"'"
"'"
It
§
()
=
!
Symptoms
1. The lubricating
fluid
is
milky
white
or
dark
and the
pump
fails
to
reach its
ultimate
pressure and runs
hot.
2. The lubricating
fluid
has
an
unusual color,
is
very dark,
dirty,
turbid,
or
contains
flakes.
Trouble Area
Condensation in
lubricating
fluid.
Contamination
of
the pump
fluid.
Pump
fluid
has
broken down.
Probable
Cause
Gas
ballast valve (17)
is
closed.
Gas
ballast valve (17)
is
clogged.
Pump temperature
is
low.
Vapor in
gas
being pumped
exceeds
pump
tolerance.
Process
is
dirty.
Wrong
pump
fluid
is
being
used.
Pump
ran
low
on pump
fluid.
Large vacuum leak.
Pump
is
running continuously
above 112 Torr.
Recommended
Corrective
Action
Run pump
with
intake tube (1) closed
off
and
gas
ballast
valve
(17) open
until
vapors
are
expelled.
+Clean
gas
ballast valve (17).
Install new spring (25). flat gasket (24),
and
nonreturn
valve
(23).
or
valve
(19)
or
valve
plate (32)
as
necessary.
Run pump
with
gas
ballast valve (17) open until
pump
is
warm.
Insulate oil casing (12).
Add condensate trap
to
intake tube (1) and/or
exhaust
port
(6).
Change
lubricating
fluid.
Add
OF-3000
or
OF-lOOO
to
purify
fluid
and
prevent reoccurrence
of
problem.
or
adsorption trap, AK condensate trap, or
molecular filter to intake tube
(1)
to prevent
reoccurance of problem.
For
D2A. D4A.
D8A
&
D16A
pump
models
only,
replace oil
filter
(35).
+Clean pump
and
charge
it
with
the
recommended pump
fluid.
+Clean pump and charge
it
with
the
recommended pump
fluid.
Repair leak, +clean pump and change pump
fluid.
+Clear)
pump, change pump
fluid,
and run pump
at lower pressure.
Repair
Steps*
Sec.
4·2
B·5, 0-1,
& F-4
B-5, 0-1, & F-4
Sec.
4·1·2
B-1
&
Sec.
3-3
Sec.
4-3-2
B-1
&
Sec.
3·3
B-5
& B-6
Sec.
4-3·2
Sec.
4·3-.2
Sec.
4-3·2
Sec.
4-3-2
contains
the
disassembly steps required
to
perform
the
corrective action. Some critical assembly steps are also listed.
1$
not
specified,
the
steps are located
in
Section 5.
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