Parker Oildyne 108 Series - Power Unit Schematics - Reversible; Reversible Circuit Diagrams; RR Reversible Circuit Schematics; LL Reversible Locking Circuit Schematics

9
Reversible Circuits
Instruction Manual
Oildyne 108/118 and 165/175 Series
Hydraulic Power Units
Bulletin HY22-3210A/US
Parker Hannifin
HPS Division
New Hope, MN 55428 USA
UP
DN
HPRV
LPRV
UP
DN
TRV
HPRV
LPRV
TRV
UP
DN
Back Pressure Valve
LPRV
HPRV
UP
DN
Back Pressure Valve
LPRV
HPRV
TRV
TRV
Power Unit Schematics
108/118 and 165/175 Series RR Circuit
(Reversible)
108/118 and 165/175 Series RB Circuit
(Reversible with Back Pressure)
108/118 and 165/175 Series LL Circuit
(Reversible Locking)
108/118 and 165/175 Series LB Circuit
(Reversible Locking with Back Pressure)
Note: Back Pressure circuits (RB and LB) require
the UP ports to be connected to the extend ports
of cylinders.