Hitachi 1800 - Manual (Page 9)

Installation
311826B 9
Air Line Accessories
For air-powered pumps, install the following accessories
in the order shown in F
IG . 1, using adapters as neces-
sary.
• Bleed-type master air valve (E): required in your
system to relieve air trapped between it and the air
motor when the valve is closed. Be sure the valve is
easily accessible from the pump and located down-
stream from the air regulator.
• Pump air regulator (F): to control pump speed and
outlet pressure. Locate it close to the pump.
• Air line filter (J): removes harmful dirt and moisture
from compressed air supply.
• Second bleed-type air valve (K): isolates air line
accessories for servicing. Locate upstream from all
other air line accessories.
Hydraulic Line Accessories
For hydraulic-powered pumps, install the following
accessories in the order shown in F
IG . 2, using adapters
as necessary.
• Use a minimum 13 mm (1/2 in.) ID supply line (C),
and a minimum 22 mm (7/8 in.) ID return line (D).
The motor has a 3/4 npt(f) hydraulic oil supply fitting,
and a 1 in. npt(f) hydraulic oil return fitting.
• Supply line shutoff valve (U) isolates the pump for
service.
• Fluid pressure gauge (F) monitors hydraulic oil
pressure to the motor to avoid overpressurizing the
motor or lower.
• Pressure- and temperature-compensated flow
control valve (G) prevents the motor from running
too fast and possibly damaging itself.
• Pressure reducing valve (H) with a drain line (E)
runs directly to the hydraulic return line (D).
• Accumulator (J) reduces the hammering effect
caused by the motor reversing direction.
• Return line shutoff valve (V) isolates the pump for
service.
• Be sure your hydraulic power supply is equipped
with a suction filter to the hydraulic pump and a sys-
tem return line filter (W) of 10 micron size.
• 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 collect the drainage.
Fluid Line Accessories
Install the following accessories in the order shown in
F
IG . 1 and F IG . 2, using adapters as necessary.
• Fluid drain valve (M): required in your system, to
relieve fluid pressure in the hose and gun.
• Fluid filter (L): with a 60 mesh (250 micron) stain-
less steel element to filter particles from the fluid as
it leaves the pump.
• Gun or valve (S): to dispense fluid.
• Fluid line swivel (R): for easier gun movement.
• Suction kit (T): enables the pump to draw fluid from
a container.
Accessory Air Control Kits are available for the NXT
Air Motor. The kits include a master air valve (E), air
regulator (F), and filter (J). Order the kit separately.
See manual 311239 for information.