Minnich 1500 Series User manual

Electric Flex Shaft Vibrator
Operator/Service Manual
Hours of Operation
8:00AM to 4:30PM Mon. – Fri. Eastern Standard Time
277 North Main Street Phone: [phone]
PO Box 367 www.minnich-mfg.com Toll Free: 800.524.1033
Mansfield, OH 44902 e-mail: [email protected] Fax: [phone]
Form: LIT-012 Revised 7/1/2007

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TABLE OF CONTENTS
Section Page #
WARRANTY-------------------------------------------------------------------------------------------------------------3
GENERAL SAFETY RULES ----------------------------------------------------------------------------------------4
WORK AREA---------------------------------------------------------------------------------------------------5
ELECTRICAL SAFETY---------------------------------------------------------------------------------------5
PERSONAL SAFETY-----------------------------------------------------------------------------------------5
TOOL USE AND CAR----------------------------------------------------------------------------------------5
SERVICE --------------------------------------------------------------------------------------------------------5
GROUNDING INSTRUCTIONS-------------------------------------------------------------------------------------6
FUNCTIONAL DESCRIPTION--------------------------------------------------------------------------------------7
ASSEMBLY--------------------------------------------------------------------------------------------------------------8
OPERATION-------------------------------------------------------------------------------------------------------------9
MAINTENANCE ------------------------------------------------------------------------------------------------------10
PERIODIC MAINTENANCE SCHEDULE -------------------------------------------------------------10
MOTORS ------------------------------------------------------------------------------------------------------10
FLEXIBLE SHAFTS----------------------------------------------------------------------------------------- 11
VIBRATOR HEADS-----------------------------------------------------------------------------------------11
SERVICE ---------------------------------------------------------------------------------------------------------------12
ELECTRIC MOTORS--------------------------------------------------------------------------------------- 12
TO REPLACE BRUSHES ------------------------------------------------------------------------12
TO REPLACE FILTER ----------------------------------------------------------------------------12
TO REPLACE MOTOR SWITCH--------------------------------------------------------------- 13
TO REPLACE ELECTRIC CABLE -------------------------------------------------------------14
TO REPLACE ARMATURE AND FIELD------------------------------------------------------15
TO REPLACE BRUSH HOLDER--------------------------------------------------------------- 16
VIBRATOR HEADS-----------------------------------------------------------------------------------------17
TO DISASSEMBLE HEADS ---------------------------------------------------------------------17
TO DISASSEMBLE ECCENTRIC WEIGHT ASSEMBLY --------------------------------17
TO REPLACE OIL SEALS -----------------------------------------------------------------------17
TO ASSEMBLE ECCENTRIC WEIGHT ASSEMBLY -------------------------------------18
TO ASSEMBLE HEADS --------------------------------------------------------------------------18
PARTS AND SERVICE NOTES----------------------------------------------------------------------------------19
ELECTRIC MOTOR PARTS SHEET---------------------------------------------------------------------------- 20
VIBRATOR HEAD AND SHAFT PARTS SHEET------------------------------------------------------------ 21
SPECIFICATIONS
1500------------------------------------------------------------------------------------------------------------- 22
2500------------------------------------------------------------------------------------------------------------- 23
3500------------------------------------------------------------------------------------------------------------- 24
SERVICE SCHEDULE---------------------------------------------------------------------------------------------- 25

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MINNICH MANUFACTURING CO.
WARRANTY AND SERVICE AGREEMENT
Minnich Manufacturing Co. warrants to the original purchaser that, if any part of the product proves defective in material or
workmanship within one year from purchase, and is returned to Minnich Manufacturing Co. within 90 days after the defect
is discovered, Minnich Manufacturing Co. will at its option repair or replace said part. Product shipped to Minnich
Manufacturing Co. freight prepaid will be returned freight prepaid. Product shipped to Minnich Manufacturing Co. freight
collect will be returned freight collect.
LIMITATIONS:
Warranty does not apply to repairs that are required because of normal wear or tear, parts or products that are damaged
as a result of misuse, neglect, accident or fire, or of lightning, flooding or other acts of God, or by improper installation or
maintenance, of which Minnich Manufacturing Co. will be the sole judge. Warranty does not apply to parts or products
that have been modified by an unauthorized party that has in Minnich Manufacturing Co.’s judgment affected their
performance or reliability. Warranty does not apply if the part or product substantially fulfills the performance
specifications.
Minnich Manufacturing Co. shall not in any event be liable for the cost of any special, indirect, or consequential damages
as a result of this product.
SERVICE:
Out of warranty service is available through Minnich Manufacturing Co.

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GENERAL SAFETY RULES
This manual contains NOTES, CAUTIONS, and WARNINGS. These MUST be followed to
prevent the possibility of improper use, incorrect servicing, damaging the equipment, or
personal injury. Read and comply with all NOTES, CAUTIONS and WARNINGS included in
these instructions.
NOTE: Notes contain additional information important to the operation of
the equipment.
CAUTION: Cautions provide important information to prevent mistakes
that could result in damage to the equipment.
WARNING: Warnings alert one to practices or conditions that could
lead to personal injury or death!
WARNING
Read and understand all instructions.
Failure to follow all instructions listed below may result in one or all of the following;
electric shock, fire, and serious injury.
WARNING
DO NOT USE TOOL IF IT IS IN NEED OF SERVICE!
SAVE THESE INSTRUCTIONS

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- WORK AREA –
Keep your work area clean and well lit.
Cluttered and dark areas invite accidents.
DO NOT operate power tools in explosive atmospheres, such as, in the presence of flammable liquids, gases, or dust.
Power tools create sparks that may ignite the dust or fumes.
Keep bystanders, children, and visitors away while operating a power tool.
Distractions can cause you to lose control.
- ELECTRICAL SAFETY -
Grounded tools must be plugged into an outlet properly installed and grounded in accordance with all codes and ordinances.
Never remove the grounding prong or modify the plug in any way. DO NOT use any adapter plugs. Check with a qualified
electrician if you are in doubt as to whether the outlet is properly grounded.
If the tools should electrically malfunction or break down, grounding provides a low resistance path to carry electricity away
from the user.
Avoid body contact with grounded surfaces such as pipes, radiators, ranges and refrigerators.
There is an increased risk of electric shock if your body is grounded.
DO NOT expose power tools to rain or wet conditions.
Water entering a power tool will increase the risk of electric shock.
DO NOT abuse the cord. Never use the cord to carry the tools or pull the plug from an outlet. Keep cord away from heat, oil,
sharp edges, or moving parts. Replace damaged cords immediately.
Damaged cords increase the risk of electric shock.
When operating a power tool outside, use outdoor extension cords marked “W-A or “W”.
These cords are rated for outdoor use and reduce the risk of electric shock.
- PERSONAL SAFETY -
Stay alert, watch what you are doing and use common sense when operating a power tool. DO NOT use tool while tired or
under influence of drugs, alcohol or medication.
A moment of inattention while operating power tools may result in serious personal injury.
Dress properly. DO NOT wear loose clothing, or jewelry. Tie up long hair. Keep your hair, clothing, and gloves away from
moving parts.
Loose clothes, jewelry, or long hair can be caught in moving parts.
Avoid accidental starting. Be sure switch is off before plugging in.
Carrying tools with your finger on the switch or plugging in tools that have switches on invites accidents.
DO NOT overreach. Keep proper footing and balance at all times.
Proper footing and balance enables better control of the tool in unexpected situations.
Use safety equipment. Always wear eye protection.
Dust mask, non-skid safety shoes, hard hat, or hearing protection must be used for appropriate conditions.
- TOOL USE AND CARE -
DO NOT force tool. Use the correct tool for your application.
The correct tool will do the job better and safer at the rate for which it is designed.
DO NOT use tool if switch does not turn it on or off.
Any tool that cannot be controlled with the switch is dangerous and must be repaired.
Disconnect the plug from the power source before making any adjustments, changing accessories, or storing the tool.
Such preventive safety measures reduce the risk of starting the tool accidentally.
Store tools out of the reach of children and other untrained persons.
Tools are dangerous in the hands of untrained users.
Maintain tools with care. Keep tools clean.
Properly maintained tools are less likely to bind and are easier to control.
Check for misalignment or binding of moving parts, breakage of parts, and any other condition that may affect the tools
operation. If damaged, have the tool serviced before using.
Many accidents are caused by poorly maintained tools.
Use only accessories that are recommended by the manufacturer for your model.
Accessories that may be suitable for one tool may become hazardous when used on another tool.
- SERVICE -
Tool service must be performed only by qualified repair personnel.
Service or maintenance performed by unqualified personnel could result in a risk of injury.
When servicing a tool, use only identical replacement parts. Follow instructions in the maintenance section of this manual.
Use of unauthorized parts or failure to follow maintenance instructions may create a risk of injury.

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GROUNDING INSTRUCTIONS
The electric vibrator motors must be grounded while in use to protect the operator from electric shock. The vibrator
motors are equipped with a 3-conductor electric cord and a 3-prong grounding type plug to fit a properly grounded mating
receptacle.
115 VOLT
Models 1500 and 2500 are fitted with a 15amp NEMA Type 5-15P plug as shown in Fig. 1a. It is to be used in
conjunction with NEMA Type 5-15R grounded female receptacle as shown in Fig. 1b. Model 3500 is fitted with a 20amp
NEMA Type 5-20P plug as shown in Fig. 2a. It is to be used in conjunction with a NEMA Type 5-20R grounded female
receptacle as shown in Fig. 2b. It is also available with an optional 20amp NEMA Type L5-20P, as shown in Fig. 3a,
which is to be used in conjunction with a NEMA Type L5-20R grounded female receptacle as shown in Fig. 3b.
Fig. 1a Fig. 1b Fig. 2a Fig. 2b
Fig. 3a Fig. 3b

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FUNCTIONAL DESCRIPTION
The MINNICH line of Flex Shaft vibrators is a system of fully interchangeable components that fulfill the requirements of
any job.
The electric motors are available in three (3) sizes – 1500, 2500 and 3500 series all in 115 volts. They are designed to be
splash-proof as designated by the following symbol on the switch plate cover.
The flexible shafts are available in two (2) diameters - 7/8” and 1 3/16” and six (6) lengths – 2’, 5’, 7’, 10’, 14’ and 21’.
Couplings are available to join several lengths together.
The vibrating heads are available in six (6) sizes - 3/4”, 1”, 1 3/8”, 1 3/4”, 2” and 2 3/8” diameters.
RECOMMENDED MOTOR / SHAFT/ HEAD COMBINATIONS
MOTOR 1500 SERIES 2500 SERIES 3500 SERIES
SHAFT 2’, 5’, 7’ 2’, 5’, 7’, 10’, 14’, 21’ 2’, 5’, 7’, 10’, 14’, 21’
HEADS (DIA.) 3/4”
1”
1 3/8”
1 3/8”
1 3/4”
2”
2 3/8”
1 3/8”
1 3/4”
2”
2 3/8”
RECOMMENDED HEAD / SHAFT (CASING) COMBINATIONS
7/8” DIA. CASING 1 3/16” DIA. CASING
LENGTH HEAD SIZE LENGTH HEAD SIZE
2’
5’
7’
10’
3/4”, 1”, 1 3/8”, 1 3/4”
3/4”, 1”, 1 3/8”, 1 3/4”
3/4”, 1”, 1 3/8”, 1 3/4”
3/4”, 1”, 1 3/8”
2’
5’
7’
10’
14’
21’
1 3/8”, 1 3/4”, 2”, 2 3/8”
1 3/8”, 1 3/4”, 2”, 2 3/8”
1 3/8”, 1 3/4”, 2”, 2 3/8”
1 3/8”, 1 3/4”, 2”, 2 3/8”
1 3/8”, 1 3/4”, 2”, 2 3/8”
1 3/8”, 1 3/4”, 2”, 2 3/8”

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ASSEMBLY
CAUTION: Turn the switch off and unplug the motor before performing any maintenance or fitting any components to the
motor.
ASSEMBLING SHAFT TO MOTOR
1. The end of casing with the strain relief spring goes into the motor casing adapter.
2. Insert inner core of the shaft into the core adapter on motor. Make sure the core is fully inserted.
3. Coat threads on casing coupler with Permatex Form-A-Gasket #1.
4. Thread casing coupler counterclockwise into adapter on power unit and tighten securely using open end
wrenches on the flats. NOTE – These are Left-Hand Threads.
ASSEMBLING VIBRATOR HEAD TO SHAFT.
1. Coat threads on casing coupler with Permatex Form-A-Gasket #1.
2. Push core toward motor end to make certain it is still engaged in the motor. Insert exposed end of core into head
core adapter.
3. Holding casing coupler with an open end wrench on the flats, thread the head on counterclockwise and securely
tighten with a pipe wrench.
CAUTION: Put pipe wrench only on the very end of the head to which the flexible shaft is being attached.
LOOSEN
TIGHTEN

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OPERATION
Match vibrator motor, shaft and head assembly to the job. Select the shortest shaft possible to do the job to assure
maximum power at the head.
Avoid sharp bends in the flexible shaft for greatest efficiency and shaft life. This is true both in operation and storage. DO
NOT allow the flexible shaft to hang or be dragged over sharp edges of the forms during operation.
DO NOT use shaft or cord to pull motor.
To vibrate concrete, dip vibrating head vertically into the mix. Allow to vibrate until the surface around the head becomes
glossy and no large air bubbles break the surface – usually 10-20 seconds. Withdraw the head slowly, then move and
immerse vibrator head in new location.
CAUTION: Over – vibration will cause a separation of the aggregates and will weaken the concrete.
DO NOT operate the vibrating head out of the mix for more than two minutes to prevent overheating and permanent
damage to bearings and seals. Wet concrete keeps the head at safe operating temperature.
NOTE: A new head will run slightly warmer for a short time than a broken in head. Once the seals seat the temperature
of the head will drop.
The electric motors work in 115volt single phase current. They are universally wound and can be operated on either AC
or DC. The current must not exceed 60 cycles when operating on AC. 50 cycle AC current is acceptable.
DO NOT operate motors on voltages that vary more than 5% from the specified.
WARNING: Use only 3-conductor extension cords, that are equipped with 3-prong grounded plugs and 3-pole
receptacles that accept the tools plug.
Recommended AWG Wire Size For Extension Cords
Motor Rated Amps 25' [7.6m] 50' [15.3m] 100' [30.5m] 150' [45.8m] 200' [61.0m]
1500 9 18 14 12 10 8
2500 15 16 12 10 8 6
3500 20 14 12 8 6 6
Always use the proper size extension cord. Undersize cords will result in loss of power due to voltage drop.
WARNING: Running the motor on reduced voltage may result in burning up the motor.

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MAINTENANCE
CAUTION: Turn the switch off and unplug the motor before performing any maintenance or fitting any components to the
motor. When servicing use only identical replacement parts.
PERIODIC MAINTENANCE SCHEDULE
BEFORE OPERATING
1. Inspect air inlet filter and outlet vent holes. Clean or replace dirty or clogged filter.
2. Inspect electrical cords for undue wear or damage. Replace damaged cords. DO NOT use damaged cords.
EVERY 50 HOURS
Clean and lubricate the core in the flexible shaft.
EVERY 100 HOURS
1. Inspect commutator and brushes in motor.
2. Change oil in vibrator head.
MOTORS
Wipe off motor with damp rag after each use to prevent concrete build-up.
CAUTION: Never spray with or dip electric motor in water. This will increase the risk of electric shock.
Clean intake and exhaust areas to insure unrestricted air flow. Restricted air flow could cause motor to overheat.
Remove end cover over air filter and clean air filter element as often as required by working conditions. To clean filter,
remove and wash in warm, soapy water. Make sure filter is completely dry before reinstalling.
Check brushes periodically for wear. As a safety feature to protect the motor, the brushes are of such design that the
motor will shutdown if they wear and become too short. To avoid unnecessary arcing and an unexpected shutdown,
inspect the brushes every 100 hours and replace them when necessary. Always replace both brushes at the same time.
TO INSPECT OR REPLACE MOTOR BRUSHES:
1. Remove plastic brush housing covers and brush holder caps from both sides of the motor.
2. Pull out the brushes and measure the length of the graphite block portion of the brush. If the dimension is 3/8” or
less, replace with new brushes. If brushes are long enough, replace them in the same position in the motor to
avoid undue arcing.
3. Break in new brushes by running the motor less flexible shaft for about five (5) minutes or until the arcing stops.
Inspect commutator through access port in bottom of motor after every 100 hours of use. With motor running, check for
excessive arcing. If present, clean commutator with an industrially rated commutator cleaner which is available at most
motor repair establishments.