Graco 312350E, Instructions, Repair And Parts

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Installation
312350E 5
Pump Accessories
Follower Plate (A): ensures a good prime. Place
follower plate on grease and rotate while pressing firmly
to level material. Order part number 247700 for 60# and
90# automatic lube pump modules; 247701 for 120#
refinery reservoir; or 247702 for 400# refinery reservoir.
Pump Outlet Drain Valve (D): helps relieve fluid
pressure in pump when pump is shut off. Install valve
close to pump fluid outlet. Order valve, Part No. 111229.
Hydraulic Power Supply
See F
IG
. 1.
The hydraulic power supply system (U) must have a
pressure reducing valve and a pressure-compensated
flow control. A flow control valve (Q) is required to limit
the incoming flow to the reciprocator to a maximum of 3
gpm (11 lpm).
Hydraulic Lines
Shut-off Valves (H, L): installed on the hydraulic supply
and return lines. Order Part No. 108537 and 112578.
Drain Line: Monitor the weepage of hydraulic fluid or
lubricant. If it seems excessive or increases suddenly,
the reciprocator/pump seals may need to be changed.
See F
IG
. 2.
F
IG
. 2
Hoses: Use a minimum 1/2 inch supply line (R) and
minimum 3/4 inch return line (F) on the reciprocator.
Contact your Graco representative for details of line
sizing.
Pressure Reducing Valve (N): circulates excess
hydraulic fluid pressure back to the hydraulic power
supply. Install this valve (N) in the hydraulic supply line
with a drain hose (W) teed into the hydraulic return line
(F). Limit supply pressure to a maximum 600 psi (4.1
MPa, 41 bar).
Accumulator (P): reduces hammering effect caused by
the motor when it reverses direction.
Fluid-filled Pressure Gauge (M), Part No. 112567:
monitors hydraulic pressure to the reciprocator during
startup. See F
IG
. 1. Use the gauge for initial adjustment
of the reciprocator. It can be removed after adjustment.
Pump Outlet Drain Valve
•
A pump outlet drain (D) is required in your system.
This valve helps relieve pressure in the displace-
ment pump and hose when shutting down system
and in case of a clogged outlet hose. Install valve
close to pump outlet.
• Mount pump securely so it cannot move around
during operation. Failure to do so could result in
personal injury and/or equipment damage.
Limit Fluid Flow to Reciprocator
To reduce the risk of overpressurizing the hydraulic
reciprocator which could cause a rupture and serious
injury, including fluid injection, a hydraulic system
must have a means to limit the incoming fluid flow to
the reciprocator to a maximum of 3 gpm (11 lpm) and
600 psi (4.1 MPa, 41 bar). See description below.
Pressure gauge (M), pressure reducing valve (N)
and a flow control valve (Q) are included in the
Hydraulic Fluid Control Kit 247538 or 247705,
which can be ordered separately.
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