Gardner Denver DuroFlow 45 Series Service manual

PARTS LIST
OPERATING AND
SERVICE MANUAL
D--9--611
Version 03
November, 2005
Models:
GGD_ _D_
45 SERIES
BLOWERS

D--9--611 Page i
MAINTAIN BLOWER RELIABILITY AND PERFORMANCE
WITH GENUINE DUROFLOW PARTS AND SUPPORT SERVICES
FROM GARDNER DENVER
Factory genuine parts, manufactured to design toler-
ances, are developed for optimum dependability ------
specifically for your blower. Design and material innova-
tions are born from years of experience with hundreds
of different blower applications. When you specify
factory genuine parts you are assured of receiving parts
that incorporate the most current design advancements
. . . manufactured in our state--of--the--art blower factory
under exacting quality standards.
Your AUTHORIZED DISTRIBUTOR offers all the
backup you require. A worldwide network of authorized
distributors provides the finest product support in the
blower industry.
Your AUTHORIZED DISTRIBUTOR can support your
blower investment with these services:
1. Trained parts technical representatives to assist
you in selecting the correct replacement parts.
2. Complete inventory of new machines and new,
genuine factory parts.
3. A full line of factory tested AEONtPD Synthetic
Blower Lubricants specifically formulated for opti-
mum performance in all blowers.
4. Authorized Distributor service technicians are
factory-trained and skilled in blower maintenance
and repair. They are ready to respond and assist
you by providing fast, expert maintenance and
repair services.
For the location of your local authorized DuroFlow blower distributor refer to the yellow pages of your
phone directory, check the Web site at www.gardnerdenver.com or contact:
Gardner Denver Compressor Division
1800 Gardner Expressway
Quincy, IL 62305
Phone: [phone]
Fax: [phone]
REMANUFACTURED BLOWERS
Whenever a DuroFlow blower requires replacement or
repair, Gardner Denver offers an industry unique, fac-
tory remanufactured blower exchange program. From
its modern Remanufacturing Center in Indianapolis, IN,
Gardner Denver is committed to supplying you with the
highest quality, factory remanufactured DuroFlow
blowers that are guaranteed to save you time, aggrava-
tion and money.
Immediately Available
Repair downtime costs you money, which is why
Gardner Denver maintains a large inventory of reman-
ufactured blowers at all times, ready for immediate
delivery.
Skilled Craftsmen
Our Remanufacturing assembly technicians average
over 20 years experience with air compression products.
Precision Remanufacturing
All potentially usable parts are thoroughly cleaned,
inspected and analyzed. Only those parts that can be
brought back to original factory specifications are
remanufactured. Every remanufactured DuroFlow
blower receives a new overhaul kit: bearings, seals,
sleeves and gaskets.
Extensive Testing
Gardner Denver performs testing that repair houses
just don’t do. Magnaflux and ultrasonic inspection spot
cracked or stressed castings, monochromatic light
analysis exposes oil leaks, coordinate measurement
machine inspects to +/-- .0001”, and slip and hot run
testing insure that all remanufactured DuroFlow
blowers meet factory performance specifications.
Latest Technology
Factory remanufactured DuroFlow blowers incorporate
all of the latest new blower design improvements.
Warranty
Gardner Denver backs up every remanufactured blow-
er with a new warranty . . . 18 months from purchase,
12 months from service.
Gardner Denver remanufactured air ends deliver
quality without question ...yearinandyearout.

D--9--611 Page ii
GARDNER DENVER LUBRICANT ORDER INFORMATION
Re--order Part Numbers for Factory--Recommended Lubricants.
AEON PD Synthetic Lubricant or AEON PD--Food Grade Synthetic Lubricant
AEON PD Synthetic Lubricant
Description Part Number
1 Quart 28G23
Case/12Quarts 28G24
5 Gallon Pail 28G25
55 Gallon Drum 28G28
AEON PD--Food Grade Synthetic Lubricant
Description Part Number
1 Quart 28H97
Case/12Quarts 28H98
5 Gallon Pail 28H99
55 Gallon Drum 28H100
Call your local Duroflow Distributor to place your order for Gardner Denver lubricants. Your
Authorized Gardner Denver Distributor is:

D--9--611 Page iii
FOREWORD
DuroflowRblowers are the result of advanced engineering and skilled manufacturing. To be assured of receiving
maximum service from this machine, the owner must exercise care in its operation and maintenance. This book is
written to give the operator and maintenance department essential information for day-to-day operation, mainte-
nance and adjustment. Careful adherence to these instructions will result in economical operation and minimum
downtime.
Danger is used to indicate the presence of a hazard which will cause severe personal
injury, death, or substantial property damage if the warning is ignored.
Warning is used to indicate the presence of a hazard which can cause severe
personal injury, death, or substantial property damage if the warning is ignored.
Caution is used to indicate the presence of a hazard which will or can cause minor
personal injury or property damage if the warning is ignored.
Notice is used to notify people of installation, operation or maintenance information
which is important but not hazard--related.

D--9--611 Page iv
SAFETY PRECAUTIONS
Safety is everybody’s business and is based on your use of good common sense. All situations or circumstances
cannot always be predicted and covered by established rules. Therefore, use your past experience, watch out for
safety hazards and be cautious. Some general safety precautions are given below:
Failure to observe these notices could result in injury to or death of personnel.
DKeep fingers and clothing away from blower inlet and discharge ports,
revolving belts, sheaves, drive coupling, etc.
DDo not use the air discharge from this unit for breathing -- not suitable for
human consumption.
DDo not loosen or remove the oil filler plug, drain plugs, covers, or break any
connections, etc., in the blower air or oil system until the unit is shut down
and the air pressure has been relieved.
DElectrical shock can and may be fatal.
DBlower unit must be grounded in accordance with the National Electrical
Code. A ground jumper equal to the size of the equipment ground conductor
must be used to connect the blower motor base to the unit base.
DOpen main disconnect switch, tag and lockout before working on the control.
DDisconnect the blower unit from its power source, tag and lockout before
working on the unit -- the machine may be automatically controlled and may
start at any time.
Failure to observe these notices could result in damage to equipment.
DStop the unit if any repairs or adjustments on or around the blower are
required.
DDisconnect the blower unit from its power source, tag and lockout before
working on the unit -- the machine may be automatically controlled and may
start at any time.
DDo not exceed the rated maximum speed shown on the nameplate.
DDo not operate unit if safety devices are not operating properly. Check
periodically. Never bypass safety devices.

D--9--611 Page v
TABLE OF CONTENTS
Page
Maintain Blower Reliability and Performance with Genuine DuroFlow Parts and Support Services i............
Remanufactured Blower Program (see page 17 for complete details) i.....................................
Gardner Denver Lubricant Order Information ii..........................................................
Foreword iii........................................................................................
Safety Precautions iv...............................................................................
Index vi...........................................................................................
List of Illustrations vii................................................................................
Matrix/Menu 1......................................................................................
Introduction
Your Key To Trouble Free Service 2..............................................................
Important Duroflow Telephone Numbers 2........................................................
Section 1, General Information
Inspection 3..................................................................................
Removing Protective Materials At Start--up 3......................................................
Storage 3....................................................................................
Blower Mounting Configurations 4...............................................................
Outline 5.....................................................................................
Blower Outline Dimension Chart 6...............................................................
Section 2, Installation
Location 7....................................................................................
Foundation and Base 7........................................................................
Mounting Configurations 7......................................................................
Drive Installation 7.............................................................................
Piping 9......................................................................................
Duroflow Inlet and Discharge Connectors 9.......................................................
Section 3, Lubrication
Recommended Lubricant 10....................................................................
Lubrication Instructions 10......................................................................
Section 4, Operation
Limitations 13.................................................................................
Safety Precautions 13..........................................................................
Blower Startup Checklist 15.....................................................................
Section 5, Maintenance And Troubleshooting
Key Points for Long Blower Life 16...............................................................
Trouble Shooting 16...........................................................................
Section 6, Service Options
Factory Remanufactured Blower Program 18......................................................
Parts Ordering Instructions 19...................................................................
Overhaul Kits 19..............................................................................
Section 7, Parts Lists And Exploded Views
45 Series Duroflow Blower 20...................................................................
45 Series Duroflow Blower -- Model 4518 Blower 22................................................
Warranty 24........................................................................................
Warranty Registration Last Page......................................................................

D--9--611 Page vi
INDEX
AEON PD Food Grade Lubricant Part Numbers 10.
AEON PD Lubricant Part Numbers 10............
Air Seal Vent Systems 11.......................
Alignment, Belt Drive 9.........................
Base and Foundation 7.........................
Belt Drive Alignment 9..........................
Blower Startup Checklist 15.....................
Checklist, Blower Startup 15.....................
Drive Installation 7.............................
Belt Drive Alignment 9......................
Driver Location 9...........................
Overhung Load Calculations and Limitations 7..
Driver Location 9...............................
Factory Remanufactured Blower Program 18......
Foreword iii....................................
Foundation and Base 7.........................
Gaskets, Inlet and Outlet 19.....................
GENERAL INFORMATION, SECTION 1 3........
INSTALLATION, SECTION 2 7..................
Installation, Location 7..........................
Key Points for Long Blower Life 16...............
Limitations, Operation 13........................
Location, Installation 7..........................
Lubricant, Recommended 10....................
Lubricant Order Information, Gardner Denver ii....
LUBRICATION, SECTION 3 10..................
Lubrication Instructions 10.......................
Lubrication Service
Air Seal Vent Systems 11....................
Oil Sump Breathing System 11...............
MAINTENANCE AND TROUBLESHOOTING,
SECTION 5 16.............................
Matrix/Menu 1.................................
Mounting Configurations 7.......................
Oil Sump Breathing System 11...................
OPERATION, SECTION 4 13....................
Overhaul Kits 19...............................
Overhung Load Calculations and Limitations 7.....
PARTS LISTS AND EXPLODED VIEWS,
SECTION 7 20.............................
Parts Ordering Instructions 19...................
Piping 9.......................................
Precautions, Safety iv, 13........................
Product Support, DuroFlow i.....................
Recommended Lubricant 10.....................
Remanufactured Blower Program, Factory i, 18.....
Repair Parts 18................................
Safety Precautions iv, 13........................
SERVICE OPTIONS, SECTION 6 18.............
Startup Checklist, Blower 15.....................
Storage 3.....................................
Storage Kits 19................................
Trouble Shooting 16............................
Warranty 24...................................
Warranty Registration Last Page.................
YOUR KEY TO TROUBLE FREE SERVICE,
INTRODUCTION 2.........................

D--9--611 Page vii
LIST OF ILLUSTRATIONS
D300GGD074--A
(Ref. Drawing)
Figure 1--1 Blower Configuration Changes 4.......................................................
Figure 1--2 Outline 5...........................................................................
Figure 1--3 Blower Outline Dimension Chart 6.....................................................
Figure 2--1 Belt Drive Overhung Load Limitations 8.................................................
Figure 2--2 Inlet and Discharge Connectors 9......................................................
Figure 3--1 Approximate Oil Capacities 10.........................................................
Figure 3--2 AEON PD Synthetic Lubricant 10......................................................
Figure 3--2 Viscosity Recommendation 12.........................................................
Figure 4--1 Maximum Operating Limitations 14.....................................................
EXPLODED VIEWS
45 Series Blower -- 304GGD810 20....................................................
45 Series Blower -- 305GGD810 -- Model 4518 22.......................................

D--9--611 Page 1
COLUMN 1 -- BASIC DESIGNATOR
COLUMN 2 -- PRODUCT FAMILY
G. INDUSTRIAL BLOWER
COLUMN 3 -- GEAR DIAMETER
D. 4.5” -- 45 Series
COLUMN 4 -- CASE LENGTH
45 Series
A. 4”
B. 6”
C. 9”
D. 12”
E. 18”
COLUMN 5 -- CONSTRUCTION
A. VERTICAL--TOP HAND--CENTRAL TIMED
B. VERTICAL--BOTTOM HAND--CENTRAL TIMED
C. HORIZONTAL--LEFT HAND--CENTRAL TIMED
D. HORIZONTAL--RIGHT HAND--CENTRAL TIMED
COLUMN 6 -- DESIGN VERSION
COLUMN 7 -- ADDITIONAL DESCRIPTION
A. STANDARD, NO MODIFICATION
* C. LEAK RESISTANT
* E. STEP--UP DRIVE
COLUMNS 8 THRU 11 -- MODIFICATION NUMBER *
* NOT INCLUDED IN THIS PUBLICATION, CONSULT FACTORY.
DUROFLOW BLOWERS -- 45 SERIES
MATRIX/MENU
NOTICE TO CUSTOMER -- To find the construction op-
tions for your blower unit, FILL IN THE BALANCE OF LET-
TERS OR NUMBERS FROM YOUR UNIT NAMEPLATE
COLUMN NUMBER:
FOLLOW THE LINE DOWN AND OVER FROM EACH
SPACE THUS FILLED IN TO FIND THE APPROPRIATE
CONSTRUCTION OPTION WITH WHICH YOUR MA-
CHINE IS EQUIPPED.
GGD D
__ __ __ __ __ __ __ __ __ __ __
1234567891011

D--9--611 Page 2
INTRODUCTION
YOUR KEY TO TROUBLE FREE SERVICE
Thank you for investing in DuroFlow quality. The
DuroFlow reputation for rugged dependability has been
earned by over 70 years of service in demanding,
industrial operations where downtime cannot be toler-
ated and efficient blower performance is expected.
Your DuroFlow blower is a precision engineered blower
that has been carefully manufactured and thoroughly
tested at the state-of-the-art Gardner Denver Blower
Factory in Sedalia, Missouri.
As with other precision machinery, there are several
relatively simple installation, operation and mainte-
nance procedures that you must observe to assure
optimum blower performance. There is no guesswork
in the manufacture of your highly advanced DuroFlow
blower and there must be none in preparing the blower
to get the job done in the field.
The purpose of this manual is to help you properly
install, operate and maintain your DuroFlow blower. It
is essential that you review all sections of this manual
in preparation for installing your blower. Follow the
instructions carefully and you will be rewarded with
trouble--free DuroFlow service . . . year in and year out.

D--9--611 Page 3
SECTION 1
GENERAL INFORMATION
INSPECTION
Before uncrating, check the packing slip carefully to be
sure all the parts have been received. All accessories
are listed as separate items on the packing slip, and
small important accessories such as relief valves can
be overlooked or lost. After every item on the packing
slip has been checked off, uncrate carefully. Register
a claim with the carrier for lost or damaged equipment.
The inlet and discharge openings are fitted with protec-
tive covers to prevent dirt and moisture from entering
the blower during shipping and installation.
Do not remove and dispose of the
covers until final checking and instal-
lation.
Covers are lined with a ”Corrosion Inhibitor” which will
inhibit rust for a period of six months. Retain covers for
use in reshipment or relocation of the unit.
Temporarily remove the protective covers and inspect
interior of air chamber for foreign material or heavy
rusting. Turn driveshaft to assure that lobes rotate
smoothly without binding. New blowers may be difficult
to turn by hand due to friction of the air seals. Once in
motion however, there should be no indication of inter-
ference between the rotors and the housing or end-
plates. Report any suspected mechanical problems
immediately to your authorized DuroFlow distributor.
REMOVING PROTECTIVE MATERIALS AT START--
UP
Blower inlet and discharge are temporarily capped to
keep out dirt and other contaminants during shipment.
These covers must be removed before start--up.
Failure to remove covers from blower
inlet and discharge prior to start--up
will cause machine damage.
STORAGE
Your DuroFlow blower was packaged at the factory with
adequate protection to permit normal storage for up to
six (6) months. Under the best of storage conditions
there is still a potential for damage to occur. Extended
storage preparation is available from the factory, prior
to shipment, at a small additional charge. If the unit is
to be stored under adverse conditions or for extended
periods of time, additional measures should be taken
to prevent unwarrantable damage.
1. Store the blower in a clean, dry area.
2. Make certain inlet and discharge air ports are
tightly covered to prevent foreign material from
entering the air chamber.
3. All exposed, non--painted surfaces should be
protected against rust and corrosion.
4. Make sure all vent breathers are in place.
5. Provide adequate protection to avoid accidental
mechanical damage.
6. In high humidity or corrosive environments, addi-
tional measures may be required to prevent
rusting of the internal surfaces. Mist spraying the
impellers and air chamber with a rust preventative
will protect these surfaces from rusting. To
prevent rusting of gears and bearings, add one
pint of VCI oil in each oil reservoir. (Ref. Part
Number 28H280 per quart).
7. Rotate shaft by hand weekly to prevent bearings
from taking a set and to keep seals soft.
Before running the blower, drain the
oil and replace to the proper operat-
ing level with clean, fresh lubricant.
Rotating components will cause
severe injury in case of personal
contact. Keep hands away from
blower inlet and discharge ports.

D--9--611 Page 4
FIGURE 1-- 1 -- BLOWER MOUNTING CONFIGURATIONS
SHAFT ROTATION KEY: CW = CLOCKWISE
CCW = COUNTERCLOCKWISE
NOTE: When changing configurations be sure to relocate the Oil Fill, Oil Drain and
Breather Filters into their proper position. 45 Series blowers require a
mounting foot change with a configuration change.
VERTICAL TOP ROTATES
LEFT TO BECOME
HORIZONTAL LEFT
VERTICAL BOTTOM ROTATES
LEFT TO BECOME
HORIZONTAL RIGHT

D--9--611 Page 5
FIGURE 1-- 2 -- OUTLINE

D--9--611 Page 6
BLOWER OUTLINE DIMENSION CHART
Dimensions
4504 4506 4509 4512 4518
A 17.84 21.34 24.34 27.34 33.42
B 16.37 16.37 16.37 16.37 16.37
C 10.50 10.50 10.50 10.50 12.12
D 3.13 4.63 4.63 4.63 4.63
E DIA. 1.4375 1.4375 1.4375 1.4375 1.4375
F 9.75 9.75 9.75 9.75 13.00
G 17.50 17.50 17.50 17.50 17.50
H 4.88 6.88 6.88 9.88 15.88
J 11.50 11.50 11.50 11.50 11.50
K 5.00 7.00 7.00 10.00 16.00
L 11.35 11.35 11.35 11.35 11.35
M 5.62 5.62 5.62 5.62 5.62
N 9.10 9.10 9.10 9.10 9.10
P 10.02 12.52 14.02 15.52 18.52
Q ****8”FLG
R 2.25 2.25 2.25 2.25 2.25
S 4.88 4.88 4.88 4.88 6.50
T DIA. .69 .69 .69 .69 .69
U 8.75 8.75 8.75 8.75 8.75
V 2.50 3.50 3.50 5.00 8.00
W 5.75 5.75 5.75 5.75 5.75
X 2.44 3.44 3.44 4.94 7.94
* See FIGURE 2--2, Page 9, for available connectors.
APPROXIMATE WEIGHT
MODEL 4504 4506 4509 4512 4518
LBS. 235 260 290 335 470
Models
FIGURE 1-- 3 -- BLOWER OUTLINE DIMENSION CHART

D--9--611 Page 7
SECTION 2
INSTALLATION
LOCATION
Whenever possible, install the blower in a clean and dry
place that is both well lighted and well ventilated.
Provide plenty of room for easy inspection and mainte-
nance.
FOUNDATION AND BASE
For permanent installations we recommend concrete
foundations be provided, and the equipment should be
grouted to the concrete. Use non--shrinking grout only.
It is necessary that a suitable base be used, such as
steel combination base under the blower and motor, or
a separate sole plate under each. The blower feet must
be 100% supported. Before grouting, equipment must
be leveled, free of all strains, and anchored so no
movement will occur during curing of grout. After grout
has completely hardened, a recheck is necessary to
compensate for shrinkage. If required, add shims
under blower feet after final tightening of foundation
anchor bolts to remove strain from the blower housing.
Where jack screws or wedges are used during grout-
ing, they must be backed off or removed before final
tightening of anchor bolts.
Where a concrete foundation is not feasible, care must
be taken to insure that equipment is firmly anchored to
adequate structural members. The blower must be
installed on a flat, level surface and bolted down evenly
to prevent warping or strain. Internal clearances are
very critical and serious damage or failure can result
from housing distortion.
If the unit is not flat within .002 of an
inch, it will be necessary to shim the
blower feet at installation.
MOUNTING CONFIGURATIONS
All DuroFlow blowers are center timed allowing rotation
in either direction.
DuroFlow blowers are shipped in the vertical configura-
tion (horizontal airflow.) If a horizontal configuration is
desired, the blower can be laid on its side after reposi-
tioning breathers, oil filler drain plugs and mounting feet
as indicated in the installation drawing, FIGURE 1-- 2,
page 5. To assure proper lubrication, the blower
must be laid over in the direction that places the oil
sight glass(es) below the horizontal centerline of
the blower. See FIGURE 1-- 1, page 4, for additional
configuration information.
When converting 45 series blowers from vertical to
horizontal configurations, the horizontal mounting feet
are required. Order horizontal mounting feet from your
DuroFlow Distributor.
The blower must be mounted level with the driveshaft
in the horizontal position. The 45 series blowers have
interconnected oil sumps and operation in an out--of--
level condition will result in inadequate lubricant dis-
tribution and subsequent premature blower failure.
DRIVE INSTALLATION
When selecting a V--belt drive, check to be sure the
shaft overhung load limitation is not exceeded.
Overhung Load Calculations and Limitations -- A n
excessive overhung condition exists when the belt pull
on the blower shaft exceeds the maximum allowable
moment listed in “Maximum Allowable Moment” chart
in FIGURE 2--1, page 8. Excessive overhung load
conditions must be avoided or bearing failure and shaft
breakage will result.
Exceeding overhung load limitations
leads to unwarrantable premature
bearing failure and shaft breakage.
The location of the sheave on the blower shaft greatly
affects the stress in the shaft. The optimum blower
sheave positioning is as close as possible to the blower
drive cover, not to exceed dimension “C” shown in max-
imum allowable moment chart, FIGURE 2--1, page 8.
To calculate the shaft moment for a given V--belt drive
arrangement, first calculate the belt pull using the
formula for belt pull in FIGURE 2--1, page 8. Insert the
calculated belt pull into the formula for calculation of
shaft moment in FIGURE 2--1, page 8, to arrive at the
calculated shaft moment.
The calculated shaft moment must not exceed the
maximum allowable moment listed in the chart,
FIGURE 2--1, page 8. If the calculated shaft moment
exceeds the maximum allowable moment:
DIncrease Sheave Diameters to Reduce Belt Pull
DUse Jackshaft Drive
DUse Direct Coupled or Gearbox Drive

D--9--611 Page 8
FIGURE 2--1 -- BELT DRIVE OVERHUNG LOAD CALCULATIONS
Dimensions Maximum
Gear (Inches) Allowable
Diameter Moment
Series (Inches) A B C (LB--IN)
45 4.5 7.38 2.75 .75 3591
* 4504 4.5 5.88 2.75 .75 3591
Only
* Applies to 4504 only.
ZAc ZAc ZAc ZAc ZAc ZAc
0.000 1.000 0.250 0.966 0.500 0.926 0.750 0.879 1.000 0.823 1.250 0.751
0.025 0.997 0.275 0.962 0.525 0.922 0.775 0.874 1.025 0.816 1.275 0.742
0.050 0.994 0.300 0.958 0.550 0.917 0.800 0.869 1.050 0.810 1.300 0.734
0.075 0.990 0.325 0.954 0.575 0.913 0.825 0.864 1.075 0.803 1.325 0.725
0.100 0.987 0.350 0.951 0.600 0.908 0.850 0.858 1.100 0.796 1.350 0.716
0.125 0.983 0.375 0.947 0.625 0.904 0.875 0.852 1.125 0.789 1.375 0.706
0.150 0.980 0.400 0.943 0.650 0.899 0.900 0.847 1.150 0.782 1.400 0.697
0.175 0.977 0.425 0.939 0.675 0.894 0.925 0.841 1.175 0.774 1.425 0.687
0.200 0.973 0.450 0.935 0.700 0.889 0.950 0.835 1.200 0.767
0.225 0.969 0.475 0.930 0.725 0.884 0.975 0.829 1.225 0.759
2.5 -- Ac 125954 x HP x S.F.
Ac D x RPM
Key: Ac = Arc of Contact Factor (Refer to Arc of Contact Factors Chart above)
Hp = Blower Horsepower for Operating Conditions
S.F. = Actual Drive Service Factor
D = Blower Sheave Pitch Diameter in Inches
RPM = Blower Sheave Speed
Z = Large Sheave Pitch Diameter (in) -- Small Sheave Pitch Diameter (in)
Sheave Center Distance (in)
[][ ]
Belt Pull =
Shaft Moment (LB--IN) = Belt Pull x B + C +
[()]
Sheave Width
2
CALCULATION OF BELT PULL
CALCULATION OF SHAFT MOMENT
DRIVE SHAFT ILLUSTRATION
MAXIMUM ALLOWABLE MOMENT
ARC OF CONTACT FACTORS

D--9--611 Page 9
Driver Location -- To properly balance the air load
stress on the blower drive shaft, locate the driver on the
inlet side for a vertical mounted blower and on the shaft
side for a horizontal mounted blower.
Belt Drive Alignment -- Belt drives must be carefully
aligned, with the motor and blower sheaves parallel to
each other and in the same plane. Belt tension should
be carefully adjusted according to the belt manufactur-
er’s recommendations using a Tension Tester.
Overtightening belts produces heavy
bearing loads and leads to unwarrant-
able premature failure.
On direct drive blowers, align the couplings so that the
offset and angular misalignment does not exceed .003”
total indicator reading (TIR). Lubricate coupling
according to manufacturer’s specification. With factory
installed drives, proper alignment has been established
before shipment. During shipping, handling and instal-
lation, it is likely that the alignment has been disturbed
and final adjustment must be made before start--up.
PIPING
DuroFlow 45 series, 4504 through 4512 blowers, can
accept a variety of inlet and discharge connectors.
Refer to FIGURE 2--2, below, for a listing of available
connectors. 4504 through 4512 blowers are shipped
without inlet and discharge connectors. Contact your
DuroFlow Distributor to order connectors.
The 4518 Series DuroFlow blower has flat face inlet
and discharge flanges with ANSI 125 lb. bolt patterns.
When installing the blower, avoid subjecting the inlet
and discharge connections to strains caused by
misalignment of the connecting pipes. Never allow the
blower to carry the weight of the pipe.
Piping strain and misalignment stress will distort the
blower during operation, resulting in loss of critical
internal clearances. Loss of internal clearances will
result in serious machine damage and premature,
unwarrantable blower failure.
Whenever possible, install a spool or sleeve--type
expansion joint between the blower and the piping.
Where a flexible connection is not possible, the weight
of the rigid connection and piping must be separately
supported, and thermal pipe growth must be accom-
modated.
Thoroughly clean all system piping
internally before connecting to the
blower.
FIGURE 2--2 -- INLET AND DISCHARGE CONNECTORS
CONNECTOR PART NUMBER
DuroFlow 4” Line Size 4” Line Size 5” Line Size 5” Line Size 6” Line Size 6” Line Size
Model Connector Connector Connector Connector Connector Connector
(Short) (Long) (Short) (Long) (Short) (Long)
4504 N/A DF141575 N/A N/A N/A N/A
4506 DF137356 DF137357 N/A N/A N/A N/A
* 4509 DF138987 N/A DF149559 DF137346 N/A N/A
4512 N/A N/A N/A N/A DF141748 DF137344
ALL CONNECTORS HAVE FEMALE THREADED CONNECTIONS.
* Use 5” connectors above 3000 RPM on pressure service to keep line losses to a minimum.
DUROFLOW INLET AND DISCHARGE CONNECTORS
TWO CONNECTIONS REQUIRED FOR EACH BLOWER
NOTE: CONNECTORS ARE REUSABLE

D--9--611 Page 10
SECTION 3
LUBRICATION
All DuroFlow blowers are splash oil lubricated at both
the gear and drive ends. Oil is distributed around the
gear housing and drive end chamber by the gears and
specially designed oil flingers.
Series Vertical Horizontal
Oil Fill Ports Mounting Mounting
One Port --
45 Shaft & Gear Ends 29 oz. 55 oz.
Interconnected
FIGURE 3--1 -- APPROXIMATE OIL CAPACITIES
RECOMMENDED LUBRICANT
The factory recommended lubricant is AEON PD
Synthetic Lubricant. AEON PD is formulated
especially for positive displacement blowers to provide
maximum protection at any temperature. One filling of
AEON PD will last a minimum of 4 times longer than a
premium mineral oil, depending on actual operating
conditions. AEON PD contains a special additive
package designed for greater rust and corrosion
protection.
AEON PD Lubricant
Description Part Number
1 Quart 28G23
Case/12Quarts 28G24
5 Gallon Pail 28G25
55 Gallon Drum 28G28
AEON PD Food Grade Lubricant
Description Part Number
1 Quart 28H97
Case/12Quarts 28H98
5 Gallon Pail 28H99
55 Gallon Drum 28H100
FIGURE 3--2 -- AEON PD SYNTHETIC LUBRICANT
Machines are shipped without oil in
the sumps. Do not operate before
adding lubricant.
LUBRICATION INSTRUCTIONS
For 45 series models, the oil fill port is located on the
top of the blower at the driveshaft end (see
FIGURE 1-- 2, page 5). The two oil sumps are
connected by a passageway through the housing
Add oil until the level stabilizes at the center of the sight-
glass(es). Oil level at the sight glass must be
established when the blower is not operating.
Add fresh oil as required to maintain proper level.
Do not overfill as this will tend to
cause excessive heating of the gears,
oil to leak through the vent holes, and
may damage the unit.
AEON PD Synthetic Lubricant should be drained after
6000 hours of operation. Re--fill with fresh AEON PD
oil. If mineral oil is used, perform the above oil--change
maintenance every 1500 hours. Recommended
service intervals are for normal blower operating condi-
tions. Severe operating conditions may warrant more
frequent oil changes. Laboratory analysis of lubricant
should be used to help determine the optimum oil
change interval.
For best performance and equipment protection, use
AEON PD Synthetic Lubricant, which has been specifi-
cally formulated for positive displacement blowers. If
you choose not to use AEON PD Synthetic Blower
Lubricant, select an oil with rust and oxidation inhibi-
tors, anti--foam additives, and the viscosities listed in
FIGURE 3--3, page 12. Do not use an oil that
contains EP additives.

D--9--611 Page 11
Flush the oil whenever a change is
made from one type of oil to another.
Flush the oil whenever a change is made from one type
of oil to another. Drain the current lubricant as
thoroughly as possible. Refill with the new lubricant.
Fill to normal level of the blower, which is at the middle
of the sight glass when the machine is not operating.
Run the blower for one hour. Shut off the blower and
drain the lubricant completely. Refill the blower again
with the new lubricant.
Air Seal Vent Systems
All DuroFlow blowers are designed with a vent opening
between the air chamber seal and the oil sump seal that
vents to atmosphere any air which escapes from the air
chamber.
The vent prevents pressurization of the oil sump and
must be left open to atmosphere. Do not plug these
vent holes (see FIGURE 1-- 2, page 5).
Do not plug vent holes or oil sumps
may pressurize causing loss of oil,
excessive heat and serious damage
to the machine.
Oil Sump Breathing System
All DuroFlow blowers are designed to permit their oil
systems to breathe freely to prevent pressurization of
the oil sumps. Breather filters are required to keep
contaminants from entering the oil sumps (see Figure
1--1, page 4).
Breather filters are easily cleaned by washing in
commercial solvent and drying with compressed air.
Clean at every oil change to assure proper venting.

D--9--611 Page 12
Blower Ambient Temperature
Discharge
Temperature Less than10_F* 10_Fto32_F** 32_Fto90_F Greater than 90_F
Less than 32_F ISO 100 }ISO 100 }
(0_C)
32_F to 100_F ISO 100 }ISO 100 }ISO 150 }
(0_Cto38_C)
100_F to 225_F ISO 100 }ISO 100 }ISO 150 }ISO 220 }
(38_C to 105_C)
225_F to 300_F ISO 150 }ISO 150 }ISO 220 }ISO 220 }
(105_C to 149_C)
Greater than 300_F *** }*** }
(149_C)
* For ambient temperatures less than 10_F, but not less than --20_F, the use of oil sump heaters,
heated enclosures or synthetic lubricant is required.
** For ambient temperatures 10_Fto32_F, the use of oil sump heaters, heated enclosures or
synthetic lubricant is recommended.
*** The lubricant viscosity must be 70 SUS minimum at the lubricant operating temperature.
The pour point of the lubricant should be at least 5_to 10_F below the minimum expected ambient
temperature.
For continuous operation, where the lubricant temperature exceeds 200_F, synthetic lubricant
is recommended.
}The recommended operating range for AEON PD Synthetic Lubricant.
FIGURE 3--3 -- VISCOSITY RECOMMENDATION