Furukawa Unic URW370C4U Series, Operation & Maintenance Manual

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U-WAVE, Radio remote control device, (Option)
Engine speed increases
Independent operation
Engine speed is restricted
Interlocking operation
6. Engine speed control function
The system equips a function controlling the
engine running at a suitable speed according
to operating condition of the crane.
The function helps save energy because it
can ease temperature rise of hydraulic oil and
restrict the unnecessary increase of engine
speed by controlling the engine to run at an
appropriate speed.
• On independent crane operation, it allows
the engine speed not to be increased unnec-
essarily while the crane is operating func-
tions such as lowering boom, retracting
boom, swing C.C.W./C.W., and retracting
outriggers.
• The engine speed increases when the crane
operation has been switched from inde-
pendent to interlocking. (But no change in
maximum engine speed.)
• The engine runs at a medium speed while
the outriggers are being extended and
retracted.
• When swinging the crane on independent
operation by controlling manual lever,
swinging speed may become faster when
the independent operation is switched
to interlocking operation by controlling
other one of levers.
This is not a fault.