8
Bulletin HY22-3220A/US
Instruction Manual
550 Series Hydraulic Power Units
Power Unit Schematics
P
T
P
T
A
B
P
T
A
B
A
B
P
T
“S1-S4, P1-P4” CIRCUITS WITH
PRESSURE COMPENSATED FLOW
CONTROL F1 OR F2
“S5-S8, P5-P8” CIRCUITS WITH
PRESSURE COMPENSATED FLOW
CONTROL F1 OR F2
“D0” CIRCUIT (D03 VALVE TO BE SELECTED)
“D1” CIRCUIT INCLUDES MANAPAK DUAL P0
CHECK VALVE (D03 VALVE TO BE SELECTED)
A
B
P
T
CLOSED CENTER
A
B
P
T
OPEN CENTER
A
B
P
T
A
B
P
T
FLOAT CENTER
TANDEM CENTER
A
B
P
T
SINGLE SOLENOID
Parker Hannifin
HPS Division
New Hope, MN 55428 USA
