
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.)
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.
Trench
Depth
Digging Envelope Boundary
Load Lift Point
Pipe
Diameter
Ground
Line
Lifting
Decreases
Optimum
Lifting Range
Lifting
Decreases
Load
Radius