Tuthill T855 User manual

M-D Pneumatics™
Rotary Positive Displacement Transport Blower
T855 / T1055
OPERATOR’S MANUAL
Manual 2023 Rev C p/n 2023
Tuthill Vacuum & Blower Systems tuthillvacuumblower.com 800.825.6937
WARNING: Do Not Operate Before Reading Manual
Operator’s Manual: Tuthill T855/T1055 - Standard Weight Rotary Positive Displacement Transport Blower
Copyright © 2018 Tuthill Vacuum & Blower Systems
All rights reserved. Product information and specications subject to change.

Disclaimer Statement:
All information, illustrations and speci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 continous improvement policy. Thus, information, illustrations and/or speci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 me-
chanical, including photocopying, recording, taping or information storage and retrieval systems - without the
written permission of Tuthill Vacuum & Blower Systems.
Copyright © 2018 Tuthill Vacuum & Blower Systems
All rights reserved. Product information and specications subject to change.
The employees of Tuthill Vacuum & Blower Systems thank you for your purchase!
Tuthill Vacuum & Blower Systems proudly manufactures
Kinney®vacuum pumps and M-D PneumaticsTM blowers and
vacuum boosters in Springeld, Missouri, USA. We bring
100+ years of engineering experience and solid, hands-
on care to help customers keep their processes running.
Your satisfaction is important to us so please take time to
provide your Tuthill sales representative with performance
feedback. We love to hear from our customers!
Tuthill is a family owned business that was started by James
B. Tuthill in 1892. At that time, Tuthill manufactured com-
mon brick to Chicago construction companies who were
fueling the city’s rapid expansion. Fast forward to today
and Tuthill now serves sustaining, global markets like agri-
culture, chemical, construction, energy, food and beverage,
pharmaceuticals and medical, transportation, and utilities.
While the company has changed in what it manufactures,
one thing remains throughout every Tuthill line of business
– we are a company with HEART. Our slogan is “Pump Your
Heart Into It” and everyday our employees do just that as
they represent the Tuthill brand and dare to make better.
Thank you for making Tuthill Vacuum & Blower Systems
part of your company’s process! FIND OUT MORE AT
TUTHILL.COM
A company with heart
right from the start.

Operator’s Manual 2023 Rev C p/n 2023 i
Table of Contents
Table of Contents
Introduction .................................................................................. 1
Safety ............................................................................................ 2
Graphic Conventions in this Manual ..................................................... 2
Safety Instructions................................................................................. 3
Safety Precautions ..................................................................... 3
Installation .................................................................................... 5
Safety Checklist .................................................................................... 5
Specifications........................................................................................ 6
Outline Drawings................................................................................... 7
T855 / T1055 Vent Holes ....................................................................... 8
PTO Selection for Transmission............................................................. 9
Engine Speed ....................................................................................... 9
Pressure Relief Valve ............................................................................ 9
Air Filter ................................................................................................. 9
Suction and Discharge Piping .............................................................. 9
Mounting Bracket .................................................................................. 9
Check Valve .......................................................................................... 9
Mufflers and Discharge Filtration .......................................................... 9
Vacuum Valve...................................................................................... 10

Operator’s Manual 2023 Rev C p/n 2023
ii
Table of Contents
Performance Curves ........................................................................... 12
Performance Curves (US) ........................................................ 12
Performance Curves (Metric) ................................................... 16
Lubrication .......................................................................................... 20
Filling Procedure ...................................................................... 20
Operation .................................................................................... 22
Maintenance ............................................................................... 23
Regular Maintenance.......................................................................... 23
Blower Service & Repair ..................................................................... 23
Assembly Drawing and Parts List ............................................ 24
Assembly Drawing .............................................................................. 24
Parts List ............................................................................................. 25
Blower Installation Components ......................................................... 25

Operator’s Manual 2023 Rev C p/n 2023 1
CONGRATULATIONS on the purchase of a new
Tuthill Transport 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 monthly. Make sure covers are kept on all
openings. If the blower is stored outdoors, be sure
to protect it from weather and corrosion.
Tuthill Transport 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
identication on any replacement part
orders, or if service or application
assistance is required.
INTRODUCTION
01

Operator’s Manual 2023 Rev C p/n 2023
2
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.
Indicates a situation that can cause damage
to equipment, personal property, and/or
the environment or cause the equipment to
operate improperly.
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.
SAFETY
02

Operator’s Manual 2023 Rev C p/n 2023 3
02
Safety
WARNING
Hearing
Protection
Required
WARNING
Keep body and
clothing away from
machine openings.
CAUTION
Do not
touch hot
surfaces.
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.
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.
Safety Precautions
For equipment covered speci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.
• 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
• 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

Operator’s Manual 2023 Rev C p/n 2023
4
02
Safety
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 2023 Rev C p/n 2023 5
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 ratio and horsepower correct for PTO?
Mount PTO as per manufacturer’s
recommendations and re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 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 for safety of trailer?
Does engine maintain correct RPM throughout
test?
Shut down machine. Check Shur-Melt®plugs,
relief valve, lter, piping, and oil sumps for
integrity.
Is correct engine speed label visible in cab?
INSTALLATION
03

Operator’s Manual 2023 Rev C p/n 2023
6
03
Installation
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.
SPECIFICATIONS
MODEL AIR FLOW RANGE MAXIMUM
PRESSURE
MAXIMUM
VACUUM RPM RANGE
T855 250 – 1,000 CFM
(527 – 2,888 m³/h)
20 psig
(1.37 bar g)
17 inch-Hg
(575 Mbar) 1,000 – 3,000
T1055 450 – 1,300 CFM
(764 – 2,209 m³/h)
18 psig
(1.24 bar g)
17 inch-Hg
(575 Mbar) 1,450 – 3,000
OTE:NReduce 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 – Specifications

Operator’s Manual 2023 Rev C p/n 2023 7
03
Installation
OUTLINE DRAWINGS
Dimensions shown are not on a controlled
document and as such are subject to change.
Certied drawings are available through your local
Tuthill Transport Blower Distributor. Dimensions
are shown in inches and millimeters.
Figure 3-1 – Outline Drawings

Operator’s Manual 2023 Rev C p/n 2023
8
03
Installation
T855 / T1055 VENT HOLES
OTE:NDue to multiple bracket congurations
that are used by installers across the
country our T855 and T1055 blowers have
1/8" threaded NPT vent holes. Vent plugs
are not supplied with the blower.
If you choose to place plugs into vent holes to keep
foreign matter out of the units, you can purchase
HK 1/8-27 NPTF 7/8 Taper Flush Socket Pressure
Plug part # 1181142 from Fastenal or similar style
plugs from your local auto parts store. Another
option, depending on mounting bracket space, is
to use 90° elbows with or without exible tubing.
If you choose to use vent plugs, then follow the
subsequent instructions. The exact plug location
will vary based on the mounting position.
The image below shows one option for the vent
hole locations on a horizontal airow mount.
Figure 3-2 – Mounting Configuration
In this mounting conguration (See Figure 3-2)
the four holes (two are shown and two are on the
opposite side top) could have plugs added to them.
This would leave the four holes on the bottom of
the unit open or 90° 1/8" NPT elbows that face
down.
Four vent holes should always be open to air. You
can plug all the holes on the bracket side, then use
four 90° elbows on the non-bracket side (horizontal
mount). Or you can plug two on each end plate at
the top side and leave two on each end plate at the
bottom open.
CAUTION
!
Never plug all the vent holes or serious damage to
seals and bearings will result. Four vent holes (two
per side or all four on one side) must always be open.
Figure 3-3 – Alternate plug configuration: Horizontal
mount with holes plugged on the bracket side
Figure 3-4 – Alternate plug configuration: Horizontal
mount with street elbows

Operator’s Manual 2023 Rev C p/n 2023 9
03
Installation
PTO SELECTION FOR
TRANSMISSION
Blower speed and pressure require adequate
horsepower and torque. See Performance Curves
on page 12.
Engine speed and blower speed require the
adequate ratio PTO be installed for proper blower
operation.
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 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 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 lter suitable for the air ow requirement
of the application. Use air lters on food and plastic
products to prevent contamination.
An undersized air 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 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.
CHECK VALVE
Minimum restriction for application. Mount
downstream of the relief valve. Size the valve for
maximum air ow (CFM or m³/hr).
MUFFLERS AND DISCHARGE
FILTRATION
Minimum restriction for application. Mount
downstream of the relief valve.

Operator’s Manual 2023 Rev C p/n 2023
10
03
Installation
VACUUM VALVE
Size for proper air ow and vacuum rating.
This valve should be located before the blower
inlet lter. This valve is normally mounted on the
trailer.
To properly protect the blower from
overheating when vacuum loading, install a
vacuum valve.
RIGHT DRIVE CCW ROTATION LEFT DRIVE CW ROTATION
Figure 3-5 – Flow Direction and Rotation

Operator’s Manual 2023 Rev C p/n 2023 11
03
Installation
This page intentionally blank

Operator’s Manual 2023 Rev C p/n 2023
12
03
Installation
PERFORMANCE CURVES
PERFORMANCE CURVES (US)
T850 / T855 PRESSURE CURVE
2
5
8
12
15
18
20
PSIG
PSIG
20
18
15
12
8
5
2
1000 15002000
RPM
Airflow at Inlet (CFM)
2500 3000 0
25
200
300
400
500
600
700
800
900
1000
50
75
100
BHP
AIRFLOW BASED UPON INLET
CONDITIONS OF: 14.7 PSIA & 70° F
# PSIG DISCHARGE PRESSURE
Figure 3-6 – T850 / T855 Pressure Curve (US)

Operator’s Manual 2023 Rev C p/n 2023 13
03
Installation
T850 / T855 VACUUM CURVE
2
6
10
14
17
In. Hg
In. Hg
17
14
10
6
2
1000 1500 2000
RPM
2500 3000
Airflow at Inlet (CFM)
200
300
400
500
600
700
800
900
1000
0
25
50
75
100
BHP
AIRFLOW BASED UPON
INLET: 70° F
DISCHARGE: 29.92" Hg Abs
Figure 3-7 – T850 / T855 Vacuum Curve (US)

Operator’s Manual 2023 Rev C p/n 2023
14
03
Installation
T1050 / T1055 PRESSURE CURVE
2
5
8
10
12
15
18
PSIG
PSIG
18
15
12
10
8
5
2
10001500 2000
RPM
2500 3000
Airflow at Inlet (CFM)
0
150
300
450
600
750
900
1050
1200
1350
0
15
30
45
60
75
90
105
120
BH
P
AIRFLOW BASED UPON INLET
CONDITIONS OF: 14.7 PSIA & 70° F
# PSIG DISCHARGE PRESSURE
Figure 3-8 – T1050 / T1055 Pressure Curve (US)

Operator’s Manual 2023 Rev C p/n 2023 15
03
Installation
T1050 / T1055 VACUUM CURVE
In. Hg
17
16
12
10
8
5
2
2
5
8
10
12
16
17
In. Hg
1000 1500 2000
RPM
2500 3000
Airflow at Inlet (CFM)
0
150
300
450
600
750
900
1050
1200
1350
0
10
20
30
40
50
60
BHP
AIRFLOW BASED UPON
INLET: 70° F
DISCHARGE: 29.92" Hg Abs
Figure 3-9 – T1050 / T1055 Vacuum Curve (US)

Operator’s Manual 2023 Rev C p/n 2023
16
03
Installation
PERFORMANCE CURVES (METRIC)
Figure 3-10 – T850 / T855 Pressure Curve (Metric)