8
G5-991-400B
G/H-25 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.the.pump.motor.
.. Check.the.inlet.pressure.or.vacuum..To.maintain.maximum.
flow,.inlet.vacuum.must.not.exceed.7.in..Hg.at.70°.F.(180.
mm.Hg.at.1°.C)..Inlet.pressure.must.not.exceed.50.psi.
(17.bar).
3.. Listen.for.any.erratic.noise,.and.look.for.unsteady.flow...If.the.
pump.does.not.clear,.refer.to.the.Troubleshooting.Section.
4.. If.the.system.has.an.air.lock.and.the.pump.fails.to.prime:
.
a.. Turn.off.the.power.
.
b.. Remove.the.pressure.gauge.or.plug.from.the.tee.fitting.
at.the.pump.outlet.(refer.to.the.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.the.system.on.and.off.until.the.fluid.coming.from.this.
port.is.air-free.
.
d.. Turn.off.the.power.
.
e.. Remove.the.plumbing.that.was.temporarily.installed,.and.
reinstall.the.pressure.gauge.or.plug.
5.. Adjust. the. discharge. pressure. regulator. to. the. desired.
operating. and. bypass. pressures.. Do. not. exceed. the.
maximum.pressure.rating.of.the.pump.
6.. After.the.pressure.regulator.is.adjusted,.set.the.safety.relief.
valve.at.100.psi.(7.bar).higher.than.the.desired.operating.
pressure..To.verify.this.setting,.adjust.the.discharge.pressure.
regulator. upward. until. the. relief. valve. opens.. Follow. the.
recommendations.in.the.above.NOTE.(step.4b).for.handling.
the.fluid.that.will.come.from.the.relief.valve.
7.. Reset.the.discharge.pressure.regulator.to.the.desired.system.
pressure.
8.. Provide.a.return.line.from.the.relief.valve.to.the.supply.tank,.
similar.to.the.bypass.line.from.the.pressure.regulator.
