Gardner Denver LEGEND P Series Service manual

PARTS LIST
OPERATING AND
SERVICE MANUAL
LEGEND
“P”SERIES
BLOWERS
6”–8”GEAR
DIAMETER
Models
GAF_ _ P _
GAG_ _ P _
GAH_ _ P _
SB
-
7
-
622
Version 04
July 9, 2015

SB-7-622 Page 1
MAINTAIN BLOWER RELIABILITY AND PERFORMANCE
WITH GENUINE GARDNER DENVER
PARTS AND SUPPORT SERVICES
Factory genuine parts, manufactured to design tolerances, are developed for optimum dependability - - -
specifically for your blower. Design and material innovations 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.
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 AEON™PD blower lubricants specifically formulated for optimum
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
service.
INSTRUCTIONS FOR DETERMINING BLOWER CONFIGURATION
1. Face the blower drive shaft.
2. In a VERTICAL configuration, air flow is horizontal.
3. In a HORIZONTAL configuration, air flow is vertical.
4. In a vertical configuration, a BOTTOM HAND exists when the drive shaft is below the horizontal
center line of the blower. A TOP HAND exits when the drive shaft is above the horizontal center line
of the blower.
5. In a horizontal configuration, a RIGHT HAND exists when the drive shaft is to the right of the vertical
center line of the blower. A LEFT HAND exists when the drive shaft is to the left of the vertical center
line of the blower.
INSTRUCTIONS FOR ORDERING REPAIR PARTS
For pricing, and ordering information contact your nearest AUTHORIZED FACTORY DISTRIBUTOR. When
ordering parts, specify Blower MODEL and SERIAL NUMBER (see nameplate on unit).
Rely upon the knowledge and experience of your AUTHORIZED DISTRIBUTOR and let them assist you in
making the proper parts selection for your blower.
For the location of your local authorized Gardner Denver 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]

SB-7-622 Page 2
GARDNER DENVER LUBRICANT ORDER INFORMATION
Re--order Part Numbers for Factory--Recommended Lubricants.
Gear End
AEON PD Synthetic Lubricant or AEON PD--Food Grade Synthetic Lubricant
AEON PD Synthetic Lubricant
Description Part Number
1 Quart 28G23
Case/12Quarts 28G24
1 Gallon Container 28G40
5 Gallon Pail 28G25
55 Gallon Drum 28G28
AEON PD--Food Grade Synthetic Lubricant
Description Part Number
1 Quart 28H97
Case/12Quarts 28H98
1 Gallon Container 28H333
5 Gallon Pail 28H99
55 Gallon Drum 28H100
Drive End
AEON PD Grease
Description Part Number
Case/10 Tubes 28H283
Call your local Sutorbilt Distributor to place your order for Gardner Denver lubricants. Your
Authorized Gardner Denver Distributor is:

SB-7-622 Page 3
FOREWORD
Sutorbiltâblowers 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,
maintenance 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
Notice is used to notify people of installation, operation or maintenance information which is
important but not hazard-related.

SB-7-622 Page 4
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.
·Keep fingers and clothing away from revolving fan, drive coupling, etc.
·Do not use the air discharge from this unit for breathing –not suitable for human
consumption.
·Do 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.
·Electrical shock can and may be fatal.
·Blower 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.
·Open main disconnect switch, tag and lockout before working on the control.
·Disconnect the blower from its power source, tag and lockout before working on the
unit –this machine may be automatically controlled and may start at any time.
Failure to observe these notices could result in damage to equipment.
·Stop the unit if any repairs or adjustments on or around the blower are required.
·Disconnect the blower from its power source, tag and lockout before working on the
unit –this machine maybe automatically controlled and may start at any time.
·Do not exceed the rated maximum speed shown on the nameplate.
·Do not operate unit if safety devices are not operating properly. Check periodically.
Never bypass safety devices.
I

SB-7-622 Page 5
TABLE OF CONTENTS
Maintain Blower Reliability And Performance.......................................................................................................1
Foreword.............................................................................................................................................................3
Safety Precautions...............................................................................................................................................4
Sutorbilt Legend Series Blowers Matrix/Menu......................................................................................................8
Introduction..........................................................................................................................................................9
Section 1, Equipment Check..............................................................................................................................10
Section 2, Installation......................................................................................................................................... 11
Section 3, Lubrication ........................................................................................................................................ 14
Section 4, Operation.......................................................................................................................................... 16
Section 5, Special Tools Required ..................................................................................................................... 19
Section 6, Disassembly Instructions................................................................................................................... 23
Section 7, Assembly Instructions........................................................................................................................ 26
Section 8, Parts List........................................................................................................................................... 33

SB-7-622 Page 6
INDEX
Air Filters And Filter Silencers...............................14
Assembly Instructions, Section 7...........................26
Blower Startup Checklist.......................................17
Disassembly Instructions, Section 6......................23
Disassembly Instructions ......................................23
Drive Installation...................................................12
Equipment Check, Section 1
Equipment Check .................................................10
Equipment Check, Section 1.................................10
Filling Procedure...................................................14
Foundations..........................................................11
Gear End Lubrication............................................15
Installation, Section 2
Installaion.............................................................11
Installation, Section 2............................................11
Introduction............................................................ 9
Limitations............................................................16
Location................................................................11
Lubricataion, Section 3 .........................................14
Lubrication Service...............................................14
Lubrication, Section 3
Lubrication........................................................... 14
Mechanical Seals Only................................... 26, 27
Mounting Configurations ...................................... 11
Operation, Section 4
Operation............................................................. 16
Operation, Section 4 ............................................ 16
Parts List, Section 8............................................. 33
Piping .................................................................. 12
Removing Protective Materials............................. 10
Repositioning The Mounting Feet......................... 11
Safety Precautions................................................. 4
Safety Precautions............................................... 18
Section 7
Assembly Instructions.......................................... 26
Special Tools Required Section 5......................... 19
Special Tools Required, Section 5
Special Tools Required........................................ 19
Storage................................................................ 10
Trouble Shooting.................................................. 18
LIST OF ILLUSTRATIONS
Figure 2- 1 –Blower Mounting Configurations.................................................................................................... 11
Figure 2- 2 –Belt Drive Overhung Load Calculations......................................................................................... 13
Figure 4- 1 –Maximum Operating Limitations .................................................................................................... 16
Figure 5- 1 –Puller Plate –SK2154................................................................................................................... 19
Figure 5- 2 –Gear Driven –SK2150.................................................................................................................. 20
Figure 5- 3 –Mechanical Seal Installation Tool –SK2152.................................................................................. 21
Figure 5- 4......................................................................................................................................................... 22
Figure 6- 1......................................................................................................................................................... 23
Figure 6- 2......................................................................................................................................................... 23
Figure 6- 3......................................................................................................................................................... 24
Figure 6- 4......................................................................................................................................................... 24
Figure 6- 5......................................................................................................................................................... 24
Figure 6- 6......................................................................................................................................................... 25
Figure 7- 1......................................................................................................................................................... 26
Figure 7- 2......................................................................................................................................................... 27
Figure 7- 3......................................................................................................................................................... 27
Figure 7- 4......................................................................................................................................................... 28
Figure 7- 5......................................................................................................................................................... 29
Figure 7- 6......................................................................................................................................................... 30
Figure 7- 7 –Torque (Ft-Lbs.)............................................................................................................................ 32

SB-7-622 Page 7
SUTORBILT LEGEND SERIES BLOWERS
MATRIX/MENU
NOTICE TO CUSTOMER –To find the construction options for
Your blower unit, FILL IN THE BALANCE OF LETTERS OR G A P
NUMBERS FROM YOUR UNIT NAMEPLATE __ __ __ __ __ __ __
COLUMN NUMBER: 1 2 3 4 5 6 7
FOLLOW THE LINE DOWN AND OVER FROM EACH SPACE
THUS FILLED IN TO FIND THE APPROPRICATE
CONSTRUCTION OPTION WITH WHICH YOUR MACHINE IS
EQUIPPED.
COLUMN 1 –BASIC DESIGNATOR
COLUMN 2 –PRODUCT FAMILY
COLUMN 3
–
GEAR DIAMETER
F 6”
G 7”
H 8”
COLUMN 4 –CASE LENGTH
L - Low Pressure
M - Medium Pressure
H - High Pressure
COLUMN 5
–
CONFIGURATION
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. Lip Seal
B. Mechanical Seal

SB-7-622 Page 8
INTRODUCTION
YOUR KEY TO TROUBLE FREE SERVICE
Thank you for investing in Sutorbilt quality. The Sutorbuilt reputation for rugged dependability has been earned
by over 50 years of service in demanding, industrial operations where downtime cannot be tolerated and efficient
blower performance is expected.
Your Sutorbilt 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 maintenance
procedures that you must observe to assure optimum blower performance. There is no guesswork in the
manufacture of your highly advanced Sutorbilt 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 Sutorbilt blower. It is
essential that you review all sections of this manual in preparation for installing your blower. Follow the
instructions for installing your blower. Follow the instructions carefully and you will be rewarded with trouble-free
Sutorbilt service year in and year out.

SB-7-622 Page 9
SECTION 1
EQUIPMENT CHECK
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.
Customers are cautioned to provide
adequate protection, warning and safety
equipment necessary to protect personnel
against hazards involved in installation and
operation of this equipment in the system or
facility.
STORAGE
Your Gardner Denver Blower was packaged at the
factory with adequate protection to permit normal
storage for up to six (6) months.
If the unit is to be stored under adverse conditions or
for extended periods of time, the following additional
measures should be taken to prevent damage.
1. Store the blower in a clean, dry, heated (if
possible) area.
2. Make certain inlet and discharge air ports are
tightly covered to prevent foreign material from
entering the air box.
3. All exposed, non-painted surfaces should be
protected against rust and corrosion.
4. Provide adequate protection to avoid
accidental mechanical damage.
5. In high humidity or corrosive environments,
additional measures may be required to prevent
rusting of the blower internal surfaces.
6. To prevent rusting of gears, bearings, etc., the oil
reservoirs may be filled with normal operating oil.
Before running the blower, drain the oil and
replace to the proper operating level with clean,
fresh lubricant.
7. Rotate the blower shaft (10 to 25 turns) weekly
during storage. Inspect the blower shaft (near the
shaft seal area) monthly and spray with rust inhibitor
if needed.
8. For long term storage (over six (6) months),
contact Gardner Denver Compressor Division
Customer Service for recommendations.
REMOVING PROTECTIVE MATERIALS
The shaft extension is protected with rust inhibitor
which can be removed with any standard solvent.
Follow the safety directions of the solvent
manufacturer.
Blower inlet and outlet are temporarily capped to
keep out dirt and other contaminants during
shipment. These covers must be removed before
start-up.
The internal surfaces of all Sutorbilt units are mist
sprayed with a rust preventative to protect the
machine during shipment. Remove this film upon
initial startup, using any commercial safety solvent.
Position the blower so that the inlet and discharge
connections are in the vertical position (vertical
airflow). On vertically mounted units, it will be
necessary to lay the unit on its side supporting the
ends of the unit so as not to restrict the port on the
bottom side. Place a shallow pan on the under side
of the unit. With the blower disconnected from
power, spray the solvent in the top port, rotating the
impellers by spinning the shaft manually. Continue
this procedure until the unit is visibly clean.
Rotating components will cause severe
injury in case of personal contact. Keep
hands and loose clothing away from blower
inlet and discharge ports..

SB-7-622 Page 10
SECTION 2
INSTALLATION
LOCATION
Install the blower in a well lit, clean dry place with
plenty of room for inspection and maintenance.
FOUNDATIONS
For permanent installation we recommend concrete
foundations be provided, and the equipment should
be grouted to the concrete. It is necessary that a
suitable base be used, such as a steel combination
base under blower and motor, or a separate sole
plate under each. Before grouting, equipment must
be leveled, free of all stains, and anchored so no
movement will occur during setting of grout. After
grout has completely hardened, a recheck is
necessary to compensate for shrinkage, etc. 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
grouting, they must be backed off and wedges
removed before final tightening of anchor bolts.
Refer to grouting instructions.
Where a concrete foundation is not feasible, care
must be taken to insure that equipment is firmly
anchored to adequate structural members,
restricting movement and vibration.
MOUNTING CONFIGURATIONS
The blower flex-mount design enables horizontal
and vertical mounting configurations with top or
bottom hand, right or left hand shaft positioning.
The units are center timed allowing rotation in either
direction (refer to Figure 2-1). If converting a blower
from vertical to horizontal, or horizontal to vertical
mounting configuration, additional mounting feet will
be required.
REPOSITIONING THE MOUNTING FEET.
1. Position the mounting feet to the desired
location and snug the capscrew.
2. Place the blower on its feet on a flat surface.
3. Loosen mounting feet capscrews and level unit
up. The bench or blower base flatness should be
within .002 of an inch.
NOTICE
If the unit is not flat within .002 of an inch, it
will be necessary to shim the blower feet at
installation.
FIGURE 2- 1 –BLOWER MOUNTING CONFIGURATIONS

SB-7-622 Page 11
4. Secure the mounting feet capscrews to the torque
value in Figure 7-8, page 34.
NOTICE
Over tightening belts leads to heavy bearing
loads and premature failure.
NOTICE When changing mounting configuration, it
may be necessary to reposition vent plug (B), and
drain plug (A). Refer to Figure 3-1, page 17, for
correct location.
DRIVE INSTALLATION
When selecting a V-belt drive, check to be sure the
shaft overhung load limitation is not exceeded. Refer to
FIGURE 2- 2, page 13, for overhung load calculations
and limitations.
Belt drives must be carefully aligned. Motor and blower
pulleys must be parallel to each other and in the same
plane within 1/32 inch. Belt tension should be carefully
adjusted to the belt manufacturer’s recommendation
using a belt tension gauge. Check tension frequently
during the first day of operation.
Over tightening belts leads to heavy bearing
loads and premature failure.
On the direct connected units, alignment and lubrication
of couplings to specifications of the coupling
manufacturer is very important. When mounted drives
are supplied from the factory proper alignment has
been established before shipment. However, during
shipping, handling and installation, it is likely that the
alignment has been disturbed and final adjustment
must be made before startup.
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”in Drive Shaft
Illustration, FIGURE 2- 2, page 13
The calculated shaft moment must not exceed the
maximum allowable moment listed in Maximum
Allowable Moment Chart, FIGURE 2- 2 page 13. If the
calculated shaft moment exceed the maximum
allowable moment:
·Increase Sheave Diameters to Reduce Belt Pull
·Use Jackshaft Drive
·Use Direct Coupled or Gearbox Drive
To calculate shaft moment for a given V-Belt Drive
Arrangement:
1. Use the formula for Calculation of Belt Pull,
FIGURE 2- 2, page 13, to calculate belt pull. Refer
to Arc of Contact Factor Chart, Figure 2-2, page 15.
2. Insert the calculated belt pull into the formula for
Calculation of Shaft Moment, FIGURE 2- 2,
page 13 to arrive at the calculated shaft moment.
PIPING
Inlet and discharge connections on all blowers are large
enough to handle maximum volume with minimum
friction loss. Reducing the pipe diameter on either inlet
or discharge will only create additional line loss and
increase the overall pressure differential.
Excessive weight of piping and fittings will cause
internal misalignment and premature wear. Never allow
the blower to carry the weight of the pipe. If possible, a
spool or sleeve-type expansion joint should be installed
between the unit and the piping. Where a flexible
connection is not practical, the weight of the rigid
connection must be separately supported.
All system piping must be cleaned internally before
connecting to the blower.
Sutorbilt
blowers are shipped dry from the
factory. Do not attempt to operate the
blower before following proper lubrication
instructions. Permanent damage to the
gears, bearings and seals will occur.

SB-7-622 Page 12
Gear
Diameter
(Inches)
Dimensions
(Inches)
Maximum
Allowable
Moment
(LB-IN)
A B C
(Max)
6 4.08 1.14 .38 1788
7 4.50 1.31 .38 3000
8 5.57 1.77 .38 4144
MAXIMUM ALLOWABLE MOMENT
DRIVE SHAFT ILLUSTRATION
Z Ac Z Ac Z Ac Z Ac Z Ac Z Ac
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
ARC OF CONTACT FACTORS
Belt Pull = 2.5 –Ac X 125954 x Hp x S.F.
Ac
D x RPM
Key: Ac =
Arc of Contact Factor (Refer to Arc of Contact Factor 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)
CALCULATION OF BELT PULL
Shaft Moment (LB-IN) = Belt Pull x B + C+ Sheave Width
2
CALCULATION OF SHAFT MOMENT
FIGURE 2- 2 –BELT DRIVE OVERHUNG LOAD CALCULATIONS

SB-7-622 Page 13
SECTION 3
LUBRICATION
FIGURE3- 1 - LUBRICATION
At the gear end the timing gear teeth are lubricated by being partially submerged in oil. The gear teeth serve as
oil slingers for gear end bearings. At the drive end the bearings are grease lubricated.
FILLING PROCEDURE
Refer to Figure 3-1. Remove the breather (B) from the gear cover. Add oil to the gear case until it reaches the
center line of the oil level gauge (H). Secure breather (B) in its correct location.
LUBRICATION SERVICE
Add fresh oil as required to maintain proper level. The oil should be drained, flushed and replaced every 1500
hours or more frequently if inspection so indicates. The oil drain plug is located at (A).
Do not overfill as this will tend to cause excessive heating of the gears and may damage the unit.
Bearings on the drive end of the blower require grease lubrication every 500 hours of operation. Lubricate the
bearings through grease fitting located at (C). When regreasing, the old grease will be forced out of the vents (E).
To prevent damage to seals, these vents must be open at all times.
AIR FILTERS AND FILTER SILENCERS
Servicing the air filters is one of the most important maintenance operations to be preformed to
insure long blower life.
Servicing frequency of filter elements is not time predictable. A differential pressure indicator, with a continuous
gauge reading, should be installed across the inlet filter. It will tell how much of the service life of the filter
element has been used. It will also eliminate both premature filter servicing and premature blower failure due to a
plugged filter when the filter pressure drop is used to establish maintenance points. In all cases refer to the filter
manufacturer’s service instructions. Due to the many types of filters, it is not practical to give specific instructions
covering all models.
NOTICE
Do not overfill as this will tend to cause excessive heating of the gears and may damage the unit.

SB-7-622 Page 14
GEAR END LUBRICATION
AEON PD Synthetic Blower Lubricant is recommended. Refer to FIGURE 3-3, for AEON PD, AEON PD-FG
(Food Grade) and AEON PD-XD (Extreme Duty) part numbers. Order AEON PD from your Gardner Denver
Distributor or call Gardner Denver directly.
Convenient
Package Sizes AEON PD Part No. AEON PD-FG Part No. AEON PD-XD Part No.
1 quart 28G23 28H97 28G46
Case
12 quarts 28G24 28H98 28G47
1 gallon 28G40 28H333 28G42
Case
6 gallons 28G41 28H334 28G43
5 gallon pail 28G25 28H99 28G44
55 gallon drum 28G28 28H100 28G45
FIGURE3- 2 –AEON PD SYNTHETIC LUBRICANT
AEON PD is formulated especially for positive displacement blower service to provide maximum blower protection
at any temperature. One fill of AEON PD will last a minimum of 4 times longer than a premium mineral oil. Refer
to FIGURE 3-4.
Ambient Temperatures
Less than 10° F 10°F to 32°F 32°F to 90°F
Greater than
90°F
Blower
Discharge
Temperature
Less than 32°F AEON PD
AEON PD-FG
AEON PD
AEON PD-FG
32° F to 100° F AEON PD
AEON PD-FG
AEON PD
AEON PD-FG
AEON PD
AEON PD-FG
100° F to 225°F AEON PD
AEON PD-FG
AEON PD
AEON PD-FG
AEON PD
AEON PD-FG
AEON PD
AEON PD-FG
225° F to 300° F AEON PD
AEON PD-FG
AEON PD
AEON PD-FG
AEON PD
AEON PD-FG AEON PD XD
Greater than 300°F AEON PD XD AEON PD XD
FIGURE3- 3 –SYNTHETIC LUBRICANT CHART

SB-7-622 Page 15
SECTION 4
OPERATION
Future operating problems can be avoided if proper precautions are observed when the equipment is first put into
service.
Before starting under power, the blower should be turned over by hand to make certain there is not binding or
internal contact.
Each size blower has limits on pressure differential, running speed and discharge temperature which must not be
exceeded. These limits are shown in “Maximum Operating Limitations”, FIGURE 4- 1, below.
Operating beyond the specified operating limitations will result in damage to the unit.
It is important that the pressures and temperatures are measured directly at the ports of the blower to avoid error
that may be caused by intervening pipe runs, fittings, etc.
Relief valves must be used to protect against excessive pressure or vacuum conditions. These valves should be
tested at initial startup to be sure they are adjusted to relieve at or below the maximum pressure differential rating
of the blower.
NOTICE
Relief valves should be placed as close as possible to the blower inlet or discharge.
In some instances, pressure may be relieved at a lower point than the blower maximum in order to protect the
motor or the equipment served by the blower.
Discharge temperature switches are recommended to protect against excessive inlet restriction or inlet
temperatures. Check valves in the discharge line on pressure blowers and in the inlet line on vacuum blowers are
recommended to protect the blower from motoring backwards when shut down under load.
LIMITATIONS
For information regarding limitations, refer to FIGURE 4- 1, below.
MAXIMUM OPERATING LIMITATIONS
SIZE RPM PRESSURE
PSI VAC IN HG DISCHARGE TEMPERATURE ° F
6LP 2350 7 14 260
6MP 2350 14 16 325
6HP 2350 15 16 340
7LP 2050 6 12 260
7MP 2050 10 16 325
7HP 2050 15 16 340
8LP 1800 6 12 260
8MP 1800 10 16 325
8HP 1800 15 16 340
DO NOT EXCEED THESE LIMITS
NOTICE
Blower speed, line losses, elevation, and increased inlet temperatures will
affect the
maximum operating limitations.
FIGURE 4- 1 –MAXIMUM OPERATING LIMITATIONS

SB-7-622 Page 16
BLOWER STARTUP CHECKLIST
This startup procedure should be followed during the initial installation and after any shutdown periods or after the
blower has been worked on or moved to new location. It is suggested that the steps be followed in sequence and
checked off (√) in the boxes provided.
1. Check the unit and all piping for foreign material and clean if required.
2. Check the flatness of the feet and the alignment of the drive. Feet that are bolted down in a bind
can cause housing distortion and internal rubbing. Misaligned V-drives can cause the rotors to
rub against the headplates and cause a reduction in the volumetric efficiency of the unit.
Misaligned couplings can ruin bearings.
3. If the blower is V-belt driven, check the belt tension and alignment. Over-tensioned belts create
heavy bearing/shaft loads which lead to premature failure.
4. Be sure adequate drive guards are in place to protect the operator from severe personal injury
and incidental contact.
5. Check the unit for proper lubrication. Proper oil level cannot be over-emphasized. Too little oil
will ruin bearings and gears. Too much oil will cause overheating and can ruin gears and cause
other damage. Insure that grease lubricated bearings are properly lubricated.
6. With motor electrical power locked out and disconnected, turn the drive shaft by hand to be
certain the impellers do not bind.
7. “Jog”the unit with the motor a few times to check that rotation is in the proper direction, and to be
certain it turns freely and smoothly.
8. The internal surfaces of all Sutorbilt units are mist sprayed with a rust preventive to protect the
machine during the shipping and installation period. This film should be removed upon initial
startup.
9. Start the unit and operate 15 minutes at no load. During this time, check for hot spots and other
indications of interference.
10. Apply the load and observe the operation of the unit for one hour. Check frequently during the
first day of operation.
11. If malfunctions occur, do not continue to operate. Problems such as knocking rotors can cause
serious damage if the unit is operated without correction.

SB-7-622 Page 17
SAFETY PRECAUTIONS
1. Do not operate blower with open inlet or outlet port.
2. Do not exceed specified vacuum or pressure limitations.
3. Do not operate above or below recommended blower speed range.
4. Blower is not to be used where non-sparking equipment is specified.
5. Do not operate without belt guard or coupling shield.
Do not exceed sheave or coupling manufacturer’s rim speed limit.
6. The blower and blower discharge piping may be extremely hot and cause skin burns on contact.
7. Prolonged exposure may require ear protection.
TROUBLE SHOOTING
No matter how well the equipment is designed and manufactured, there may be times when servicing will be
required due to normal wear, the need for adjustment, or various external causes. Whenever equipment needs
attention, the operator or repairman should be able to locate the cause and correct the trouble quickly. The
Trouble Shooting Chart below is provided to assist the mechanic in those respects.
PROBLEM POSSIBLE CAUSES SOLUTION
Knocking
1. Unit out of time.
2. Distortion due to improper mounting
or pipe strains.
3. Excessive pressure differential.
4. Worn gears.
5. Worn bearings.
1. Re-time impellers
2. Check mounting alignment and relieve pipe
strains.
3. Reduce to manufacturer’s recommended
pressure. Examine relief valve, re-set if
necessary.
4. Replace timing gears.
5. Replace bearings..
Excessive blower temperature.
1. Too much oil in gear case.
2. Too low operating speed.
3. Dirty air Filter.
4. Clogged filter or muffler.
5. Excessive pressure differential.
6. Worn impeller clearances.
7. Internal contact.
1. Reduce oil level.
2. Increase blower speed.
3. Clean or replace air filter
4. Remove cause of obstruction.
5. Reduce pressure differential
across the blower.
6. Replace impeller.
7. Correct clearances.
Impeller end or tip drag.
1. Insufficient assembled clearances.
2. Case or frame distortion.
3. Excessive operating pressure.
4. Excessive operating
1. Correct clearances.
2. Check mounting and pipe strain.
3. Remove cause.
4. Remove cause
Lack of volume. 1. Slipping belts.
2. Worn clearances.
3. Dirty air filter
1. Tighten belts.
2. Re-establish proper clearances.
3. Clean or replace air filter.
Excessive bearing or gear wear. 1. Improper lubrication. 1. Correct lubrication level. Replace dirty oil.
Loss of oil. 1. Headplate, gear case or drive cover vents plugged.
2. Worn Seal.
1. Clean vents.
2. Replace seals.

SB-7-622 Page 18
SECTION 5
MAINTENANCE
FIGURE 5- 1 –PULLER PLATE –SK2154

SB-7-622 Page 19
FIGURE 5- 2 –GEAR DRIVEN –SK2150