Boom float position, description
Float position means that both the boom cylinders'
piston and piston rod sides are connected to the
hydraulic tank. The boom then floats with the weight
of the attachments when operating the boom lever
forward. The boom lifting is not affected by float
position.
Float position gives better fuel economy, faster
excavation cycle, less wear and less vibration.
When the float position is engaged, the hydraulic oil
of the machine can be used for other purposes than
lowering the boom, such as the dipper arm and/or
bucket operation. These functions then become
faster and more efficient.
Keep the following in mind.
- Always make sure that the boom operating lever
is in the neutral position before activating the float
position.
- Do not select the float position mode while the
track or tracks are elevated. Selecting the float
position mode and operating the boom operating
lever forward (boom down position) while the
track or tracks are elevated could cause the
machine to drop down suddenly.
- Do not release float position mode while the boom
operating lever forward (boom down position) and
bucket or tool is on the ground. This could cause
the machine to tilt up suddenly.
- Do not attempt to lift the track or tracks while the
machine is in float position mode.
224
Operating techniques
Attachments
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