Blastrac 1-8DEZMKII User manual

MODEL
1-8DEZMKII
Shot Blasting System
WALK BEHIND MANUAL PUSH
Trust the Original Surface Preparation Experts
800.256.3440 blastrac.com

FORWARD
Blastrac is pleased that you have selected this Blast Cleaning System for your
surface preparation requirements. This environmentally safe, closed-cycle,
surface preparation machine has been designed and built for abrasive blast
cleaning of horizontal surfaces.
This manual has been prepared to assist the operator and the maintenance
personnel in understanding the machine so that it may be operated in the most
efficient manner and maintained in the best condition. Therefore, it is necessary
that all personnel responsible for the operation and maintenance of the machine
read the manual thoroughly. By following the instructions in this manual, this
system can be easily and effectively operated, serviced and maintained by
personnel assisted by a brief period of familiarization and training from a
Blastrac technician.
Before attempting to operate, service, or maintain the machine, the personnel
should thoroughly familiarize themselves with the physical makeup of the
machine, be familiar with the major systems of the machine, and have an
understanding of its operation.
The operating and maintenance personnel must obey all the warnings and safety
precautions posted on the side of the machine and stated throughout this
manual. Serious injury to personnel or severe damage to the equipment may
result if the warnings and precautions are not followed, or through careless
handling of this equipment.
Initial operation and maintenance must be done cautiously. Extreme care should
be taken when activating any control devices until the response of the machine
and its various components are clearly understood.
If you have any questions or problems in regard to the operation or capabilities of
this Blastrac machine, please contact:
Blastrac
13201 North Santa Fe
Oklahoma City, OK 73114
405/478-3440
800/256-3440
or your nearest Service Center.

INTRODUCTION
This manual has been prepared to assist the operator and maintenance
personnel in understanding the machine so that it may be operated in the safest
and most efficient manner and maintained in the best condition. Therefore, it is
necessary that all personnel responsible for the operation and maintenance of
the machine read and understand the manual.
Before attempting to operate service or maintain the machine, the personnel
should thoroughly familiarize themselves with the physical make-up of the
machine. They should be familiar with the major components of the machine and
have a general understanding of overall operations.
The operating and maintenance personnel must obey all the warnings and safety
precautions posted on the machine and stated throughout this manual. Serious
injury to personnel or severe damage to the equipment may result if the warnings
and precautions are not followed.
You will be notified of any changes that occur after this manual is printed. We
will send you manual revisions that should be inserted in the manual in
accordance with instructions that will be forwarded with them.
Receipt of Machine
Examine the shipment carefully for possible damage that might have occurred
while in transit. If any damage is noted, notify the transportation carrier
immediately and advise Blastrac.

Operating Instructions 1-8DEZ
Table of Contents
Page Number
Safety Precautions
1
1.1 Safety Instructions
2
1.2 Mechanical
3
1.3 Ventilation
5
Operator Responsibilities
6
2.1 Operator Responsibilities
7
Description and Function
8
3.1 Blast Unit –General
9
3.2 Blast Unit –Abrasive Cleaning Head
9
3.3 Blast Unit –Abrasive Control Valve
10
3.4 Blast Unit –Rebound Chamber (Plenum)
10
3.5 Blast Unit –Deflector Plate / Hopper
11
3.6 Blast Unit –Abrasive Seals
11
3.7 Blast Unit –Chassis
11
3.8 Cleaning Media (Abrasive)
12
Figure #1
13
Figure #2
14
Figure #3
15
Start-Up Procedures and Precautions
16
4.1 Start-Up Procedures
17
4.2 Blast Cleaning
18
4.3 Shut Down
19
Setting the Correct Blast Pattern
20
5.1 Setting the Correct Blast Pattern
21
Edging Mode
23
6.1 Changing the Edging Mode
24
Figure #4 25
Equipment Calibration
26
7.1 Equipment Calibration
27
Wear Parts
28
8.1 Wear Parts
29
8.2 Maintenance Log
30

Operating Instructions 1-8DEZ
Table of Contents
Blast Wheel Replacement
31
9.1 Blast Wheel Replacement
32
Troubleshooting
34
10.1 Troubleshooting
35
10.2 Ventilation System (4-54SP Dust Collector)
37
10.3 Vacuum Adjustment
37
Specifications
38
11.1 Blast Unit
39
Recommended Spare Parts 40
12.1 Recommended Spare Parts List 41
Reference Drawings
General Assembly 421-0001

Operating Instructions 1-8DEZ
Safety Precautions
1
Section 1
1.1 Safety Instructions
1.2 Safety – Mechanical
1.3 Safety - Ventilation

Operating Instructions 1-8DEZ
Safety Precautions
2
WARNING: ALL OPERATORS AND MAINTENANCE PERSONNEL SHOULD READ
AND UNDERSTAND ALL OF THE OPERATING INSTRUCTIONS PRIOR TO
OPERATING OR MAINTAINING ON THE 1-8DEZ.
These Blastracoperating instructions have been specifically prepared for operating
and maintenance personnel working with the Model 1-8DEZ shot-blasting system. The
information in this manual is intended to provide an understanding of the 1-8DEZ to
minimize safety risks and maximize 1-8DEZ performance.
1.1 Safety Instructions
All operating and maintenance personnel must observe all warnings and precautions
that are listed in this manual for the Model 1-8DEZ. All safety and warning labels
posted on the 1-8DEZ and the instructions included in these operating instructions must
be followed.
This Blastrac®1-8DEZ has been manufactured for specific floor preparation
applications. The engineering design of this airless media blast machine incorporates
several basic elements. These include the airless media blast wheel, the media
recycling system and the dust collection system. As a result of many years of operating
and engineering experience, the features of these machines when used with the proper
operating and maintenance procedures enable them to operate in an efficient and
trouble-free manner.
A thorough understanding of your 1-8DEZ will help ensure that it can be operated
efficiently and with minimized safety risks. No instructions, written or verbal, can be
effective without the use of sound judgment and good work practices in the operation
and maintenance of the 1-8DEZ. The U.S. Department of Labor Occupational Safety &
Health Administration (OSHA) provides standards and regulations relating to the use of
portable tools on construction sites. The operator of this 1-8DEZ should be familiar with,
and understand these Regulations and Standards. These Standards and Regulations
are posted on the OSHA Website at www.osha.gov.
CAUTION: Always keep the abrasive valve control lever in the
off/closed position except when the 1-8DEZ is actually blast
cleaning. Immediately close the abrasive control valve by
releasing the handle- mounted shot valve control if you
experience any irregular or hazardous situations while operating
or maintaining the 1-8DEZ. Unusual situations include, but are
not limited to, loud noise and excessive vibration.

Operating Instructions 1-8DEZ
Safety Precautions
3
1.1 Cont’d
Before actual shotblasting can begin, the operator should be certain that the 1-8DEZ
will clear all obstructions in the work area. Work areas must be dry and clean (no loose
debris) before cleaning can begin.
WARNING: INTRODUCTION OF LOOSE DEBRIS MAY CAUSE A CATASTROPHIC
FAILURE RESULTING IN SERIOUS INJURY.
WARNING: KEEP ALL GUARDS IN PLACE - THE 1-8DEZ IS EQUIPPED WITH
GUARDS OR COVERINGS FOR PARTS THAT MAY BE HAZARDOUS. IF ANY
GUARDS ARE REMOVED FOR MAINTENANCE, VERIFY THAT THE GUARDS HAVE
BEEN REPLACED AND ARE FUNCTIONING PRIOR TO USING THE 1-8DEZ.
REFER TO DRAWINGS 421-0001 FOR CORRECT PLACEMENT OF GUARDS,
COVERINGS AND OTHER 1-8DEZ COMPONENT PARTS.
All personnel in the immediate work area must wear safety glasses with side shields
whenever the 1-8DEZ is blasting. Protective clothing is also recommended. Long
sleeve shirts and safety shoes should be worn. The abrasive used in the 1-8DEZ
impacts the work surface at high velocity; therefore any leakage during normal
operation may sting personnel in the surrounding area. The blast head must be sealed
to the work surface during operation to prevent abrasive leakage. Loose clothing, long
hair and jewelry should not be worn when operating or maintaining the 1-8DEZ.
1.2 Safety – Mechanical
Maintenance Mode
Maintenance mode is defined as the state or condition of the 1-8DEZ, which minimizes
mechanical and electrical hazards.
The 1-8DEZ should be put into maintenance mode prior to making adjustments or
attempting any maintenance. The steps for placing the 1-8DEZ in maintenance mode
are listed below.
1. Move 1-8DEZ to level ground.
2. Verify all moving parts have stopped.
3. Turn off main power at electrical box located on steering handle.
4. Release grinder power trigger by simultaneously pressing the grinder power
trigger and unlock button located on the back of the grinder.
5. Utilize Lock-Out/Tag-Out procedures on main power on/off switch on the
electrical box located on the steering handle.

Operating Instructions 1-8DEZ
Safety Precautions
4
1.2 Cont’d
Most industrial and many commercial work sites will have already developed their own
Lock-Out/Tag-out procedures. The site safety personnel should be contacted to
establish the procedure to be used. If the site has no formal Lockout/Tag out procedure
the operator of this 1-8DEZ should be prepared to implement their own procedure
including training of all operating and maintenance personnel.
All drive guards must be kept in place and in good condition except during maintenance
or when repair work is being performed. Once maintenance or repair work is complete,
be sure all guards are securely remounted and operating.
Safety glasses with side shields should always be worn when working with or near the
1-8DEZ while in use.
Loose fitting clothing and gloves should not be worn when working with the 1-8DEZ.
Gloves can be worn for added protection.
The 1-8DEZ and all areas around the 1-8DEZ should be kept clean. Loose media in
particular can become hazardous for foot traffic. All abrasive leaks should be repaired
immediately to help keep the work area free of loose abrasive.
Any condition(s) that may result in damage to the 1-8DEZ or cause injury to the
operator and/or other personnel should be repaired immediately.
Do not attempt to make adjustments to the feed spout or any control cage components
while the 1-8DEZ is in motion or the blast wheel is operating. All adjustments must be
made after the 1-8DEZ as been put in Maintenance Mode.
Obey all safety and danger signs posted on the 1-8DEZ, read and understand the
Operating Instructions thoroughly, and follow all information posted where the 1-8DEZ
is being operated.
CAUTION: ALL SAFETY AND WARNING STICKERS MUST BE KEPT IN GOOD,
READABLE CONDITION. SEE DRAWING NUMBER 421-0013 FOR STICKER
DESCRIPTIONS AND LOCATIONS.
Do not operate the 1-8DEZ in the rain or when heavy moisture is present. Do not
expose the abrasive supply to any type of moisture. Sticky, tar related and rubber
surfaces should be avoided when using the Blastrac®1-8DEZ. Always drain unused
abrasive from the 1-8DEZ and empty the dust collector hopper before transporting the
1-8DEZ.

Operating Instructions 1-8DEZ
Safety Precautions
5
1.3 Ventilation
The 1-8DEZ will not operate correctly without a dust collector.
The dust collector aids in the recovery of the abrasive and removes potentially
hazardous dust from the air stream. If the machine is leaving shot on the ground or
emitting dust, make sure your dust collector is operating correctly. Moreover, the dust
collector helps maintain cleaning efficiency and minimizes the wear of the 1-8DEZ
component parts.
All abrasive blast equipment must be properly ventilated to be environmentally effective.
This benefits the operator, helps maintain efficiency and minimizes wear.
Keep the dust collector filters as clean as possible and dispose of the dust regularly and
safely. Follow all environmental regulations when disposing of the dust. Many types of
dust have chemical and physical properties that can cause fire or explosion. These
hazards are minimized when the dust is removed on a regular basis as recommended.
Be sure to obtain any MSDS that may pertain to the specific use of the 1-8DEZ. Always
be aware that the dust generated may require the operator to wear the appropriate
breathing apparatus according to the recommendations of the MSDS.
WARNING: AVOID INHALING AIR CONTAMINATED WITH CONCRETE DUST.
SHOT BLASTING CONCRETE PRODUCES CONCRETE DUST THAT CONTAINS
AIRBORNE CRYSTALLINE SILICA. NEVER OPERATE THE 1-8DEZ WITHOUT AN
APPROPRIATE DUST COLLECTOR. MOREOVER, AIRBORN SILICA COULD STILL
EXIST EVEN WITH THE USE OF A DUST COLLECTOR IF THE DUST COLLECTOR
IS NOT OPERATING CORRECTLY. OBSERVE ALL APPLICABLE LOCAL, STATE
AND FEDERAL SAFETY REGULATIONS. FOLLOW OSHA APPROVED
RESPIRATORY PROTECTION STANDARDS (REFERENCE OSHA 29CFR 1910.134-
RESPIRATORY PROTECTION, 1910.1000-AIR CONTAMINANTS, AND ALL
SUBSEQUENT ADDITIONS OR MODIFICATIONS). THE USE OF THE
APPROPRIATE RESPIRATORY PROTECTION IS ESPECIALLY IMPORTANT WHEN
EXPOSED TO THE INTERNAL COMPONENTS OF THE DUST COLLECTOR WHEN
CONCRETE DUST IS PRESENT, IN ADDITION TO NORMAL SHOT BLASTING.
IHALATION OF AIRBORN SILICA CAN CAUSE SILICOSIS AND DEATH.

Operating Instructions 1-8DEZ
Owner/Operator Responsibilities
6
Section 2
2.1 Owner/Operator Responsibilities

Operating Instructions 1-8DEZ
Owner/Operator Responsibilities
7
2.1 Owner/Operator Responsibilities
1. The owner/operator shall be responsible for the observance of all safety precautions
expressed in this manual.
2. The owner/operator shall be trained by a Blastrac®Technician for the operation and
maintenance of Blastrac equipment.
3. The owner/operator shall provide the necessary blasting media in accordance with the
recommendations of a Blastrac technician so that the 1-8DEZ will operate at maximum
efficiency.
4. The owner/operator shall perform all maintenance and basic repair functions as stated
and described in this manual.
5. The owner/operator shall maintain an inventory of wear parts as outlined in this manual.
6. The owner/operator shall dispose of all dust collector refuse.
7. The owner/operator shall provide the following tools and accessories:
Hammer
Screwdrivers
Metric Wrench Set
U. S. Wrench Set
Utility Knife
Metric Hex Key Set
5/16” Allen Wrench
Magnetic Broom
Buckets
Imperial Hex Key Set

Operating Instructions 1-8DEZ
Description and Function
8
Section 3
3.1 Blast Unit –General
3.2 Blast Unit –Abrasive Cleaning Head
3.3 Blast Unit –Abrasive Control Valve
3.4 Blast Unit –Rebound Chamber (Plenum)
3.5 Blast Unit –Deflector Plate / Hopper
3.6 Blast Unit –Abrasive Seals
3.7 Blast Unit –Chassis
3.8 Cleaning Media (Abrasive)

Operating Instructions 1-8DEZ
Description and Function
9
3.1 Blast Unit –General
The Blastrac®equipment series described herein includes the 1-8DEZ Blast Unit. This
model is used in conjunction with the Turbo Vacuum Dust Collector. Each combination
comprises a horizontal surface preparation, closed cycle, shotblasting system. The
blast unit directs high velocity, metallic abrasive toward the work surface. The impact of
each individual particle causes the surface to fracture and become loose. The abrasive
and the loose surface particles are then directed upward due to the force of the impact
and a strong airflow created by the dust collector. The mixture of shot and contaminants
enters the rebound plenum and continues its upward movement until directed into a
specially designed chamber called the separator. Inside this chamber, an air wash
cleans the abrasive and allows the contaminants to be extracted back to the dust
collector. The clean abrasive is then gravity fed to the blast wheel and the process
repeats. The blast unit is manually propelled. Please refer to section 1.3 ventilation.
The blast units consist of the following elements:
Abrasive Cleaning Head
Abrasive Control Valve
Rebound Chamber
Deflector Plate / Hopper
Abrasive Seals
Chassis
Ventilation System
Cleaning Media (Abrasive)
3.2 Blast Unit –Abrasive Cleaning Head
This section (3.2) refers to Figure Number 1 on page 13.
The center of the patented abrasive cleaning head is the four bladed, six-inch blast
wheel that accelerates the abrasive towards the surface being cleaned. This center fed
blast wheel propels the abrasive by centrifugal force at a speed of more than 200 mph.
This blast wheel is enclosed in an abrasion resistant housing that is also lined with
abrasion resistant liners. These liners are located in areas where the most wear is
present. The operator must change them periodically to protect the housing. The blast
wheel is directly connected to an 8,000 RPM, 110V angle grinder.

Operating Instructions 1-8DEZ
Description and Function
10
3.2 Cont’d
The blast wheel is equipped with a cast in place impeller for easy maintenance. This
impeller pre-accelerates the abrasive to the wheel blades in controlled portions. The
impeller also acts as a timing device to ensure proper placement of abrasive on the
blade face. Abrasive that is gravity fed to the center of the wheel is pre-accelerated by
impeller segments and directed through the control cage. The control cage determines
where the abrasive is introduced onto the rotating blades of the wheel which in turn
determines where the abrasive is being “aimed”. The setting of the control cage is very
important when setting up the “blast pattern.” Refer to Section 5 for setting the correct
blast pattern.
3.3 Blast Unit –Abrasive Control Valve
This section (3.3) refers to Figure Number 2 on page 14.
The abrasive control valve regulates the amount of abrasive delivered to the blast
wheel. The main component of this device is a butterfly valve surrounded by a
magnetic strip. A slight gap exists between the disk on the butterfly assembly and the
inner wall of the valve. When the disk is horizontal, the magnetic strip provides a seal
that closes the gap with steel shot and stops the flow of abrasive. The valve is
manually operated with the actuator below the handle. Should the abrasive valve need
to be replaced, the lever arm should be oriented at approximately 45 degrees when the
valve is closed (see figure #2) after inserting the new valve.
3.4 Blast Unit –Rebound Chamber (Plenum)
Once the abrasive has impacted the work surface, the shot is directed into the rebound
plenum. This curved portion of the plenum absorbs a large percentage of the force
exerted by the high velocity abrasive and helps dissipate the heat generated by the
blast process.

Operating Instructions 1-8DEZ
Description and Function
11
3.5 Blast Unit –Deflector Plate / Hopper
This section (3.5) refers to Figure Number 3 on page 15.
Once the contaminated abrasive leaves the rebound plenum, it enters the separator
and immediately encounters the deflector plate. The deflector plate slows the abrasive
down even more before it enters a tray at the bottom of the deflector plate. The
contaminated abrasive hits the abrasive already at the bottom of the plate and
effectively absorbs any residual force left in the moving mixture. The contaminated
abrasive then falls through a curtain of high velocity clean air, which physically
separates the heavy abrasive and the lighter contaminants. The air wash pulls the
contaminants through the separator towards the exhaust and eventually to the dust
collector. The clean abrasive falls to the bottom of the separator, then into a hopper
where it can be recycled.
3.6 Blast Unit –Abrasive Seals
This section (3.6) refers to Figure Number 4 on page 25.
Magnetic abrasive seals are present on all sides of the rectangular opening at the
bottom of the blast housing. These magnets should be charged with a load of abrasive
before the blasting process begins. During the blasting process, they will attract any
loose abrasive onto their surface, thus providing a “seal” to help contain the high impact
abrasive from escaping the blast chamber. The leading and trailing edges of the blast
chamber are equipped with additional brush seals mounted on the outside of the
magnetic seals. The brush seals drag across the work surface allowing clean air to be
drawn inside the 1-8DEZ. The air draw aids in the cooling and the reclaiming process.
3.7 Blast Unit –Chassis
All components on the blast unit are mounted on a mobile transporter. This transporter,
or carriage, is a two-wheeled hand propelled unit. A two-wheeled caster kit is installed
in front of the rebound plenum for additional stability.
The operator’s handle is rigidly connected to the chassis and may be pushed down to
allow the operator to lift the blast seal over small obstructions. For safety reasons, we
recommend that the bottom of the front urethane seal not be lifted more than
approximately 1/8“ off the surface being cleaned. Lifting the seal edge beyond this may
allow high velocity abrasive to escape the blast chamber.

Operating Instructions 1-8DEZ
Description and Function
12
3.8 Cleaning Media (Abrasive)
Blastrac provides a variety of specially sized, high quality abrasive for Blastrac shot
cleaning systems. This steel abrasive is made of high quality martensitic steel to
provide long operating life and minimal abrasive breakdown.
The 1-8DEZ is designed to operate with abrasive in sizes S-110 through S-330. The
selection of proper abrasive is very important to the performance of the Blastrac shot
cleaning system. Your Blastrac representative can help with the proper selection of
abrasive for your particular application.
The steel abrasive causes minimum wear on the internal blast components. The dust
and contaminants are the principal causes of component wear. A well-maintained
ventilation system will minimize abrasive contamination, which helps reduce operating
costs and increases the overall efficiency of the shotblasting system.

Operating Instructions 1-8DEZ
Description and Function
13
A A
GRINDER ADAPTER
PLATE
POLYURETHANE
SEAL
CONTROL
CAGE
FEED
SPOUT
FEED SPOUT/
CONTROL CAGE
CLAMP
BLAST WHEEL
DRIVE HUB
ARBOR NUT
ABRASIVE CLEANING HEAD
FIGURE #1

Operating Instructions 1-8DEZ
Description and Function
14
CABLE ANCHOR
SPRING
HOPPER
FEED SPOUT
LEVER
CONTROL CABLE
PIVOT
ABRASIVE CONTROL
VALVE
A A AA
45°
CLOSED OPEN
135°
OPEN
CLOSED
90°
ABRASIVE CONTROL VALVE
FIGURE #2

Operating Instructions 1-8DEZ
Description and Function
15
REBOUND PLENUM
CLAMP
SCREEN
AIR OUTLET
HINGE
ABRASIVE VALVE
ABRASIVE VALVE
ANCHOR
STORAGE HOPPER
SLOT
VACUUM
ABRASIVE/
CONTAMINANTS
IN AIR
VACUUM
DEFLECTOR
LID ASSEMBLY
SEPARATOR 1-8DEZ
FIGURE #3