AVANT 640 - Auxiliary Hydraulics Oil Flow; And 2 Pump Setting

21
600 Series Technical specification
Auxiliary hydraulics oil flow
The graph under shows auxiliary hydraulics output ow at different engine rpm levels. Some attachment may work
optimally at certain ow level, use the graph to estimate correct engine rpm setting.
Max. auxiliary hydraulics oil ow can not be used with all attachments. Check correct engine rpm
and auxiliary hydraulics pump conguration for the attachment with the help of this graph and the
Operators Manual of the attachment.
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21,2
18,5
15,8
13,2
10.6
7.9
5.3
2.6
0
gal/min
RPM
1 and 2 pump setting
The pump selection lever (see page 25) controls the output of the auxiliary hydraulics. Some attachments require high
ow of hydraulic oil. If high ow is needed, select the 2-pump setting with the control lever. See the operator’s manual of
each attachment for recommended oil ow levels.
If the attachment requires only low power to operate, in some cases it can be useful to use the two pump setting while
using low engine rpm. This reduces the noise of the loader. If the attachment or loader stalls, switch to 1-pump setting
and increase engine rpm.
In normal use, keep the pump selection lever at the 1-pump setting to avoid overspeed of the
attachment and stalling of the loader. Keeping the lever at the 2-pump setting unnecessarily
will decrease the efciency of the hydraulic system of the loader.