Komatsu F30791, Shop Manual

Page: 53 / 298

When engine is at low idling
. The LS set differential pressure of the LS valve is
taken as 7 bar (7 kg/cm
2
). In the area where the
LS differential pressure D P
LS
is more than 7 bar
(7 kg/cm
2
), the pump swash plate angle moves in
the minimum direction. If the area of opening of
the control valve is further increased and LS differ-
ential pressure D P
LS
goes below 7 bar (7 kg/cm
2
),
the pump swash plate angle is moved in the maxi-
mum direction. Even if the area of opening of the
control valve is the same, the LS set differential
pressure is lower than when the engine is running
at full throttle (even when the lever is operated to
the same halfwayposition), so the discharge flow
is reduced below the level when the engine is run-
ning at full throttle.
10-35
PC20R-8 PC27R-8