HYDRAULIC SYSTEM MLC650 SERVICE/MAINTENANCE MANUAL
2-2
Published 09-09-16, Control # 229-09
HYDRAULIC PUMP IDENTIFICATION
Pumps 1, 2, and 4
Pumps one, two, and four (Figure 2-2) are bidirectional
variable-displacement pumps. Pump direction and
displacement is controlled by an electronic displacement
control (EDC).
Pump one provides flow to either drum one or six. A diverter
valve, driven by CCM—10, provides pump flow to the drum
commanded by the control system. The EDC is driven by the
IOLC32 control module.
Pump two provides flow to either drum two or three. A
diverter valve, driven by CCM—10, provides pump flow to
the drum commanded by the control system. The EDC is
driven by the IOLC32 control module.
Pump four provides flow to either drum two or the right travel
motors. A diverter valve, driven by CCM—10, provides pump
flow to either drum two or the right travel motors, as
commanded by the control system. The EDC is driven by the
IOLC32 control module.
FIGURE 2-2
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
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