Gast 6066 SERIES Manual

General information
• Model numbers ending in “X” have
automatic thermal protectors which
protect the motor by shutting the
motor off if it overheats. The motor
will automatically restart once the
motor has cooled.
WARNING
PLEASE READ THIS MANUAL COMPLETELY BEFORE INSTALLING AND USING
THIS MOTOR. SAVE THIS MANUAL FOR FUTURE REFERENCE AND
KEEP IN THE VICINITY OF THE MOTOR.
OI - ESS ROTARY VANE 6066 SERIES
VACUUM PUMPS & COMPRESSORS
OPERATION & MAINTENANCE MANUA
Product Use Criteria:
• Pump only clean, dry air.
• Operate at 32ºF - 104ºF (0ºC - 40ºC).
• Protect unit from dirt & moisture.
• Do not pump flammable or explosive gases or
use in an atmosphere that contains such gases.
• Protect all surrounding items from exhaust air. This
exhaust air can become very hot.
• Corrosive gases and particulate material will
damage unit. Water vapor, oil-based contaminants
or other liquids must be filtered out.
• Consult your Gast Distributor before using at high
altitudes.
• Oil- ess rotary-vanes require NO lubrication.
• Sealed bearings are grease packed.
• Use of petroleum or hydrocarbon products will
reduce carbon-vane service life.
Thank you for purchasing this Gast product. It is manufactured to the highest standards
using quality materials. Please follow all recommended maintenance, operational
and safety instructions and you will receive years of trouble free service.
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ISO 9001 & 14001 CERTIFIED
®Registered Trademark/™Trademark of Gast Manufacturing Inc., Copyright ©2003 Gast Manufacturing Inc. All Rights Reserved.
PART NO. 70 - 700 G425P (REV-F)

Motor Control
It is your responsibility to contact a qualified
electrician to assure that the electrical installation is ade-
quate and in conformance with all national and local codes
and ordinances.
Determine the correct overload setting required to protect
the motor (see motor starter manufacturerʼs recommenda-
tions). Select fuses, motor protective switches or thermal
protective switches to provide protection. Fuses act as
short circuit protection for the motor, not as protection
against overload. Incoming line fuses help to withstand
the motorʼs starting current. Motor starters with thermal
magnetic overload or circuit
breakers protect motor from overload or reduced
voltage conditions.
The wiring diagram supplied with the product provides
required electrical information. Check that power source is
correct to properly operate the dual-voltage motors.
Correct installation is your responsibility. Make sure you
have the proper installation conditions and that installa-
tion clearances do not block air flow. Proper guards
should be installed to prevent contact with moveable
parts of this pump. Do Not lift the unit by the fan shroud.
The unit should be lifted by means of the eye bolt.
Blocking air flow over the product in
any way can cause the product to overheat.
Some models are equipped with glass
jars. Proper measures should be taken to guard against
the fragmenting or braking of glass if an alternative mate-
rial is not used. If hazard is ignored severe personal
injury or death can occur.
INSTA ATION
Accessories
The productʼs internal intake and exhaust filters will pro-
vide adequate filtration in most applications. Check filters
periodically and replace when necessary. All units should
have an intake and exhaust filter to prevent contaminants
from entering the pump or the pneumatic system. Please
consult your Gast Distributor/Representative for additional
filter recommendations.
c
Disconnect electrical power at the circuit breaker
or fuse box before installing this product.
Install this product where it will not come into
contact with water or other liquids.
Install this product where it will be weather
protected.
Electrically ground this product.
Failure to follow these instructions can result in
death, fire or electrical shock.
WARNING
Electrical Shock Hazard
Plumbing
Remove plugs from the IN and OUT ports. Connect with
pipe and fittings that are the same size or larger than the
productʼs threaded ports.
Install relief valves and gauges at inlet or outlet, or both, to
monitor performance. Check valves may be required to
prevent back streaming through the pump.
WARNING
DANGER
Your safety and the safety of others
is extremely important.
Wehave provided many important safety messages
in this manual and on your product. Always read
and obey all safety messages.
This is the safety alert symbol. This symbol
alerts you to hazards that can kill or hurt you and
others. The safety alert symbol and the words
“DANGER” and “WARNING” will precede all safety
messages. These words mean:
You will be killed or seriously injured if you don’t
follow instructions.
You can be killed or seriously injured if you don’t
follow instructions.
All safety messages will identify the hazard, tell you
how to reduce the chance of injury, and tell you
what can happen if the safety instructions are not
followed.
2
Grounded Plug
Grounding Pin
Grounded Outlet
120-volt grounded connectors
shown. 220/ 240-volt grounded
connectors will differ in shape.
DIAGRAM A
Electrical Connection
Mounting
This product can be installed in any orientation. Mounting the
product to a stable, rigid operating surface and using shock
mounts will reduce noise and vibration.
CAUTION
WARNING

Start Up
If motor fails to start or slows down significantly under
load, shut off and disconnect from power supply. Check
that the voltage is correct for motor and that motor is
turning in the proper direction. Vane life will be drastical-
ly reduced if motor is not operating properly. Vanes can
break or be damaged if motor/pump runs in the wrong
direction.
OPERATION
Use only recommended air handling parts
acceptable for pressure not less than 70 psi..
Keep fingers and objects away from openings and
rotating parts.
When provided, motor terminal covers must be in
place for safe operation.
Check that coupling guard and shroud are in place
before operating.
Product surfaces may become hot during operation,
allow product surfaces to cool before handling.
Do Not direct air stream at body. Air stream from
product may contain solid or liquid material that can
result in eye or skin damage, wear proper eye
protection.
Do Not spray flammable or combustible liquid.
Wear hearing protection. Sound level from product
may exceed 85 dBA.
Failure to follow these instructions can result in
burns, eye injury or other serious injury.
WARNING
Injury Hazard
Install proper safety guards as needed. Pumps with
glass jars need safety guards to protect against
breaking glass.
Check with a qualified electrician or serviceman if the
grounding instructions are not completely understood,
or if you are not sure whether the product is properly
grounded. Do not modify the plug provided. If it will not
fit the outlet, have the proper outlet installed by a quali-
fied electrician.
Model that is permanently wired:
This product must be connected to a grounded, metal-
lic, permanent wiring system, or an equipment ground-
ing terminal or lead on the product.
Power supply wiring must conform to all required safety
codes and be installed by a qualified person. Check
that supply voltage agrees with that listed on product
nameplate.
Be sure the 3-phase motor turns in the proper direction
of rotation after installation. Turning in the wrong direc-
tion will drastically reduce vane life.
Extension cords:
Use only a 3-wire extension cord that has a 3-blade
grounding plug. Connect extension cord plug to a
matching 3-slot receptacle. Do not use an adapter.
Make sure your extension cord is in good condition.
Check that the gage wire of the extension cord is the
correct size wire to carry the current this product will
draw.
Minimum gage for extension cords
Amps Volts ength of cord in feet
120v 25 50 100 150 200 250 300 400 500
240v 50 100 200 300 400 500 600 800 1000
0-2 18 18 18 16 16 14 14 12 12
2-3 18 18 16 14 14 12 12 10 10
3-4 18 18 16 14 12 12 10 10 8
4-5 18 18 14 12 12 10 10 88
5-6 18 16 14 12 10 10 888
6-8 18 16 12 10 10 8666
8-10 18 14 12 10 88664
10-12 16 14 10 886644
12-14 16 12 10 866642
14-16 16 12 10 866442
16-18 14 12 8864422
18-20 14 12 8664422
It is your responsibility to operate this product at recom-
mended pressures or vacuum duties and room ambient
temperatures. Do Not start against a vacuum or pres-
sure load.
Model with a power supply cord:
This product must be grounded. For either 120-volt or
220/240-volt circuits connect power supply cord ground-
ing plug to a matching grounded outlet. Do not use an
adapter. (See DIAGRAM A)
In the event of an electrical short circuit, grounding
reduces the risk of electric shock by providing an escape
wire for the electric current. This product may be
equipped with a power supply cord having a grounding
wire with an appropriate grounding plug.
The plug must be plugged into an outlet that is properly
installed and grounded in accordance with all local codes
and ordinances.
3

SHUTDOWN PROCEDURES
It is your responsibility to follow proper shutdown pro-
cedures to prevent product damage.
NEVER ADD OI TO THIS OI - ESS PUMP.
4
It is your responsibility to:
• Regularly inspect and make necessary repairs to
product in order to maintain proper operation.
• Make sure that pressure and vacuum is released
from product before starting maintenance.
Flushing
Flushing this product to remove excessive dirt, foreign
particles, moisture or oil that occurs in the operating
environment will help to maintain proper vane perform-
ance. If your pump is not getting the vacuum or pres-
sure level expected, flushing is required. Vanes will
stick when dirty and may cause pump to be noisy or
inefficient.
Use only Gast recommended Solvent or other non-
petroleum based flushing solvent. Do Not use kerosene
or ANY other combustible solvent to flush product.
Check that all external accessories such as relief valves
and gauges are attached to cover and are not damaged
before re-operating product.
1. Disconnect electrical power supply.
2. Release all pressure and vacuum from pump.
3. Remove all accessories at the inlet and exhaust
ports.
4. Remove filter.
5. Start product. Place towel over exhaust port to
clean up solvent. Spray Gast recommended solvent
for 5-10 seconds into inlet port.
6. Block the inlet port and draw a deep vacuum for
15-20 seconds. Release the vacuum.
7. isten for changes in the sound of the motor. If
motor sounds smooth, go to next step. If motor
does not sound like it is running smoothly, repeat
steps 5 and 6 until you can hear a difference in the
operating sound of the pump.
8. Start the pump and let it run for 1 minute, then turn
pump off.
9. Replace all accessories at the inlet and exhaust
ports.
10. Replace filter before resuming operation.
Check intake and exhaust filters after first 500 hours of
operation. Clean filters and determine how frequently
filters should be checked during future operation. This
one procedure will help to assure the productʼs perform-
ance and service life.
Clean filters when necessary by removing and washing
in a solvent or soap and water. After cleaning, dry with
compressed air to make sure all moisture is removed
before replacing filters.
Proper shutdown procedures must be followed to pre-
vent pump damage. Failure to do so may result in pre-
mature pump failure. The Gast Manufacturing Rotary
Vane Oil- ess Vacuum Pumps and Compressors are
constructed of ferrous metals or aluminum which are
subject to rust and corrosion when pumping condensa-
ble vapors such as water. Follow the steps below to
assure correct storage and shutdown between operating
periods
1. Disconnect plumbing.
2. Operate product for at least 5 minutes without
plumbing.
3. Run at maximum vacuum for 10-15 minutes.
4. Repeat step 2.
5. Disconnect power supply.
6. Plug open ports to prevent dirt or other
contaminants from entering product.
Air stream from product may contain solid or liquid
material that can result in eye or skin damage.
Flush this product in a well ventilated area.
Do Not use kerosene or other combustible solvents
to flush this product.
WARNING
Injury Hazard
Wear eye protection when flushing this product.
Failure to follow these instructions can result in
eye injury or other serious injury.
MAINTENANCE
c
Disconnect electrical power supply cord before
performing maintenance on this product.
If product is hard wired into system, disconnect
electrical power at the circuit breaker or fuse box
before performing maintenance on this product.
Failure to follow these instructions can result in
death, fire or electrical shock.
Electrical Shock Hazard
WARNING
3

Disassembly
1. Remove the dead end shroud , fan and fan spacer.
2. Use a wheel puller to remove the dead-end plate
and bearing from the pump body. Note the
direction of the bevel edge on the vane. Do not
damage the dowel pins between the end plate and
the body. Save the bearing spacer on the dead-
end of the shaft for reassembly. Remove the
snap ring from the end plate. Save the snap ring,
belleville springs and washer for reassembly.
3. Remove the bearing from the dead-end plate.
4. Check the exposed surfaces of the rotor, body, and
end plate for scoring. If you find no scoring, you can
perform a Minor Rebuild to replace only the vanes
and the dead-end bearing. If you find severe
damage, perform the Major Rebuild.
5
Minor Rebuild
5. Install the new vanes supplied with the kit. Be
careful to face the vane bevels in the proper
direction (as noted in step 2).
6. Place end plate over the shaft with dowel pins
aligned. Place bearing spacer on dead end of
shaft. Place the new bearing in its bore in the
dead end plate. Be careful to press only on the
inner bearing race.
7. Install and tighten the pump body bolts, install the
belleville springs with the washer between them
and the snap ring.
Major Rebuild
5. Remove the drive end cap. Use a wheel puller to
remove the drive-end plate and bearing from the
body. Do not remove or damage the dowel pins
in the body. Save the bearing spacer and end plate
gasket for reassembly.
6. Place one shoulder ring in its seat in the drive-end
plate, then place one of the new bearings in the
seat. Using an arbor press, press the bearing onto
the shaft. Be careful to press only on the inner
bearing race. Tighten the pump body bolts.
7. Install the new vanes supplied with the kit. Be
careful to face the vane bevels in the proper
direction (as noted in step 2).
8. Perform step #6 from Minor Rebuild.
9. Install the belleville springs with the washer between
them and the snap ring. Install and tighten the
pump body bolts.
10. Apply a thread-lock adhesive and start the drive-
end cap into its thread in the drive-end plate, but
do not tighten it.
11. Place a dial indicator against the dead-end of the
shaft to measure axial movement.Tighten the drive-
end cap until the indicator shows:
.002” - .003” of shaft movement against the belleville
springs.
12. Clean and reinstall filter(s).
Gast will NOT guarantee field-rebuilt product per-
formance. For performance guarantee, the product
must be returned to a Gast Authorized Service
Facility.
Service Kit contents vary. Most contain vanes, gaskets
and filter parts.
SERVICE KIT INSTA ATION
c
Disconnect electrical power supply cord before
installing Service Kit.
If product is hard wired into system, disconnect
electrical power at the circuit breaker or fuse box
before installing Service Kit.
Disconnect air supply and vent all air lines to
release pressure or vacuum.
Failure to follow these instructions can result in
death, fire or electrical shock.
WARNING
Electrical Shock Hazard
Do Not attempt to remove the rotor. It is held in
place by Loctite and can only be serviced by a Gast
Authorized Service Facility.
Do Not loosen or ad ust motor thru-bolts to prevent
misalignment and damage to the pump.

REF DESCRIPTION QTY PART # PART #
NO. 6066-P102 6066-V103
1 BODY 1 AC309 AC309
2 DRIVE END P ATE 1 AE293 AE293
3 DEAD END P ATE 1 AE294 AE294
4 ROTOR ASSEMB Y 1 AE295A AE295A
5∆VANE 4 AK738 AK738
6 ∆ BEARING 2 AB964B AB964B
7 BEARING SHOU DER RING 2 AB926T AB926T
8 BE EVI E SPRING 2 AB791 AB791
9 SHIM WASHER 1 AB792 AB792
10 RETAINING RING 1 AB793 AB793
11 END CAP 1 AB790 AB790
12 FAN 2 A 443 A 443
14 SQUARE KEY 2 AB136A AB136A
15 SHROUD 2 AE300A AE300A
16 FAN GUARD ASSM, DRIVE 1 AK736 AK736
17 IFAN GUARD ASSM, DEAD 1 AK737 AK737
18 INTAKE FI TER ASSEMB Y 1 AD560 AD560
19 MUFF ER ASSEMB Y 1- AD560C
20 ∆ COVER GASKET 1 AD562
2 AD562
21 JAR 1 AD563A
2 AD563A
22 FI TER E EMENT ASSEMB Y 1 AD750
2 AD750
23 ∆ FI TER FE T 1 AD752
2 AD752
24 BODY SPACER 1 AE315B
2 AE315B
25 KEY, COUP ING 1 AE136D AE136D
26 COUP ING ASSEMB Y 1 AE765 AE765
27 CHECK VA VE (NOT SHOWN) 1 AH326B AH326B
*** SERVICE KIT (NOT SHOWN) 1 K503 K503
∆Denotes parts in the service kit.
Parts listed are for stock models.
For specific OEM models, contact
the factory.
When corresponding or ordering
parts, please give complete model
number and serial number.
EXP ODED VIEW AND PARTS ORDERING INFORMATION
6

7
Gast finished products, when properly installed and operated under normal conditions of use, are warranted by Gast to
be free from defects in material and workmanship for a period of twelve (12) months from the date of purchase from
Gast or an authorized Gast Representative or Distributor. In order to obtain performance under this warranty, the buyer
must promptly (in no event later than thirty (30) days after discovery of the defect) give written notice of the defect to
Gast Manufacturing Incorporated, PO Box 97, Benton Harbor Michigan USA 49023-0097 or an authorized Service
Center (unless specifically agreed upon in writing signed by both parties or specified in writing as part of a Gast OEM
Quotation). Buyer is responsible for freight charges both to and from Gast in all cases.
This warranty does not apply to electric motors, electrical controls, and gasoline engines not supplied by Gast. Gast’s
warranties also do not extend to any goods or parts which have been subjected to misuse, lack of maintenance,
neglect, damage by accident or transit damage.
THIS EXPRESS WARRANTY EXCLUDES ALL OTHER WARRANTIES OR REPRESENTATIONS EXPRESSED OR
IMPLIED BY ANY LITERATURE, DATA, OR PERSON. GAST’S MAXIMUM LIABILITY UNDER THIS EXCLUSIVE
REMEDY SHALL NEVER EXCEED THE COST OF THE SUBJECT PRODUCT AND GAST RESERVES THE RIGHT,
AT ITS SOLE DISCRETION, TO REFUND THE PURCHASE PRICE IN LIEU OF REPAIR OR REPLACEMENT.
GAST WILL NOT BE RESPONSIBLE OR LIABLE FOR INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
however arising, including but not limited to those for use of any products, loss of time, inconvenience, lost profit, labor
charges, or other incidental or consequential damages with respect to persons, business, or property, whether as a
result of breach of warranty, negligence or otherwise. Notwithstanding any other provision of this warranty, BUYER’S
REMEDY AGAINST GAST FOR GOODS SUPPLIED OR FOR NON-DELIVERED GOODS OR FAILURE TO FURNISH
GOODS, WHETHER OR NOT BASED ON NEGLIGENCE, STRICT LIABILITY OR BREACH OF EXPRESS OR
IMPLIED WARRANTY IS LIMITED SOLELY, AT GAST’S OPTION, TO REPLACEMENT OF OR CURE OF SUCH
NONCONFORMING OR NON-DELIVERED GOODS OR RETURN OF THE PURCHASE PRICE FOR SUCH GOODS
AND IN NO EVENT SHALL EXCEED THE PRICE OR CHARGE FOR SUCH GOODS. GAST EXPRESSLY DISCLAIMS
ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE OR PURPOSE WITH RESPECT
TO THE GOODS SOLD. THERE ARE NO WARRANTIES WHICH EXTEND BEYOND THE DESCRIPTIONS SET
FORTH IN THIS WARRANTY, notwithstanding any knowledge of Gast regarding the use or uses intended to be made
of goods, proposed changes or additions to goods, or any assistance or suggestions that may have been made by Gast
personnel.
Unauthorized extensions of warranties by the customer shall remain the customer’s responsibility.
CUSTOMER IS RESPONSIBLE FOR DETERMINING THE SUITABILITY OF GAST PRODUCTS FOR CUSTOMER’S
USE OR RESALE, OR FOR INCORPORATING THEM INTO OBJECTS OR APPLICATIONS WHICH CUSTOMER
DESIGNS, ASSEMBLES, CONSTRUCTS OR MANUFACTURES.
This warranty can be modified only by authorized Gast personnel by signing a specific, written description of any
modifications.
WARRANTY

TROUB ESHOOTING CHART
ow High Pump Motor Reason and remedy
Vacuum Pressure Vacuum Pressure Overheat Overload for problem.
• • At pump ••Filter dirty.
Clean or replace.
• At pump ••Muffler dirty.
Clean or replace.
• At pump ••Vacuum line collapsed.
Repair or replace.
••••Relief valve set too high.
Inspect and adjust.
•• Relief valve set too low.
Inspect and adjust.
••At pump At pump • • Plugged vacuum/pressure line.
Inspect and repair.
•• Vanes sticking.
Clean or replace.
•• Vanes worn.
Replace.
•• Shaft seal worn.
Replace.
•• ••Dust or offset powder in pump.
Inspect and clean.
•• • Motor not wired correctly.
Check wiring diagram and line voltage.
• • • • Running at too high an RPM.
Check wiring diagram and line voltage.
www.gastmfg.com
ISO 9001 & 14001 CERTIFIED
We have Gast Certified Service Centers throughout the world. For the most up-to-date
listing, contact one of our sales offices below:
Gast Hong Kong
Room 6,9/F
New Commerce Centre
19 on Sum Street, Shatin
N. T. Hong Kong
Ph: (852) 2690 1066
Fax: [phone]
www.gasthk.com
European Sales & Service Headquarters
Gast Group imited
A Unit of IDEX Corporation
Unit 11, The I O Centre
Nash Road
Redditch B98 7AS
United Kingdom
Tel: [phone]
Fax: [phone]
www.gastmfg.com
www.jun-air.com
Gast Manufacturing, Inc.
P.O. Box 97
2300 S. Highway M139
Benton Harbor, MI 49022
Ph: 269/926-6171
FAX: [phone]
www.gastmfg.com