Leach 2R-III, Maintenance Manual

Page: 94 / 168

84 Troubleshooting
Carrier & Packer Panels Move Down to “Interrupted Cycle”
Position
Operator Action
None. MCV (Main Control Valve) shifts automatically.
Hydraulic Sequence
At the end of the packer cylinder stroke, pressure builds to 1950 PSI (134 BAR) causing the MCV
(Main Control Valve) to shift, diverting flow to the rod end of the carrier cylinders. The cylinders
retract, moving the carrier and packer panels down to the “interrupted cycle” position (trapped fluid
keeps the packer panel cylinders retracted). At the end of the carrier cylinder retraction stroke,
pressure builds to 2150
PSI (148 BAR) causing the MCV (Main Control Valve) to shift to neutral.
the MCV (Main Control Valve) to shift to neutral. PRESSURE
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RETURN
MAIN CONTROL
VALVE
HYDRAULIC
F LUID TANK
PUMP
F RONT
CONTROL VALVE
TELESCOPIC
CYLINDER
TAILGATE LI F T
CYLINDER
CARRIER
CYLINDER
PACKER
CYLINDER
CARRIER
CYLINDER
TAILGATE LI F T
CYLINDER
P . O . CHECK
VALVE
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TRAPPED F LUID
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