Instruction 2002-0010
7
Vacuum Pump Models QV2 & QV5
Troubleshooting
Problem
Probable Cause
Remedy
Pump.does.not.
produce.desired.
vacuum
Oil.level.low
Add.oil.until.level.is.correct.
as.viewed.through.sight.glass
Oil.emulsified.or.
dirty
Replace.with.fresh.high.
grade.vacuum.pump.oil
Oil.inlet.or.oil.flow.
is.blocked
Clean.oil.inlet.and.filtering.
screen
System.leak
Check.system.being.evacu-
ated.for.leakage.and.repair
Pump.too.small
Check.the.size.of.system.
being.evacuated.and.choose.
proper.pump
Pump.worn
Contact.Bacharach.Service
Oil.leakage
Oil.tank.screws.
loose
Tighten.oil.tank.screws
Oil.seal.or.tank.
gasket.damaged
Contact.Bacharach.Service
Oil.injection
Too.much.oil.in.
tank
Drain.oil.until.level.is.
correct.as.viewed.through.
sight.glass
Pump.too.small
Check.the.size.of.system.
being.evacuated.and.choose.
proper.pump
Difficult.
.starting
Oil.temperature.
too.low
Open.intake.to.atmosphere.
and.intermittently.start.
motor.to.heat.pump.oil
Foreign.matter.in.
pump
Clean.pump.by.replacing.
vacuum.pump.oil
Motor.defective
Contact.Bacharach.Service
