Installation
10
3A0096B
Hydraulic-Powered Pumps
•
Reference numbers and letters in parentheses in
the text refer to numbers and letters in the illustra-
tions.
•
. 3, page 11, shows a typical installation of an
hydraulic-powered pump. It is only a guide. Contact
your Graco distributor for actual system designs.
•
Be sure all accessories, including hydraulic lines
and fluid lines, are adequately sized and pres-
sure-rated to meet system requirements.
•
Use only electrically conductive hoses. Fluid hoses
must have spring guards on both ends.
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 (D), install a shutoff valve
(E) to isolate the system for servicing; a fluid pressure
gauge (J) to monitor hydraulic oil pressure to the motor
and avoid overpressurizing the motor or displacement
pump; a pressure- and temperature-compensated flow
control valve (H) to prevent the motor from running too
fast; a pressure reducing valve (K) with a drain line (M)
running directly into the hydraulic return line (T); and an
accumulator (L) to reduce the hammering effect caused
by the motor reversing direction.
On the hydraulic return line (T), install a shutoff valve (S)
for isolating the motor for servicing.
NOTICE
The Hydraulic Power Supply must be kept clean at all
times to avoid damage to the motor and hydraulic
power supply.
Blow out hydraulic lines with air and flush thoroughly
before connection to the motor.
Plug hydraulic inlets, outlets, and line ends when dis-
connecting them for any reason.
Summary of Contents for L200CM
Page 6: ...Warnings 6 3A0096B...
