RGC ROCK DRILL User manual

ROCK DRILL
INSTRUCTIONS
REIMANN & GEORGER CORPORATION
CONSTRUCTION PRODUCTS BUFFALO, NY
P/N 6122125 08/29/05

RGC CONSTRUCTION PRODUCTS PHONE: [phone]
TABLE OF CONTENTS
CHAPTER DESCRIPTION PAGE
1SAFETY........................................................................................................................................1
1.1 Introduction....................................................................................................................................1
1.2 Safety Definitions...........................................................................................................................1
1.3 Rock Drill Safety Rules..................................................................................................................1
2SPECIFICATIONS......................................................................................................................3
2.1 Introduction....................................................................................................................................3
2.2 Technical Data................................................................................................................................3
2.3 Recommended Hydraulic Oil.........................................................................................................3
2.4 Nameplate and Serial Number Tag.................................................................................................4
3OPERATION................................................................................................................................5
3.1 Before Operating The Breaker .......................................................................................................5
3.2 Low Ambient And Oil Temperature Startup (<32°F) ....................................................................5
3.3 High Ambient And Oil Temperature Startup (>100°F)..................................................................5
3.4 Connection to Hydraulic Power Source .........................................................................................6
3.5 Drilling Procedure..........................................................................................................................6
3.6 Preparing Breaker For Shutdown...................................................................................................7
3.7 Optional Weight Block...................................................................................................................7
3.8 Air Flushing....................................................................................................................................7
4INSPECTION AND MAINTENANCE......................................................................................8
4.1 General Maintenance Rules............................................................................................................8
4.2 Daily Maintenance..........................................................................................................................8
4.3 Annual Maintenance.......................................................................................................................9
4.4 Long-Term Storage ........................................................................................................................9
5TROUBLESHOOTING..............................................................................................................10
6PARTS LISTS..............................................................................................................................11
6.1 Impact Assembly...........................................................................................................................11
6.2 Valve Housing Assembly..............................................................................................................14
6.3 Motor Gear Assembly ...................................................................................................................14
6.4 Accumulator..................................................................................................................................15
6.5 Cylinder Assembly........................................................................................................................16
6.6 Hose Assembly..............................................................................................................................17
6.7 Ergonomic Handle Assembly........................................................................................................18
6.8 Connecting Block Assembly.........................................................................................................19
LIST OF FIGURES
FIGURE DESCRIPTION ....................................................................................................................... PAGE
2-1 Typical Product Nameplate ............................................................................................................4
6-1 Rock Drill Impact Assembly.........................................................................................................12
6-2 Valve Housing Assembly..............................................................................................................13
6-3 Motor Gear Assembly ...................................................................................................................14
6-4 Accumulator Assembly .................................................................................................................15
6-5 Cylinder Assembly........................................................................................................................16
6-6 Hose Assembly..............................................................................................................................17
6-7 Handle Assembly...........................................................................................................................18
6-8 Connecting Block Assembly.........................................................................................................20

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1SAFETY
1.1 INTRODUCTION
Your Reimann & Georger Corporation Rock Drill has been engineered to provide breaking performance, long term
economics and safety advantages that no other type can match. However, even well-designed and well-built equipment can
malfunction or become hazardous in the hands of an inexperienced and/or untrained user. Therefore, read this manual and
related equipment manuals thoroughly before operating your Rock Drill to provide maximum safety for all operating
personnel, and to get the maximum benefit from your equipment.
1.2 SAFETY DEFINITIONS
A safety message alerts you to potential hazards, which could injure you or others or cause property damage. The safety
messages or signal words for product safety signs are DANGER, WARNING, and CAUTION. Each safety message is
preceded by a safety alert symbol and is defined as follows:
DANGER: Indicates an imminently hazardous situation which, if not avoided, will cause death or serious injury. This
safety message is limited to the most extreme situations.
WARNING: Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.
CAUTION: Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury. It
may also be used to alert against unsafe practices that may result in property-damage-only accidents.
1.3 ROCK DRILL SAFETY RULES
1. Only trained personnel shall operate the Rock Drill or do repairs. A trained person is one who has read and thoroughly
understands this instruction manual and related equipment manuals and, through training and experience, has shown
knowledge regarding the safe operational procedures.
2. Construction area is to be kept clear of unauthorized personnel at all times. Place barricades or secure the area in such
a manner that no personnel would be injured by flying debris.
3. A hard hat must be worn by operator and all bystanders to prevent head injuries.
4. Extra caution should be used whenever drilling upwards or horizontally to be aware of falling debris and to prevent
slipping or falling down.
5. Never use the Rock Drill in an explosive atmosphere and/or near combustible material that could be ignited by a spark.
6. Provide adequate ventilation or approved NIOSH or MSHA respirators in closed areas to avoid breathing dust during
drilling.
7. The outside surface of the Rock Drill can be more than 30°C (86°F) warmer than the air temperature. Always wear
protective clothing including gloves.
8. Keep clothing and all parts of the body away from moving parts of this Rock Drill when connected to a hydraulic
power source or when being used.
9. Safety goggles must be worn by operator and all bystanders to prevent injury to eyes.
10. Safety shoes must provide good footing to prevent slipping or falling down.
11. Hearing protection must be worn by operator and all bystanders to prevent permanent hearing damage.
12. Avoid “free blows.” Free blows result when the tool is operating, but is not contacting the material being drilled.

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13. Use only properly sized tool steels for which the Rock Drill was designed.
14. Do not lean against the Rock Drill to prevent losing foothold. The tool steel could accidentally break or suddenly
penetrate the material.
15. Never operate the Rock Drill under the influence of drugs, alcohol, or medication.
16. Do not use the Rock Drill when you are tired or fatigued.
17. Do not use a Rock Drill that shows any signs of damage.
18. Keep the handles dry, clean, and free of oil or fuel.
19. Always hold the Rock Drill with both hands during operation.
20. Do NOT attempt to adjust the Rock Drill during operation.
21. Always shut off the hydraulic power source before disconnecting the hoses, or servicing the Rock Drill.
22. Always shut off the hydraulic power source when not using the equipment.

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2SPECIFICATIONS
2.1 INTRODUCTION
Your Reimann & Georger Corporation Hydraulic Rock Drill is designed for drilling blast holes and test drillings etc. in
granite and concretes. A built in torque limiter ensures that the operator can always hold the Rock Drill, if the drill bit gets
stuck. As with most hydraulic tools, the hydraulic system requirements detailed in the following section must be met but
not exceeded to support tool performance and longevity of equipment.
2.2 TECHNICAL DATA
ENGLISH
METRIC
Weight with hose whips and without tool steel 57 lbs. (26 kg.)
Overall Size 17-7/8 x 23-5/8 in. (455 x 600 mm)
Oil flow 5.3 – 6.6 gpm (20-25 lpm)
Oil pressure range 1450-2000 psi (100-140 bar)
Maximum back pressure in return line 215 psi (15 bar)
Steel size (hex) 7/8 X 4- 1/4 in. (22 X 108 mm)
Drill diameter 63/64 – 1-31/32 in. (25 - 50 mm)
Hollow drill ( ISO series 11-17 )
Maximum drill depth without compressed air 20 in. (500 mm)
Maximum hollow drill depth (depending on material) 19.7ft. (6 m)
Air flow requirements for drilling
Air flow 14 - 42 cfm (0.4 – 1.2 cmm)
Pressure 72 – 145 psi (5 – 10 bar)
Torque 48 lbft. (65 Nm)
Revolutions (clockwise) 320-400 rpm
Accumulator charge pressure (nitrogen) 580 psi (40 bar)
Required cooling capacity 7500 BTU/hr. (2.2 kw)
Energy per impact 24-28 ft.-lb. (32-38 joules)
Blow frequency (blows/minute) 2400 @ 5.3 gpm,3000 @ 6.6 gpm (40-50 Hz)
Sound level (decibels) 98 dB
Couplings 1/2” HTMA flush face
2.3 RECOMMENDED HYDRAULIC OIL
Viscosity 100-200 SUS at 100°F (20-40 cSt at 40°C)
Viscosity index Minimum 100
Many types of compatible hydraulic oil are available through your local dealer/distributor. As an original equipment
manufacturer, RGC supplies a Grade ISO VG 32 hydraulic oil.
Hydraulic oil types are too numerous to list in this manual. If you have any question concerning the type of oil suitable for
rock drill operation, please consult your local supplier or Reimann & Georger Corporation for details.

2.4 NAMEPLATE AND SERIAL NUMBER TAG
It is important to identify your Rock Drill completely and accurately whenever ordering spare parts or requesting assistance
in service. The Rock Drill has a product nameplate that states the model and serial numbers. The Rock Drill label should
appear as the sample nameplate shown in Figure 2-1. Record the model and serial numbers for future reference.
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HYDRA TOOL
MODEL
SERIAL NO.
GPM PSI
Figure 2-1.
Typical Product Nameplate
MODEL ROCK DRILL
SERIAL NUMBER

3OPERATION
3.1 BEFORE OPERATING THE ROCK DRILL
CAUTION:
THE HYDRAULIC ROCK DRILL CANNOT RECEIVE A REVERSE OIL FLOW WITHOUT
SUSTAINING SOME FORM OF DAMMAGE. USE OF A POWER SOURCE OTHER THAN AN
RGC POWER UNIT REQUIRES THAT THE MANUAL FOR THAT POWER SOURCE BE
CHECKED FOR PRESSURE AND TANK CONNECTIONS TO INSURE PROPER OIL FLOW
DIRECTION. ROCK DRILL WARRANTY MAY BE IN JEOPARDY IF CAUTION IS NOT
EXERCISED PRIOR TO CONNECTION OF TOOL.
1. Read and fully understand the operating manual for the hydraulic power source being used.
2. Every tool has a maximum operating flow and pressure, which, if exceeded, is a potential cause of damage to the tool
or hydraulic power source. Check the power supply’s flow and pressure output against the tool’s requirements.
3. Use caution when refueling a gasoline driven hydraulic power source. Make sure the gas caps on the hydraulic power
source and fuel can are properly tightened. Move the hydraulic power source at least 10 feet from the fueling point
before starting the engine.
4. Do not start drilling without first checking for live electrical wiring or utility/supply piping near the drill site, or
imbedded in the material to be drilled.
3.2 LOW AMBIENT AND OIL TEMPERATURE STARTUP (<32°F)
Oil temperatures can affect both power supply and tool performance. For ambient operating temperatures between 0-32°F,
RGC recommends a warm-up period relative to outside temperatures to insure proper performance levels.
Oil becomes more viscous or thick as the ambient temperature lowers, which slows down the system. It is necessary to
pre-heat the hydraulic oil in the power supply before use by proceeding as follows:
1. Leave the equipment inside a heated facility before use if practical, but this is not always possible.
2. At the job site, start the power supply and let the engine warm up for 5 minutes WITHOUT tool or hoses connected.
3. Adjust throttle speed to full engine rpm, then SLOWLY turn flow valve to ON position. Allow unit to run for 5-7
minutes, then turn flow valve to OFF position. Return engine RPM to slow idle; then turn off engine. Connect tool
and hydraulic hoses as described in section 3.4. This procedure will labor the engine and generate the required heat in
the power supply oil.
4. Taking the time to pre-heat the oil far exceeds the length of time it takes to get the system up to speed without pre-
heating, but this will provide the level of designed performance.
3.3 HIGH AMBIENT AND OIL TEMPERATURE STARTUP (>100°F)
Oil becomes less viscous or thinner as ambient temperature increases which causes the hydraulic oil to operate at an
elevated temperature. For ambient operating temperatures above 100°F (38°C), RGC recommends the following:
1. Insure that the hydraulic fluid level is up in the power supply reservoir.
2. Operate the tool at a reduced cycle time—10 minutes on, then 10 minutes off.
3.4 CONNECTION TO HYDRAULIC POWER SOURCE
1. Before making any hydraulic connections, inspect all hoses for leaks and risks of rupture as follows:
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a. Inspect each hose for breaks, cracks, worn spots, bulges, chemical attack, kinks or any other damage. Never stop
any detected leak with your hand or fingers. Do not put your face close to suspected leaks. Hold a piece of
cardboard close to suspected leaks and then inspect the cardboard for signs of hydraulic oil.
b. Replace a damaged hose immediately. Never repair the hose.
WARNING:
LIQUID UNDER HIGH PRESSURE CAN PIERCE THE SKIN, CAUSING DEATH OR SERIOUS
INJURY. HOT LIQUID CAN CAUSE SERIOUS PERSONAL BURNS. IF AN INJURY OCCURS,
GET IMMEDIATE MEDICAL ATTENTION.
2. For connection, use a high pressure hose (inside diameter 1/2”) which, as a minimum, is designed for a working
pressure of 2500 psi. The breaker socket “P” is the oil inlet (pressure), and the socket “T” is the oil outlet (tank).
3. The Rock Drill uses flush-face quick-release couplings, which are durable and very easy to clean. They are always
fitted such that the male part gives oil and the female part receives oil.
4. The Rock Drill is designed for an oil flow of 5.3-6.6 gpm at 1400-2000 psi. Do NOT exceed this flow or pressure.
5. If the oil flow cannot be adjusted by lowering the rpm, a flow divider must be installed. This will insure the Rock
Drill receives the correct oil flow and return excess oil back to the tank.
6. To protect the Rock Drill from excessively high pressure, the pressure relief valve of the hydraulic power source must
be set at 2000 psi (140 bar). If this is not possible, installing a separate pressure relief valve set at 2000 psi (140 bar)
can be used to make the connection. If in doubt, contact your dealer.
7. The backpressure (return line pressure) of the Rock Drill should be as low as possible and must not exceed 215 psi (15
bar) measured at the Rock Drill. If this pressure is exceeded, the Rock Drill will not rotate.
8. The hydraulic power source must be fitted with a return line oil filter with a filter rating of 10 microns.
3.5 DRILLING PROCEDURE
1. Check that the drill bit is intact and sharp and that the drill bit is pressed fully home in the nose part.
2. Clean the quick-release couplings if needed and connect the hose whips to the extension hoses from the power source.
3. When lifting the Rock Drill to start the procedure, observe the following precautions:
a. Be sure of your footing.
b. Keep hands off trigger to avoid accidental operation.
c. Bend your knees and lift with your legs.
d. Hold Rock Drill close to your body when lifting.
5. Place the Rock Drill vertically on the surface in which the hole is to be made and activate the trigger lever. Make sure
just enough feed force is being applied to have the Rock Drill run regularly. Activating the trigger partially when
starting provides a slow start for improved control.
6. If different length drills are required to drill the same hole, the bits MUST be from the same ISO- series. Failure to do
this can cause binding of the bit resulting in tool and / or drill bit damage and personal injury. Use just enough feed
force to have the Rock Drill run regularly.
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CAUTION:
AVOID “FREE BLOWS” (THE PISTON HITTING THE UNSUPPORTED DRILL), AS THIS
WILL LEAD TO UNNECESSARY HEATING OF THE OIL AND IN THE LONG RUN
DAMAGE BOTH SEALS AND ROCK DRILL.
7. When drilling without air flushing (use of compressed air), a hollow drill bit with an open air hole MUST NOT be
used, as this will cause excessive dust accumulation around the piston causing accelerated wear of the piston and seals.
3.6 PREPARING ROCK DRILL FOR SHUTDOWN
1. Stop the Rock Drill by releasing the trigger lever.
2. Stop the hydraulic power source following the procedure in the respective instruction manual.
3. Disconnect the hoses from the Rock Drill.
WARNING:
NEVER DISCONNECT ANY HYDRAULICALLY OPERATED PART OF THE ROCK
DRILL OR REMOVE HYDRAULIC COMPONENTS, LINES, OR FITTINGS WHILE THE
POWER SOURCE IS RUNNING OR WHENEVER THE HYDRAULIC FLUID IS HOT.
LIQUID UNDER HIGH PRESSURE CAN PIERCE THE SKIN, CAUSING DEATH OR SERIOUS
INJURY. HOT LIQUID CAN CAUSE SERIOUS PERSONAL BURNS. IF AN INJURY OCCURS,
GET IMMEDIATE MEDICAL ATTENTION.
4. Secure the Rock Drill and hydraulic power source to prevent unauthorized use.
5. Store the Rock Drill away from excessive heat or moisture. Store in a clean, dry area away from exposure to high
humidity, liquids, or freezing temperatures.
3.7 OPTIONAL WEIGHT BLOCK
The Rock Drill is provided with threaded holes for mounting a weight block or supporting root. When using a weight block
of 25-33 lbs. as additional weight, it is not necessary for the operator to apply any additional feed force. This is particularly
advantageous if the job takes a long time.
3.8 AIR FLUSHING
When air flushing is required, the Rock Drill can be connected to any air compressor with a minimum 14 cfm at 70psi
output. If the holes to be drilled are not deep, and the drilling dust is dry, a small compressor capacity will often be
sufficient, whereas the drilling of deeper holes with moist dust will require a higher compressor in order to achieve
sufficient air flushing.
Connection can be made by means of standard air components and hose with a minimum rating of 145psi (10bar). The
hose diameter should not be less than 1/2” ID in order to prevent pressure loss.
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4INSPECTION AND MAINTENANCE
4.1 GENERAL MAINTENANCE RULES
Hydraulic fluid can become contaminated after extended periods of use which can cause restrictions in the system. Check
to see that the fluid is clean, and change at recommended intervals to extend tool’s life. Refer to the respective manual for
maintenance information on the hydraulic power source.
1. Proper maintenance of the Rock Drill and related equipment requires timely adhering to all the guidelines given in this
chapter. Proper maintenance is required to maintain the system in good condition and free of defects.
2. Review and follow all the safety rules given in Chapter 1 before attempting any maintenance.
3. Only authorized personnel should be allowed in the maintenance area. Authorized personnel are the trained people as
defined below and their supervision.
4. Repairs must be made only by trained personnel. A trained person is one who has read and thoroughly understands this
instruction manual and related equipment manuals and, through training and experience, has shown knowledge
regarding the safe operational procedures.
CAUTION:
BEFORE STARTING ANY MAINTENANCE, DISCONNECT FROM HYDRAULIC POWER
SOURCE TO PREVENT ACCIDENTAL STARTUP.
WARNING:
DURING ANY MAINTENANCE OR REPAIR PROCEDURES, DO NOT ATTEMPT ANY
DRILLING. THIS CAN CAUSE SERIOUS PERSONAL INJURY AND/OR EQUIPMENT
DAMAGE.
4.2 DAILY MAINTENANCE
1. Wipe couplings clean and connect hydraulic hoses to an unpowered (not activated) hydraulic source.
2. Remove the tool steel. With a clean object, push the piston through the bushing to it’s inner most position. Remove
the object and using the grease nipple located in the nose assembly, lubricate the bushing with Molykote grease, like
Mobiletac 81 or similar. Failure to grease the nose assembly every 8 hours of operation will cause the drive system to
stop rotating.
3. Clean off any accumulation of particles from beneath the trigger area. Spray with a light oil and wipe off excess.
4. Disconnect hydraulic hoses and wipe couplings clean, especially before a connection is made. This is the single most
common point of entry for foreign particles which can cause premature wear of hydraulic components in the system.
5. Check that all hardware on the Rock Drill is tight.
6. Check the hoses before each use for damage. Replace a damaged hose immediately. Never repair the hose.
7. Before each use, insure that all broken, worn or defective parts are repaired or replaced.
8. Insure the tool steel is sharp to give maximum drilling power and operator comfort.
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