Cole-Parmer 79203-00, 79203-05, 79203-10, 79203-20, 79203-30 Instruction Manual

Laboratory Vacuum Pumps

Owner’s Manual

for Models:

79203-00/-05/-10/-20/-30/-40/-45/-50/-55

New and improved
inlet connection.
See Section 2.10
for details.

WARNING

Do not block the exhaust port. Pressure will build up with the

potential of the oil case bursting with possible injury to personnel.

WARNING

Pumps being run continuously above 1 torr should use an

exhaust oil recycler.

WARNING

Pumps not recommended for filtration, aspiration or drying

electrophoresis gels

Cole-Parmer Instrument Company
625 East Bunker Court
Vernon Hills, IL 60061-1844
Phone: [phone]
Fax: [phone]
E-Mail: [e-mail] P/N 67-1383R2.3
Web-Page: www.coleparmer.com Printed in USA

INSTRUCTION

WARNING AND CAUTION

PLEASE READ BEFORE OPERATION

While reading your manual, please pay close attention to areas labeled W ARNING AND CAUTIONS. The

description of each is found below .

WARNING

W arnings are given where failure to observe instruction

could result in injury or death to people

CAUTION

Cautions are found where failure to observe the instruction should

result in damage to the equipment, associated equipment and process.

These units conform to the SI International system of units of measurement.

The following symbols (with recommendations of IEC1010) of warning will be found on the pump.

Caution - refer to accompanying documents

Caution - risk of electrical shock

Caution - hot surf ace

WARNING

Motor includes a self reseting thermal cut-out and the pump could restart

without actuation under fault condition.

2

CONTENTS

Section 1 - Installation

1.1 Unpacking

1.2 Pump Mounting

1.3 Pump Location

1.4 Exhaust Provisions

1.5 Electric Power

1.6 V acuum Connections

1.7 V acuum Gauges

1.8 V acuum Pump Oil

Section 2 - Pump Features & Principles of Operation

2.1 General Description

2.2 Principles of V acuum Pump Operation

2.3 Effects of Continued Pressure Reduction

2.4 Ultimate Pressure

2.5 Pump Mechanism Description

2.6 Intake Anti-suckback Isolation Valve

2.7 Pump Lubrication

2.8 Exhaust Filter

2.9 Gas Ballast V alve

2.10 Unibarb Intake Fitting

Section 3 - Specifications

Pump Specifications Chart

Section 4 - Motor Power Specifications/Features

Motor Specifications Chart

4.1 General Information

4.2 Changing the voltage setting

4.3 Choosing electrical powercord

4.4 Other electrical configurations

4.5 Explosion Proof Pumps

Section 5 - Operation

5.1 Starting Procedure

5.2 High Pressure Operation

5.3 Shutdown Procedures

3

Section 6 - Maintenance

6.1 Vacuum Problems

6.2 Oil Change

6.3 Developing a Maintenance Schedule

6.4 Forced Oil Flushing

6.5 Lip Seal/Gasket Change

Section 7 - T roubleshooting

7.1 Leak Detection

7.2 Troubleshooting Guide

Section 8 - Repair Kits

8.1 Shaft Seal Replacement

8.2 Minor Repair Kits

8.3 Major Factory Repair

Section 9 - Accessories

9.1 General

9.2 Pump Oil

9.3 Exhaust Filters

9.4 Traps

9.5 V acuum Gauge

Section 10 - Dimentional Drawings/Speed Curves

10.1 Pumping Speed Curves

10.2 Dimensional Drawings

10.3 Exploded Diagrams and Parts Lists
79203-00 / -05: Part List, Pump Model, Pump Module, Oil Case
79203-10: Part List, Pump Model, Pump Module, Oil Case
79203-20: Part List, Pump Model, Pump Module, Oil Case
79203-30: Part List, Pump Model, Pump Module, Oil Case
79203-40 / -45: Part List, Pump Model, Pump Module, Oil Case
79203-50 / -55: Part List, Pump Model, Pump Module, Oil Case

Section 11 - Warranty

MSDS - 79201-74 - Vacuum Pump Oil

4

Section 1: INSTALLATION

1.1 Unpacking

Carefully remove the pump from the shipping carton. Keep all paperwork and inspection tags for future reference.
If shipping damage has occurred, a claim must be filed with the carrier immediately; keep the shipping container for
inspection by the carrier.

1.2 Pump Mounting

Rubber bumpers are supplied with the pump base. They isolate noise and eliminate creeping. For more rigid
mounting requirements the pump base can be bolted directly to a surface by removing the bumpers from the base and
using the mounting holes and slots featured on the base.

1.3 Pump Location

The pump should be located in a clean and well-ventilated area and adequate space should be provided wherever
possible for routine maintenance such as oil changes. For best performance, the pump should be located as closely as
possible to its system. Determining factors for pump location should include length and size of connections, the
number of bends, and the type of exhaust connections.

1.4 Exhaust Provisions

Exhaust connections will be determined by the type of system to be exhausted and the desired cleanliness of the air
surrounding the pump. Under normal pumping conditions the optional exhaust filter will be adequate. Refer to
Section 9, Accessories for available exhaust filters. Where extreme exhaust conditions are encountered, it is best to
pipe the exhaust out of the building. Always use thick walled rubber vacuum hose, wire reinforced PVC tubing or
metal pipe for exhaust lines to avoid the possibility of the line becoming crimped or collapsing resulting in dangerous
exhaust line blockage.
The pumps’ exhaust connection is a 1”-20 threaded port for Models 79203-10, 79203-20 and 79203-30. The port is
located opposite the inlet port on top of the oil reservoir. The models 79203-10 and 79203-20 will accept Model 1417P
Exhaust Filter. Model 79203-30 accepts Model 1417P-7 Exhaust Filter. If a hose nipple is preferred for the exhaust
port, use part number 1393K for models 79203-10, 79203-20 and 79203-30. Call Cole-Parmer customer support
1-800-323-4340, prior to start-up if you have any questions.

WARNING

Never block or impede air flow from the exhaust port. High pressure

can build up within the oil reservoir if the exhaust port is blocked.

Check frequently , especially if exhaust is piped out of the building.

1.5 Electric Power

The voltage setting is perminantly displayed in a small window on the pump motor electrical box. The window is
located next to the power cord connection.

CAUTION

Make certain the power settings on the pump match your power

source before attempting to operate the pump. (Additional

information can be found in section 4: Motor Power).

5

1.6 V acuum Connections

"

The pump inlet is equipped with a Unibarb, see table below . The inlet is located next to the pump handle. It contains
a screen to collect any debris from getting into the pump. An extensive line of vacuum pump hoses, traps, etc. is
available from Cole-Parmer to meet the requirements of most vacuum systems. For the best vacuum, use a hose
clamp in conjunction with a vacuum hose to hose nipple connections. Cole-Parmer offers a number of different types
of vacuum tubing and connectors.
See Section 9 - Accessories or call Cole-Parmer customer support 1-800-323-4340.

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The choice of connections and fittings can have a very marked effect on the pumping speed at the vacuum chamber .
Any connection placed between the pump and the chamber creates an impedance to the flow of gas. This is
particularly true at low pressures in the millitorr range where the gas flow is substantially molecular in character. The
gas flow is then dependent upon the kinetic activity of the molecules to bring it to the pump intake. This impedance
is described by the term “conductance”.
The conductance of a tube is proportional to the cube of its diameter and inversely proportional to its length. There­fore, connecting lines should be as large in diameter and as short in length as practical. For best results the diameter
of the connecting tube should be at least as large as the diameter of the pump intake. To avoid a large reduction in
pumping speed at the vacuum chamber, the conductance of the line must be considerably greater than the speed of
the pump. Sharp bends in vacuum lines also contribute to conductance. To avoid reductions in pumping speed,
minimize the number of 90º angles in the vacuum system.

1.7 Vacuum Gauges

The type of vacuum gauge to be used in a system is determined largely by the pressure range to be measured. A
thermocouple or pirani gauge is recommended for measuring pressures in the range produced by these pumps. See
W ebsite or call for additional information.

1.8 V acuum Pump Oil

WARNING

The vacuum pump is shipped without oil inside to prevent possible

spillage during shipment. Oil must be added prior to use.

Use only Cole-Parmer V acuum Pump Oil Part No. 79201-74

Filling with Fresh Oil
Be sure the pump is filled with oil to the level indicated on the oil fill window . When additional oil is required, use only
Vacuum Pump Oil Part No. 79201-74; pump performance is not guaranteed with other brands of oil. Do not overfill
the pump, and be sure to replace the oil fill plug. Remove the oil fill plug located on the top of the oil case and add the
oil supplied in a bottle packaged with each pump. To ensure efficient operation and proper maintenance, and to
minimize noise and oil vapors, it is important to use the correct type and quantity of Cole-Parmer Vacuum Pump Oil
Part No. 79201-74 has been especially developed to have the proper viscosity, low vapor pressure, and chemical
stability needed to produce peak pumping efficiency . A sufficient amount of vacuum pump oil, enough for one fill, is
shipped with every pump.

Do not use oils designated Grade 18, 19 or 20.

Remove the fill plug located on the top of the oil case and add pump oil. It is best to check the oil window located on
the front of the oil case for oil level when the pump is running. Do not over fill the pump, and be sure to replace the oil
fill plug.
.

6

WARNING

Operating temperature of the oil is hot and can cause burns.

Avoid skin contact with the oil.

The fill plug has a raised middle section and a center slot for easy turning either by hand or with a screwdriver .
After the pump has been running for at least 15 minutes, check the oil level again. The oil level should be maintained
at the “full” mark on the oil level window while the pump is operating. Do not overfill; excess oil tends to be splashed
out the pump exhaust.

Guidelines for the frequency of oil changes and the oil changing procedure
can be found in Section 6-2: Oil Change.

1.9 Pumping Condesable V apors

Liquids can collect in a vacuum pump by being ingested or sucked directly into the pump, or by its vapors condensing
in the pump.

Never allow this pump to ingest liquids directly into the pump. If this should occur, drain the oil, replace with a fresh
supply and prevent a reoccurence.

To prevent condensable vapors from condensing in the vacuum pump, several measures should be taken. Thes
include:

1) Use of the Gas Ballast: It is located at the top of the pump next to the inlet. Turning the gray cap
clockwise opens the valve, letting a small amount of air into the pump.

2) Control of pressure in the system. Not all vacuum system need to, or should be, operated at the
lowest pressure possible for the pump.

WARNING

Cole-Parmer V acuum Pumps should not be operated above 1 T orr

(10mm Hg) for extended periods of time, while unattended.

DO NOT use the pumps for FILTRATION or ASPIRATION.

3) Trap condensable vapors in a cold trap. IF the pressure of the system must be set at or near the
ultimate pressure of the pump (ruling out the use of the gas ballast), or if the vapor load is high,
use of a cold trap is recommended. There are dry ice traps (-75º C), liquid nitrogen traps (-100º C)
and refrigerated traps (-25º C to -80º C). See Section 9, Accessories.

7

Section 2: PUMP FEATURES AND PRINCIPLES OF OPERATION

2.1 General Description

The Cole-Parmer Vacuum Pumps are two-stage, rotary-vane, oil sealed vacuum pumps. The three Cole-Parmer
models 79203-10, 79203-20 and 79203-30 offer a range of free air displacements (FAD) from 70 L/min (2.6 CFM)
to 173 L/min (6.1 CFM) at 60 Hz and from 58 L/mm to 141 L/min (8.4 m
79203-10, 79203-20 and 79203-30 Cole-Parmer models is 1 x 10-4 torr.

Cole-Parmer vacuum pumps offer a number of features that improve performance, or protect the pump or vacuum
system under specific operating conditions. Some of these features are a gas ballast, an intake anti-suck-back
isolation valve (or solenoid), and airflow cooling.

The pumps also offer features to enhance the flexibility of the pump and make it easier to use and maintain. These
include an easy pour oil drain, and auxiliary vacuum port to power accessories.

2.2 Principles of V acuum Pump Operation

The main purpose of a vacuum pump is to reduce the pressure in a vessel or a closed system. The degree of pressure
reduction is dependent upon the requirements of the application and the type of vacuum pump employed.

A quantity of gas is removed from the system with each cycle of the pump. Therefore, the pressure of the gas
remaining in the system is reduced with each pump cycle. Since the pump can remove only a small portion of the gas
with each pump cycle, this method of evacuation can never completely remove all gas in the vessel. Also, all compo­nents of the system contain minute sources of gas leakage wich are impossible to seal completely against atmospheric
pressure. Out gassing of material within the system provides additional sources of gas.

3hr-1

) at 50 Hz. The ultimate vacuum of

As a result, after prolonged pumping, a state of equlibrium is reached in wich the gas introduced from all of the
leakage sources is balanced by the ability of the pump to remove gas from the system. This state of equlibrium is
referred to as the ultimate pressure or blankoff pressure of the pump and its system.

2.3 Effects of Continued Pressure Reduction

The quantity of gas in the vessel is reduced with each evacuation cycle. The gas remaining in the vessel expands to
fill the vessel and consequently with each cycle the pressure in the vessel is reduced. This is a manifestation of
Boyle’s Law which states that, for a constant temperature, the volume of a body of gas is inversely proportional to its
pressure; i.e., if the volume is enlarged the pressure must be reduced.

As the amount of gas in the vessel is steadily diminished, its pressure is correspondingly reduced. The action of the
pump must therefore compress a successively smaller quantity of gas with each cycle to something greater than
atmospheric pressure in order to expel it from the pump.

At the beginning of an evacuation sequence, the compression ratio is very small. In the first cycle of operation the
pump draws in a volume of gas at atmospheric pressure and expels it at approximately atmospheric pressure. In
contrast, near its ultimate pressure, a pump draws in gas at (for example) 30 millitorr and must compress it to more
than 760,000 millitorr (atmospheric pressure) in order to expel it from the pump. Since the exhaust valve is generally
spring loaded to provide a good seal, the pressure required to open it is somewhat greater than atmospheric pressure.
Therefore, at an ultimate pressure of 1.3 X 10-4 mbar 0.1 millitorr, (1 x 10-4 T orr) the compression ratio performed by
the pump is greater than 1,000,000 to 1.

8

2.4 Ultimate Pressure.

As described previously , a quantity of gas is removed from the system with each cycle of the pump. Therefore, the
pressure of the gas remaining in the system is reduced with each pump cycle. Since the pump can remove only a
small portion of the gas with each pump cycle, it is obvious that this method of evacuation can never completely
remove all the gas in the vessel. In addition to this, all the components of the system contain minute sources of gas
leakage which are impossible to seal completely against atmospheric pressure. Outgassing of materials within the
system provide additional sources of gas.

As a result, after prolonged pumping, a state of equilibrium is reached in which the gas introduced from all the leakage
sources is balanced by the ability of the pump to remove gas from the system. This state of equilibrium is referred to
as the ultimate pressure or blankoff pressure of the pump and its system. No matter how much additional pumping
time is provided, no further reduction in system pressure will be accomplished once ultimate pressure is attained.

2.5 Pump Mechanism Description

The Cole-Parmer Vacuum Pumps incorporate two in-line rotary-vane stages with interconnecting ports. In operation,
the intake stage is at a lower pressure and the exhaust stage is at a higher pressure relative to each other. Each stage
contains a rotor assembly consisting of a rotor with two vanes and a stator. The pumps shaft turn the rotors, causing
the vanes in each section to sweep the surface of their stators. The vanes are pressed against the stators by centrifu­gal force and/or springs.

2.6 Intake Antisuckback Isolation V alve.

When power to the pump is turned off, this valve closes automatically, maintaining vacuum in the system being
evacuated, and vents the inside of the pump to atmospheric pressure. The solenoid is wired to the pump’s on-off
switch. When the pump is turned on, the solenoid plunger opens the valve to allow gas to flow into the pump intake.

2.7 Pump Lubrication.

T o ensure efficient operation and proper maintenance, and to minimize noise and oil vapors, it is important to use the
correct type and quantity of oil. Cole-Parmer Vacuum Pump Oil Part No.79201-74 has been especially developed to
have the proper viscosity , low vapor pressure, and chemical stability needed to produce peak pumping efficiency . The
ultimate vacuum guarantee on Cole-Parmer pumps applies only when this oil is used. Therefore, Cole-Parmer
Vacuum Pump Oil Part No.79201-74 is the only oil recommended for use with these pumps. Each pump is supplied
with a bottle of oil sufficient for filling. Additional oil is available. See Section 9: Accessories.

In Models 79203-10 and 79203-20, oil is fed into the pumping chamber by the differential pressures created by the
rotation of the pump. Oil metered into the pump through a narrow opening is sufficient to lubricate and seal the
moving parts, permitting the pumping of gas a relatively low pressure levels. Model 79203-30 uses a positive place­ment lubrication system which actively forces lubricating oil onto pumping surfaces.

2.8 Exhaust Filter .

Any oil-sealed vacuum pump tends to discharge oil mist from its exhaust port when the pump operates under high­flow conditions, such as when the pump’s intake is at or near atmospheric pressure. T ypically , oil mist in the form of
a white puff of “smoke” can be seen from the exhaust port when no filter is used. Once the vacuum level and the
corresponding air flow through the pump are reduced, very little, if any , oil mist will be emitted.

An optional exhaust filter is recommended for any vacuum pump installation where the pump operates at high intake
pressures for a prolonged period of time. Oil droplets entrained in the pump’s exhaust are removed by the exhaust
filter element. Use of an exhaust filter typically reduces or baffles pump noise as well. Exhaust filters are some­times referred to as Oil Mist Eliminators. See Section 9 - Accessories.

9

2.9 Gas Ballast Valve.

"

The Cole-Parmer Vacuum Pumps have a gas ballast valve that can increase the pump’s water vapor tolerance.
(The gas ballast valve is sometimes referred to as a vented exhaust valve.) In many vacuum pump applications the
gases being pumped from a system are a combination of permanent gases and undesirable vapors such as water
vapor. Under some conditions, the vapors condense in the second stage of the pump and contaminate the oil. The
gas ballast valve reduces oil contamination by decreasing or eliminating vapor condensation.

Vapor condensation is most likely to take place when the gas compression ratio is high, i.e. when the pump com­presses a relatively large volume of gas to a small volume. Whether or not condensation takes place is dependent
upon several factors, including the proportion of permanent gases to vapors at the pump intake. If the gases being
pumped consist entirely of vapors, condensation will definitely occur unless the gas ballast valve is opened. The gas
ballast valve adds a small amount of air at atmospheric pressure to the gas being compressed in the second stage.
This reduces the compression required to push the gas out past the exhaust valve (less reduction in volume is
required), and therefore reduces or eliminates condensation.

When the gas ballast valve is open, the pump has to work a little harder, resulting in a slight increase in operating
temperature. The increase in temperature is small, however, and is not harmful to the pump. Also, the pump is
slightly noisier, and the pump’s ultimate pressure is somewhat reduced. Therefore, the gas ballast valve should be
kept closed when it is not needed. Note that the gas ballast is not equally effective on all vapors, so it does not always
eliminate condensation completely.

2.10 UnibarbTM Intake Fitting - Simplifies Small Hose Connections

The Unibarb intake fitting allows the user to be able to use a wide range of ID hose to connect to the system. The
choice of hose size can have a very marked difference on pumping speed. It is the best to have the largest
connection I.D.(internal diameters) as possible. However, we recognize many lab appliances use hose barbs
accepting small I.D. hose.

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Therefore, connecting line should be as large in diameter and short in length as practical.

Included is a free hose clamp to hold the hose in place.

10

Section 3: PUMP SPECIFICATION

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Section 4: ELECTRICAL POWER SETTINGS

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** See Section 4.2 Changing the Voltage setting to see simple conversion between: LV and HV.

4.1 General

Models 79203-10, 79203-20, 79203-30, 79203-40, 79203-45, 79203-50 and 79203-55 include “global motors” to allow
use with most electrical power systems around the world. The pumps may be set for low voltage (LV) allowing use
in power systems within the voltage range, 100 to 120 volts and frequencies of 60 Hz or 50 Hz. They may also be set
for high voltage (HV) allowing use in power systems within the voltage range 200 to 230 volts and frequencies
of 60 Hz or 50 Hz.

CAUTION

Make certain that the voltage setting (L V or HV) is in the correct range

for your power before plugging in.

4.2 Changing the V oltage Setting

The voltage setting is permanently displayed in a small window on the pump motor electrical box. The window is
located next to the power cord connection and displays either LV for 100-120V or HV for 200-230V.

To change VOLTAGE setting:

1. Disconnect the electrical power cord.

2. Open the motor electrical box by removing the
four screws and removing the cover.

3. Locate the voltage selection switch next
to the external electrical power cord connector.

4. Remove the voltage marker (61-6071).
The switch is very tightly installed.
T o remove, place index and middle
finger along the top edge and pull backwards.

5. Change the voltage selection switch (61-1303)
to the opposite position.

6. Rotate the voltage marker, 180° and insert
into previous location. The voltage marker
is keyed to the switch setting so that it
can only display the correct setting. The
selected voltage setting can been seen through
the window in the electrical box.

7. Replace the electrical box cover
before reconnection the power cord.

Figure 4.1

12

4.3 Choosing Electrical Power Cords

A universal electrical power connector is provided on the Models 79203-10, 79203-20, 79203-30, 79203-40,
79203-45,79203-50 and 79203-55 on the motor electrical box. T o change to a dif ferent wall plug simply choose the
appropriate power cable from the list included below . All include a universal connector on the pump.

CAUTION:

When changing Power cords, always make certain that the motor voltage

setting (L V or HV) is in the right range for the electrical power .

4.4 Other Electrical Configurations

Other electrical configurations of Cole-Parmer pumps may be available. Check with Cole-Parmer for 3-Phase,
explosion-proof and other motor configurations.

-

13

Section 5: OPERATION

5.1 Starting Procedur e.

Before using the pump for the first time, it is a good idea to spend a few minutes inspecting the pump and its electrical
and vacuum connections. Review Section 1: Installation as required.

Check the AC power outlet to be sure that it is the same voltage and phase as the pump motor. Connect the power
cord to the power outlet and recheck the oil level.

Close off the pump intake and the gas ballast valve, and run the pump at blankoff for a few minutes. The gurgling
noise should go away after a few minutes of running; it is caused by the high volume of air that flows through the
pump when the pump is first turned on. If the gurgling noise does not stop, check the oil level to see if it is low , and
check the pump intake fitting to be sure that it is tight. Once proper pump operation has been verified, the pump intake
can be opened to the vacuum system.

After running the pump for a few minutes, check the oil level again. If the level is too high or too low, stop the pump
and add or remove oil as needed. Stop the pump and vent it to the atmosphere before adjusting the pump fluid level.

Before starting the pump when connection to the vacuum system, check all vacuum connections.

5.2 High Pressure Operation

The Cole-Parmer Vacuum Pumps are designed to be most efficient when operated at or near their ultimate blankoff
pressure. When operated at elevated pressures for long periods of time, the pump will run hotter . Additional cooling
may be required for both the pump and the motor. At elevated ambient temperatures under these conditions, the
thermal protection switch may cut out. The oil may tend to thin out at these temperatures, losing its ability to lubricate
effectively.

During operation at these pressures, oil mist may be generated at the exhaust port. The mist has the appearance of
a small cloud of smoke. Use of an Exhaust Filter with coalescing element is required. An exhaust filter with an oil
drain back feature is highly recommended. See Section 9: Accessories.

NOTE: If operating this pump for prolonged periods of time at or above 10 Torr,

contact the Cole-Parmer Vacuum Technical Service Department 1-800-323-4340

for further information and precautions.

5.3 Shutdown Procedures.

A few simple precautions are necessary before performing a pump shutdown. If a gauge is connected to the system,
first isolate the gauge, then turn off the power to the pump and open the system to the atmosphere.

NOTE: The intake isolation valve will automatically close when power to the pump

is turned off. This will maintain vacuum in the system (if the pump remains

connected to the rest of the system) and will vent the pump to atmosphere.

If the pump is disconnected from the system for any length of time, cover the pump intake with a rubber stopper or
other suitable cover to protect the pump against contamination. An intake screen is furnished to prevent loose
particles from entering.

If the exhaust port is open, that should also be covered. If the pump oil is contaminated and the pump is going to be
stored for a prolonged period, the oil should be changed before the pump is stored. Even if a pump is stored for a long
period with oil initially in good condition, check the oil when the pump is restarted, and change the oil if necessary .

14

Section 6: MAINTENANCE

6.1 V acuum Problems.

Inability to attain sufficient vacuum in a system is usually due to leakage, contamination, or unusual outgassing. A
system must be thoroughly clean and free from leaks to operate efficiently. If the system is found to be clean and
leak-free, but vacuum problems still exist, the pump should be checked. A simple way to test the pump is to measure
its ultimate pressure capability. This can be done by disconnecting the pump from the rest of the system and
connecting a pressure gauge directly to the pump intake. (Be sure to seal the pump intake from the atmosphere, and
be sure the gas ballast valve is closed.) The gauge can be any type that is suitable for the pressure levels expected.
Run the pump until the gauge indicates no further reduction in pressure, and compare the pressure reading to the
pump’s ultimate pressure rating.

If the pump meets its ultimate pressure specifications only when disconnected from the rest of the system, the fault
must be elsewhere in the system. If the pump’s ultimate pressure is unusually high, the pump may be badly contami­nated, low on oil, or mechanically defective. However, if the pressure is only slightly higher than the pump’ s guaran­teed pressure, an oil change may be all that is needed to bring performance up to specifications. Be sure to use only
Cole-Parmer Vacuum Pump Oil Part No. 79201-74 in Cole-Parmer V acuum Pumps; the ultimate pressure guarantee
does not apply if other types of oil are used.

The most common cause of efficiency loss in a vacuum pump is contamination of the oil, which is usually caused by
foreign particles and/or condensed vapors. The condensate emulsifies with the oil, and when the oil is recirculated,
the condensate evaporates. The resulting vapor then reduces the ultimate vacuum attainable in the system.

Some foreign particles and vapors form sludges with the oil. The presence of sludge in the oil impairs its sealing and
lubricating properties, and eventually could cause pump seizure. Therefore, periodic oil changes are necessary to
maintain efficient operation of the system. The interval at which oil changes are required is different for each set of
operating conditions; experience will help you determine the proper interval for your system and process.

6.2 Oil Change

The best time to change the oil is when the pump is warm and the oil is less viscous. Before attempting an oil change,
the pump must be disconnected from the power outlet.

WARNING

The drain oil is hot and can cause burns.

Operating temperature of the oil is typically 140 degrees

Fahrenheit or higher . A void skin contact with the oil.

Changing the Oil

T o drain old oil, rotate the drain valve counter-clockwise until the handle will no longer turn. A 6-12 in. length of 3/8”
I.D. tubing can be fitted on the oil drain nipple to direct the flow of oil neatly into a bottle or other container. When the
old oil has been removed, close the drain valve by rotating it clockwise ¼ turn until the handle will no longer turn.

Frequency of Oil Changes

The oil change interval is completely dependent upon the running conditions of temperature, operating pressure, hours
of daily operation, and upon the materials pumped. Clean, dry air at pressures below 50 torr are the most forgiving
conditions. T o determine your own oil change interval, visually monitor the pump oil conditions at regular intervals. If
you suspect harsh operating conditions, daily visual checks are recommended. When the oil becomes cloudy , dark or
includes particles of solids, it is time to change the oil.
Oil may be visually checked through the oil level window . However , a much better check is to use the drain to draw

15

out 20-50 ml into a small glass beaker and view the oil with a light behind it. Clean oil can be returned to the pump
through the oil fill port.

When filling the pump with oil, be sure to use only Cole-Parmer Vacuum Pump Oil Part No. 79201-74

The ultimate pressure guarantee applies only if this oil is used.

6.3 Developing A Maintenance Schedule

Periodic inspection should be performed to monitor for any color change to the oil. Comparing a sample of new oil
to what can be seen from the pump sight glass is the simplest test for oil condition. In addition, vacuum level
degradation (for example from 5-millitorr to 20-millitorr using a thermocouple gage at blank-off) can be an indica­tion that the oil has deteriorated or that is has become contaminated. Cloudy oil indicates that condensed vapors
have been absorbed during pumping. Trapped condensable vapors can be removed by using the gas ballast (see
section 1.9 and 2.9).Darkening of color, thickening of consistency or a “burnt” smell are all indications of deterio­rated oil. Pump should be drained and flushed with new oil before refilling for service. The recommended oil
change interval for pumps operating under normal conditions with clean gases and at below 1-torr should be no
longer than three months. Please note however that each pumping application is different and oil change intervals
need to be adapted to each specific operation. See Section 7 Troubleshooting and Section 9 Accessories for guides
to better oil care.

6.4 Forced Oil Flushing

When you drain oil through the drain valve, you are not removing the oil and contaminants that are inside the pumping
mechanism. You are removing oil only from the oil case. Cole-Parmer recommends that a forced oil flush of pumps
be performed at the regular maintenance oil change. Follow this procedure:

1. Check The Oil Level

If the oil level is well above the full mark, this may indicate either the pump has been overfilled with oil, or has ingested
a liquid or a large amount of vapor (water or organic solvents). Go to Step 2.
If the oil level is even with the full mark and you do NOT suspect corrosive gases or particulates (henceforth called
contaminants) ingested have damaged the mechanism, before going to Step 2, run the pump for 15 minutes to allow
the pump oil to warm up.

2. Drain the Oil

Turn off the motor for the vacuum pump. Drain the oil into a clear plastic container. A short length of hose attached
to the drain nozzle will direct the oil flow neatly without splashing.
Look for contaminants settling to the bottom of container. Depending upon the amount of contaminants, you may
need to repeat the following Steps 3 through 5 several times until the oil drains out clear .

3. Add Pump Oil

Flush the pump by adding approximately 150 ml of vacuum pump oil through the intake (IN) port while the pump is
turned on for 15-20 seconds. While adding the pump oil, block the exhaust (OUT) port with the palm of your hand.
Look for contaminated oil or other materials coming out of the drain. Turn of f the pump.

4. Repeat Step 4

Repeat adding pump oil until only clean oil comes out of the drain hose.

5. Fill the Pump

Add the amount of Vacuum Pump Oil Part No. 79201-74 to the “Full” mark.

6. Run the Pump

Plug the intake (IN) port with a rubber stopper.
Turn the pump on and run it for 10 minutes. Close the gas ballast.

7. Check the Vacuum Reading

16

Connect a thermocouple or Pirani vacuum gauge to the pump’ s intake. If the pump is running nearly as well as when
new, the total pressure reading of the gauge will be 10 microns or lower (1 x 10-2 torr, 1.33 x 10-2 mbar).

6.5 Lip Seal/Gasket Change

When the shaft seal in the mounting plate show signs of excess oil leakage, it should be replaced. Before attempting
replacement of the seal, the pump must be disconnected from the vacuum system and from the power outlet.

ledoM01-3029702-3029703-30297

laeSpiL2406-162406-162406-16

teksaG3460-143460-143460-14

MOTOR COUPLING

1. DRAIN OIL by turning the valve handle counter-clockwise in the horizontal position. The pump may be tilted to
remove residual oil from the oil case.

2. Remove the handle of the pump by removing 2 M8 screws.

3. The top cover (located under the handle) and Side Panels can now be removed by removing two size M3 screws
from each.

4. Remove the base by removing four M8 screws. W ipe up any oil in the base. If the Dip Pad is saturated with oil,
replace it.

5. The Electrical Box Cover is removed by unscrewing four Philips-head screws.

6. Disconnect the green quick disconnect located in the electrical box.

7. Motor can be disconnected by removing four motor mounting screws.

8. Remove the coupling from the pump shaft (1 set screw)

9. Remove the three screws attaching lip seal housing.

CAUTION

Don’t lose the woodruff key that sits in the key slot of the coupling;

it can drop out. If the key has any burrs (caused by previous

tightning of the coupling screws), sand it smooth. .

NOTE: If the lip seal gasket (under the lip seal in the lip seal housing) looks intact, there may be no need to

replace it.

IMPORTANT: Note the position of the arrow and “UP” on the housing surface. After you replace the Lip
Seal, be sure the arrow on this coupling again points in the same direction (so that other components will be
properly aligned).

17

10. Replace the Lip Seal

a) Place the lip seal housing in a vise (place a rag against the surfaces to protect against scratching). Gently
hammer a screwdriver against the lip seal at opposite sides until it pops out.

b) Before inserting the new lip seal, use your finger to add a thin coating of pump oil around its periphery.

c) Place the new lip seal in the coupling. It is essential that it be positioned perfectly flat on the bottom inner
flange. For best results, use a hand press. Place the coupling upright with the new seal on the hand press.
Then place a block of wood or metal having a very flat surface on top of the Lip Seal. Turn the hand press
lever until the Lip Seal is seated.

d) T o be sure the seal is completely seated, use a round tool having a slightly smaller diameter than the seal
to hammer the seal completely down to the bottom.

e) As for the lip seal gasket, even if you decide it’s not necessary to replace it, clean the coupling surfaces
that the gasket rests on.

11. Replace the Lip Seal Housing

a) It is recommended that you use
3 lockwashers to secure the LIP SEAL
HOUSING. Uniform tightness is important.
Repeatedly finger-tight the 3 screws in
sequence. Then lastly, turn them very tight.

b) Replace the Woodruff Key in its slot.
Use your small finger or a thin tool to hold it
in place as you replace the motor coupling
housing. Be sure the key stays in position.
If it should fall even a little distance, use a
screwdriver to push it back up in the key slot.
Then tighten the set key screw—very tight.

12. Replace Other Components

Reassemble the motor and other components.

Figure 6.5

18

Section 7 - TROUBLESHOOTING

7.1 Leak Detection

The importance of eliminating all leaks in a vacuum system is obvious when it is realized that a leak into the system,
at atmospheric pressure, expands in volume by a factor of 750,000 to 10,000,000 or more. The pump must remove
this added volume to maintain the desired vacuum. Fortunately a number of effective techniques for leak detection
have been developed:

Large Leaks

Locate by pressurizing the system and painting the suspected area with a thick soap solution. Escaping air will
produce soap bubbles.

Small Leaks

Locate by spraying a suspected area with acetone or gases rich in hydrogen, then observing a sudden change in
pressure on an thermocouple gauge.

CAUTION:

Use extreme caution, as these materials are highly flammable.

The difference in calibration of these gauges, for air and other gases, will produce a distinct change in the pressure
reading. To use this method of detection, the system must be under vacuum, and the gauge sensing tube must be
located between the pump and the area to be probed.

Fine Leaks

Locate by using a helium-sensitive, mass-spectrometer leak detector. This instrument will locate leaks, which cannot
be detected by any other method. Numerous fine leaks can have the total effect of a large leak.

19

7.2 T roubleshooting Guide

For Cole-Parmer Vacuum Pumps.

CONDITION PROBABLE CAUSE RECOMMENDED CORRECTIVE ACTION
Pump will not 1. Power off. Check switches and fuses.
start 2. Coupling damaged or Check coupling.

coupling set-screw loose.

3. Room is too cold. Drain and refill pump with warm oil.
Try with intake open to atmosphere.

4. Pump mechanism is seized. Pump to be repaired.

Pump does not 1. Pump oil is contaminated. Flush and change pump oil.
reach ultimate Use a foreline trap.
pressure 2. Pump is not filled with Add recommended pump oil.

oil, or has low oil level.

3. Pump has wrong oil in it. Flush and refill with recommended oil.

4. Leak in vacuum system. Locate and eliminate leak source.

5. Dirty foreline trap. Clean out cold traps and replacement elements
in coaxial and molecular sieve traps.

6. Gas ballast is open. Close gas ballast.

Excessively 1. Intake or exhaust lines Clear and straighten out lines. Check oil level.
noisy pump. are restricted

2. Coupling damaged. Examine coupling/replace.

3. Slapping noise at ultimate Clean orifice air passage.

pressure is typical for
some pumps.

4. Inside mechanism damaged. Pump to be repaired.

Pump generates 1. Pump overfilled with oil. Drain excess pump oil.
excessive smoke 2. Pump operating Use a larger capacity pump
or oil mist from continuously above its or modify your vacuum system.
exhaust port. maximum operating pressure

Pump oil is 1. Pump oil contaminated by Flush and change oil. Use a foreline trap
dark, has an process gases, or other in future. Consider using an oil
unusual color, foreign material filtration system or inert pump oils.
or is dirty. ingested by pump.

2. Pump oil has degraded. Pump was run too low on oil. The recommended
oil was not used. Pump is running continuously
above its maximum operating pressure.

Pump does not 1. Pump is running too cold. Allow pump to run until it warms up to its

achieve its rated operating temperature.
pumping speed 2. Exhaust or intake line Install larger inner diameter tubing.

is too narrow.

3. Pump oil is contaminated. Flush and change pump oil.
Use a foreline trap in future.

4. Very dirty trap or Clean out cold traps and replacement elements in

intake line. coaxial and molecular sieve traps. Clean or

replace vacuum piping.

Motor is ex- 1. Voltage selection Convert motor to be compatible with electrical sup
cessively noisy is incorrect ply . See Section 4.2 Changing the V oltage Setting.

20

Section 8: REPAIR KITS

8.1 Shaft Seal Replacement.

When the shaft seal in the mounting plate shows signs of excessive oil leakage, it should be replaced. Before
attempting replacement of the seal, the pump must be disconnected from the vacuum system and from the power
outlet.

A seal replacement kit is available. This kit contains the outer lip seal assembly and gasket, which can be replaced in
the field.

ledoMpmuPtiKlaeStfahS

50-/00-3029730-K5098
01-3029730-K7198
02-3029730-K7198
03-3029730-K7198

54-/04-3029760-K5198

55-/05-3029730-K5298

8.2 Minor Repair Kits.

A minor repair kit is available that provides a group of parts that can easily be replaced in the field.

ledoMpmuPtiKriapeRroniM

50-/00-3029720-K5098
01-3029720-K7198
02-3029720-K7198
03-3029720-K7198

54-/04-3029720-K5198

55-/05-3029720-K5298

8.3 Major Factory Repair .

With proper care, Cole-Parmer Rotary Vane Pumps will give many years of service. The basic working parts of
vacuum pumps are machined to close tolerances and require assembly on fixtures, with special tools, by mechanics
who are highly skilled at this work. Should major repairs involving the pump mechanism become necessary, we
strongly recommend that the pump be returned to the factory , or to the Cole-Parmer Repair Center, for repair . Obtain
a Returned Goods Number from Cole-Parmer before returning any vacuum pump.

These facilities are well-equipped and staffed with experts to insure prompt reconditioning of all returned pumps.
Broken, worn, scored or corroded parts are replaced with new parts, and the pump is thoroughly evaluated and tested
to determine that it meets the performance requirements.

21

9.1 General

4

0
0

This section lists the accessories available for the Cole-Parmer Rotary Vane Vacuum Pumps.

9.2 Pump Oil

SECTION 9: ACCESSORIES

noitpircseDytitnauQ.oNtraP

9.3 Exhaust Filters

retliFtsiMliOMFC5.4"2/1-2x"2/1-400-57797-A
retliFtsiMliOMFC5.4"2/1-2x"2/1-420-57797-A
retliFtsiMliOMFC0.7"2/1-2x"2/1-501-57797-A
retliFtsiMliOMFC0.7"2/1-2x"2/1-521-57797-A
retliFtsiMliOMFC0.42egnalF52WN02-57797-A

9.4 Cold T raps

liOpmuPmuucaVretiL1

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noitpircseD.pmeTwoLnoitcennoCyticapaC.oNtraP

parTdloCecIyrDC°97-61WNtq300-90297-A
parTdloCecIyrDC°97-52WNtq301-90297-A
parTdloCecIyrDC°97-.D.O"2/1tq303-90297-A

parTdloCnegortiNdiuqiLC°891-61WNL57.006-90297-A

7-10297-A

9.5 Coaxial T raps

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parTlaixaoCMFC0.461WN00-80297-A
parTlaixaoCMFC0.2152WN01-80297-A

9.6 Molecular Sieve Traps

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parTeveiSraluceloMMFC861WN
parTeveiSraluceloMMFC852WN

For additional information on Accessories, Parts or Products, please consult:

Cole-Parmer’s website at www.coleparmer.com

parTdloCnegortiNdiuqiLC°891-52WNL57.007-90297-A

3-80297-A
4-80297-A

NOTE:

Cole-Parmer’s Products Catalog

or

22

SECTION 10: DIMENSIONAL DRAWINGS/SPEED CURVES

P
7
7
7
7
7
7
7
7
7

10.1 Pumping Speed Curves

10.2 Dimensional Drawings

79203-00 /-05 79203-10 /-20 /-30

79203-40 /-45 79203-50 /-55

ump M odel A B C D E F G H I J K L M N O P Q R S
9203-00 14.13 8.70 5.52 4.07 5.73 6.81 3.16 0.54 5.58 1.56 6.76 8.70 0.95 0.54 7.50 6.68 1.10 0.98 0.85
9203-05 14.13 8.70 5.52 4.07 5.73 6.81 3.16 0.54 5.58 1.56 6.76 8.70 0.95 0.54 7.50 6.68 1.10 0.98 0.85
9203-10 18.90 9.60 6.54 4.76 7.00 9.88 5.05 1.44 7.92 1.90 7.60 9.45 0.87 0.89 8.78 - 1.61 0.94 1.18
9203-20 18.90 9.60 6.54 4.76 7.00 9.88 5.05 1.44 7.92 1.90 7.60 9.45 0.87 0.89 8.78 - 1.61 0.94 1.18
9203-30 18.90 9.60 6.54 4.76 7.00 9.88 5.05 1.44 7.92 1.90 7.60 9.45 0.87 0.89 8.78 - 1.61 0.94 1.18
9203-40 21.00 10.40 6.14 3.86 8.90 10.40 - 0.75 7.85 1.60 8.60 10.30 1.00 1.10 9.40 8.20 1.82 1.25 2.07
9203-45 21.00 10.40 6.14 3.86 8.90 10.40 - 0.75 7.85 1.60 8.60 10.30 1.00 1.10 9.40 8.20 1.82 1.25 2.07
9203-50 20.40 10.40 6.14 3.86 8.90 10.40 - 0.75 7.85 1.60 8.60 10.30 1.00 1.10 9.40 8.20 1.82 1.25 2.07
9203-55 20.40 10.40 6.14 3.86 8.90 10.40 - 0.75 7.85 1.60 8.60 10.30 1.00 1.10 9.40 8.20 1.82 1.25 2.07

23

P ARTS LIST 79203-00 /-05 VACUUM PUMP

ITEM QTY P/N A* B* DESCRIPTION

01 2 62-1014 Flat Head Screw 8-32x3/8
02 1 61-2370 Oil Window Cover
03 1 61-2229A Oil Window Glass
04 1 66-0304 1 O-Ring, Fluoroelast. #127
05 1 61-2413 Drain Plug
06 1 61-2158A 1 O-Ring, Fluoroelast. #110
07 1 61-2355 Oil Case
08 1 61-2130A O-Ring, Fluoroelast. #115
09 1 61-2372 Filler Plug
1 0 8 2 -0 0-6 712 Socket Head Screw 10-32x3/4
1 1 22 2-6 2-0 793 Lock Washer #10
12 3 62-0003 Socket Head Screw 10-32x3
13 1 61-2417 End Plate
1 5 4 2- 69- 6108 Lock Washer #8
16 1 61-2415 Baffle Assembly
17 2 61-2128A 2 O-Ring, Fluoroelast. #145
1 8 2 4 -21- 300 6 Dowel Pin 1/8x3/8
19 1 61-2416 Stator
2 0 5 2- 10 -26 05 Round Head Screw 8-32x5/16
2 1 1 2 -68 -56 32 Flat Washer #8
22 1 61-2017A Exhaust Valve Braket Ass’y
23 2 61-2119A 2 Valve Spring
24 2 61-2118A 2 Valve
27 1 61-1123A 1 Valve, Intake
28 1 61-1128A 1 Valve, Backer
29 2 41-2988 2 Lip Seal, Fluoroelast.
30 1 61-2177B Rotor
31 2 61-2179A Exhaust Vane
32 2 61-2178A Intake Vane
34 3 61-2157A 2 O-Ring, Flouroelast. #007

ITEM QTY P/N A* B* DESCRIPTION

35 1 61-2214B Wear Plate
36 1 61-2149B 1 Pump Gasket
3 7 2 2- 62- 0432 Lockwasher #6
38 1 61-2351 Mounting Plate
39 1 61-6324 Gas Ballast Valve Ass’y
40 1 61-9282A 1 O-Ring, Fluoroelast. #011
41 1 61-9479A 1 Drip Pad
42 1 61-2358 Intake Adapter
44 1 61-2159A 1 O-Ring Fuoroelast. #116
4 5 3 2 -0 0-6 708 Socket Head Screw 10-32x1/2
46 1 61-2316 Motor Adapter Plate
4 7 2 4- 21- 5010 Dowel Pin 3/16x5/8
48 2 41-2693 Coupling Body
4 9 4 2 -0 0-6 716 Socket Head Screw 10-32x1
50 1 41-2694 1 Spider Coupling
52 1 61-2377 Handle
5 3 2 2 -61 -11 65 Flat Washer 1/4
5 4 2 2 -0 1-6 112 Socket Head Screw 1/4-20x3/4
55 1 61-2039C Motor Ass’y 1/4 H.P. (115V/60Hz)
55 1 61-9813 Motor 1/4 H.P. (100-120/200-240V)
56 4 61-2123A 4 Bumper
57 1 61-2271C Pump Base
5 8 4 2 -0 0-6 812 Socket Head Screw 10-32x5/8
61 1 61-2139A 1 Disk Ass’y, ISO Valve
62 1 61-2216A Plunger
63 1 61-2155A 1 O-Ring, Fluoroelast. #020
64 1 61-2212A Adapter, ISO Valve
6 5 2 2 -0 0-6 41 0 Socket Head Screw 6-32x5/8
66 1 61-2308 ISO Operator Ass’y, w/O-Ring

24

A*: MAJOR REPAIR KIT CAT # N/A
B*: MINOR REPAIR KIT CAT # 8905K-02

67-1409
Sheet 1 of 2

Rev. 4 6/04

P ARTS LIST 79203-10 VACUUM PUMP

ITEM QTY PC. NO. A* B* DESCRIPTION

01 4 62-0325 Screw, Sockethead, M6x20 Blk.
02 1 61-6443 Oil Case Assembly
03 1 61-6354 Pump Module
04 1 61-6385 Gasket
05 1 66-0194 O-Ring, Fluoroelast. #164
06 1 61-2204A Spring, Gas Ballast
07 1 61-6305A Valve, Gas Ballast
08 1 61-9429 Screw w/ O-Ring
09 6 62-0265 Screw, Buttonhead, M4x8 Blk.
10 1 61-5353 Cover, Left
11 4 66-0211 Rubber Feet
12 4 62-0349 Screw, Sockethead, M8x16
13 8 2-63-0356 Lock Washer 5/16
14 1 61-6306 Base
15 1 61-6084 Drip Aid
16 1 61-5352 Cover, Right
17 3 2-63-0193 Lock Washer 1/4
18 1 61-6322 Mounting Plate
19 1 61-2157A O-Ring, Fluoroelast. #007
20 1 61-9282A O-Ring, Fluoroelast. #011

ITEM QTY PC. NO. A* B* DESCRIPTION

21 1 61-6324 Gas Ballast Assembly
22 3 62-0270 Screw, Sockethead, M6x20
23 1 66-0200 O-Ring, Fluoroelast. #216
24 1 61-6325 Intake Fitting Assembly
25 1 61-6360 Cover, Top
26 2 62-0331 Screw, Sockethead, M8x20 Blk.
27 1 61-6038 Coupling, Rubber
28 1 61-6024 Fan
29 1 62-0286 Set Screw, 10-32
30 1 61-6081 Key
31 4 61-9280A Dowel Pin, 1/4"
32 4 62-0346 Screw, Sockethead, M8x35
33 1 62-0344 Line Cord
34 1 61-6461 Motor Assembly 1/2 H.P.
35 1 61-6011 Handle
36 2 41-2363 Washer
37 1 61-6304 Solenoid Valve Assembly
38 1 61-6279 Plunger
39 1 61-9793 Isolator Disc
76 1 61-6076 Exhaust Plug

A*: MAJOR REPAIR KIT CAT # N/A
B*: MINOR REPAIR KIT CAT # 8917K-02

Sheet 1 of 2

Rev. 6 1/06

67-1410

25

P ARTS LIST 79203-20 VACUUM PUMP

ITEM QTY PC. NO. A* B* DESCRIPTION

01 4 62-0325 Screw, Socket head, M6x20 Blk.
02 1 61-6443 Oil Case Assembly
03 1 61-6168 Pump Module
04 1 61-6385 Gasket
05 1 66-0194 O-Ring, Fluoroelast. #164
06 1 61-6305A Spring, Gas Ballast
07 1 61-2118A Valve, Gas Ballast
08 1 61-9429 Screw w/ O-Ring
09 6 62-0265 Screw, Button head, M4x8 Blk.
10 1 61-5353 Cover, Left
11 4 66-0211 Rubber Feet
12 4 62-0349 Screw, Socket head, M8x16
13 8 2-63-0356 Lock Washer 5/16
14 1 61-6306 Base
15 1 61-6084 Drip Aid
16 1 61-5352 Cover, Right
17 3 2-63-0193 Lock Washer 1/4
18 1 61-6322 Mounting Plate
19 1 61-2157A O-Ring, Fluoroelast. #007
20 1 61-9282A O-Ring, Fluoroelast. #011

ITEM QTY PC. NO. A* B* DESCRIPTION

21 1 61-6324 Gas Ballast Assembly
22 3 62-0270 Screw, Socket head, M6x20
23 1 66-0200 O-Ring, Fluoroelast. #216
24 1 61-6325 Intake Fitting Assembly
25 1 61-6360 Cover, Top
26 2 62-0331 Screw, Sockethead, M8x20 Blk.
27 1 61-6038 Coupling, Rubber
28 1 61-6024 Fan
29 1 62-0286 Set Screw, 10-32
30 1 61-6081 Key
31 4 61-9280A Dowel Pin, 1/4"
32 4 62-0346 Screw, Socket head, M8x35
33 1 62-0344 Line Cord
34 1 61-6461 Motor Assembly 1/2 H.P.
35 1 61-6011 Handle
36 2 41-2363 Washer
37 1 61-6304 Solenoid Valve
38 1 61-6279 Plunger
39 1 61-9793 Isolator Disc
76 1 61-6076 Exhaust Plug

26

A*: MAJOR REPAIR KIT CAT # N/A
B*: MINOR REPAIR KIT CAT # 8917K-02

67-1411

Sheet 1 of 2

Rev. 5 1/06

P ARTS LIST 79203-30 VACUUM PUMP

ITEM QTY PC. NO. A* B* DESCRIPTION

01 4 62-0325 Screw, Sockethead, M6x20 Blk.
02 1 61-6443 Oil Case Assembly
03 1 61-6435 Pump Module
04 1 61-6385 Gasket
05 1 66-0194 O-Ring, Fluoroelast. #164
06 1 61-6305A Spring, Gas Ballast
07 1 61-2118A Valve, Gas Ballast
08 1 61-9429 Screw w/ O-Ring
09 6 62-0265 Screw, Buttonhead, M4x8 Blk.
10 1 61-5353 Cover, Left
11 4 66-0211 Rubber Feet
12 4 62-0349 Screw, Sockethead, M8x16
13 8 2-63-0356 Lock Washer 5/16
14 1 61-6306 Base
15 1 61-6084 Drip Aid
16 1 61-5352 Cover, Right
17 3 2-63-0193 Lock Washer 1/4
18 1 61-6322 Mounting Plate
19 1 61-2157A O-Ring, Fluoroelast. #007
20 1 61-9282A O-Ring, Fluoroelast. #011

ITEM QTY PC. NO. A* B* DESCRIPTION

21 1 61-6324 Gas Ballast Assembly
22 3 62-0270 Screw, Sockethead, M6x20
23 1 66-0200 O-Ring, Fluoroelast. #216
24 1 61-6325 Intake Fitting Assembly
25 1 61-6360 Cover, Top
26 2 62-0331 Screw, Sockethead, M8x20 Blk.
27 1 61-6038 Coupling, Rubber
28 1 61-6024 Fan
29 1 62-0286 Set Screw, 10-32
30 1 61-6081 Key
31 4 61-9280A Dowel Pin, 1/4"
32 4 62-0346 Screw, Sockethead, M8x35
33 1 62-0344 Line Cord
34 1 61-6461 Motor Assembly 1/2 H.P.
35 1 61-6011 Handle
36 2 41-2363 Washer
37 1 61-6304 Solenoid Valve Assembly
38 1 61-6279 Plunger
39 1 61-9793 Isolator Disc
76 1 61-6076 Exhaust Plug

A*: MAJOR REPAIR KIT CAT # N/A
B*: MINOR REPAIR KIT CAT # 8917K-02

Sheet 1 of 2

Rev. 6 1/06

67-1412

27

P ARTS LIST 79203-40 /-45 VACUUM PUMP

ITEM QTY P/N A* B* DESCRIPTION

01 2 62-1014 Screw, Flathead, #8-32x3/8
02 1 61-2370 Window Holder
03 1 61-2229A Window Glass
04 1 66-0304 O-Ring, Fluoroelast. #127
05 1 66-0212 O-Ring, Fluoroelast. #119
06 1 61-6020 Oil Fill Plug
07 1 61-5358 Oil Case
08 1 61-2130A O-Ring, Fluoroelast. #115
09 1 61-2372 Drain Plug
10 4 2-01-6116 Screw, Sockethead, 1/4-20x1
11 11 2-01-6114 Screw, Sockethead, 1/4-20x7/8
12 11 2-63-0193 Lock Washer 1/4
13 3 2-62-0793 Lock Washer #10
14 1 61-9793 Isolator Disk
15 1 61-6279 Plunger
16 1 41-0643 Gasket
18 1 61-9539B End Plate
21 1 61-8104A Shaft Seal Housing
22 1 61-9935 ISO Operator Assembly
23 5 2-00-2604 Screw, Fillisterhead, #8-32x1/4
24 1 62-0274 Orifice .014"
25 1 41-3175 Gasket, Nylon
26 5 41-2996 Vane, Spring
30 1 61-9527 O-Ring, Fluoroelast. #137
31 1 61-9598D Exhaust Stage
33 1 61-2118A Valve, Gas Ballast
34 1 61-9561A Exhaust Valve Spring
35 1 61-9580A Exhaust Valve Cover
36 2 61-9478 Stand Off Spacer
38 2 61-9615A Exhaust Vane
40 1 61-9595C Rotor
41 2 61-9616B Intake Vane
42 1 41-0624 Woodruff Key
43 6 61-9280A Dowel Pin, 1/4"

ITEM QTY P/N A* B* DESCRIPTION

44 2 41-3390 Lip Seal, 3/4"
45 1 61-9526 O-Ring, Fluoroelast. #151
46 1 61-9597D Intake Stage
47 3 61-9560A Bypass Valve
48 2 61-9582A Bypass Valve Spring
49 1 61-9516A Intake Valve Cover
50 2 2-69-6108 Lock Washer #8
51 3 2-00-6814 Screw, Sockethead, #10-32x7/8
52 1 61-9640A Valve Cover Assembly
53 1 61-9609B Gasket
54 1 61-6305A Spring, Gas Ballast
56 1 61-5347 Mounting Plate
57 1 61-2157A O-Ring, Fluoroelast. #007
58 1 61-9282A O-Ring, Fluoroelast. #011
59 1 61-6324 Gas Ballast Valve Assembly
60 1 61-5348 Intake Adapter Assembly
62 1 66-0200 O-Ring, Fluoroelast. #216
64 4 62-1071 Lock Washer 1/4 Small
65 2 41-3072 Flange Coupling
66 4 2-01-6516 Screw, Sockethead, 3/8-16x1
67 1 61-5246 Motor Adapter Plate
68 1 61-6011 Handle
69 6 2-01-6316 Screw, Sockethead, 5/16-18x1
70 10 41-2363 Washer
71 4 2-01-6320 Screw, Sockethead, 5/16-18x1-1/4
72 1 41-3073 Coupling Sleeve
73 1 41-2637 Motor Shaft Key (Suppl. w/Motor)
74 1 61-5359 Motor Assembly 3/4 H.P.*
75 1 61-5245 Base
76 1 61-9742 Drip Pad
77 4 61-9607A Rubber Bumper
78 1 41-3005 O-Ring, Fluoroelast. #008
79 2 2-68-5632 Washer #8
80 4 2-63-0593 Lock Washer 3/8

28

A*: MAJOR REPAIR KIT CAT. # N/A
B*: MINOR REPAIR KIT CAT. # 8915K-05

67-1413
Sheet 1 of 2
Rev. 7 1/06

P ARTS LIST 79203-50 /-55 VACUUM PUMP

ITEM QTY PC. NO. A* B* DESCRIPTION

1 2 62-1014 Screw, Flathead, #8-32x3/8
2 1 61-2370 Window Cover
3 1 61-2229A Window Glass
4 1 66-0304 O-Ring, Fluoroelast. #127
5 1 66-0212 O-Ring, Fluoroelast. #119
6 1 61-6020 Oil Fill Plug
7 1 61-5358 Oil Case
8 1 61-2130A O-Ring, Fluoroelast. #115
9 1 61-2372 Drain Plug
10 4 2-01-6116 Screw, Sockethead, 1/4-20x1
12 1 61-9539B Cover Plate
13 1 61-9793 Isolator Disc
14 1 61-6279 Plunger
16 1 41-0643 Gasket
20 1 61-9935 Isolator Assembly
21 1 61-8104A Shaft Seal Housing
23 5 2-00-2604 Screw, Fillisterhead, #8-32x1/4
24 1 62-0274 Orifice .014"
25 1 41-3175 Gasket, Nylon
30 1 61-9379 O-Ring, Fluoroelast. #139
31 1 61-5307 Exhaust Stage
33 1 61-2118A Valve, Gas Ballast
34 1 61-9561A Exhaust Valve Spring
35 1 61-9685 Exhaust Valve Cover
36 2 61-9478 Stand Off Spacer
38 2 61-9570A Exhaust Vane
39 5 41-2996 Vane, Spring
40 1 61-5304 Rotor
41 2 61-9571B Intake Vane
42 1 41-0624 Woodruff Key
43 6 61-9280A Dowel Pin, 1/4
44 2 41-3390 Lip Seal, 3/4
45 1 61-9378 O-Ring, Fluoroelast. #152
46 1 61-5305 Intake Stage
47 3 61-9560A Bypass Valve

ITEM QTY PC. NO. A* B* DESCRIPTION

48 2 61-9582A Bypass Valve Spring
49 1 61-9686 Intake Valve Cover
50 2 2-69-6108 Lock Washer #8
51 3 2-00-6814 Screw, Sockethead, #10-32x7/8
52 1 61-9687 Valve Cover Assy
53 1 61-9609B Gasket
54 1 61-6305A Gas Ballast Spring
55 1 61-9742 Drip Pad
56 1 61-5347 Mounting Plate
57 1 61-2157A O-Ring, Fluoroelast. #007
58 1 61-9282A O-Ring, Fluoroelast. #011
59 1 61-6324 Gas Ballast Valve Assy
60 1 61-5348 Intake Adapter Assy.
61 1 66-0200 O-Ring, Fluoroelast. #216
62 11 2-01-6114 Screw, Sockethead, 1/4-20x7/8
63 4 62-1071 Lock Washer 1/4 Small
64 2 41-3072 Flange Coupling
65 4 2-01-6516 Screw, Sockethead, 3/8-16x1
66 1 61-5246 Motor Adapter Plate
67 1 61-6011 Handle
68 6 2-01-6316 Screw, Sockethead, 5/16-18x1
69 6 41-2363 Washer
70 4 2-01-6320 Screw, Sockethead, 5/16-18x1-1/4
71 1 41-3073 Coupling Sleeve
72 1 41-2637 Motor Shaft Key (Suppl. w/Motor)
73 1 61-5359 Motor Assembly 3/4 H.P.*
74 1 61-5245 Base
75 4 2-63-0356 Lock Washer 5/16
76 4 61-9607A Rubber Bumper
77 1 41-3005 O-Ring, Fluoroelast. #008
78 2 2-68-5632 Washer #8
79 4 2-63-0593 Lock Washer 3/8
82 11 2-63-0193 Lock Washer 1/4
83 3 2-62-0793 Lock Washer #10

A*: MAJOR REPAIR KIT CAT # N/A
B*: MINOR REPAIR KIT CAT # 8925K-02

Sheet 1 of 2

67-1414

Rev. 8 1/06

29

P ARTS LIST 61-6168 PUMP MODULE

ITEM QTY P/N A* B* DESCRIPTION

40 6 62-0262 Screw, Sockethead, M5x20
4 1 9 2- 62-0 793 Lock Washer #10
42 1 61-6165 Cover Plate
43 1 41-3175 Gasket, Nylon
44 1 62-0274 Orifice .014”
45 1 66-0204 O-Ring, Fluoroelast. #141
4 6 2 4 -21- 300 6 Dowel Pin, 1/8”x3/8”
47 1 61-6167 Exhaust Stage
48 1 61-6058 Exhaust Valve
49 1 61-6057 Bypass Valve
50 1 61-6305 Spring, Exhaust Valve
51 1 61-6164 Holder, Exhaust Valve
5 2 5 2 -69- 6108 Lock Washer #8
53 5 62-0271 Screw, Sockethead, M4x6
54 2 61-6053 Exhaust Vane

Used on:

- 79203-20

ITEM QTY P/N A* B* DESCRIPTION

55 4 41-2996 Vane Spring
56 2 61-6050 Vane, Intake
57 1 41-2732 Key Coupling
58 1 61-6040 Rotor
59 1 66-0203 O-Ring, Fluoroelast. #151
60 1 41-3390 Lip Seal, 3/4”
61 2 61-9280A Dowel Pin, 1/4”
62 1 61-6166 Intake Stage
63 1 41-0643 Gasket
64 1 61-6055 Lip Seal Housing
65 1 61-6042 Lip Seal .669”
66 1 41-2730 Coupling
67 1 61-6123 Cover
68 1 61-2157A O-Ring, Fluoroelast. #007

30

A*: MAJOR REPAIR KIT CAT # N/A
B*: MINOR REPAIR KIT CAT # N/A

67-0957

Sheet 1 of 2

Rev. 6 5/05

P ARTS LIST 61-6435 PUMP MODULE

ITEM QTY P/N A* B* DESCRIPTION

40 9 62-0177 Screw, Sockethead, M5x16
4 1 9 2- 62-0 793 Lock Washer #10
42 1 61-6318 Cover Plate
43 1 41-3175 Gasket, Nylon
44 1 62-0274 Orifice .014”
45 1 66-0204 O-Ring, Fluoroelast. #141
4 6 2 4 -21 -3 006 Dowel Pin, 1/8”
47 1 61-6429 Exhaust Stage
48 1 61-9560A Exhaust Valve
49 1 61-6057 Bypass Valve
50 1 61-9561A Exhaust Valve Spring
51 1 61-6432 Exhaust Valve Holder
5 2 2 2- 69- 6108 Lock Washer #8
53 2 62-0271 Screw, Sockethead, M4x6

Used on:

- 79203-30

ITEM QTY P/N A* B* DESCRIPTION

54 2 61-6052 Vane, Exhaust
55 4 41-2996 Vane, Spring
56 2 61-6049 Vane, Intake
57 1 41-2732 Key Coupling
58 1 61-6426 Rotor
59 1 66-0207 O-Ring, Fluoroelast. #149
60 1 41-3390 Lip Seal, 3/4”
61 2 61-9280A Dowel Pin, 1/4”
62 1 61-6427 Intake Stage
63 1 41-0643 Gasket
64 1 61-6055 Lip Seal Housing
65 1 61-6042 Lip Seal .669”
66 1 41-2730 Coupling
67 1 61-5351 Cover

A*: MAJOR REPAIR KIT CAT # N/A
B*: MINOR REPAIR KIT CAT # N/A

Sheet 1 of 2

Rev. 1 5/05

67-1628

31

P ARTS LIST 61-6354 PUMP MODULE

ITEM QTY P/N A* B* DESCRIPTION

40 6 62-0177 Screw, Sockethead, M5x16
4 1 9 2- 62-0 793 Lock Washer #10
42 1 61-6318 Cover Plate
43 1 41-3175 Gasket, Nylon
44 1 62-0274 Orifice
45 1 66-0204 O-Ring, Fluoroelast. #141
4 6 2 4 -21- 300 6 Dowel Pin, 1/8”x3/8”
47 1 61-6350 Exhaust Stage
48 1 61-6058 Exhaust Valve
49 1 61-6057 Bypass Valve
50 1 61-6305 Spring, Exhaust Valve
51 1 61-6348 Holder, Exhaust Valve
5 2 2 2 -69- 6108 Lock Washer #8
53 2 62-0271 Screw, Sockethead, M4x6

Used on:

- 79203-10

ITEM QTY P/N A* B* DESCRIPTION

54 2 61-6052 Vane, Exhaust

55 4 41-2996 Vane Spring
56 2 61-6051 Vane, Intake
57 1 41-2732 Key Coupling
58 1 61-6039 Rotor
59 1 66-0207 O-Ring, Fluoroelast. #149
60 1 41-3390 Lip Seal, 3/4”
61 2 61-9280A Dowel Pin, 1/4”
62 1 61-6316 Intake Stage
63 1 41-0643 Gasket
64 1 61-6055 Lip Seal Housing
65 1 61-6042 Lip Seal .669”
66 1 41-2730 Coupling
67 3 62-0262 Screw, Sockethead, M5x20

32

A*: MAJOR REPAIR KIT CAT # N/A
B*: MINOR REPAIR KIT CAT # N/A

67-1407

Sheet 1 of 2

Rev. 3 11/03

Used on:

- 79203-10

- 79203-20

- 79203-30

P ARTS LIST 61-6443 OIL CASE ASSEMBL Y

ITEM QTY P/N A* B* DESCRIPTION

69 2 62-1014 Screw, Countersunk, 8-32 x 3/8”
70 1 61-6009 Window Holder
71 1 61-6027 Window Glass
72 1 66-0305 O-Ring, Fluoroelast. #130
73 1 61-2278 Drain Valve
74 1 61-6442 Oil Case
75 1 62-0212 O-Ring, Fluoroelast. #119
77 1 61-6020 Oil Fill Plug

67-1637
Sheet 1 of 2

Rev. 2 6/04

33

Section 11: WARRANTY

This Cole-Parmer product is warranted to be free from defects in material and workmanship. This liability of Cole­Parmer under this warranty is limited to servicing, adjusting, repairing or replacing any unit or component part which
in the judgment of Cole-Parmer has not been misused, abused or altered in any way or damaged by ingestion of
foreign material causing impaired performance or rendering it inoperative. Foreign material includes solids, liquids,
corrosive gases and recondensed water or solvent vapor. No other warranties are expressed or implied. The
method of executing this warranty: servicing, adjusting, repairing or replacing shall be at the discretion of Cole­Parmer Vacuum pumps that have been operated within a vacuum system, or other system, for any period, however
short, will be repaired under this warranty rather than replaced.

The warranty is effective for one year from the date of original purchase when:

1. The warranty card has been completed and returned.

2. The product is returned to the factory or other designated service centers, freight prepaid.

3. The product in our judgment is defective through no action or fault of the user .

If the product has become defective through misuse, abuse, alteration or ingestion of foreign materials, repairs will be
billed regardless of the age of the product. In this event, an estimate of the repair costs will be submitted and
authorization of these charges will be required before the product is repaired and returned.

34

35

36

37

383940

Cole-Parmer Instrument Company
625 East Bunker Court
Vernon Hills, IL 60061-1844
Phone: [phone]
Fax: [phone]
E-Mail: [e-mail]
Web-Page: www.coleparmer.com