SKIDRIL HD20 Anwendungshandbuch

UNIT SERIAL NUMBER

SKIDRIL

P.O. BOX 8041

GREENSBORO, NC 27419

TEL: 800-843-3745

1-800-843-3745

OPERATION & PARTS

MANUAL

SKIDRIL

HYDRAULIC ROCKDRILL

MODEL HD20

ANY PERSON

OPERATING THIS

MACHINE SHOULD

READ AND

UNDERSTAND THIS

MANUAL FIRST!

FOLLOW ALL SAFETY

INSTRUCTIONS

Technical Data

MODEL HD20

WORKING PRESSURE 1600-1800 psi

MAX PRESSURE 2500 psi

WEIGHT 46 lbs

DIMENSIONS LxW 24-5/8” x 16-1/4”

TOOL CHUCK SIZE 7/8” x 4-1/4”

HOSE CONNECTION 3/8”

REQUIRED OIL FLOW 5.5-7 GPM

DRILL HOLE FLUSHING BUILT-IN

AIR COMPRESSOR

COMPRESSOR PRESSURE 29 psi

AIR DISPLACEMENT 28 CFM

CONTROL IDENTIFICATION 4

APPLICATIONS 5

OPERATION 6

MAINTENANCE 8

TROUBLESHOOTING 10

EXPLODED VIEWS & PARTS 15

WARRANTY/TIPS/SERVICE 18

TECHNICAL DATA 20

Contents

1Warranty Information

The production of SKIDRIL hydraulic equipment is based on many years of

experience and the use of high quality material which enables the equipment to

resist the mechanical and thermic stress occurring under normal working

conditions.

THE WARRANTY CEASES ON CHANGE OF OWNERSHIP OF THE EQUIPMENT AND IN

CASE OF REPAIRS UNDERTAKEN BY A NON-AUTHORIZED SKIDRIL SHOP WITHOUT

THE FACTORY’S EXPRESS AUTHORIZATION.

SKIDRIL dealer

WARNING!

*KEEP HANDS

AND FEET CLEAR

of moving parts of

rockdrill while in

operation!

*DO NOT stand

below rockdrill when

operating.

*DO NOT use the

rockdrill over your

head.

NOTICE!

*DO NOT use the

rockdrill in applications

for which it is not

intended!

* DO NOT operate

the rockdrill with

damaged or missing

parts or fasteners!

* DO NOT handle

rockdrill after long

periods of use without

wearing thick gloves

as the rockdrill may

become hot!

Applications

Parts List

The following constitute conventional and

acceptable uses for the HD20 hydraulic drill/

breaker.

1. Hand drilling up to a 3-1/2” diameter hole in

rock or concrete up to a depth of 5’ by

turning rotation control dial to vary rotation speed

up to 400 RPM..

2. Hand breaking rock or concrete by turning

rotation control dial (item G, page 4)

completely clockwise to stop drill rotation.

The following are considered unconventional uses,

and are therefore not covered under warranty.

1. Permanently mounting the rockdrill as in a

boom or truck-mounted application.

2. Using the rockdrill in underwater drilling

applications.

3. Using the rockdrill on a power source which

exceeds the stated required flow and pressure.

4. Dropping the rockdrill tool first into work.

i.e. - using the machine manually to hammer.

5. Using tools other than the specified

required size.

6. Using the rockdrill for any other purpose than

described in this section.

Operation Continued

NOTICE!

*DO NOT use

more than 25’ of

supply hose as

performance will be

reduced..

*DO NOT allow

bystanders within 20

feet of the drill while

in operation.

*DO ensure you

have safe footing

before starting the

drill.

*DO wear safety

boots, hard hat,

gloves, eye and ear

protection while

using the rockdrill.

*STOP operation if

you notice any oil

leaks.

*ALWAYS lay the

drill flat on the

ground while not in

operation.

*ALWAYS clip

quick-connect

couplings back

together to

minimize damage

Nitrogen Accumulator

8. Stop the hydraulic power source before

proceeding.

9. Disconnect the quick-connect couplings at

the rockdrill end. Connect both sets of

couplings to one another to keep the

connections clean and to minimize oil

leakage.

10. Open the drill stay and remove the tool.

11. Clean the air compressor filter per

maintenance instructions (see page 8).

12. Wipe remaining dust or oil from machine

before storing for the next job.

CHARGING THE NITROGEN ACCUMULATOR

WARNING! - Working with compressed nitrogen gas is

dangerous. SKIDRIL recommends this service be

performed during scheduled maintenance by an

authorized SKIDRIL Dealer. Should you decide to perform this

procedure yourself, call SKIDRIL to aquire a set of

detailed instructions and the proper equipment to use in

charging the nitrogen accumulator.

The nitrogen accumulator is a feature of the HD20 that requires regular

service. From time to time, as you notice the impact energy decrease

while using the machine, the nitrogen accumulator will need to be re-

charged with nitrogen gas. SKIDRIL strongly recommends sending your

unit into an authorized SKIDRIL dealer to have this service performed,

as this procedure is dangerous and should not be performed by

untrained or unqualified individuals. Should you decide to perform this

procedure yourself, call SKIDRIL for detailed instructions to follow before

beginning the procedure.

NOTICE!

Call SKIDRIL at (800) 843-3745 before attempting any

maintenance to the nitrogen accumulator section (Item J, page

4) of the model HD20 rockdrill.

Maintenance Continued

Troubleshooting Continued

6. Oil leaks from control lever.

Inspection Point 200 Hours or

One Year 400 Hours or

Two Years Over Three

Years

Accumulator Gas

Pressure Check X

Replace Accumulator

Diaphragm X*

Replace U-Cup packing X*

Replace valve rod

O-ring X*

Replace Compressor

Piston Ring X

Replace Gear Case

Grease X*

Replace Motor Shaft

O-ring X*

Replace Every O-ring X*

SERVICE SCHEDULE

CAUSE SOLUTION

Worn or hardened O-ring. * Replace.

7. Oil is escaping with compressed drill flushing air.

CAUSE SOLUTION

Piston rod seal worn * Replace

Piston rod seal scratched. Replace or remove scratch.

8. Oil leaks from gear case assembly.

CAUSE SOLUTION

Motor shaft O-ring is worn. * Replace

Damaged packing * Replace

Motor housing O-ring worn. * Replace

9. Oil leaks from internal shaft.

CAUSE SOLUTION

Gear housing O-ring worn. * Replace.

* SKIDRIL strongly recommends having your model HD20

rockdrill serviced exclusively by a factory authorized SKIDRIL

service center. Due to extremely high manufacturing

tolerances, many service procedures require special tools

and/or techniques to be performed sucessfully and without

causing damage to other components of the rockdrill.

Troubleshooting Continued

Troubleshooting

CAUSE SOLUTION

Hydraulic power source is not

in operation, or selector valve

has not been turned on.

Start the power source and

switch selector valve to allow oil

to flow to rockdrill.

Disconnected hose. Connect the hose.

Quick coupling. Check the couplings.

Connections to rockdrill are

reversed. Check connections. With

rockdrill standing up, high

pressure should go into top

orifice, return should go to lower.

Relief valve setting on power

source too low Raise relief valve setting.

Broken control valve. * Replace.

Control valve malfunction. Disassemble drill, improve control

valve and valve body fitting and

eliminate foreign matter.

1. Drill does not operate when

control lever is depressed.

2. Drill hammers but will not rotate.

CAUSE SOLUTION

The rotation adjust dial is

turned fully clockwise (Closed

position).

Turn the knob counterclockwise

to achieve the desired drill speed.

The gear motor key is worn or

damaged. * Replace.

The gear motor is obstructed

by debris. Disassemble and clean.

3. Drill operates but strikes and rotates at slow rate.

CAUSE SOLUTION

Low hydraulic source flow rate. Increase flow rate by increasing

engine RPM on power source.

Relief valve setting on power

source is too low. Set to proper pressure.

4. Striking rate is normal, but impact is weak.

CAUSE SOLUTION

Low accumulator gas pressure. Increase pressure to 40 kg/cm2 by

charging with nitrogen gas. See

page 14 for imporatant note.

Broken accumulator diaphragm. * Replace.

5. Drill flushing air is weak.

CAUSE SOLUTION

The air cleaner element or

sponge is clogged with debris. Clean with soapy water, rinse,

wring out and replace.

Debris stuck in compressor lead

valve. Disassemble and remove debris.

Compressor piston ring is worn. * Replace

Compressor bushing is worn. * Replace.

Troubleshooting Continued

Maintenance

1. The rockdrill requires no lubrication other than that which is

automatically provided by the hydraulic fluid.

2. Check the hydraulic oil volume of the power supply to ensure the level

is sufficient for operation before each use.

3. Check the hydraulic oil condition after each use. Replace the oil if it

appears milky or changes color, or if it becomes sticky.

WARNING! - Do not touch hydraulic oil directly as it may be hot and is a

known carcinogen when absorbed through the skin!

4. The air cleaner sponge and element (see below) should be cleaned

after each use. Clean thoroughly with soapy water, rinse and wring dry.

Failure to do this will result in poor flushing of the drill cuttings, and

worse may result in premature wear of the

compressor cylinder, piston ring and valve.

HOOK

CLEANER ELEMENT

CLEANER SPONGE

CLEANER

COVER

10. Drill rod rotates but does not impact.

CAUSE SOLUTION

The rotation adjust knob is

turned fully counter-clockwise. Turn knob clockwise to achieve

desired impact.

Control valve is damaged. * Replace.

Piston is damaged. Replace the piston and

hammer.

* SKIDRIL strongly recommends having your model HD20

rockdrill serviced exclusively by a factory authorized SKIDRIL

service center. Due to extremely high manufacturing

tolerances, many service procedures require special tools

and/or techniques to be performed sucessfully and without

causing damage to other components of the rockdrill.

Exploded Views

Operation

PREPARATION FOR USE

1. Inspect all fasteners and ensure they are tight

before each use.

2. Inspect all hydraulic hoses, couplings and

fittings for wear or damage before each use.

3. Connect hoses of power supply to drill before

starting power source. Make sure connections are

clean and free of dirt or other debris before

connecting. Connect pressure side to top hose, and

the return side to the bottom hose. Confirm

connections are complete and secure before

proceeding.

4. Open the drill stay (item I, page 4) and insert

the tool appropriate for the application, drill steel

or breaker steel. Close the drill stay.

IMPORTANT NOTE:

The air compressor

operates regardless of whether you are using the

machine to drill or break. Therefore, you must use

breaker tools which are slotted on the hex end to

allow the compressed air to

escape. Using standard breaker tools will

result in unsatisfactory breaking performance. Call

SKIDRIL for prices and availability of

slotted breaker tools.

5. Start the hydraulic power source and open flow

control valve to charge the circuit to the rockdrill.

6. Grip the machine by the handles. Ensure you

have safe footing before starting the drill by

pressing down on the control lever (item A, page

4). The drill will begin to operate.

7. When finished drilling, release the control lever.

WARNING!

*DO NOT operate

the rockdrill with

damaged hoses,

fittings or fasteners.

*DO NOT substitute

hoses for another

make/type.

*DO NOT stand

below rockdrill when

operating.

*DO NOT use the

rockdrill over your

head.

NOTICE!

*ALWAYS inspect

hoses, fasteners,

couplings before

each use!

*ALWAYS

connect both

hydraulic hoses to

the the tool before

starting the

power source!

* ALWAYS be sure

couplers are clean

and free of debris

before

NOTE: To find part numbers, cross-reference the numbers in the

exploded view below with the list of part numbers on the

following page.

Service Notes

Control Identification

A - CONTROL LEVER - Starts and stops drilling/impact function.

B - HANDLE GRIP - Used to control and support the drill.

C - AIR COMPRESSOR - Compresses air for flushing drill hole cuttings.

D - HYDRAULIC HOSES - Top is pressure, Bottom returns to power source.

E - COUPLINGS - Connect to power source hoses, or to each other when not in operation.

F - AIR CLEANER - Filters drill dust from air before entering compressor.

G - ROTATION ADJUST DIAL - Adjusts speed of rotation from no rotation to high-speed rotation.

H - GEAR MOTOR - Scavenges a portion of the hydraulic flow to rotate the drill steel.

I - DRILL STAY - Keeps tool or drill steel from slipping out of the machine.

J - NITROGEN ACCUMULATOR - Dampens recoil, increases impact energy.

Nitrogen Accumulator JA

Your SKIDRIL requires regular service (at least

annually) to maintain it in good running order, and

ensure long life.

How to obtain service:

Call SKIDRIL for a Repair Order number.

Toll-free (800) 843-3745

Where to obtain service:

SKIDRIL INC.,

Attn: Repair Order No. XXXXX

235 Labrador Drive

Randleman, NC 27317

Helpful Tips & Service

Cleaning the air filter element and sponge after

each use will greatly extend the service life of

the rockdrill.

To maximize driving power, do not use more

than 25’ of hose from the power source to the

rockdrill.

To prevent dirt from entering the quick-connect

couplings, and possibly damaging the breaker or

pack, be sure to clip couplings together after

disconnecting driver from pack.

SAFETY FIRST

READ, UNDERSTAND AND FOLLOW

SAFETY GUIDELINES AND SAFE WORK

PRACTICES.

Special

notice

goes here

TAKE NOTE OF WARNINGS IN THIS MANUAL

AS THEY IDENTIFY INSTRUCTIONS INTENDED

TO PREVENT INJURY TO YOU OR OTHERS.

NOTICES:, ARE INTENDED TO PREVENT

DAMAGE TO THE MACHINE OR PROPERTY.

WARNING!

DO NOT:USE EQUIPMENT IN APPLICATIONS FOR WHICH IT IS

NOT INTENDED.

DO NOT: USE IMPROPERLY TRAINED OR UNQUALIFIED

PERSONNEL TO OPERATE OR PERFORM REPAIRS ON THIS

EQUIPMENT.

DO NOT: LEAVE MACHINE RUNNING UNATTENDED OR WHEN

NOT IN USE.

DO NOT: REFUEL OR ADD HYDRAULIC OIL TO A HOT OR

RUNNING MACHINE.

DO NOT: SPILL FUEL OR HYDRAULIC OILWHEN FILLING THE

MACHINE.

DO NOT: SMOKE WHILE FUELING OR OPERATING MACHINE.

DO NOT: REFUEL NEAR AN OPEN FLAME OR SPARK.

DO NOT: OPERATE THE MACHINE WITHOUT PROPER SAFETY

PROTECTION SUCH AS PROTECTIVE EYEWEAR, SAFETY

BOOTS, EAR PROTECTION, HARD HAT, GLOVES ETC.

DO NOT: OPERATE THE MACHINE INDOORS OR IN AN AREA

WHERE EXHAUST GASES MAY COLLECT., OR WHERE

VENTILATION IS NOT ADEQUATE.

DO NOT:OPERATE THE MACHINE WITHOUT SOLID FOOTING OR

WITH THE MACHINE ELEVATED ABOVE YOUR HEAD.

DO NOT: STORE THE MACHINE IN A PLACE OR POSITION

THAT IT MAY FALL , DROP OR SLIDE FROM WHEN NOT IN USE.

DO NOT: OPERATE THE MACHINE WITH LOOSE, DAMAGED OR

MISSING PARTS.

NOTICE:

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