Tuthill TI850 Operating instructions

TUTHILL
TI850
Rotary Positive Displacement Air Blowers
WARNING
DO NOT OPERATE BEFORE
READING MANUAL.
05/2006
LEADING THE SEARCH FOR INNOVATIVE SOLUTIONS
4840 West Kearney Street
Springfield, Missouri USA 65803-8702
Tel [phone] 825-6937 Fax [phone]
E-mail: [e-mail]
http://vacuum.tuthill.com
INSTALLATION
OPERATION
MAINTENANCE
REPAIR
MANUAL
SERIES: 17 –Lip/Labyrinth Seals / Air Service –Horizontal Flow
46 –Lip/Labyrinth Seals / Air Service –Vertical Flow
87 –Slinger/Piston Ring Seals / Air Service –Horizontal Flow
88 –Slinger/Piston Ring Seals / Air Service –Vertical Flow

!WARNING
SAFETY INSTRUCTIONS
1. Do not operate before
reading the enclosed
instruction manual.
2. Use adequate protection,
warning and safety
equipment necessary to
protect against hazards
involved in installation and
operation of this equipment.
Do not operate
without guards
in place
Do not touch
hot surfaces
SAFETY WARNING
•Keep hands and clothing away from rotating machinery, inlet and discharge openings.
•Blower and drive mounting bolts must be secured.
•Drive belts and coupling guards must be in place.
•Noise level may require ear protection.
•Blower heat can cause burns if touched.
TUTHILL VACUUM &BLOWER SYSTEMS Springfield, MO USA
NOTICE
The above safety instruction tags were attached to your unit prior
to shipment. Do not remove, paint over or obscure in any manner.
Failure to heed these warnings could result in serious bodily injury
to the personnel operating and maintaining this equipment.
!WARNING
Keep body and
clothing away from
machine openings
Hearing
Protection
Required
!CAUTION
!WARNING
2

TABLE OF CONTENTS
SECTION PAGE
SAFETY INSTRUCTIONS & WARNING TAGS 2
SAFETY PRECAUTIONS 3
INTRODUCTION 4
OPERATING DATA & FLOW DIRECTION BY ROTATION 4
INSTALLATION 5
LUBRICATION & OIL CAPACITIES 6
PREVENTATIVE MAINTENANCE 7
STARTUP CHECKLIST 7
DISASSEMBLY 10
ASSEMBLY 11 –13
INTERNAL ASSEMBLY DRAWING & PARTS LIST 14
EXTERNAL ASSEMBLY DRAWINGS 15
SEAL & BEARING INSTALLATION TOOLS 16 –17
RECOMMENDED LUBRICANTS 17
WARRANTY 18
WARRANTY REGISTRATION CARD 19
TROUBLESHOOTING 8
RECOMMENDED SHUTDOWN PROCEDURE 9
MAXIMUM OPERATING LIMITS 6
SAFETY PRECAUTIONS
For equipment covered specifically or indirectly in this instruction book, it is important that all personnel observe safety
precautions to minimize the chances of injury. Among many considerations, the following should particularly be noted:
•Blower casing and associated piping or accessories may become hot enough to cause major skin burns on
contact.
•Internal and external rotating parts of the blower and driving equipment can produce serious physical injuries. Do
not reach into any opening in the blower while it is operating, or while subject to accidental starting. Cover external
moving parts with adequate guards.
•Disconnect power before doing any work, and avoid bypassing or rendering inoperative any safety or protective
devices.
•If blower is operated with piping disconnected, place a strong, coarse screen over the inlet and avoid standing in
discharge air stream.
•Avoid extended exposure in close proximity to machinery with high intensity noise levels.
•Use proper care and good procedures in handling, lifting, installing, operating, and maintaining the equipment.
•Other potential hazards to safety may also be associated with operation of this equipment. All personnel working in
or passing through the area should be warned by signs and trained to exercise adequate general safety
precautions.
•Hearing protection may be required depending on silencing capabilities.
IMPORTANT
In order to assure you of the full benefits of our product warranty, please complete, tear out and return the warranty
registration card located on the back cover of this manual, or you can register your product online at http://vacuum.
tuthill.com/product_registration
3

4
FLOW DIRECTION BY ROTATION
Refer to the illustrations below before installing inlet and discharge piping.
VERTICAL FLOW HORIZONTAL FLOW
INTRODUCTION
CONGRATULATIONS on your purchase of a new TI850 Industrial Rotary Positive Displacement Blower from Tuthill
Vacuum & Blower Systems. Please examine the blower for shipping damage, and if any damage is found, report it
immediately to the carrier. If the blower is to be installed at a later date make sure it is stored in a clean, dry location and
rotated regularly. Make sure covers are kept on all openings. If blower is stored outdoors be sure to protect it from weather
and corrosion.
TI850 blowers are built to exacting standards and if properly installed and maintained will provide many years of reliable
service. We urge you to take time to read and follow every step of these instructions when installing and maintaining your
Blower. We have tried to make these instructions as straightforward as possible. We realize getting any new piece of
equipment up and running in as little time as possible is imperative to production.
WARNING: Serious injury can result from operating or repairing this machine without first reading the service
manual and taking adequate safety precautions.
IMPORTANT: Record the blower model and serial numbers of your machine in the OPERATING DATA form below. You will
save time and expense by including this reference identification on any replacement part orders, or if you require service or
application assistance.
OPERATING DATA
It will be to the user’s advantage to have the requested data filled in and available in the event a problem should
develop in the booster or the system. This information is also helpful when ordering spare parts.
Model No. __________________________________ V-Belt Size ______________ Length _____________
Serial No. __________________________________ Type of Lubrication:
(Recorded from nameplate on unit) _____________________________
Startup Date ________________________________ ________________________
Blower RPM ________________________________ Pressure ___________________________________
Blower Sheave Diameter ______________________ Vacuum ___________________________________
Motor Sheave Diameter _______________________ Any other special accessories with this unit
Motor RPM _______________ HP ______________ _________________________________________

5
INSTALLATION
WARNING: Users must provide adequate protection, warning and safety equipment necessary to protect personnel
against hazards involved in the installation and operation of this equipment in the system or facility.
Do not use air blowers on explosive or hazardous gases. Casing pressure must not exceed
25 PSIG (1.72 bar g). Each size blower has limits on pressure differential, running speed,
and discharge temperature, which must not be exceeded. These limits are shown on the
Specification Sheet "Maximum Operating Limits” on page 6.
LOCATION
Install the blower in a clean, dry, and well lighted area if possible. Leave plenty of room
around the blower for inspection and maintenance.
FOUNDATION
We recommend a solid foundation be provided for permanent installation. 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 tightening the bolts, check to see that both mounting feet are resting evenly on the
foundation, shim as necessary to eliminate stress on the base when the bolts are tightened.
Where a solid foundation is not feasible, care must be taken to insure that equipment is
firmly anchored to adequate structural members.
DRIVE
When the blower is V-belt driven the sheaves must be positioned so that the hub face of the
blower sheave is not more than 1/4" (6.5 mm) from the blower drive end plate and the driver
sheave is as close to the driver bearing as possible. Care should be taken when installing
sheave onto shaft. The faces of the sheaves should be accurately in line to minimize belt
wear.
Adjust the belt tension to the belt manufacturer’s specifications.
For installations where the blower is to be operated by direct drive, selection of the driver should be such as not to exceed
the maximum speed ratings of the blower. (See Specification Sheet “Maximum Operating Limits” on page 6.)
Aflexible type coupling should be used to connect driver and blower shafts. The two shafts must be aligned
within .005”(.13 mm) T.I.R. (Total Indicated Runout) Coupling face run out .003”(.8 mm ) T.I.R.
PROTECTIVE MATERIALS
Remove protective materials from the shaft.
Remove the protective covers from the inlet and outlet ports and inspect the interior for dirt and foreign material.
WARNING: Keep hands, feet, foreign objects and loose clothes from inlet and outlet openings to avoid injury
or damage if lobes are to be rotated at this point.
LUBRICATION
Do not start up the blower until you are positive that it has been properly and fully lubricated. (See Lubrication Section on
page 6.)
PIPING
Inlet and outlet connections on all blowers are large enough to handle maximum volume with minimum friction loss.
Maintain same diameter piping. Silencers must not be supported by the blower. Stress loads and bending moments must
be avoided.
Be certain all piping is clean internally before connecting to the blower. We recommend placing a 16-mesh wire screen
backed with hardware cloth at or near the inlet connections for the first 50 hours of use until the system is clean. Make
provisions to clean the screen after a few hours of operation and completely discard it once the system is clean, as it will
eventually deteriorate and small pieces going into the blower can cause serious damage. A horizontal or vertical air flow
piping configuration is easily achieved by rearranging the mounting feet position.
WARNING: Do not operate equipment without adequate silencing devices since high noise level may cause hearing
damage. (Reference OSHA Standards.)
RELIEF VALVES
We recommend the use of relief valves to protect against excessive pressure or vacuum conditions. These valves should be
tested at initial start-up to be sure they are properly adjusted to relieve at or below the maximum pressure differential rating
of the blower.
CAUTION: Upon completion of the installation, and before applying power, rotate the drive shaft by hand. It must
move freely. If it does not, look for uneven mounting, piping strain, excessive belt tension or coupling
misalignment or any other cause for binding. If blower is removed and still does not rotate freely, check
inside the blower housing for foreign material.
Examples of Soft Foot

LUBRICATION
Every Tuthill blower is factory tested, oil drained and shipped dry to its installation point. Both independent oil reservoirs
must be filled to the proper level before operation.
Shaft bearings at the gear end of the blower are splash lubricated by one or both gears dipping into an oil reservoir formed
in the gear end plate and cover. Shaft bearings at the drive end of the blower are lubricated by a slinger assembly dipping
into an oil reservoir. Before starting the blower, fill oil sumps as shown below under “Filling Procedure.” Tuthill approved
mineral-based, synthetic and food grade lubricants are listed on page 17.
FILLING PROCEDURE
1. Remove fill plugs or breathers from both gear end and drive end plates.
2. SLOWLY pour oil through fill until oil appears in the oil sight glass. Bring oil level to center of sight glass.
3. Verify oil level is at proper level in BOTH gear end and drive end sight glasses.
4. Replace fill plugs or breathers that were removed in step 1.
CAUTION: Do not start the blower until you are certain that oil is in BOTH ends of the blower. Check BOTH
sight glasses to ensure that oil levels are correct before starting. Operation of the blower without
proper lubrication will cause the blower to fail and void its warranty.
WARNING: NEVER ATTEMPT TO CHANGE OIL WHILE THE BLOWER IS IN OPERATION. Failure to heed this
warning could result in damage to the equipment and/or serious personal injury. Oil level must be
checked while the blower is not running.
APPROXIMATE OIL CAPACITIES *
Recommended Lubricants are shown on Page 17
Breathers
(Note: Breathers must be on top)
Fill Plugs
Sight Glasses
(Fill to center)
Magnetic Drain Plugs
(always on bottom of blower)
HORIZONTAL AIR FLOW
(17/87 SERIES)
VERTICAL AIR FLOW **
(46/88 SERIES)
6
Horizontal Air Flow (17/87 Series) Vertical Air Flow (46/88 Series)
GEAR END DRIVE END GEAR END DRIVE END
20 ounces (.59 L ) 24 ounces (.71 L) 35 ounces (1.04 L) 39 ounces (1.15 L)
*Oil capacities are based on filling from dry condition. Less oil may be needed depending on emptiness of oil reservoir(s)
after draining.
Always fill the gear housing until oil drips out of the oil level hole. Replace plugs in their respective holes. Following this
procedure will insure proper oil level.
MODEL RPM PRESSURE
PSIG (mbar g)
VACUUM
In. Hg (mbar g)
TEMPERATURE RISE
F° (C°)
TI850 3000 20 (1380) 17 (575) 300 (166)
MAXIMUM OPERATING LIMITS

PREVENTATIVE MAINTENANCE
A good maintenance program will add years of service to your blower.
A newly installed blower should be checked frequently during the first month of operation, especially lubrication. Check oil
level in both the drive end and gear end of the blower and add oil as needed. Complete oil changes are recommended
every 1000 operating hours, or more frequently depending on the type of oil and oil operating temperature.
The following is recommended as a minimum maintenance program.
DAILY MAINTENANCE WEEKLY MAINTENANCE MONTHLY MAINTENANCE
1. Check and maintain oil level, and
add oil as necessary.
2. Check for unusual noise or vibration
(See Troubleshooting on page 8)
1. Clean all air filters. A clogged air filter
can seriously affect the efficiency of
the blower and cause overheating
and oil usage.
2. Check relief valve to assure it is
operating properly
1. Inspect the entire system for leaks.
2. Inspect condition of oil and change if
necessary (see page 6)
3 Check drive belt tension and tighten if
necessary.
START-UP CHECKLIST
We recommend that these startup procedures be followed in sequence and checked (v) off in the boxes provided in any of
the following cases:
•During initial installation
•After any shutdown period
•After maintenance work has been performed
•After blower has been moved to a new location
Date Checked
1. Check the unit for proper lubrication. Proper oil level cannot be over-emphasized. Refer to
Lubrication Section.
2. Check Alignment.
For Direct Drive: Check coupling and shaft alignment.
For Belt Drive: Check for proper belt alignment and tension.
3. Turn the rotors by hand to be certain they do not bind.
WARNING: Disconnect power. Make certain power is off and locked out before
touching any rotating element of the blower, motor or drive
components.
4. "Bump" the unit with the motor a few times to check rotation and to be certain it turns
freely and smoothly.
5. Start the unit and operate it for 30 minutes at no load. During this time. feel the cylinder
for hot spots. If minor hot spots occur, refer to the Troubleshooting Section (page 8).
6. Apply the load and observe the operation of the unit for one hour. Check the unit
frequently during the first day of operation.
7. If minor malfunctions occur, discontinue operation and refer to the Troubleshooting
Section (page 8).
7

TROUBLESHOOTING
Although Tuthill TI850 blowers are well designed and manufactured, problems may occur due to normal wear and the
need for readjustment. The chart below lists symptoms that may occur along with probable causes and remedies.
SYMPTOM PROBABLE CAUSE REMEDIES
Loss of oil. Gear housing not tightened properly.
Lip seal failure.
Insufficient sealant.
Loose drain plug.
Tighten gear housing bolts.
Disassemble and replace lip seal.
Remove gear housing and replace sealant. (See Disassembly
section on page 10)
Tighten drain plug.
Excessive
bearing or
gear wear.
Improper lubrication.
Excessive belt tension.
Coupling misalignment.
Correct oil level. Replace dirty oil. (See Lubrication section on
page 6)
Check belt manufacturer’s specifications for tension and adjust
accordingly.
Check carefully, realign if necessary.
Lack of
volume.
Slipping belts.
Worn lobe clearances.
Speed too low.
Obstruction in piping.
Check belt manufacturer’s specifications for tension and adjust
accordingly.
Check for proper clearances (See Assembly Clearances on
page 13)
Increase blower speed within limits.
Check system to assure an open flow path.
Knocking. Unit out of time.
Distortion due to improper mounting or
pipe strains.
Excessive pressure differential.
Worn gears.
Re-time.
Check mounting alignment and relieve pipe strains.
Reduce to manufacturer’s recommended pressure. Examine
relief valve and reset if necessary.
Replace timing gears (See Disassembly and Inspection section
on page 10)
Excessive
blower
temperature.
Too much or too little oil in gear reservoir.
Too low operating speed.
Clogged filter or silencer.
Excessive pressure differential.
Elevated inlet temperature.
Worn lobe clearances.
Check oil level. (See Lubrication section on page 6)
Increase blower speed within limits.
Remove cause of obstruction.
Reduce pressure differential across the blower.
Reduce inlet temperature.
Check for proper clearances (See Assembly Clearances on
page 13)
Rotor end or
tip drag.
Insufficient assembled clearances.
Case or frame distortion.
Excessive operating pressure.
Excessive operating temperature.
Correct clearances (See Assembly Clearances on page 13)
Check mounting and pipe strain.
Reduce pressure differential.
Reduce pressure differential or reduce inlet temperature.
Vibration. Belt or coupling misalignment.
Lobes rubbing.
Worn bearings or gears.
Unbalanced or rubbing lobes.
Driver or blower loose.
Piping resonance.
Check carefully, realign if necessary.
Check cylinder for hot spots, then check for lobe contact at
these points. Correct clearances (See Assembly Clearances on
page 13).
Check condition of gears and bearings; replace if necessary.
Possible buildup on casing or lobes, or inside lobes. Remove
buildup and restore clearances.
Check mounting and tighten if necessary.
Check pipe supports, check resonance of nearby equipment,
check foundation.
8

9
RECOMMENDED SHUTDOWN PROCEDURE
TO MINIMIZE RISK OF FREEZING OR CORROSION
When high humidity or moisture is present in an air piping system, condensation of water can occur after the blower is shut
down and the blower begins to cool. This creates an environment favorable to corrosion of the iron internal surfaces, or in
cold weather, the formation of ice. Either of these conditions can close the operating clearances, causing the blower to fail
upon future start-up.
The following shutdown procedure outlined below minimizes the risk of moisture condensation, corrosion and freezing.
Care must be taken so as not to overload or overheat the blower during this procedure.
1. Isolate the blower from the moist system piping, allowing the blower to intake atmospheric air. Operate the blower under
a slight load allowing the blower to heat within safe limits. The heat generated by the blower will quickly evaporate
residual moisture.
2. For carpet cleaning applications, after the work is completed, simply allow the blower to run a few (3-5) minutes with the
suction hose and wand attached. The suction hose and wand will provide enough load to the blower to evaporate the
moisture quickly.
3. For extended shutdown, inject a small amount of a light lubricating oil such as 3-in-One®or a spray lubricant such as
WD-40®into the inlet of the blower just prior to shutdown. The lubricant will provide an excellent protective coating on
the internal surfaces. If using a spray lubricant, exercise care to prevent the applicator tube from getting sucked into the
blower. The applicator tube will damage the blower, most likely to the point that repair would be required.
3-in-One and WD-40 are registered trademarks of WD-40 Company.
NOTES:

DISASSEMBLY
1. Remove all oil drain plug and vent plug from both ends of the blower. Before removing any parts,match mark each
component with a punch. This will allow the blower to be reassembled in the same position.Match mark covers,
endplates, housing, cover extension, and both rotors.
2. Remove drive key from drive shaft. Remove gear end cover (Item 7). Remove drive end cover (Item 6). This is best
accomplished by using to small pry bars at the dowel pins. Tap on cover with a mallet while putting pressure on the
cover with the pry bar. The cover will slowly move off the dowel pins. Inspect seal area on drive shaft for groves and
burrs. Remove drive shaft seal (Item 17) from drive end cover. Remove oil slinger assemblies (Item 13)
3. Remove bolts (Item 34) and washers (Item 24) from rotor shafts on the gear end. To remove gears(Item 8 & 9) from
rotor shafts by using gear puller in figure 1A. Rotate drive gear 3 teeth clockwise from the timing marks on the face of
the gears, then remove the driven gear. Inspect gear teeth for wear and pitting. Inspect rotor shaft keyway for wear and
damage.
CAUTION: Blower rotors must rotate freely in order for timing gears to be removed correctly. If blower
rotors do not move freely both timing gears must be pulled simultaneously. If gears are removed
improperly, this will cause damage to the rotor keyways and possibly to the timing gears.
4. Remove bolts (Item 27) from extension covers (Item 5). Using pry bars and a mallet slowly remove the extension cover
from the gear end and drive endplates (Item 4) as explained in step 2. Remove gasket (item 16) from endplates on both
gear end and drive end.
5. Use jacking screws on endplate (Item 4), from the housing (Item 3). Rotors (Items 1 & 2) will be removedfrom the
housing. When the gear end endplate is removed. Take a gear puller and attach to the gear endplate with the center of
the puller in the center of the rotor shaft. Apply pressure pushing the rotor away from the endplate. Repeat this
operation until both rotors have been removed. Remove the inner sleeve of the seal housing from the rotor shafts with a
puller. Inspect and clean seal area on the rotor shaft.
6. Remove bearings (Items 9 & 10), seal housing (Item 12), slingers (Item ), bearing shield and bearing shims from
endplate. Use a hammer and bar to drive bearing and seal housing from endplates. Inspect bearing wear pattern and
seal for wear and heat marks. Clean all parts before inspecting. Check rotors bearing and seal fits for bearing spinning
along with seal housing on rotor shaft. Check bearing bores and seal bores in endplate for spinning of bearings and
seal housings.
Figure 1 -Timing Marks on Gears Figure 1A -Illustration of Bar Puller
DISASSEMBLY NOTES:
10