8
D10-991-2400B
D/G-10 Installation
Before Initial Start-Up
Before you start the pump, be sure that:
• All shutoff valves are open, and the pump has an adequate
supply of fluid.
• All connections are tight.
• The oil level is 1/4 in. (6 mm) above the cast surface in the
upper oil reservoir.
• The relief valve on the pump outlet is adjusted so the pump
starts under minimum pressure.
• All pulleys and belts are properly aligned, and belts are
tensioned according to specification.
• All pulleys, belts and shaft couplings have adequate safety
guards.
Initial Start-Up Procedure
1. Turn on power to pump motor.
2. Check inlet pressure or vacuum. To maintain maximum flow,
inlet vacuum must not exceed 7 in. Hg at 70° F (180 mm Hg
at 21° C). Inlet pressure must not exceed 250 psi (17 bar).
3. Listen for any erratic noise, and look for unsteady flow. If
pump does not clear, refer to Troubleshooting Section.
4. If system has air lock and pump fails to prime:
a. Turn off power.
b. Remove pressure gauge or plug from tee fitting at pump
outlet (refer to illustration on page 5).
NOTE: Fluid may come out of this port when the plug
is removed. Provide an adequate catch basin for fluid
spillage, if required. Fluid will come out of this port
when the pump is started, so we recommend that you
attach adequate plumbing from this port so fluid will
not be sprayed or lost. Use high-pressure-rated hose
and fittings from this port. Take all safety precautions
to assure safe handling of the fluid being pumped.
c. Jog system on and off until fluid coming from this port is
air-free.
d. Turn off power.
e. Remove plumbing that was temporarily installed, and
reinstall pressure gauge or plug.
5. Adjust discharge pressure regulator to desired operating
and bypass pressures. Do not exceed maximum pressure
rating of pump.
6. After pressure regulator is adjusted, set safety relief valve
at 100 psi (7 bar) higher than desired operating pressure.
To verify this setting, adjust discharge pressure regulator
upward until relief valve opens. Follow recommendations in
NOTE (step 4b) for handling fluid that will come from relief
valve.
7. Reset discharge pressure regulator to desired system
pressure.
8. Provide return line from relief valve to supply tank, similar
to bypass line from pressure regulator.
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