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SECTION 5
DISASSEMBLY, CLEANING, AND ASSEMBLY INSTRUCTIONS
Section 5
is
a detailed step-by-step procedure for disassembling, cleaning,
and
assembling the TRIVAC dual-stage
vane
pu'mps.
It
is
to
be
used
in
conjunction with the troubleshooting chart (Table
6-1)
for pump repair.
MODULE REPLACEMENT PROCEDURE
NOTE: The correct replacement module
for
your pump is listed in the parts list (see Section 7).
NOTE: If your pump has the anti-suckback solenoid valve modification,
see
the supplement (PIN 722-78-031)
that came with the pump for special instructions
on
replaCing the pumping module.
If
you
prefer to replace the *module rather than repair it, proceed
as
follows:
1.
Use the Section 5-B instructions for disassembly.
2.
Do
Steps F-12,
F-13,
and
F-14
(except
B-8).
3.
Add the proper pump fluid (see Section
5-A-1)
as
follows (see Figure
1-1).
a.
Using an 8-mm allen wrench, screw a plug screw (8) with flat gasket (9) into each oil drain
port.
b.
Pour pump fluid into the exhaust port (6)
or
an
oil fill port until the fluid level
is
halfway up the
oil level glass (15)
or
oil sight gauge (72).
c.
NOTE: The pump may run
nOisily
until the pump fluid
has
time to flow into the module.
Run
the pump for
112
to 1 minute
and
then turn it off.
d.
Add additional pump fluid
as
necessary
to
bring the pump fluid level halfway up the oil level
glass (15)
or
between the L and the H marks on the oil sight qauge (72).
e.
Using
an
8-mm allen wrench, screw a plug screw (8) with flat gasket (9) into each oil fill port.
4.
Do
Steps
F-16
and
F-17.
5·A REQUIRED MATERIALS AND TOOLS
5·A·1
Required Materials
CAUTION:
DO
NOT DISASSEMBLE THE "MODULE UNLESS YOU HAVE THE CORRECT MODULE REPAIR
KIT
OR
GASKET SET. The repair kit contains a gasket set, a valve plate
(50),
and vanes (49/53). The kit for the
D2A,
D4A, D8A, and D16A pump models also contains
an
oil filter (35). The catalog number for a gasket set or
repair kit for each dual-stage pump model
is
listed
in
the parts list (See Table 7-1).
Correct gasket set or module repair
kit
Container for catching pump fluid
Standard cleaning solvent such
as
acetone
Do
not use a hydrocarbon solvent if your pump will
be
filled with any PFPE pump fluidt.
Grade 400 sandpaper
Correct pump
fluidt
as follows:
CAUTION:
UNDER CERTAIN CIRCUMSTANCES,
THE
PUMP FLUID RECOMMENDED BYTHE FACTORY MAY
BE
DIFFERENT THAN THAT LISTED BELOW.
IN
THESE INSTANCES, USE THE FACTORY RECOMMENDED
FLUID.
Pump Application Pump
Fluidt
Standard
Series
HE-175
Extreme-Corrosive
Service
HE-1600
(PFPE)
Corrosive Application
Series
HE-200 or HE-400
High-Temperature Applications HE-600
Replacement parts
as
needed (see Section 7
for
parts list).
5-A-2 Required Tools
NOTE: All required tools
and
all
nuts, bolts,
screws,
and
threaded holes
are
metric, except for the wrenches
required
for
the
U.
S.
standard bolts or
screws
securing the motor
to
the coupling housing adapter flange (72)
and
the
screws
and
bolts
used
in the motor.
·The module
is
the unit made
up
primarily of the shaft, rotors, vanes, coupling, centrifugal switch,
end
plates, pump cylinders,
and center bearing. Figure 5-3 shows a module.
tThe
terms
"lubricating
fluid,"
"pump
fluid,"
"fluid,"
and
"lubricant"
when used in this manu'al refer
to
the
"proper
vacuum pump
fluid'.
The pump's identification plate lists the type of vacuum pump fluid that we initially added to
the pump when
it
was new.
14
TRIVAC
"A"
Manual,
Edition
L
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