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308353
Installation
(HYDRAULIC-POWERED PUMPS)
CAUTION
Keep the hydraulic supply system clean at all times.
Be sure that all hydraulic fluid lines are absolutely
clean. Blow out the lines with air and flush thoroughly
with solvent before connecting to the hydraulic
motor, to avoid introducing harmful contaminants into
the motor. Plug the hydraulic lines immediately when
they are disconnected.
Do not exceed 37.8 liter/min (10 gpm) hydraulic oil
volume to the motor, to avoid stalling the pump.
For optimum pump performance, keep the tempera-
ture of the hydraulic oil below 54
_
C (130
_
F).
System Accessories
Fig. 3 is only a guide for selecting and installing sys-
tem components and accessories. Contact your Graco
distributor for assistance in designing a system to suit
your particular needs.
WARNING
A fluid drain valve (M) is required in your system.
This accessory helps reduce the risk of serious
bodily injury, including fluid injection and splashing
of fluid in the eyes or on the skin, and injury from
moving parts if you are adjusting or repairing the
pump.
The fluid drain valve assists in relieving fluid pres-
sure in the displacement pump, hose, and gun.
Triggering the gun to relieve pressure may not be
sufficient. Order Part No. 210658.
Mounting Accessories
Mount the pump (A) to suit the type of installation
planned. Fig. 3 illustrates a wall mount system. Pump
dimensions and the mounting hole layout are shown
on page 50.
Filters
Be sure your hydraulic power supply is equipped with a
suction filter to the hydraulic pump and a system return
line filter (AA) of 10 micron size.
Carefully follow the manufacturer’s recommendations
on reservoir and filter cleaning, and periodic changes
of hydraulic fluid. Use only Graco-approved hydraulic
oil. Order Part No. 169236 for 19 liter (5 gal.) or Part
No. 207428 for 3.8 liter (1 gal.) power supplies.
Hydraulic Lines
The motor has a 3/4 npt(f) hydraulic oil supply fitting,
and a 1” npt(f) hydraulic oil return fitting. Use a mini-
mum 13 mm (1/2 in.) ID hydraulic supply line, and a
minimum 22 mm (7/8 in.) ID return line.
On the hydraulic supply line (C),
install the following
accessories in the order shown in Fig. 3, using adapt-
ers as necessary:
D
A
shutoff valve (U
) isolates the pump for service.
D
A fluid pressure gauge (F)
to monitor hydraulic
oil pressure to the motor and to avoid overpressur-
izing the motor or displacement pump, and
a pres-
sure- and temperature-compensated flow con-
trol valve (G)
to prevent the motor from running
too fast and possibly damaging itself.
D
A pressure reducing valve (H), with a drain line
(E)
run directly to the hydraulic return line (D).
D
An accumulator (J)
to reduce the hammering ef-
fect caused by the motor reversing direction.
D
A
shutoff valve (V
) isolates the pump for service.
D
A
filter (AA
) of 10 micron size.
Hydraulic Motor Drip Pan
The hydraulic motor has a drip pan to collect any
leakage. Connect a 6 mm (1/4 in.) ID drain line (K) to
the barbed fitting on the drip pan, and place the free
end in a container to receive the drainage.
Fluid Supply Hoses
Be sure all fluid hoses (N and P) are properly sized
and pressure-rated for your system. Use only electri-
cally conductive hoses. Fluid hoses must have spring
guards on both ends. Use a whip hose (P) and a
swivel (R) between the main fluid hose (N) and the gun
(S) to allow freer gun movement.
Summary of Contents for Dura-Flo 900
Page 35: ...Notes...
