HYDRAULIC SYSTEM MLC650 SERVICE/MAINTENANCE MANUAL
2-4
Published 09-09-16, Control # 229-09
Pumps 5, 6, and 8
Pumps five, six, and eight (Figure 2-4) are bidirectional
variable-displacement pumps. Pump direction and
displacement is controlled by an electronic displacement
control (EDC).
Pump five provides flow to drum four. The EDC is driven by
the IOLC33 control module.
Pump six provides flow to drum five. The EDC is driven by
the IOLC33 control module.
Pump eight provides flow to the swing motors. Pump
direction and displacement is controlled by an EDC, driven
by the IOLC33 control module.
Item Description
A, B Main Pressure Lines
L1, L2 Case Drain Ports
M1 Gauge Port—A
M2 Gauge Port—B
M3 Gauge Port—Charge Pressure
M4, M5 Gauge Ports—Servo Pressure
S Suction Line—Charge Pump
FIGURE 2-4
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