Gardner Denver LEGEND GAF P Series Service manual

PARTS LIST
OPERATING AND
SERVICE MANUAL
SB--7--622
Version 03
November, 2005
Models
GAF_ _P_
GAG_ _P_
GAH_ _P_
LEGEND
“P” SERIES
BLOWERS
6” -- 8” GEAR DIAMETER

SB--7--622 Page i
MAINTAIN BLOWER RELIABILITY AND PERFORMANCE
WITH GENUINE GARDNER DENVER
PARTS AND SUPPORT SERVICES
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 blower lubri-
cants specifically formulated for optimum perfor-
mance 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.
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 exists
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 ofyour
phone directory, check the Web site at www.gardnerdenver.com or contact:
Gardner Denver
1800 Gardner Expressway
Quincy, IL 62305
Phone: [phone]
Fax: [phone]

SB--7--622 Page ii
FOREWORD
SutorbiltRblowers 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 person-
al 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.

SB--7--622 Page iii
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.

SB--7--622 Page iv
TABLE OF CONTENTS
Page
Maintain Blower Reliability and Performance with Genuine Gardner Denver Parts and Support Services i......
Instructions for Ordering Repair Parts i................................................................
Instructions for Determining Blower Configuration i......................................................
Foreword ii.........................................................................................
Safety Precautions iii...............................................................................
Index v............................................................................................
List of Illustrations v.................................................................................
Sutorbilt Legend Series Sutorbilt Blowers Matrix/Menu vi................................................
Introduction, Your Key To Trouble Free Service 1........................................................
Section 1, Equipment Check 2........................................................................
Section 2, Installation 3..............................................................................
Section 3, Lubrication 6..............................................................................
Section 4, Operation 8...............................................................................
Section 5, Special Tools Required 11..................................................................
Section 6, Disassembly Instructions 15.................................................................
Section 7, Assembly Instructions 18...................................................................
Section 8, Parts List 25..............................................................................
Warranty Last Page.................................................................................

SB--7--622 Page v
INDEX
Air Filters and Filter--Silencers 7.................
ASSEMBLY INSTRUCTIONS, SECTION 7 18.....
Blower Configuration, Determining i...............
Blower Startup Checklist 9......................
Checklist, Blower Startup 9......................
DISASSEMBLY INSTRUCTIONS, SECTION 6 15..
Drive End Lubrication 7.........................
Drive Installation 4.............................
EQUIPMENT CHECK, SECTION 1 2............
Filter--Silencers and Air Filters 7.................
Foreword ii....................................
Foundation 3..................................
Gear End Lubrication 6.........................
Impeller End Clearance, Setting, 22..............
INSTALLATION, SECTION 2 3..................
Installation, Location 3..........................
Installation, Drive 4.............................
Installing Timing Gears 22.......................
Limitations, Operation 8.........................
Location, Installation 3..........................
Lubricant, Recommended 6.....................
LUBRICATION, SECTION 3 6...................
Lubrication
Drive End 7................................
Filling Procedure 6..........................
Gear End 6................................
Lubrication Service 6...........................
Matrix/Menu vi.................................
Mechanical Seals, Assembly 19..................
Mounting Configurations 3.......................
Mounting Feet, Repositioning 3..................
OPERATION, SECTION 4 8.....................
Outline Drawing and Parts List
Model GAF 25, 26..........................
Model GAG 27, 28..........................
Model GAH 29, 30..........................
PARTS LIST, SECTION 5 25....................
Piping 4.......................................
Precautions, Safety 10..........................
Protective Materials, Removing 2................
Recommended Lubricant 6......................
Removing Protective Materials 2.................
Repair Parts, Ordering Instructions i..............
Safety Precautions iii, 10........................
Setting Impeller End Clearance 22................
SPECIAL TOOLS REQUIRED, SECTION 5 11....
Startup Checklist, Blower 9......................
Storage 2.....................................
Timing Gears, Installing 22......................
Trouble Shooting 10............................
YOUR KEY TO TROUBLE FREE SERVICE,
INTRODUCTION 1.........................
LIST OF ILLUSTRATIONS
Figure 1 Blower Mounting Configuration 3.......................................................
Figure 2 Belt Drive Overhung Load Calculations 5................................................
Figure 3 Lubrication 6........................................................................
Figure 4 Approximate Oil Capacities 6..........................................................
Figure 5 Lubrication Recommendation 7........................................................
Figure 6 Temperature Chart 7.................................................................
Figure 7 Maximum Operating Limitations 8......................................................
Figure 8 Puller Plate -- SK2154 11............................................................
Figure 9 Puller Plate -- SK2150 12............................................................
Figure 10 Mechanical Seal Installation Tool -- SK2152 13...........................................
Figure 11 Bearing Press Tool -- Mechanical Seal Units 14.........................................
Figure 24 Torque (Ft--Lbs) 24...................................................................

SB--7--622 Page vi
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
SUTORBILT LEGEND SERIES SUTORBILT BLOWERS
MATRIX/MENU
NOTICE TO CUSTOMER -- To find the construction options for
your blower unit, FILL IN THE BALANCE OF LETTERS 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 MACHINE
IS EQUIPPED.
GA P
__ __ __ __ __ __ __
1234567

SB--7--622 Page 1
INTRODUCTION
YOUR KEY TO TROUBLE FREE SERVICE
Thank you for investing in Sutorbilt quality. The Sutor-
bilt 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 mainte-
nance 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 carefully and you will be rewarded with
trouble--free Sutorbilt service ...yearinandyearout.

SB--7--622 Page 2
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 Sutorbilt 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, addi-
tional measures may be required to prevent rust-
ing 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 operat-
ing level with clean, fresh lubricant.
7. Rotate the blower shaft (10 to 25 turns) monthly
during storage. Inspect the blower shaft (near the
shaft seal area) monthly and spray with rust inhibi-
tor if needed.
8. For long term storage (over six (6) months),
contact Sutorbilt Customer Service for recom-
mendations.
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. Care should be
exercised to lock out the blower to prevent start--up
Rotating components will cause
severe injury in case of personal
contact. Keep hands away from blow-
er inlet and discharge ports.

SB--7--622 Page 3
SECTION 2
INSTALLATION
LOCATION
If possible, install the blower in a well lit, clean, dry place
with plenty of room for inspection and maintenance.
FOUNDATIONS
For permanent installations 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
strains, 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 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.
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 1). If converting a blower from vertical to
horizontal, or horizontal to vertical mounting configura-
tion, 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.
If the unit is not flat within .002 of an
inch, it will be necessary to shim the
blower feet at installation.
FIGURE 1 -- BLOWER MOUNTING CONFIGURATIONS

SB--7--622 Page 4
4. Secure the mounting feet capscrews to the torque
value in FIGURE 24, page 24.
When changing mounting configura-
tion, it may be necessary to reposition
ventplug(B),anddrainplug(A). Re-
fer to FIGURE 3, page 6, 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, page 5, 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.
Overtightening belts leads to heavy
bearing loads and premature failure.
On the direct connected units, alignment and lubrica-
tion 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, page 5.
The calculated shaft moment must not exceed the
maximum allowable moment listed in Maximum Allow-
able Moment Chart, FIGURE 2, page 5. If the calcu-
lated shaft moment exceeds the maximum allowable
moment:
DIncrease Sheave Diameters to Reduce Belt Pull
DUse Jackshaft Drive
DUse 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, page 5, to calculate belt pull. Refer
to Arc of Contact Factor Chart, FIGURE 2, page
5.
2. Insert the calculated belt pull into the formula for
Calculation of Shaft Moment, FIGURE 2, page
5, 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 and thermal expansion 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 5
FIGURE 2 -- BELT DRIVE OVERHUNG LOAD CALCULATIONS
Dimensions Maximum
Gear (Inches) Allowable
Diameter Moment
(Inches) A B C (LB--IN)
(Max)
6 4.08 1.14 .38 1788
7 4.50 1.31 .38 3000
8 5.57 1.77 .38 4144
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
[]

SB--7--622 Page 6
SECTION 3
LUBRICATION
FIGURE 3 -- LUBRICATION
A. OIL DRAIN PLUG
B. BREATHER / OIL FILL
C. GREASE FITTING
E. GREASE VENTS
H. OIL LEVEL GAUGE
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. 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 fittings 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.
RECOMMENDED LUBRICANT
Gear
Diameter Vertical Horizontal
6” 1--1/4 PT. 3 PT.
7” 1--2/3 PT. 3--1/2 PT.
8” 2--1/2 PT. 7 PT.
Quantities are for purchase estimates only.
FIGURE 4 -- APPROXIMATE OIL CAPACITIES
GEAR END LUBRICATION
AEON PD is formulated especially for positive
displacement blower service to provide maximum
blower protection at any temperature. One filling of
AEON PD will last a minimum of 4 times longer than a
premium mineral oil. Refer to FIGURE 5, page 7.
AEON PD 1 Quart Bottle Part No. 28G23
AEON PD 12 Quart Case Part No. 28G24

SB--7--622 Page 7
Blower Factory Tested
Discharge Recommended and
Temperature Approved Lubricant
_F_C AEON PD
32_0_Synthetic Blower Lubricant
100_38_One Superior Lubricant
275_135_For
350_177_All Operating Temperatures
FIGURE 5 -- TEMPERATURE CHART
DRIVE END LUBRICATION
Grease drive end bearings every 500 hours of opera-
tion with a non--corrosive, extreme pressure bearing
grease of the following specification:
Blower Grease
Discharge Temperature Specification
Up to 350_F (177_C) NLGI Grade 2 EP
If not using AEON PD synthetic blower lubricant, use
oils with rust and oxidation inhibitors, anti-foam addi-
tives and the viscosities listed in FIGURE 6.
AIR FILTERS AND FILTER SILENCERS
Servicing the air filters is one of the
most important maintenance opera-
tions to be performed 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.
No matter what type of filter is used,
always make sure all seats, gaskets,
clamps and hose connections on the
filter and inlet line are absolutely air
tight. Each time the filter is serviced,
inspect interior of the blower for dirt.
FIGURE 6 -- LUBRICATION RECOMMENDATION
Blower Oil Oil Viscosity
Discharge Grade SUS
Temperature ISO @ 100_F
32_F to 100_F 100 465
(0_Cto38_C)
100_F to 225_F 150 700
(38_C to 105_C)
225_F to 300_F 220 1000
(105_C to 149_C)
Over 300_F**
(149_C)
* The oil viscosity must be 70 SUS minimum at discharge temperature minus 50_F.

SB--7--622 Page 8
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 no 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 the follow-
ing tabulation.
Operating beyond the specified oper-
ating 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 er-
ror that may be caused by intervening pipe runs, fit-
tings, etc.
Relief valves should be used to protect against exces-
sive pressure or vacuum conditions. These valves
should be tested at initial startup to be sure they are ad-
justed to relieve at or below the maximum pressure dif-
ferential rating of the blower.
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 tem-
peratures. Check valves in the discharge line on pres-
sure 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 7, below.
MAXIMUM OPERATING LIMITATIONS
PRESSURE VACUUM DISCHARGE
SIZE RPM PSI IN HG 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
FIGURE 7 -- MAXIMUM OPERATING LIMITATIONS
Blower speed, line losses, elevation, and increased inlet temperatures
will affect the maximum operating limitations.

SB--7--622 Page 9
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 a new location. It is suggested that the steps be followed in sequence
and checked off ( ) in the boxes provided.
V1. Check the unit and all piping for foreign material and clean if required.
V2. Check the flatness of the feet and the alignment of the drive. Feet that are bolted down in a bind
can cause case distortion and internal rubbing. Misaligned V-drives can cause the impellers to rub
against the headplates and cause a reduction in the volumetric efficiency of the unit. Misaligned
couplings can ruin bearings.
V3. If blower is V--belt driven, check the belt tension and alignment. Over-tensioned belts create heavy
bearing loads which leads to premature failure.
V4. Be sure adequate drive guards are in place to protect the operator from severe personal injury from
incidental contact.
V5. Check the unit for proper lubrication. Proper oil level cannot be overemphasized. Too little oil will
ruin bearings and gears. Too much oil will cause overheating and can ruin gears and cause other
damage. Insure drive end bearings are greased.
V6. With motor locked out, turn the drive shaft by hand to be certain the impellers do not bind.
V7. “Jog” the unit with the motor a few times to check rotation and to be certain it turns freely and
smoothly.
V8. 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
start--up.
V9. Start the unit and operate 15 minutes at no load. During this time, check for hot spots and other
indications of interference.
V10. Apply the load and observe the operation of the unit for one hour. Check frequently during the first
day of operation.
V11. If malfunctions occur, do not continue to operate. Problems such as knocking impellers can cause
serious damage if the unit is operated without correction.

SB--7--622 Page 10
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
manufacturers’ rim speed limit.
6. The blower and blower discharge piping may be
extremely hot and can 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 adjust-
ment, or various external causes. Whenever equip-
ment 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
1. Unit out of time. 1. Retime impellers.
2. Distortion due to improper 2. Check mounting alignment and
mounting or pipe strains. relieve pipe strains.
Knocking 3. Excessive pressure differential. 3. Reduce to manufacturer’s
recommended pressure. Examine
relief valve, re-set if necessary.
4. Worn gears. 4. Replace timing gears.
5. Worn bearings. 5. Replace bearings.
1. Too much oil in gear case. 1. Reduce oil level.
Excessive blower 2. Too low operating speed. 2. Increase blower speed.
temperature. 3. Clogged filter or muffler. 3. Remove cause of obstruction.
4. Excessive pressure differential. 4. Reduce pressure differential
across the blower.
5. Worn impeller clearances. 5. Replace impeller.
6. Internal contact. 6. Correct clearances.
1. Insufficient assembled 1. Correct clearances.
clearances.
Impeller end 2. Case or frame distortion. 2. Check mounting and pipe strain.
or tip drag. 3. Excessive operating pressure. 3. Remove cause.
4. Excessive operating temperature. 4. Remove cause.
Lack of volume. 1. Slipping belts. 1 Tighten belts.
2. Worn clearances. 2. Re-establish proper clearances.
Excessive bearing 1. Improper lubrication. 1. Correct lubrication level. Replace
or gear wear. dirty oil.
1. Headplate, gear case or 1. Clean vents.
Loss of oil. drive cover vents plugged.
2. Worn seal. 2. Replace seals.

SB--7--622 Page 11
SECTION 5
SPECIAL TOOLS REQUIRED
6” 7” 8”
A 11.00 13.00 16.00
B 6.000 7.000 8.000
C 2.500 3.000 4.000
D 3.000 3.500 4.000
E 1.503 1.679 2.210
F 11.00 13.00 15.00
H 0.437 0.500 0.500
J 1.500 1.688 1.875
K 5.500 6.500 7.500
NOTE:
1. REMOVE SHARP EDGES
2. MAT’L: MED. CARBON STEEL
FIGURE 8 -- PULLER PLATE -- SK2154

SB--7--622 Page 12
1 PIPE -- STEEL 2” SCH 80
2 MED. CARBON STEEL 1/2”
FIGURE 9 -- GEAR DRIVER -- SK2150

SB--7--622 Page 13
UNIT
SIZEAB CDEFH
6” 2.748 3.150 0.515 1.890 2.450 0.125 1.400
7” 3.000 3.543 0.424 1.863 2.423 0.150 1.616
8” 3.250 3.938 0.407 2.000 2.800 0.150 1.813
FIGURE 10 -- MECHANICAL SEAL INSTALLATION TOOL -- SK2152
NOTES:
1. BREAK SHARP EDGES
2. MATERIAL: 4140
3. HEAT TREAT TO RC 48 -- 52