SHB 28Z3 EN – Edition 2.0 * 28z3s710.fm 7-23
Options
7.14 Proportional controls
Notice!
Fast actuation of the control lever for the attachment moves the attachment fast.
Slow actuation of the control lever moves the attachment slowly.
Function
This control mode offers proportional operation of the auxiliary hydraulics circuit depending
on the position of switch B on the left-hand side joystick (Fig. 13).
You can also modify the properties of the characteristic curve. Precision work, for instance
with the offset bucket, does not require the full throughput of the auxiliary hydraulics.
Therefore we recommend setting the controls to the low characteristic curve 1 (slow move-
ments) – see Adjusting control response on page 7-26.
The slide switch is not pressed fully in this position and you can move the machine more
smoothly (flat characteristic curve).
If you require the full throughput then characteristic curve 2 will be the choice to make
(slide switch pressed as far as it will go).
Caution!
Always use button C (see Fig. 13) on the left-hand joystick for hammer
operation.
☞ Do not use characteristic curve 1 for hammer operation since as described
above, oil throughput is not set to maximum in this case and therefore the
hydraulic output is not fully available for hammer operation.
Pressing button C ensures full throughput irrespective of the characteristic
curve that has been selected!
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