Tuthill T850, T1050 Operator's Manual

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M-D Pneumatics

Rotary Positive Displacement Truck Blower

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Manual 2020 0217 ENG

T850 / T1050 - Standard Weight

OPERATOR’S MANUAL

Operator’s Manual: Tuthill T850/T1050 - Standard Weight Rotary Positive Displacement Truck Blower

Tuthill Vacuum & Blower Systems tuthillvacuumblower.com 800.825.6937

Disclaimer Statement:

All information, illustrations and speciﬁ cations in this manual are based on the latest information available at the time of publishing. The illustrations used in this manual are intended as representative reference views only. Products are under a continuous improvement policy. Thus, information, illustrations and/or speciﬁ cations to explain and/or exemplify a product, service or maintenance improvement may be changed at any time without notice.

Rights Reserved Statement:

No part of this publication may be reproduced or used in any form by any means – graphic, electronic or mechanical, including photocopying, recording, taping or information storage and retrieval systems – without the written permission of Tuthill Vacuum & Blower Systems.

Table of Contents

Introduction .................................................................................. 1

Safety ............................................................................................ 2

Graphic Conventions in this Manual ..................................................... 2

Safety Instructions................................................................................. 3

Safety Precautions ..................................................................... 3

Installation .................................................................................... 5

Safety Checklist .................................................................................... 5

Speciﬁ cations ........................................................................................ 6

Outline Drawings ................................................................................... 7

PTO Selection for Transmission ............................................................. 8

Engine Speed ....................................................................................... 8

Pressure Relief Valve ............................................................................ 8

Air Filter ................................................................................................. 8

Suction and Discharge Piping .............................................................. 8

Mounting Bracket .................................................................................. 8

Check Valve .......................................................................................... 8

Mufﬂ ers and Discharge Filtration .......................................................... 8

Vacuum Valve ........................................................................................ 9

Performance Curves ........................................................................... 10

Operator’s Manual 2020 0217 ENG

Table of Contents

Operation .................................................................................... 13

Maintenance ............................................................................... 14

Disassembly and Reassembly .................................................. 15

Lubrication .......................................................................................... 11

Filling Procedure ...................................................................... 11

Regular Maintenance .......................................................................... 14

Disassembly ........................................................................................ 15

Assembly ............................................................................................ 16

Gear End Assembly ................................................................. 16

Drive End Assembly ................................................................. 17

Checking Interlobe Clearance ................................................. 18

Assembly Clearances ................................................................ 20

Special Tool Drawings ............................................................... 21

Assembly Drawing and Parts List ............................................ 23

Assembly Drawing .............................................................................. 23

Parts List ............................................................................................. 24

Blower Installation Components ......................................................... 25

Operator’s Manual 2020 0217 ENG

INTRODUCTION

CONGRATULATIONS on the purchase of a new Tuthill Truck Blower. 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 the blower is stored outdoors, be sure to protect it from weather and corrosion.

Tuthill Truck Blowers are built to exacting standards and, if properly installed and maintained, will provide many years of reliable service. Read and follow every step of these instructions when installing and maintaining the blower.

OTE: N Record the blower model and serial

numbers of the machine in the OPERATING DATA form on the inside back cover of this manual. Use this identiﬁ cation on any replacement part orders, or if service or application assistance is required.

Operator’s Manual 2020 0217 ENG

SAFETY

GRAPHIC CONVENTIONS IN THIS MANUAL

The following hazard levels are referenced within this manual:

DANGER

Indicates a hazardous situation that, if not avoided, will result in death or serious injury.

WARNING

Indicates a hazardous situation that, if not avoided, could result in death or serious injury.

CAUTION

Indicates a hazardous situation that, if not avoided, could result in minor or moderate injury.

OTE: N Indicates a procedure, practice, or

condition that should be followed in order for the equipment to function in the manner intended.

CAUTION

Read manual before operation or bodily harm may result. Attention should be given to the safety related sections of this manual.

Indicates a situation that can cause damage to the engine, personal property, and/or the environment or cause the equipment to operate improperly.

Operator’s Manual 2020 0217 ENG

Safety

WARNING

Keep body and clothing away from machine openings.

WARNING

Keep body

and clothing away

from drive shaft.

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.

WARNING

Hearing

Protection

Required

CAUTION

Do not

touch hot

surfaces.

Safety Precautions

For equipment covered speciﬁ cally or indirectly in this operator’s manual, it is important that all personnel observe safety precautions to minimize the chances of injury. Among many considerations, the following should particularly be noted:

• Rotating shafts can be dangerous. You can snag clothes, skin, hair, hands, etc. This can cause serious injury or death.

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 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.

• Do not work under the vehicle while the engine is running.

• Do not work on a shaft (with or without a guard) while the engine is running.

• Do not engage or disengage driven equipment by hand from under the vehicle while the engine is running.

• In order to avoid becoming entangled, install the power take off and/or shaft behind the frame rail, tanks, battery box, etc.

• If power take off and/or shaft are still exposed after installation, install a guard.

• Install a support strap when servicing a drive shaft to prevent personal injury.

A SERIOUS OR FATAL INJURY CAN OCCUR:

• If you lack proper training

• If you fail to follow proper procedures

• If you do not use proper tools and safety equipment

Operator’s Manual 2020 0217 ENG

Safety

• If you assemble drive line components improperly

• If you use incompatible drive line components

• If you use worn out or damaged drive line components

• If you use drive line components in a non-approved application

This manual contains safety instructions. Read, understand and follow this manual.

• Get proper training

• Learn and follow safe operating procedures

• Use proper tools and safety equipment

• Use proper components in good condition

Operator’s Manual 2020 0217 ENG

INSTALLATION

SAFETY CHECKLIST

Complete this checklist before operating the blower.

TRUCK NUMBER BLOWER MODEL NUMBER

GEARBOX NUMBER BLOWER SERIAL NUMBER

P.T.O. NUMBER DATE INSTALLED

P.T.O. RATIO INSPECTED BY

 Is Tuthill mounting kit used?

 Is ratio and horsepower correct for PTO?

 Mount PTO as per manufacturer’s

recommendations and reﬁ ll transmission.

 Ensure oil levels are at the center of the sight

glass when blower is not running.

 Without drive line connected, can the blower be

rotated by hand?

 Is the drive line installed at the correct angle and

phase with all fasteners secured?

 Ensure PTO rotates blower in the correct

direction indicated by arrow.

 Ensure air inlet ﬁ lter is connected and located

away from truck exhaust.

 Remove Camlock dust cap, and discharge

piping open to atmosphere.

 With tractor engine at idle, slowly engage PTO.

Check for correct rotation.

 Slowly bring blower up to operating speed.

 Check for vibration, mechanical noise, oil leaks

and mounting integrity.

 Stop blower, connect blower discharge hose to

trailer, and run blower at operating pressure of trailer for 15 minutes at normal speed.

 Does relief valve allow 15 psig (1 bar g)

pressure?

 Does engine maintain correct RPM throughout

test?

 Shut down machine. Check Shur-Melt® plugs,

relief valve, ﬁ lter, piping, and oil sumps for integrity.

 Is correct engine speed label visible in cab?

Operator’s Manual 2020 0217 ENG

Installation

SPECIFICATIONS

WARNING

The blower and accessories will become hot enough to cause serious skin burns on contact.

Rotating machinery is dangerous.

Always wear ear protection when near an operating blower.

MODEL AIR FLOW RANGE

T850 225 – 565 CFM

(527 – 1,700 m³/h)

T1050 450 – 1,200 CFM

(764 – 2,039 m³/h)

OTE: N Reduce the maximum operating pressure by 1 psi (0.068 bar) for each 2,000 feet (610 m) of

elevation above sea level. Example: At an altitude of 4,000 feet (1,219 m), the maximum working pressure of the blower will decrease by 2 psi (0.137 bar).

Table 3-1 – Speciﬁ cations

MAXIMUM

PRESSURE

20 psig

(1.37 bar g)

18 psig

(1.24 bar g)

MAXIMUM

VACUUM

17 inch-Hg (575 Mbar)

RPM RANGE

1,000 – 3,000

1,450 – 3,000

Operator’s Manual 2020 0217 ENG

OUTLINE DRAWINGS

Dimensions shown are not on a controlled document and as such are subject to change. Certiﬁ ed drawings are available through your local Tuthill Truck Blower Distributor. Dimensions are shown in inches and millimeters.

Installation

MODEL

T850

T1050

OIL FILL LOCATION HORIZONTAL AIR FLOW

OIL LEVEL GAUGE VERTICAL AIR FLOW

OIL FILL LOCATION VERTICAL AIR FLOW

OIL DRAIN HORIZONTAL AIR FLOW

ABC

22.69

12.48

576

13.73

25.19

640

317

349

11.72

298

12.13

308

8 × 1/2-13 UNC

2.68

5.25

133

17.97

456

2.28

3/8" KEY

Ø 1.625"

2.68 8 × 5/8-11 UNC

2.94

5.86

149

Figure 3-1 – Outline Drawings

Operator’s Manual 2020 0217 ENG

Installation

PTO SELECTION FOR TRANSMISSION

Blower speed and pressure require adequate horsepower and torque. See Performance Curves on page 10.

Engine speed and blower speed require the adequate ratio PTO be installed for proper blower operation.

6- and 8-bolt transmissions provide the proper space for blower installation.

ENGINE SPEED

Keep engine speed constant when the blower is in the operating cycle. Install a constant-speed governor or throttle control system to ensure proper blower operation.

PRESSURE RELIEF VALVE

Size the pressure relief valve for the correct air ﬂ ow and pressure rating. Install the valve as close to the blower as possible and before the check valve.

Ensure that pipe compound is used on the threads of the male end of the relief valve to seal against air leakage.

An undersized air ﬁ lter will cause the blower to operate at higher temperatures. This can cause blower to overheat, causing irreparable damage.

SUCTION AND DISCHARGE PIPING

All piping should be free and clear of any welding slag or foreign material.

The suction piping requirement is a minimum of 5 in. (127 mm) diameter for proper ﬂ ow to the blower.

Discharge piping is a minimum of 4 in. (102 mm) diameter.

Do not use a rubber elbow in the suction line during vacuum operation. The elbow will fail causing the blower to overheat. This will cause damage to the blower.

MOUNTING BRACKET

To reduce stress on the blower housing, be sure to properly mount the blower with the correct bracket.

An undersized or improperly set relief valve will cause the blower to operate at higher temperatures. This can cause the blower to overheat, causing irreparable damage.

AIR FILTER

Select a ﬁ lter suitable for the air ﬂ ow requirement of the application. Use air ﬁ lters on food and plastic products to prevent contamination.

CHECK VALVE

Minimum restriction for application. Mount downstream of the relief valve. Size the valve for maximum air ﬂ ow (CFM or m³/hr).

MUFFLERS AND DISCHARGE FILTRATION

Minimum restriction for application. Mount downstream of the relief valve.

Operator’s Manual 2020 0217 ENG

VACUUM VALVE

Installation

Size for proper air ﬂ ow and vacuum rating.

This valve should be located before the blower inlet ﬁ lter. This valve is normally mounted on the trailer.

VERTICAL FLOW

CW ROTATION CW ROTATIONCCW ROTATION

LEFT DRIVE

DISCHARGE

INTAKE

DISCHARGE DISCHARGE

To properly protect the blower from overheating when vacuum loading, install a vacuum valve.

HORIZONTAL FLOW

BOTTOM DRIVE

DISCHARGEINTAKE

TOP DRIVE

INTAKE

Figure 3-2 – Flow Direction and Rotation

Operator’s Manual 2020 0217 ENG

Installation

PERFORMANCE CURVES

PERFORMANCE CURVES (US)

1000

900

800

700

600

500

400

300

200

AIRFLOW AT INLET (CFM)

1000

900

800

700

600

500

400

300

200

AIRFLOW AT INLET (CFM)AIRFLOW AT INLET (m³/h)

PERFORMANCE CURVES (METRIC)

1750

1500

1250

1000

750

500

250

1750

1500

1250

1000

750

500

250

AIRFLOW AT INLET (m³/h)

T850 PRESSURE CURVE T1050 PRESSURE CURVE

AIRFLOW BASED UPON INLET CONDITIONS OF: 14.7 PSIA & 70° F # PSIG DISCHARGE PRESSURE

1000 1500 2000

2500 3000

RPM

T850 VACUUM CURVE T1050 VACUUM CURVE

AIRFLOW BASED UPON INLET: 70° F DISCHARGE: 29.92” Hg Abs

1000 1500 2000

T850 PRESSURE CURVE T1050 PRESSURE CURVE

AIRFLOW BASED UPON INLET CONDITIONS OF: 1 bar & 20° C DENSITY: 1.2 kg/m³

BAR DISCHARGE PRESSURE

1000 1500 2000

T850 VACUUM CURVE T1050 VACUUM CURVE

AIRFLOW BASED UPON INLET: 20° C DISCHARGE: 1 bar DENSITY @ 20° C & 1 bar 1.2 kg/m³

MBAR INLET VACUUM

1000 1500 2000

2500 3000

RPM

0.25

0.75

1.00

1.25

1.38

bar

1.38

1.25

1.00

0.75

0.25

2500 3000 3500

RPM

200 300 400 500

mbar

500

400

300 200

2500 3000 3500 1000 1500 2000

RPM

2 5 8 12 15 18 20 PSIG

PSIG 20 18 15 12 8 5 2

2 6 10 14 17 In. Hg

In. Hg 17 14 10 6 2

BHP 100

KW 80

KW 25

1350

AIRFLOW BASED UPON INLET CONDITIONS OF:

1200

# PSIG DISCHARGE PRESSURE

1050

900

750

600

450

300

150

14.7 PSIA & 70° F

AIRFLOW AT INLET (CFM)

1000 1500 2000

1350

AIRFLOW BASED UPON

1200

INLET: 70° F DISCHARGE: 29.92” Hg Abs

1050

900

750

600

450

300 150

AIRFLOW AT INLET (CFM)

1000 1500 2000

2250

AIRFLOW BASED UPON INLET CONDITIONS OF: 1 bar & 20° C

2000

DENSITY: 1.2 kg/m³

1750

MBAR DISCHARGE PRESSURE

1500

1250

1000

750

500

250

AIRFLOW AT INLET (m³/h)

1000 1500 2000

2250

AIRFLOW BASED UPON INLET: 20° C DISCHARGE: 1 bar

2000

DENSITY @ 20° C & 1 bar 1.2 kg/m³

1750

MBAR INLET VACUUM

1500 1250

1000

750

500

250

AIRFLOW AT INLET (m³/h)

2500 3000

RPM

2500 3000

RPM

2500 3000 3500

RPM

2500 3000 3500

RPM

0.25

0.75

1.00

1.25

1.38

bar

1.38

1.25

1.00

0.75

0.25

200 300 400 500

mbar

500

400

300

200

2 5 8 12 15 15 18 PSIG

PSIG 18

2 5 8 10 12 16 17 In. Hg

In. Hg 17 16 12 10 8 5 2

BHP 120

105

90 75

BHP 60

KW 70

20 10

KW 30

15 10

5 0

Figure 3-3 – Performance Curves

Operator’s Manual 2020 0217 ENG

LUBRICATION

Installation

Every Tuthill blower is factory-tested, oil-drained, and shipped dry. Fill both oil reservoirs to the proper level before operation.

Every Tuthill Truck Blower is supplied with two 1-quart containers of Tuthill PneuLube™ ISO 100 synthetic oil. Before ﬁ lling the blower, check Table 3-2 to conﬁ rm the amount of oil required.

For applications requiring food-grade lubricant, use only Tuthill PneuLube FG synthetic oil.

OTE: N If installing a Tuthill Truck Blower for

vertical air ﬂ ow (optional), additional oil than what is included with the blower will be needed for installation. Tuthill PneuLube is available from your authorized Tuthill Truck Blower Distributor.

Filling Procedure

To ensure the proper oil level, always use this ﬁ lling procedure:

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 and truck is parked on a level surface.

1. Remove the ﬁ ll plugs from both gear end and drive end plates.

2. Slowly pour oil through ﬁ ll until oil appears in the oil sight glass. Bring the oil level to the center of the sight glass.

3. Verify the oil level is at the proper level in both the gear end and drive end sight glasses.

4. Replace the ﬁ ll plugs that were removed in step 1.

Never mix oil types or grades in a Tuthill Truck Blower. Mixing lubricants in the blower will result in gear and bearing failure.

Operator’s Manual 2020 0217 ENG

Installation

HORIZONTAL AIR FLOW

(STANDARD)

FILL PLUGS

SIGHT GLASSES

Fill to center

while parked on a

level surface.

MAGNETIC

DRAIN PLUGS

Always on bottom

of blower

VERTICAL AIR FLOW**

(OPTIONAL)

** If installing a T850 blower for vertical air ﬂ ow (optional), additional oil than what is included with the blower

will be needed for installation. Tuthill PneuLube is available from your authorized Tuthill Truck Blower Distributor.

Figure 3-4 – Oil Fill Locations

HORIZONTAL

AIR FLOW

(STANDARD)

VERTICAL AIR FLOW

(OPTIONAL)

Drive end 0.75 qt (0.71 L) 1.2 qt (1.1 L)

Non-drive (gear) end

0.63 qt (0.60 L) 1.1 qt (1.0 L)

Table 3-2 – Lubrication Capacities

OTE: N Oil capacities are based on ﬁ lling from

dry condition. Less oil may be needed depending on emptiness of oil reservoirs after draining.

Operator’s Manual 2020 0217 ENG

OPERATION

1. Inspect the blower mounting, drive line, PTO, and air ﬁ lter for damage.

2. Remove the Camlock dust cap and connect the hot air hose.

3. Follow the trailer instructions regarding product hose connection and valve operation.

4. Slowly engage PTO with the engine at idle, bring it up to operating speed, and lock the engine at the recommended speed (shown in the cab).

5. Unload the trailer as per trailer manufacturer’s recommendation. Do not exceed the maximum tank pressure.

6. While discharging, visually check the blower for vibration, mechanical noise or excessive heat.

7. If the relief valve is opening, adjust the proportioning valve to reduce the tank pressure.

WARNING

The blower and accessories will become hot enough to cause serious skin burns on contact.

Rotating machinery is dangerous.

Always wear ear protection when near an operating blower.

8. Reduce pressure to zero as per the trailer manufacturer’s instructions.

9. Disengage PTO. No cool-down period is required.

10. Disconnect the blower hose and replace the Camlock dust cap.

Operator’s Manual 2020 0217 ENG

MAINTENANCE

REGULAR MAINTENANCE

A well-designed maintenance program will add years of service to the blower.

Check a newly installed blower frequently during the ﬁ rst month of operation, especially lubrication. Check the oil level and add oil as needed. Complete oil changes are recommended every 500 operating hours, or more frequently depending on the type of oil and operating temperature. The following is recommended as a minimum maintenance program. An oil analysis program is recommended.

DAILY WEEKLY MONTHLY SEMIANNUALLY

1. Check and maintain oil level, and add oil as necessary.

2. Check air ﬁ lter restriction indicator.

1. Clean the air ﬁ lter. A clogged air ﬁ lter can seriously affect the efﬁ ciency of the blower and cause overheating and oil usage.

2. Check the relief valve to make sure it is operating properly.

1. Inspect the entire system for leaks.

2. Inspect the condition of the oil and change if necessary.

Operator’s Manual 2020 0217 ENG

1. Inspect the drive line bearings.

2. Change the oil even if 500 operating hours has not been reached.

DISASSEMBLY AND REASSEMBLY

DISASSEMBLY

OTE: N 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 the covers, end plates, housing, cover extension, and both rotors.

1. Remove oil drain plugs and vent plugs from both ends of the blower.

2. Remove the drive key from the drive shaft. Remove the gear end cover. Remove the drive end cover. This is best accomplished by using two small pry bars at the dowel pins. Tap on the cover with a mallet while putting pressure on the cover with the pry bar. The cover will slowly move off the dowel pins. Inspect the seal area on the drive shaft for grooves and burrs. Remove the drive shaft seal from the drive end cover. Remove the oil slinger assemblies.

3. Remove the bolts and washers from the rotor shafts on the gear end. Remove the timing gear from the rotor shaft by using a gear puller (see Figure 6-1). Rotate the timing gear to the right and left, 3 teeth each direction from the timing marks on the face of the gears, as the gear is being removed. Inspect the gear teeth for wear and pitting. Inspect the rotor shaft keyway for wear and damage.

Snap-On P/N CJ83-3

or equivalent

(Thru)

Snap-On

P/N CJ66-15-3

or equivalent

Drill Ø 11/16”

3/4”

Ta p 3/4” - 16 UNF

1 7/8”

15/16”

2”

Figure 6-1 – Gear Puller

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 the bolts from the extension covers. Using pry bars and a mallet, slowly remove the extension cover from the gear end and drive end plates as described in step 2. Remove the gasket from the end plates on both the gear end and drive end.

7/16” × 1” Slot

1”

2 5/8”

5 1/4”

Operator’s Manual 2020 0217 ENG

Disassembly and Reassembly

5. Use jacking screws on the end plate from the housing. The rotors will be removed from the housing when the gear end end plate is removed. Use a gear puller and attach to the gear end plate with the center of the puller in the center of the rotor shaft. Apply pressure, pushing the rotor away from the end plate. Repeat this process until both rotors have been removed. Remove the inner sleeve of the seal housing from the rotor shafts with a puller. Inspect and clean the seal area on the rotor shaft.

6. Remove the bearings, seal housing, slingers, bearing shield, and bearing shims from end plate. Use a hammer and bar to drive the bearing and seal housing from the end plates. Inspect the bearing wear pattern and seal for wear and heat marks. Clean all parts before inspecting. Check the rotor bearings for proper spinning. Check the seal ﬁ ts of the seal housing on the rotor shaft. Check the bearing bores and seal bores in the end plate for spinning of bearings and seal housings.

Gear End Assembly

1. Check all parts to make sure the parts are clean and free of burrs or nicks that may have occurred when the blower was being disassembled. Check the repair kit for the correct parts needed to complete the assembly of the unit. Make sure you have the proper tooling and training required to assemble the blower. Take the time to read and completely understand the instruction manual before you begin.

2. Seat the rotors on a ﬁ xture with the gear end of the rotors upward and in the “T” position, as shown in Figure 6-2. Place a set of 0.006 in. shims on each rotor. Make sure the drive rotor is in the correct location for the proper ﬂ ow and rotation required for the application.

ASSEMBLY

The components in Table 6-1 are available as a kit from Tuthill Vacuum & Blower Systems. These components are replaced during a normal blower overhaul. These parts, at minimum, should be on hand prior to assembly.

DESCRIPTION QTY

Bearing 2

Bearing Shield 2

Seal Assembly 4

Gasket 2

Drive Shaft Seal 1

O-Ring 2

Port Gasket 2

Timing Adjustment Shim 1

Bearing Shim 8

DRIVE DRIVEN

Figure 6-2 – Correct Positioning of Rotor Keyways for Assembly

OTE: N Use Loctite thread sealant on all bolts and

capscrews that are assembled without lock washers.

3. Install the end plate onto the rotor. Make sure the shims on the rotor are still in place. Using a seal pressing tool (see Figure 8-1 for detail), press the seal assembly onto the rotor shafts. Press the oil shield onto the rotor shafts.

OTE: N The oil shield is part of the seal assembly

but must be pressed on after the seal assembly is installed. On lip seal units, the seal must be pressed into the seal housing after the end plates have been installed onto the housing and before the slinger is installed on the rotor shaft.

Table 6-1 – Overhaul Kit

Operator’s Manual 2020 0217 ENG

4. Lay a straightedge across the top of the rotor shafts. Put a depth micrometer on the straightedge and measure the distance to the bearing shoulder on the end plate and the distance to the inner seal housing shoulder. Calculate the difference. This will be the amount of bearing shim needed for the proper clearance on the gear end. Install bearing shims and press in the gear end bearings until the bearing bottoms are against the bearing shims. Remove the assembly from the ﬁ xture and remove 0.006 in. of shim from between the end plate and the rotors.

Disassembly and Reassembly

Drive Gear

Figure 6-4 – Timing Marks Matched

Press the timing gear assembly onto the rotor with the timing marks aligned on the gear as shown in Figure 6-5.

Driven Gear

Figure 6-3 – Using Depth Micrometer to Determine End Clearance

5. Install the housing to the gear end end plate, and tighten the bolts to secure the end plate to the housing. Install the gasket onto the end plate. Install the extension cover onto the end plate and tighten securely. Check the gear end clearance between the rotors and end plate.

OTE: N Install the bearing retaining washer at

this time if the blower requires retainers. Then, check the gear end clearance of the unit.

6. Install the gear key into the keyway of each rotor. Make sure the keyways are in the correct position for the timing gears, as shown in Figure 6-4.

Drive Gear

Driven Gear

Figure 6-5 – Timing Marks Advanced 3 Teeth (Reference Marks Matched)

Install the rotor shaft washer and tighten. Check the gear end clearance and record it.

OTE: N If gear end clearances change, bearing

shims may need to added or removed to maintain proper clearances.

Drive End Assembly

1. Remove the blower from the ﬁ xture and turn until the drive shaft is facing upward. With a straightedge placed on the blower housing, check the clearance between the rotor and the straight edge using feeler gauges. Make sure the drive end has the proper clearances.

Operator’s Manual 2020 0217 ENG

Disassembly and Reassembly

2. Place the end plate onto the blower housing. Tighten the end plate securely to the housing. Press the seal assembly onto the rotor until the assembly bottoms on the rotor. Continue the process until both seal assemblies are installed. Press the oil shield into place.

Figure 6-7 – Extension Cover Installed Drive End

6. Install the pipe plugs and oil sight glasses into their proper locations, which are determined by the direction of ﬂ ow of the blower.

Figure 6-6 – Seal Assembly Installed into End Plate

OTE: N The oil shield is part of the seal assembly

but must be pressed on after seal assembly is installed. On lip seal units, the seal must be pressed into the seal housing after the end plates have been installed onto the housing and before the slinger is installed on the rotor shaft.

3. Install the bearing shields into the end plate. Press the bearing into the end plate until the bearing bottoms to the shoulder of the end plate. Install the gasket and the extension cover, and tighten securely to the end plate.

4. Install the drive end spacer onto the rotor shafts. Position the oil slinger assembly onto the drive shaft of the blower. Install the oil slinger assembly onto the driven rotor. Install rotor washer and bolt. Tighten the bolt securely to the shaft.

5. Install O-ring into drive end cover. Install the drive cover onto the extension cover. Tighten the cover securely to cover the extension. Install the drive shaft seal into the drive cover.

When installing drive shaft seal, use care not to damage the lip of the seal on the keyway of the drive shaft. Make sure keyway is free of burrs and sharp edges.

Checking Interlobe Clearance

1. The outer gear shell is fastened to the inner hub with four cap screws and located with two dowel pins. Adding and removing shims between the gear shell and the inner hub moves the gear shell axially. The helix causes the gear to rotate, which changes the clearance between the rotor lobes. Adding a shim of 0.030 in. thickness will change the rotor lobe clearance by approximately 0.009 in.

The timing shim is formed from a number of

0.003 in. shims that have been laminated together. They are easily peeled off as necessary or added to correct timing. Use feeler gauges to check the clearance at AA (right-hand reading) and BB (left-hand reading) (see Figure 6-1). The clearance should be adjusted so they are as equal between all lobes as possible – usually between 0.002 and

Operator’s Manual 2020 0217 ENG

Disassembly and Reassembly

0.003 in. For best results, use feeler gauges no larger than 0.006 in.

Example: If AA reading is 0.020 in. and BB reading is 0.008 in., by removing 0.021 in. shims the reading will change 0.006 in. AA should read 0.014 in. and BB should read

0.014 in.

Remember to place timing marks on center and match when removing or installing a gear (see Figure 6-4 and Figure 6-5).

OTE: N Once timing of the rotor has been

completed, check tip-port and tip-dowel clearance and record along with gear end and drive end clearances. Tip-dowel location is when the tip of the rotor is lined up with the dowel pins in the housing. Check the clearance as close to the dowel as possible.

Record A-A Reading Here

3. Install the pipe plugs and sight glasses to the proper location. The direction of ﬂ ow of the blower will determine their location.

Record B-B

Reading Here

Long

Feeler

Gauge

Figure 6-8 – Checking Interlobe Clearance

2. Install the rotor washer and bolt on the gear end rotor shafts. Tighten securely and install the O-ring into the cover. Install the gear end cover to cover the extension, and tighten the bolts so the cover is fastened securely to the cover extension.

Operator’s Manual 2020 0217 ENG

ASSEMBLY CLEARANCES

SUM OF

MODEL

T850

T1050

GEAR END DRIVE END

0.004 – 0.009 in. (0.10 – 0.23 mm)

0.013 – 0.018 in. (0.33 – 0.46 mm)

0.015 – 0.020 in. (0.38 – 0.51 mm)

GEAR END +

DRIVE END

0.021 – 0.022 in.

(0.53 – 0.56 mm)

0.023 – 0.024 in.

(0.58 – 0.61 mm)

INTERLOBE TIP-PORT

0.013 – 0.017 in.

(0.33 – 0.43 mm)

0.013 – 0.017 in.

(0.33 – 0.43 mm)

0.006 – 0.010 in. (0.15 – 0.25 mm)

TIP-DOWEL

0.003 – 0.007 in. (0.08 – 0.19 mm)

Operator’s Manual 2020 0217 ENG

See Figure 8-1 on the following page.

SPECIAL TOOL DRAWINGS

Operator’s Manual 2020 0217 ENG

Special Tool Drawings

SEAL & BEARING INSTALLATION TOOL DRAWINGS

ll dimensions are shown in inches and millimeters.

HYDRAULIC PRESS ROD

2.000”

50.8

DRIVE SHAFT SEAL TOOL

3.625

92.1

3.000

76.2

0.300

7.6

1/2-13UNC-2A BOTH ENDS

0.500”

12.7

CLEARANCE SETTING SPACER

0.128

3.3

2.000”

50.8

1.200

30.5

MATERIAL: TOOL STEEL HEAT TREATED TO 40-42 Rc

2.365

1.628

41.4

SECTION A-A

1.908

48.5

± .008

± .02

.040 × 45°

1.0 × 45°

60.1

3.012

76.5

1.954

49.6

SECTION A-A

2.363

60.0

END PLATE PRESS TOOL END PLATE SEAL PRESS TOOL

1.750

44.5

ø 3.502

ø 89

ø 4.321

ø 109.8

+0.001

-0.000

+0.025

-0.000

0.200

5.1

2.850

3.496

88.8 72.4

SECTION A-A

2.300

58.4

2.750

69.9

0.375

6.200

157.5

3.500

88.9

1.750

44.5

.125 × 45°

3.2 × 45°

9.5

2.375

60.3

.040 × 45°

1.0 × 45°

ø 0.258

ø 6.6

GEAR PRESS SPACER LONG SHAFT BEARING PRESS TOOL

1.500

38.1

R 0.125

.040 × 45°

1.0 × 45°

10.550

268.0

10.125

257.2

3.2

1.895

± .005

48.1

± .013

SECTION A-A

0.500

12.7

.040 × 45°

1.0 × 45°

2.750

69.9

ø 2.500

ø 63.5

ø 0.531

ø 13.5

4.125

104.8

0.220

5.6

0.220

1.750

44.5

5.6

1.990

50.5

PISTON CARRIER & SLINGER INSTALLATION TOOL ROTOR SHAFT LIP SEAL PRESSING TOOL

9.750

247.7

9.300

236.2

2.000

50.8

SECTION A-A

Figure 8-1 – Seal Bearing and Installation Tools

0.750

3.405

86.5

19.1

0.156

2.875

73.0

4.0

R .06

1.5

9.219

234.2

2.000

10.125

257.2

50.8

0.625

15.9

.040 × 45°

1.0 × 45°

2.875

73.0

ø 0.266

ø 6.8

SECTION A-A

Operator’s Manual 2020 0217 ENG

ASSEMBLY DRAWING AND PARTS LIST

ASSEMBLY DRAWING

14 39

See Rotor Shaft

Seal Detail 37 38

(Item 12) Below

29530

161718

34 35

ROTOR SHAFT SEAL DETAIL (ITEM 12)

STANDARD

PISTON/SLINGER SEAL

ASSEMBLY

OPTIONAL PISTON/LIP SEAL ASSEMBLY (-LS)

Operator’s Manual 2020 0217 ENG

Assembly Drawing and Parts List

PARTS LIST

ITEM

NO.

1 Drive Rotor 1 1

2 Driven Rotor 1 1

3 Housing 1 1

4 End Plate 2 2

5 Extension Cover 1 1

6 Drive End Cover 1 1

7 Gear End Cover 1 1

8 Timing Gear Assembly

9 Bearings 2 2

10 Bearing 2 2

11 Bearing Shield 2 2

16 Gasket 2 2

17 Drive Shaft Seal 1 1

18 O-ring Cover 2 2

21 Oil Sight Glass 4 4

22 Pipe Plug 12 12

23 Gear Key 2 2

24 Rotor Shaft Washer 3 3

PART DESCRIPTION STD LS*

Set1 Set

Piston/Slinger Seal Assembly

Piston/Lip Seal Assembly

Oil Slinger Drive Assembly

Oil Slinger Driven Assembly

Shur-Melt™ Plug (LH Thread)

Blank Plug (LH Thread)

Socket Head Cap Screw

4–

–4

16 16

ITEM

NO.

29 Lock Washer 32 32

30 Dowel Pin 8 8

31 Bearing Shims 8 8

32 Drive End Spacer 2 2

39**

391** Lock Washer 32 32

40**

42 Shoulder Screw 2 2

43** Lock Washer 2 2

44** Hex Nut 2 2

* LS represents parts and quantities required for

the LS (lip seal) version

** Not shown on drawing

PART DESCRIPTION STD LS*

Socket Head Cap Screw

Pipe Plug (or Breathers on LS model)

16 16

Operator’s Manual 2020 0217 ENG

BLOWER INSTALLATION COMPONENTS

These components are recommended for installation and sold separately.

DESCRIPTION QTY

Basic Mounting Kit, Driver Side 2

Basic Mounting Kit, Passenger Side 2

Port Gasket 2

Blower Port Lock Washer 4

Blower Mounting Bolt 2

Blower Mounting Lock Washer 1

Blower Port Bolt 2

Assembly Drawing and Parts List

Operator’s Manual 2020 0217 ENG

WARRANTY – TRUCK BLOWERS

Subject to the terms and conditions hereinafter set forth and set forth in General Terms of Sale, Tuthill Vacuum & Blower Systems (the Seller) warrants products and parts of its manufacture, when shipped, and its work (including installation and startup) when performed, will be of good quality and will be free from defects in material and workmanship. This warranty applies only to Seller’s equipment, under use and service in accordance with Seller’s written instructions, recommendations and ratings for installation, operating, maintenance and service of products, for a period as stated in the table below. Because of varying conditions of installation and operation, all guarantees of performance are subject to plus or minus 5% variation. (Non-standard materials are subject to a plus or minus 10% variation)

PRODUCT

TYPE

New 18 months from date of shipment, or 12 months after initial startup date, whichever occurs first

Remanufactured 12 months from date of shipment, or 12 months after initial startup date, whichever occurs first

Repair 12 months from date of shipment, or remaining warranty period, whichever is greater

WARRANTY DURATION

THIS WARRANTY EXTENDS ONLY TO BUYER AND/OR ORIGINAL END USER, AND IN NO EVENT SHALL THE SELLER BE LIABLE FOR PROPERTY DAMAGE SUSTAINED BY A PERSON DESIGNATED BY THE LAW OF ANY JURISDICTION AS A THIRD PARTY BENEFICIARY OF THIS WARRANTY OR ANY OTHER WARRANTY HELD TO SURVIVE SELLER’S DISCLAIMER.

All accessories furnished by Seller but manufactured by others bear only that manufacturer’s standard warranty.

All claims for defective products, parts, or work under this warranty must be made in writing immediately upon discovery and, in any event within one (1) year from date of shipment of the applicable item and all claims for defective work must be made in writing immediately upon discovery and in any event within one (1) year from date of completion thereof by Seller. Unless done with prior written consent of Seller, any repairs, alterations or disassembly of Seller’s equipment shall void warranty. Installation and transportation costs are not included and defective items must be held for Seller’s inspection and returned to Seller’s Ex-works point upon request.

THERE ARE NO WARRANTIES, EXPRESSED, IMPLIED OR STATUTORY WHICH EXTEND BEYOND THE DESCRIPTION ON THE FACE HEREOF, INCLUDING WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS OF PURPOSE.

After Buyer’s submission of a claim as provided above and its approval, Seller shall at its option either repair or replace its product, part, or work at the original Ex-works point of shipment, or refund an equitable portion of the purchase price.

The products and parts sold hereunder are not warranted for operation with erosive or corrosive material or those which may lead to build up of material within the product supplied, nor those which are incompatible with the materials of construction. The Buyer shall have no claim whatsoever and no product or part shall be deemed to be defective by reason of failure to resist erosive or corrosive action nor for problems resulting from build-up of material within the unit nor for problems due to incompatibility with the materials of construction.

Any improper use, operation beyond capacity, substitution of parts not approved by Seller, or any alteration or repair by others in such manner as in Seller’s judgment affects the product materially and adversely shall void this warranty.

No employee or representative of Seller other than an Officer of the Company is authorized to change this warranty in any way or grant any other warranty. Any such change by an Officer of the Company must be in writing.

The foregoing is Seller’s only obligation and Buyer’s only remedy for breach of warranty, and except for gross negligence, willful misconduct and remedies permitted under the General Terms of Sale in the sections on CONTRACT PERFORMANCE, INSPECTION AND ACCEPTANCE and the PATENTS Clause hereof, the foregoing is BUYER’S ONLY REMEDY HEREUNDER BY WAY OF BREACH OF CONTRACT, TORT OR OTHERWISE, WITHOUT REGARD TO WHETHER ANY DEFECT WAS DISCOVERED OR LATENT AT THE TIME OF DELIVERY OF THE PRODUCT OR WORK. In no event shall Buyer be entitled to incidental or consequential damages. Any action for breach of this agreement must commence within one (1) year after the cause of action has occurred.

January 2005

OPERATING DATA FORM / PRODUCT REGISTRATION

It is to the user’s advantage to have the requested data filled in below and available in the event a problem should develop in the blower or the system. This information is also helpful when ordering spare parts.

Model No. V-Belt Size Length

Serial No. Type of Lubrication

Start-up Date

Pump RPM Operating Vacuum

Pump Sheave Diameter Any Other Special Accessories Supplied or in Use:

Motor Sheave Diameter

Motor RPM HP

NOTES:

IMPORTANT

All blowers manufactured by Tuthill Vacuum & Blower Systems are date-coded at time of shipment. In order to assure you of the full benefits of the product warranty, please complete, tear out and return the product registration card, or register online at tuthillvacuumblower.com.

For Service & Repair, Technical Support, or Product Sales contact:

Tuthill Vacuum & Blower Systems 4840 West Kearney Street Springﬁ eld, Missouri USA 65803-8702 O 417.865.8715 800.825.6937 F 417.865.2950 tuthillvacuumblower.com

VACUUM & BLOWER SYSTEMS

TUTHILL CORPORATION

Manual 2020 0217 ENG

Tuthill T850, T1050 Operator's Manual

Specifications and Main Features

Frequently Asked Questions

User Manual