Operation; Pressure Relief Procedure; Pump Module Operation - Graco Dyna-Star 24Y408 Instructions, Repair And Parts

Operation

Operation
NOTE: Unless otherwise noted, the reference letters
used in the following instructions refer to F

Pressure Relief Procedure

Follow the Pressure Relief Procedure whenever
you see this symbol.
This equipment stays pressurized until pressure is
manually relieved. To help prevent serious injury from
pressurized fluid, such as skin injection, splashing
fluid and moving parts, follow the Pressure Relief Pro-
cedure when you stop dispensing and before clean-
ing, checking, or servicing the equipment.
1. Disable hydraulic supply to pump (B) by isolating it
from the high pressure hydraulic supply using ball
valve (A).
2. Do one of the following:
• Cycle the timer [lubrication controller (F)] to
open the 3-way solenoid valve to reduce
trapped hydraulic pressure.
or
• Open pressure reducing valve (NN) to reduce
trapped hydraulic pressure (F
NOTE: The gauge (MM) on control module should read
zero pressure after performing this step.
3. Disconnect power from lubrication controller (F).
4. Relieve pressure in high pressure supply lines (W)
using two wrenches working in opposite directions
to slowly loosen fitting only until fitting is loose
and no more lubricant or air is leaking from fitting.
12

Pump Module Operation

. 2, page 7.
IG
Pump Modules for injector-based, Automatic Lubri-
cation Systems: provide lubricant flow and pressure to
operate a single line parallel automatic lubrication sys-
tem. The module requires a hydraulic power supply and
a timed signal from a lubrication controller. Based on
these signals, the pump module provides lubricant flow
and pressure to operate the injectors and vents the
injector system to reset the injectors.
1. Upon receiving a signal from a 24-volt lubrication
2. The pump builds pressure until the pressure switch
3. The lubrication controller (F) terminates the 24-volt
4. The 3-way solenoid valve closes, stopping the
. 9, page 11).
IG
5. The pressure reducing valve (NN) and flow control
NOTICE
Never allow pump to run dry of the fluid being
pumped. A dry pump will quickly accelerate to a high
speed, possibly damaging the pump. If your pump
accelerates quickly, or is running too fast, stop the
pump immediately and check the fluid supply.
controller (F), the 3-way solenoid valve opens, start-
ing the pump (B) and closes the vent valve (L).
in the system sends a signal to the lubrication con-
troller (F) ending the cycle, or the pump (B) stalls.
signal to the 3-way solenoid valve.
pump (B) and opening the vent valve (L) into the
reservoir (K).
valve (KK) control the pump output pressure and
cycle rate (F . 9, page 11).
IG
3A3429C