8
H5-991-406A
H/G-25-SD Maintenance
NOTE: The numbers in parentheses are the Ref. Nos. on
the illustrations in the Parts Manual.
Daily
Check.the.oil.level.and.the.condition.of.the.oil..The.oil.level.
should.be.1.in..(.5.cm).from.the.top.of.the.fill.port.—.so.that.the.
floor.of.the.upper.reservoir.within.the.pump.housing.is.flooded.
and.the.chamber.itself.is.about.1/4.full,.allowing.for.oil.expansion.
as.the.pump.runs.and.heats.up.
Use.the.appropriate.Wanner.Hydra-Oil.brand.motor.oil.for.the.
application.—.contact.Wanner.Engineering.if.in.doubt.
Caution: If you are losing oil but don’t see any external
leakage, or if the oil becomes discolored and contaminated,
one of the diaphragms (21) may be damaged. Refer to the
Service Section. Do not operate the pump with a damaged
diaphragm.
Caution: Do not leave contaminated oil in the pump housing
or leave the housing empty. Remove contaminated oil as
soon as discovered, and replace it with clean oil.
Periodically
Change.the.oil.after.the.first.100.hours.of.operation,.and.then.
according.to.the.guidelines.below..
Hours Between Oil Changes @ Various
Process Fluid Temperatures
<90°F
<140°F
<180°F
Pressure
RPM
(32°C)
(60°C)
(82°C)
Slurry Duty Pump Head
<300.psi.(1.bar).
<100.
,000.
1,500.
–.
.
<800.
4,000.
3,000.
–
NOTE: Minimum oil viscosity for proper hydraulic end
lubrication is 16-20 cST (80-100 SSU).
NOTE: Use of an oil cooler is recommended when hydraulic
end oil exceeds 180°F (82°C).
When.changing,.remove.the.drain.plug.(36).at.the.bottom.of.the.
pump.so.all.oil.and.accumulated.sediment.will.drain.out.
Caution: Do not turn the drive shaft while the oil reservoir
is empty.
Check.the.inlet.pressure.or.vacuum.periodically.with.a.gauge..
If.vacuum.at.the.pump.inlet.exceeds.7.in..Hg.(180.mm.Hg),.
check.the.inlet.piping.system.for.blockages..If.the.pump.inlet.
is.located.above.the.supply.tank,.check.the.fluid.supply.level.
and.replenish.if.too.low.
Caution: Protect the pump from freezing. Refer also to the
“Shutdown Procedure”.
Shutdown Procedure During
Freezing Temperatures
Take all safety precautions to assure safe handling of the
fluid being pumped. Provide adequate catch basins for
fluid drainage and use appropriate plumbing from drain
ports, etc. when flushing the pump and system with a
compatible antifreeze.
1.. Adjust.the.discharge.pressure.regulating.valve.so.the.pump.
runs.under.minimum.pressure..Stop.the.pump.
.. Drain.supply.tank;.open.any.draincocks.in.system.piping.and.
collect.drainage;.remove.plug.(4).from.manifold.and.collect.
drainage.
3.. Close. draincocks. in. system. piping. and. replace. manifold.
plug.
4.. Fill.supply.tank.with.enough.antifreeze.to.fill.system.piping.
and.pump.
.
NOTE: Disconnect the system return line from the supply
tank and connect it to a separate reservoir.
5.. Start.the.pump.and.allow.it.to.run.until.the.system.is.filled.
with.antifreeze..
NOTE: If the system has an airlock and
the pump fails to prime, follow step 4 of the Initial Start-
Up Procedure to clear the air.
6.. When.mostly.antifreeze.is.flowing.from.the.system.return.line.
stop.the.pump..Connect.the.system.return.line.back.to.the.
supply.tank.and.circulate.the.antifreeze.for.a.short.period.
7.. It.is.also.good.practice.to.change.the.oil.in.the.hydraulic.
end. before. storage. for. an. extended. period.. . This. will.
remove.any.accumulated.condensation.and.sediment.from.
the.oil.reservoir..Drain.and.refill.the.hydraulic.end.with.the.
appropriate. Hydra-Oil. and. operate. the. pump. for. a. short.
period.to.assure.smooth.performance..
