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Installation (Hydraulic–Powered Pumps)
CAUTION
The Hydraulic Power Supply must be kept clean at
all times to avoid damage to the motor and hydraulic
power supply.
1. Blow out hydraulic lines with air and flush thor-
oughly before connection to the motor.
2. Plug hydraulic inlets, outlets, and line ends when
disconnecting them for any reason.
Always plug the hydraulic inlets, outlets and lines when
disconnecting them for any reason to avoid introducing
dirt and other contaminants into the system.
Be sure that your hydraulic power supply is equipped
with a suction filter to the hydraulic pump and a system
return line filter of 10 micron size. Carefully follow the
manufacturer’s recommendations on reservoir and
filter cleaning and periodic changes of hydraulic fluid.
NOTE: Hydraulic fluid is exhausted from differential
hydraulic motors only on the upstroke of the operating
cycle. The oil return line must have at least twice the
flow capacity as the oil supply line. Otherwise, back
pressure on the hydraulic motor piston will slow down
the motor and the fluid displacement pump, resulting in
a loss of pump performance.
On the hydraulic oil supply line (P), install a shutoff
valve (G) to isolate the system for servicing; a fluid
pressure gauge (H) to monitor hydraulic oil pressure to
the motor and avoid overpressurizing the motor or
displacement pump; a pressure- and temperature-
compensated flow control valve (J) to prevent the
motor from running too fast; a pressure reducing valve
(K) with a drain line (L) running directly into the hydrau-
lic return line (Q); and an accumulator (N) to reduce
the hammering effect caused by the motor reversing
direction.
On the hydraulic return line (Q), install a shutoff valve
(M) for isolating the motor for servicing.