Minnich A-3 User manual

Form: MM-A3/A5 Revised 9/8/14
- 1 -
A-3/A-5 Dowel Drill
Operator/Service Manual
1444 St Rt 42 Phone: [phone]
www.minnich-mfg.com Toll Free: 800.524.1033
Mansfield, OH 44903 e-mail: [e-mail] Fax: [phone]

Form: MM-A3/A5 Revised 9/8/14
- 2 -
TABLE OF CONTENTS
Section Page #
WARRANTY ------------------------------------------------------------------------------------------------------- 3
GENERAL SPECIFICATIONS-------------------------------------------------------------------------------- 4
GENERAL SAFETY RULES---------------------------------------------------------------------------------- 6
WORK AREA--------------------------------------------------------------------------------------------- 7
PERSONAL SAFETY----------------------------------------------------------------------------------- 7
TOOL USE AND CARE-------------------------------------------------------------------------------- 7
SERVICE -------------------------------------------------------------------------------------------------- 8
SAFETY DECAL PLACEMENT------------------------------------------------------------------------------ 9
DRILL STEEL AND BITS-------------------------------------------------------------------------------------11
WARRANTY ---------------------------------------------------------------------------------------------11
GENERAL NOTES-------------------------------------------------------------------------------------11
DRILL STEEL AND BITS IN STOCK--------------------------------------------------------------12
USAGE CALCULATION------------------------------------------------------------------------------13
BIT INSTALLATION AND REMOVAL-------------------------------------------------------------13
SET-UP PROCEDURE ----------------------------------------------------------------------------------------14
RECOMMENDED LUBRICANTS---------------------------------------------------------------------------14
TROUBLE SHOOTING ----------------------------------------------------------------------------------------15
CYLINDER SERVICE KITS ----------------------------------------------------------------------------------17
PARTS BREAKDOWNS
PLUMBING DRAWING A11593-00003-A--------------------------------------------------------18
PLUMBING DRAWING A11593-00003-B--------------------------------------------------------19
DRILL SUPPORT ASSEMBLY 0A9776-00019-------------------------------------------------20
RAIL ASSEMBLY A11744-00028------------------------------------------------------------------21
VALVE 010925-00000---------------------------------------------------------------------------------22
VALVE 011549-00000---------------------------------------------------------------------------------23
PRESSURE REGULATOR 002880-00000------------------------------------------------------24
PRESSURE REGULATOR 011703-00000------------------------------------------------------25
FILTER – IN-LINE 004955-00000------------------------------------------------------------------26
LUBRICATOR 003843-00000-----------------------------------------------------------------------27
LUBRICATOR 003843-00001-----------------------------------------------------------------------29
SKID STEER MOUNT ASSEMBLY A11828-00000-------------------------------------------31
BACKHOE MOUNT ASSEMBLY A11828-00001----------------------------------------------32
BACKHOE MOUNT ASSEMBLY A11828-00004----------------------------------------------33
SPINDLE ASSEMBLY 0A4495-00001------------------------------------------------------------34
MAIN DRILL FRAME ASSEMBLY-----------------------------------------------------------------35
MAIN DRILL FRAM ASSEMBLY WITH SIDE SHIFT-----------------------------------------36
SKID STEER – SIDE SHIFT MOUNT A11933-00000----------------------------------------37
50 LB (23 kg) ROCK DRILL 0A9350-00000-----------------------------------------------------38

Form: MM-A3/A5 Revised 9/8/14
- 3 -
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 90 days 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.

Form: MM-A3/A5 Revised 9/8/14
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A3/A5
Mounted Air Drill
Specifications shown are standard.
Variations to the standard are available.
*Based on 2 piece steel and bits.
Whirlybits should be 1” (2.5cm) longer for maximum drilling
depth.
Model
A-3/A-5
Drill Steel Shank
.875” x 4.25”
(22.2mm x 107.9mm)
Drill Steel Length U.C.
24” (61.0cm)
Drill Bit Diameter
.625” – 2.50”
(15.9mm to 63.5mm)
*Maximum Drill Depth
18” (45.7cm)
Drill Distance
From Top of Slab
3” – 12”
(7.6cm to 30.5cm)
Minimum Cutout Width
48” (121.9cm)
Weight A-3
1500lbs. (680.4kg)
Weight A-5
2000lbs. (907.2kg)
Rotation
180 RPM
Air Requirements
SCFM Required Per Drill
92.2 (2.61 m³/min)
PSIG Required
90 (6.2 BAR)
Side shift is optional
330 degree drill bed rotation
Includes oil cooler
Adjustable drill height, depth and centers
Includes valving for most equipment with auxiliary circuit
Backhoe or skid loader mounted
Dust collection is available
Hydraulic Power Rotation optional
Wireless Control optional

Form: MM-A3/A5 Revised 9/8/14
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GENERAL SPECIFICATIONS CONT
Pneumatic Connection:
•An approved air disconnect is required to be installed in accordance to all Local and National
Codes.
Environmental:
•+5°C to +40°C (+41°F to +104°F)
•50% Rh at +40°C (+104°F), (90% Rh at +20°C (+68°F))
•Altitude – 1000m (3280ft) above mean sea level
•Unit is to be disposed according to all Local and National Regulations
Transportation and Storage:
•-25°C to +55°C for 24 hours (-13°F to +131°F)
Ingress Protection:
•Protection level IP2X is provided
Sound:
•System operates at sound levels about 85dBA and 85dBC. Hearing protection is required.
System Nameplate:

Form: MM-A3/A5 Revised 9/8/14
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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 serious injury.
WARNING
DO NOT USE TOOL IF IT IS IN NEED OF SERVICE!
SAVE THESE INSTRUCTIONS

Form: MM-A3/A5 Revised 9/8/14
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- WORK AREA –
Keep your work area clean and well lit.
Cluttered and dark areas invite accidents.
Keep bystanders, children, and visitors away while operating a power tool.
Distractions can cause you to lose control.
- 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 connecting.
Connecting 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 and hearing protection.
Dust mask, non-skid safety shoes, hard hat, or hearing protection must be used for appropriate conditions.
Prolonged exposure to loud noise can cause impairment or loss of hearing. Wear suitable hearing protection
device such as earmuffs or earplugs.
Keep a first-aid kit near the power tool.
Safety depends on you.
- TOOL USE AND CARE -
Only qualified persons should operate the power tool.
Make sure you operate and service your power tool correctly.
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 tool 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.

Form: MM-A3/A5 Revised 9/8/14
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– SERVICE –
DO NOT run the drill unit while you make adjustments and repairs unless the procedure is approved.
Escaping fluid and air under pressure can have sufficient force to penetrate the skin causing serious personal
injury.
If injured by escaping fluid or air, see a doctor at once. Serious infection or reaction can develop if proper medical
treatment is not administered immediately.
Before disconnecting lines, be sure to relieve all pressure. Before applying pressure to the system, be sure all
connections are tight and that lines, tubes and hoses are not damaged.
DO NOT use your hand to search for leaks.
Use a piece of cardboard or wood to search for suspected leaks.
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.
Use of unauthorized parts or failure to follow maintenance instructions may create a risk of injury.

Form: MM-A3/A5 Revised 9/8/14
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A-3/A-5 Safety Decal Placement
(A11395-00001)
012287-00008
012287-00003
012287-00002

Form: MM-A3/A5 Revised 9/8/14
- 10 -
A-3/A-5 Safety Decal Placement Cont.
Drill Steel and Bits
012287-00007
012287-00005
012287-00006

Form: MM-A3/A5 Revised 9/8/14
- 11 -
Warranty Policy
All drill steel and bits sold to customer are intended for use in drilling concrete. It is not
capable of drilling through steel mesh, rebar or dowel bars. Use in these applications
will void all warranties and dramatically shorten bit life. Bit life is also affected by the
sharpness of the bit, type of aggregate and condition of concrete. Minnich
Manufacturing’s drill steel and bit warranty is limited to the warranty provided by the
supplier. All warranty claims must be submitted to Minnich for evaluation and sent to
the supplier for authorization.
General Notes
1. 2” (50.8mm) diameter maximum bit for hydraulic drills.
2. 2 1/2” (63.5mm) diameter maximum bit for pneumatic drills.
3. 5/8” (16mm) diameter is the smallest hole diameter.
4. Cutting speed varies from 15 to 30 seconds for a 6” (152.4mm) deep hole,
depending on bit diameter and aggregate.
5. On average you can get 180 holes, 9” (228.6mm) deep per bit.
6. On average you can get 600 holes, 9” (228.6mm) deep per drill steel.
7. Removable bits are carbide and cannot be re-sharpened.
8. Whirly bit steel can be re-sharpened twice.

Form: MM-A3/A5 Revised 9/8/14
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Drill Steel & Bits In-Stock
1 Piece Steel & Bit (Whirly Bit)
Part Number
Hole Diameter
Shank Size
UC Length
005367-12.00
5/8" (15.9mm)
7/8" x 4 1/4" (22.2mm x 107.9mm)
12" (30.5cm)
005367-24.00
5/8" (15.9mm)
7/8" x 4 1/4" (22.2mm x 107.9mm)
24" (61.0cm)
004209-12.00
3/4" (19.1mm)
7/8" x 4 1/4" (22.2mm x 107.9mm)
12" (30.5cm)
004209-24.00
3/4" (19.1mm)
7/8" x 4 1/4" (22.2mm x 107.9mm)
24" (61.0cm)
004541-12.00
7/8" (22.2mm)
7/8" x 4 1/4" (22.2mm x 107.9mm)
12" (30.5cm)
004541-24.00
7/8" (22.2mm)
7/8" x 4 1/4" (22.2mm x 107.9mm)
24" (61.0cm)
004745-12.00
1" (25.4mm)
7/8" x 4 1/4" (22.2mm x 107.9mm)
12" (30.5cm)
004745-24.00
1" (25.4mm)
7/8" x 4 1/4" (22.2mm x 107.9mm)
24" (61.0cm)
All 4 1/4” (107.9mm) shanks can be cut to a 3 1/4” (82.55mm) shanks
Tapered Steel
Part Number
Shank Size
UC Length
Notes
003749-12.00
7/8" x 4 1/4" (22.2mm x 107.9mm)
12" (30.5cm)
For 1” (2.54cm) Bits ONLY
003747-1.000
003749-24.00
7/8" x 4 1/4" (22.2mm x 107.9mm)
24" (61.0cm)
004116-12.00
7/8" x 4 1/4" (22.2mm x 107.9mm)
12" (30.5cm)
For 1 1/8” (2.86cm) &
Larger Bits ONLY
004116-24.00
7/8" x 4 1/4" (22.2mm x 107.9mm)
24" (61.0cm)
Tapered Bits
Part Number
Hole Diameter
Shim Part Number
Notes
003747-1.000 1" (2.54cm) 003839-00000
Use 003749-12.00 or
003749-24.00 Steel ONLY
003747-1.120
1 1/8" (2.86cm)
003901-00000
Use 004116-12.00 or
004116-24.00 Steel ONLY
003747-1.180
1 3/16” (3.01cm)
003901-00000
003747-1.250
1 1/4” (3.18cm)
003901-00000
003747-1.310
1 5/16” (3.34cm)
003901-00000
003747-1.370
1 3/8” (3.49cm)
003901-00000
003747-1.430
1 7/16” (3.65cm)
003901-00000
003747-1.500
1 1/2” (3.81cm)
003901-00000
003747-1.560
1 9/16” (3.97cm)
003901-00000
003747-1.620
1 5/8” (4.13cm)
003901-00000
003747-1.750
1 3/4” (4.45cm)
003901-00000
003747-1.810
1 13/16” (4.60cm)
003901-00000
003747-1.880
1 7/8” (4.76cm)
003901-00000
003747-2.000
2” (5.08cm)
003901-00000
All 4 1/4” (107.9mm) shanks can be cut to a 3 1/4” (82.55mm) shanks
“H” Thread Steel
Part Number
Shank Size
UC Length
005061-24.00
7/8" x 4 1/4" (22.2mm x 107.9mm)
24" (61.0cm)
05061B-24.00
1" x 4 1/4" (25.4mm x 107.9mm)
24" (61.0cm)
“H” Thread Bits
Part Number
Hole Diameter
Note
005140-1.370
1 3/8” (3.49cm)
005140-1.500
1 1/2” (3.81cm)
005140-1.620
1 5/8” (4.13cm)
005140-1.750
1 3/4” (4.45cm)
005140-1.870
1 7/8” (4.76cm)
005140-2.000
2” (5.08cm)
005140-2.250
2 1/4” (5.72cm)
005140-2.500
2 1/2” (6.35cm)
Multiple use bit
All 4 1/4” (107.9mm) shanks can be cut to 3 1/4” (82.55mm) shanks

Form: MM-A3/A5 Revised 9/8/14
- 13 -
Usage Calculation
The calculations below are nominal and could vary depending on the hardness of the
concrete, aggregates used and the possibility of bits hitting steel reinforcement.
Whirly Bit, Taper Bit and “H” Thread Bit
(B)Bit=180 holes x 9” (22.86cm)
B=1620” (4114.8cm)
Number of bits needed = (number of holes x hole depth)/1620”
Taper Steel and “H” Thread Steel
(S)Steel=600 holes x 9” (22.86cm)
S=5400” (13716cm)
Number of steels needed = (number of holes x hole depth)/5400”
Example:
Need 50,000 Holes 12” (30.48cm) Deep for the job.
(50,000 x 12)/1620 = 371 Bits
(50,000 x 12)/5400 = 112 Steels
Drill Bit Installation
1. Check to see that the hole through the center of the drill steel is not blocked, if so
remove the object.
2. Clean the tapered end of the drill steel and the inside of the drill bit with a non-
oily cleaner, making sure not to leave any oily residue.
3. Make sure a brass shim is in the drill bit. If not, carefully roll a new one and slide
it into the bit making sure that the ends do not overlap.
4. Put the drill bit on the tapered end of the drill steel and tap it on a firm surface to
seat the bit.
Drill Bit Removal
1. Swing latch so that drill steel can be removed from drill.
2. Pull drill steel out of drill.
3. Using two hammers, place one hammer on bottom side of bit. Using other
hammer, strike the bit on the topside. Rotate drill steel 1/4 turn and strike top of
bit again. Repeat procedure until bit comes off.
CAUTION: Bit may pop off of drill steel with some force.

Form: MM-A3/A5 Revised 9/8/14
- 14 -
Set-Up Procedure
1. Make sure that the lubricator is full. See Recommended Lubricants below.
2. Use a 1-1/4” (2 Gang), 1-1/2” (3 and 4 Gang) or 2” (5 Gang) hose to supply air to the
unit.
3. Install the drill steel and bit. See drill bit installation page.
4. Make sure that air compressor is on.
5. Remove the rail locking pin and swing rail into position.
6. Using the skid loader, lower and drag the unit into position, hooking lip onto slab.
Position the drill where the first hole is to be drilled. Make sure that rub strip is against
the slab.
7. Using the height adjusting screws, adjust the height to the required distance from the
top of the slap to the center of the hole, and the drill parallel to the slab.
8. Remove the slider lock pin using the feed lever. Feed the drill bit tight against the slab.
Measure from the end of the drill stop rod to the stop pad and adjust accordingly.
9. Make sure that the feed pressure regulator is set between 18 – 22 PSIG (1.24 – 1.52
Bar).
10.Using the drill control valve, drill the hold until the slider is against the stop. Then
measure the hold depth and adjust the stop accordingly.
11.You are now ready to start drilling.
Recommended Lubricants
Supplier
Ambient Temperature (Equivalent SAE)
Below 4˚C
4˚ - 36˚
Above 36˚
(SAE 10W)
(SAE 20, 30)
(SAE 40)
AGIP Product
Rock Drill
RD100
Caltex Product
RPM Vistac Oil 32X
RPM Vistac Oil
RPM Vistac Oil
or Rock Drill Lube 46
100X
320X
Texaco Product
Rock Drill
Rock Drill
Rock Drill
Lube 46
Lube 100
Lube 320
Chevron
Product
Vistac Oil
Vistac Oil
Vistac Oil
32X
100X
320X
Mobil Product
Almo Oil
Almo Oil
Almo Oil
No. 1
No. 2
No. 5
Shell
Shell Tona Oil
Shell Tona Oil
R100
R320 (150)
***DO NOT USE ENGINE OIL, DIESEL OR HYDRAULIC FLUID***

Form: MM-A3/A5 Revised 9/8/14
- 15 -
TROUBLE SHOOTING AIR DRILL
IF SYMPTOMS OF POOR PERFORMANCE DEVELOP, THE FOLLOWING CHART CAN BE USED AS A GUIDE TO
DETERMINE THE PROBLEM. WHEN DIAGNOSING FAULTS IN OPERATION OF THE AIR DRILL, ALWAYS CHECK
THAT THE COMPRESSOR IS SUPPLYING THE CORRECT SCFM AND AIR PRESSURE AS LISTED IN THE TABLE
PROBLEM
CAUSE
REMEDY
DRILL DOES NOT RUN DRILL NOT GETTING AIR 1. ON MULTI DRILL UNITS, SWITCH AIRLINE WITH
DRILL THAT IS WORKING PROPERLY. IF DRILL
NOW RUNS CHECK THE AIR CONTROL VALVE.
IF THE VALVE WORKS, CHECK THE DRILL.
2. CHECK VALVE ON AIR COMPRESSOR AND
DRILL UNIT TO BE CERTAIN THEY ARE
COMPLETELY OPEN.
3. CHECK COMPRESSOR. IT SHOULD HAVE
100SCFM (47.2Dm³/sec) PER DRILL AND 110PSI
(7.6BAR) AT DRILL MANIFOLD WHEN DRILLING
WITH LARGE DRILLS.
4. MAKE CERTAIN ALL FITTINGS ARE
CONNECTED PROPERLY AND NOT LEAKING.
COUPLING OR HOSE
OBSTRUCTION
REMOVE OBSTRUCTION.
FAILURE IN THE ELECTRICAL
CIRCUIT
CHECK SWITCHES, CONNECTIONS, COILS, GROUND &
VOLTAGE. IF THE POWER UNIT (BACKHOES, GRADER,
ETC.) IS BEING JUMP STARTED, CHECK THE AMPS &
VOLTAGE BEING SUPPLIED TO COILS FROM THE
BATTERY, IT MAY BE TOO LOW.
FAILURE OF DRILL SOLENOID
VALVE (MULTI DRILL UNITS WITH
REMOTE ELECTRICAL
CONTROLS)
CHECK VALVE - YOU SHOULD BE ABLE TO FEEL THE
SOLENOID MOVE WHEN IT IS ACTUATED. MAKE SURE
YOU HAVE CURRENT TO THE SOLENOID COIL.
REPLACE THE SOLENOID IF THERE IS NO MOVEMENT.
MECHANICAL FAILURE OF DRILL DISASSEMBLE THE DRILL & INSPECT IT FOR
DAMAGED PARTS.

Form: MM-A3/A5 Revised 9/8/14
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TROUBLE SHOOTING AIR DRILL
PROBLEM
CAUSE
REMEDY
DRILL RUNS SLOW OR DOES
NOT DRILL EFFECTIVELY NOT ENOUGH AIR REACHING
DRILL. IT SHOULD HAVE
100SCFM (47.2dm³/sec) PER
DRILL AND 110 PSI (7.6 Bar) AT
DRILL MANIFOLD WHEN
DRILLING WITH LARGE DRILLS
ON MULTI DRILL UNITS, TURN OFF ONE OR TWO
DRILLS. IF THE REMAINING DRILLS PICK UP SPEED,
CHECK THE AIR COMPRESSOR.
RESTRICTION IN AIR LINE A FOREIGN OBJECT IN THE AIR LINE OR POSSIBLY A
REDUCTION IN THE AIR LINE CAUSED BY A REDUCER
FITTING.
TOO SMALL AIR LINE FOLLOWING ARE SUPPLY LINE SIZES FOR DRILLING:
A-1 SINGLE DRILL 3/4" (19mm)
A-2 TWO DRILLS 1-1/4" (31.75mm)
A-3 & A-4 THREE & FOUR DRILLS 1-1/2” (38.1mm)
A-5 FIVE DRILLS 2" (50.8mm)
AIR PRESSURE TO CYLINDER
“FEEDING” DRILL INTO
CONCRETE NOT ADJUSTED
PROPERLY
EXCESSIVE PRESSURE CAN CAUSE DRILL TO “BIND
UP” IN THE HOLE. PRESSURE THAT IS TO LOW WILL
NOT “FEED” THE DRILL INTO THE CONCRETE. THE AIR
PRESSURE REQUIRED VARIES WITH THE DRILL
MODEL.
HORIZONTAL – ALL UNITS WITH LARGE DRILLS USE
22-26 PSI (1.5-1.8 Bar). DRILL UNITS USING THE 15LB
(6.8kg) CLASS DRILL WILL USE 16-20 PSI (1.1-1.4 Bar).
VERTICAL – ALL DRILL UNITS USE 5-6 PSI (0.34-0.41
Bar). WITH THE CORRECT AIR PRESSURE, THE DRILL
STEEL SHOULD HAVE A SLIGHT RATTLE.
INSUFFICIENT AIR FLOW TO
KEEP HOLE BLOWN CLEAN
CHECK FOR OBSTRUCTION IN THE BLOW TUBE IN
THE DRILL.
LUBRICATOR PUTTING OUT TOO
MUCH OIL TO DRILL
IF YOU NOTICE MORE THAN A LIGHT FILM OF OIL ON
THE AIR DEFLECTOR ON THE BOTTOM OF THE DRILL,
ADJUST THE LUBRICATOR. MAKE CERTAIN YOU ARE
USING THE TYPE OF OIL CALLED FOR IN THE
OPERATION AND MAINTENANCE MANUAL.
MECHANICAL BINDING OF DRILL
CARRIER
MAKE SURE THE EIGHT BEARING PADS ARE
ADJUSTED CORRECTLY. THE SQUARE TUBE THAT
THE DRILL CARRIER SLIDES ON MUST BE FREE OF
RUST SO THAT THE CARRIER SLIDES FREELY. DRILL
STEEL MUST NOT BE BINDING IN THE GUIDE
BEARING.
BENT DRILL STEEL, WORN DRILL
BIT OR DRILLING INTO REBAR
REPLACE THE DRILL STEEL OR BIT. IF DRILLING INTO
REBAR, MOVE THE DRILL.
USING 3 1/4”(8.25cm) SHANK
DRILL STEEL IN 4 1/4” (10.8cm)
SHANK CHUCK DRILL
THE DRILL STEEL WILL ROTATE BUT IT WILL NOT
ALLOW THE DRILL PISTON TO HAMMER PROPERLY.
REPLACE IT WITH THE CORRECT 4 1/4” (10.8cm) DRILL
STEEL.

Form: MM-A3/A5 Revised 9/8/14
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Cylinder Service Kits
Oversize Rod Cylinders (Feed)
Standard Rod Cylinders
Rod Diameter
Service Kit Part #
Rod Diameter
Service Kit Part #
1.50” (3.81 cm) Bore
5/8” (1.59 cm)
A12899-1.500
2.50” (6.35 cm) Bore
1” (2.54 cm)
A12895-2.500
5/8” (1.59 cm)
A12899-2.500
3.25” (8.26 cm) Bore
1 3/8” (3.49 cm)
A12895.3.250
1” (2.54 cm)
A12899-3.250
4.00” (10.16 cm) Bore
1” (2.54 cm)
A12899-4.000
5.00” (12.70 cm) Bore
1” (2.54 cm)
A12899-5.000
6.00” (15.24 cm) Bore
1 3/8” (3.49 cm)
A12899-6.000
7.00” (17.78 cm) Bore
1 3/8” (3.49 cm)
A12899-7.000

Form: MM-A3/A5 Revised 9/8/14
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Form: MM-A3/A5 Revised 9/8/14
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Form: MM-A3/A5 Revised 9/8/14
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