DOA AH 15 Guide

AH 15
HYDRAULIC ACTUATOR – DRIVE HEAD
DOA s.r.l.
VIA CORTIVA 5- 22060 NOVEDRATE (Como) ITALY
TEL [phone] FAX [phone]
www.doa.it e-mail: [e-mail]
USE - SAFETY AND
MAINTENANCE MANUAL
IMPORTANT
READ MANUAL BEFORE USE
KEEP THIS MANUAL FOR
FUTURE CONSULTATIONS
JUNE 2003 – 1ST ISSUE

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CONTENTS OF THE MANUAL
Page
•INTRODUCTION 3
•SAFETY SYMBOLS 4
•DESCRIPTION OF THE PRODUCT
DESCRIPTION 5
TYPICAL APPLICATION 5
SPECIAL ACCESSORIES ON REQUEST 5
STANDARD ACCESSORIES ON REQUEST 5
TECHNICAL CHARACTERISTICS
GENERAL VIEW -MAIN COMPONENTS ANDTHEIR FUNCTIONS 6
WEIGHT AND DIMENSION 7
PERFORMANCES 7
HYDRAULIC CHARACTERISTICS 7
•GENERAL SAFETY NORMS 8
•USE OFTHEPRODUCT
WHAT NOT TO DO 10
BEFORE OPERATING 12
USE OFTHE TOOL 13
OPERATIONS 14
REGULATIONOFTHE TORQUE 15
REGULATION OFTHESPEED 16
END OF OPERATIONS 16
•MAINTENANCE AND CARE
CLEANING 17
PERIODICAL CONTROL 17
MAINTENANCE 17
MAINTENANCE OF THE ACCESSORIES 17
MAINTENANCEOFTHE FLEXIBLEHOSES 18
DISPOSAL AND SCRAPPING 19
REPAIR 20
GENERAL INFORMATION ONTHE REPAIR 21
DISASSEMBLY 22
•PROBLEM / CAUSE / SOLUTION / CHART 23
•WARRANTY 26
•EXPLODED VIEW AND PART LIST attached separated sheet

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INTRODUCTION
Dear customer,
congratulations for having purchased a DOA product. The machine you bought was
manufactured with high quality materials to assure your maximum satisfaction and a long lasting
service without problems. For your safety and obtaining the best result, w e recommend to read
this manual and respect the simple instructions contained, this will protect you from accidents
and avoid damages to the equipment.
Keep it always available together w ith its enclosures,so that it can be consulted when necessary.
IMPORTANT
SOME ENCLOSURES CONTAINING INFORMATIONABOUT ACCESSORY PARTS OR
SAFETY MANUALS OF THE MANUFACTURER OF SUB PARTS OR SUBCOMPONENTS OF
DOA TOOLS, COULD HAVE BEEN SUPPLIEDTOGETHER WITHTHIS MANUAL.
THESE ENCLOSURES ARE AN INTEGRAL PART OF THE MANUAL AND THEY MUST BE
KEPT TOGETHER WITH THE MANUAL ITSELF.
BE CAREFUL WHEN YOU CONNECT THE TOOL TO AN HYDRAULIC CIRCUIT WHERE ARE
UNKNOWN HYDRAULIC MAXIMUM VALUES OF PRESSURE AND FLOW. FOR AVOIDING
ACCIDENTS AND DAMAGES TO THE EQUIPMENT, BE SURETHAT THEMAXIMUM VALUES
OF PRESSURE AND FLOW OF THE POWERING CIRCUIT ARE COMPATIBLE WITH THOSE
ONEOFTHETOOLITSELF.
NOTE
–
THE TEXT AND THE ILLUSTRATIONS IN THIS MANUAL ARE AN EXCLUSI
V
E
PROPERTY OF DOA S.R.L. THE PERSON WHO USES THE TEXT OR REPRODUCES,
EVEN PARTIALLY, ILLUSTRATIONS OR PARAGRAPHS FOR NON-AUTHORISED
PURPOSES CAN BELEGALLY LIABLE.
DATA, ILLUSTRATIONS AND CHARACTERISTICS OF THIS MANUAL ARE ONLY
INFORMATIVE AND NOT BENDING. DOA RESERVES THE RIGHT TO MAKE
MODIFICATIONS AT ANY TIME AND WITHOUT PREVIOUS NOTICE.

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SAFETY SYMBOLS
This manual contains safety warnings represented by symbols indicating three different
levels ofdanger:
This symbol indicates an operation or situation extremely
dangerous which can cause serious accidents or death if
proper precautions are not respected.
This symbol indicates a dangerous operation or situation
that can cause serious accidents or death.
This symbol warns about generic danger that can cause
accidents and damages to the equipment or the
properties.
This symbol indicates important information.
IMPORTANT
WHEN THE EFFECTS OF A CERTAIN ACTION ARE NOT EXACTLY KNOWN, REMIND
THAT EVEN THE SIMPLEST OPERATION MAYHIDE DANGERS.
IN CASE OF DOUBTS DO NOT RISK – DO NOT MAKE EXPERIMENTS!
ASKYOUR DOA DEALERORYOUR FOREMAN.

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DESCRIPTION OF THE PRODUCT
AH 15 is a tool designed to make the rotation, clock wise and counter clock w ise, of devises that
are normally rotated by hand.
The tool can develop an high rotation force that can be controlled by hand, in certain application is
needed to install on the tool an appropriate system to contrast the reaction force and maintain the
tool firm and steady for avoiding accidents. AH 15 is equipped with two valves that allow the easy
and quick regulation of the maximum torque and speed, the twist type control handle can dose the
speed and reverse the sense of rotation as needed.
The tool immediately stops rotation when operator releases the handle this guarantees the total
safety.
TYPICAL APPLICATIONS
AH 15 is used to rotate pipe drilling machines, open and close shutters of irrigation canals, lifting
and lowering rail road devises, for activating spindles and mixers, to turn military devises etc..
SPECIAL ACCESSORIES TO BE MADE ON REQUEST
On the AH15 shaft is possible to install different accessories like sockets, square drive sockets,
adaptors etc that allow to connect the toolw ith the various organs to rotate.
Some of these accessories have to be made on purpose, for more information on accessories
contact DOA.
STANDARD ACCESSORIES AVAILABLE ON REQUEST
Metal box for the transport and care of all parts and accessories.
Detachable assist handle that allow the ideal tool control w ith two hands.
TYPICAL POWERING MACHINES
Hydraulic power packs – mini excavators – trucks – all the vehicles equipped w ith a sufficient
hydraulic circuit.

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AH 15 TECHNICAL CHARACTERISTICS
GENERAL VIEW – MAIN COMPONENTS AND THEIR FUNCTIONS
1. HYDRAULIC“GEROTOR” MOTOR:The motor supplies a high torque with low
speed,on the frontface has two threaded holes thatallow the installation of anti
reactionsystems.
2. MOTORSHAFT: On the shaftis possible to install differentadaptors orsockets to
adaptthe tool with the various devise to turn.
3. VALVE FOR REGULATION OF SPEED / REVS: Itcan adjust themaximum speed
or revolution perminute as needed.
4. TWIST TYPE CONTROL HANDLE: It has 3 positions and works like the
accelerator ofthe motor bikes:
twistingit clock wise the tool turns clock wise – like screwing
twistingit counter clock wise the tool turns counter clock wise – like unscrewing
The handle is type “ dead man”thatmeans thatwhen the operator releases the handle the
tool immediatelystops rotation.
5. CONTROL BAR: Itholds the twisthandle and has an arm sufficientlylong to allow
an easycontrol.
6. VALVE FOR REGULATION OF TORQUE: It can adjustthemaximum torque as
needed.
7. VALVE BLOCK: In the block are contained the elements for the control,distribution
and regulation of the tool.

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AH 15 TECHNICAL CHARACTERISITCS
WEIGHT Kg. 6
HEIGHT cm 18 without hoses
WIDTH cm 7
LENGTH cm 43
Ø OF THESHAFT mm 16
ROTATION clock wise and counter clock wise
TORQUEmin – max 0 – 8 KGM ( 84 Nm ) @ 140 bar oil pressure
SPEED min –max 0 – 600 giri/min @ 30 L/min oil flow
No of revolutions @ 10 L/min 0 - 200
No of revolutions @ 20 L/MIN 0 - 400
No of revolutions @ 30 L/min 0 - 600
FLOW 10-34 l/min
IDEAL FLOW 30 l/min
PRESSURE max 150 bar
TOLERA BL E BAC K PRESSURE m ax 90 bar
EHTMA GROUP C – D
THE TOOL TORQUE IS PROPORTIONAL TO THE AVAILABLE HYDRAULIC PRESSURE , THE
FIGURES IN THE ABOVE CHART ARE REFERRED TO PRESSURE OF 140 BAR
HYDRAULIC CHARACTERISTICS
WEIGHT AND DIMENSIONS
PERFORMANCES

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GENERAL SAFETY NORMS
GENERAL SAFETY INSTRUCTIONS
THE FOLLOWING INSTRUCTIONS ARE GENERAL SAFETY RULES AND HAVE TO BE RESPECTED IN
EVERY WORKS WITH HAND TOOLS. WE RECOMMEND TO FOLLOW THEM CAREFULLY IN ORDER
TO AVOID ACCIDENTS AND DAMAGES TO THE EQUIPMENT AND THINGS.
•WEAR ALWAYS THE HARD-HELMET, SAFETY GOGGLES, GLOVES, SAFETY SHOES,
EAR PROTECTIONS AND, WHEN IT IS PRESCRIBED, A DUST MUSK.
•WEAR TIGHT-FITTING CLOTHES ANDAVOID OPERATINGWITHSHORTTROUSERS
ORT-SHIRTS, OR OTHER BARE PARTS OF THE BODY. PAY ATTENTION TO LONG
LOOSE HAIR, GATHER THEM TO PREVENT THEY GET IN CONTACT AND TRAPPED
IN MOVING PARTS.
•BEFORE OPERATING, PREPARE ALWAYS A WORKING PLAN THAT CONSIDERS
AND FORESEES PROBLEMS, INTERRUPTIONS ANDAVOIDS MOST OF ALL
DANGEROUS SITUATIONS. THIS LITTLE OPERA TION STRATEGY, GUARANTEES
SAFETY AND IMPROVES PRODUCTIVITY
•WHEN WORKING IN TRENCHES PAY THE MAXIMUMATTENTIONWHEN YOU
APPROACH THE TRENCH IN STEEP AND SLIPPERY POINTS FOR PREVENTING
FALLS ANDACCIDENTS.
•WORK ONLY IN GOOD PHYSICAL AND MENTAL CONDITIONS. ALWAYS PAY THE
MAXIMUMATTENTION!
•WHEN YOUOPERATE IN DIFFICULT POSITIONS, DO NOT REACHOUTAND NEVER
LEAN AGAINST THE TOOL. KEEP THE BALANCE ON YOUR LEGS.
•BESURE THAT THE EQUIPMENT IS IN PERFECT WORKING CONDITIONS, WITHOUT
OIL LEAKS.
•KEEP THE PROTECTION DEVICES ALWAYS IN GOOD CONDITIONS AND PRESERVE
THEREADABILITY OF THESAFETY STICKERS.
•DO NOT WORK ON UNSTABLEORADAPTED SUPPORTS (SUCHASOIL CANS,
BOXES, WHEELBARROWS, ETC.). IF YOU NEED TO WORK IN ELEVATED
POSITIONS, USE ONLY STABLEAND SAFESUPPORTS APPROVED BY THE LOCAL
SAFETY RULES.
•THE WORKING AREA MUST BE EXAMINED A ND WELL-KNOWN. IF YOU WORK
ALONG ROADS, MAKEWELL VISIBLEYOUR POSITIONAND WARN THETRAFFICBY
THEUSE OFSIGNALS, FLASHINGLIGHTS, OR OTHER PRESCRIBED ROAD SIGNS.
•WORK ONLY IF THE EQUIPMENT ENGINES AREOUTSIDE OR IN A WELL
VENTILATED POINT. THE INHALATION OF EXHAUST GAS CA N BE FATAL. THE
WATER IS AN ELECTRICITY CONDUCTOR, THE CONTACT OF THEWATER WITH
ELECTRIC LINES CAN CAUSE SERIOUS ACCIDENTS AND EVEN DEATH.

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•PAY THEMAXIMUMATTENTIONWHENYOU WORK NEAR ENERGIZED ELECTRIC
LINES THAT CANBE BURIED, WALLEDOR HIDDEN. BEVERY CAREFUL ALSO TO
GAS AND WATER PIPES, TELEPHONE LINES OR OTHER BURIED CABLES OR
DUCTS.
•THE WORKING AREA MUST BE FREE FROM OBJECTS THAT MAY FALL, GET
SPOILED, CATCH FIRE, MAKE TRIP UP OR MAKE THE OPERATION DIFFICULT OR
DANGEROUS.
•WARN AND MOVE AWAY IMPRUDENT BYSTANDERS OR OTHER PEOPLE NOT
AUTHORIZED OR INVOLVEDWITH THEJOB.
•IF YOU WORK IN NARROW OR CLOSED ROOMS ALWAYS PLAN AN ESCAPE WAY
OUT THAT MUST BEKEPT FREE.
•MAKE SURE THAT THE DEVISE THAT YOU ARE TURNING OR THE PIPE TO DRILL
OR THE OPERATION POINT IS THE RIGHT ONE AND THAT THERE ARE THE
PROPER AUTHORIZATIONSOF THEOWNERSBEFORESTARTINGTHEWORKS.
•BEFOREWORKING ALWAYSFORESEE THE EFFECT OF THEOPERATION YOU ARE
DOING AND TAKE OPPORTUNE DEFENCES AND COUNTER MEASURES FOR
PREVENTING POSSIBLE DAMAGES OR DANGEROUS SITUATIONS.
•BEFORE USING THE EQUIPMENT MAKE SURE AND PREVENT VEHICLES,
MACHINES OR PEOPLE FROM PASSING ON THE EQUIPMENT HOSES OR
HYDRAULIC CONNECTIONS
•ALWAYS CONNECT TOOLS TO THE OPERATING MACHINE OR POWER PACK
BEFORE STARTING THE ENGINE.
•WHEN WORKING IN NOISY AMBIENT , BE SURE THAT YOUR VOICE MESSAGE OR
WARNING OR OTHER SIGNAL GIVEN TO YOUR COLLEAGUES IT HAS REALLY BEEN
UNDERSTOOD AND LISTEN . DO NOT TRUST TO ORAL MESSAGE GIVEN WHEN
ENGINES OR OTHER NOISY EQUIPMENT ARE IN USE. GOOD COMMUNICATION
MEANS SAFETY
•DO NOT INSPECT OR DISASSEMBLE THE TOOL WITH THE HYDRAULIC HOSES
CONNECTED TO TOOL
•KEEP IN A SAFE DRY PLACE THIS MANUAL AND ITS ENCLOSURES, SO THEY CAN
BEALWAYSAVAILABLEFOR FUTURE CONSULTATIONS.

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USE OF THE TOOL
WHAT NOT TO DO
THE FOLLOWING RULES ARE GIVEN FOR DESCRIBING THE MORE COMMON ERRORS OR
IMPROPER AND DANGEROUS USE OF THE TOOL.
SINCE IT IS IMPOSSIBLE TO FORESEE ANY ABUSE OR DANGEROUS SITUATIONS, THE RULES
ARE NOT SUFFICIENT TO GUARANTEE THE TOTAL SAFETY.
IT’S RECOMMENDED TO USE ALWAYS THE MAXIMUM CAUTION IN EVERY CIRCUMSTANCES.
IN CASE OF DOUBT DO NOT RISK, BUT ASK YOUR FOREMAN.
WHAT NOT TO DO
•DO NOT USE THETOOL IFTHERE COULD BETHE POSSIBILITY OF GETTING IN CONTACT WITH
ENERGIZED ELECTRIC LINES ORPRESSURIZEDPIPES.
•DO NOT START OR USE THE POWER PACK AND TOOL IN CLOSED ROOMS WITHOUT
VENTILATION , BE CAREFUL IF THERE ARE STRANGE ODOURS, THEY MAY BE DANGEROUS
GASES OR EXHALATIONS.
•DO NOT USE TOOL IF IT IS DAMAGED, IF THERE ARE OIL LEAKS OR SOME PARTS ARE
MISSING OR WRONGLY INSTALLED.
•IF THE TOOL IS RE USED AFTER A LONG PERIOD, OR IF IT HAS BEEN USED BY OTHERS, DO
NOT USE IT IF YOU HAVE NOT CONTROLLED THE TORQUE AND THE SPEED SETTING, THE
TOOL COULDBE WRONGLYREGULATED CREATING DANGEROUS SITUATIONS.
•DO NOT START THE TOOL CONNECTED TO POWER PACKS OR OTHER MACHINES WHOSE
MAXIMUM VALUES OF PRESSURE AND FLOW ARE NOT KNOWN. IF THE TOOL IS STARTED
WITH FLOWS HIGHER THAN 34 l/min AND PRESSURE HIGHER THAN 150 bar,THIS CAN CAUSE
THEBREAKOFTHE EQUIPMENT AND EVEN ACCIDENTS.
•DO NOT ALLOW THE USE OF THE EQUIPMENT TO PEOPLE THAT ARE NOT TRAINED OR WHO
HAVE NOT READ THIS MANUAL.
•DO NOT WORK IF YOU ARE NOT IN PERFECT PHYSICAL AND MENTAL CONDITIONS. DO NOT
KEEPTHE HEADTOO CLOSETOTOOL WHEN WORKING
•DO NOT WORK ALONE WHEN IT IS POSSIBLE, MAKE SURETHAT SOMEBODY KNOWS WHERE
YOU AREAND WHAT YOU ARE DOING.
•DO NOT CARRY OUT REPAIRS, INSPECTIONS OR CLEANING OF THE PUMP WITH THE
HYDRAULIC HOSES CONNECTED OR EVEN WORSE WITHTHE PUMP WORKING.
•DO NOT USE AND DISCARD IMMEDIATELY BADLY CONNECTED TO THE METAL ENDS.
IMPROVISED FASTENINGS WITH WIRES OR CLAMPS SHOULD BE AVOIDED FOR PREVENTING
ACCIDENTAL REMOVAL OF THE DISCHARGE HOSE WITH CONSEQUENT DANGEROUS
SITUATIONS.

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•DO NOT WORK, AND IF IT IS NECESSARY PAY THE MAXIMUM ATTENTION, WHEN YOU WORK
ON STEEP AND SLIPPERY BANKS, WHICH COULD CAUSE VERY DANGEROUS FALLS INTOTHE
WATER.
•DO NOT PULL THETOOL BYTHE HOSES ALWAYS GRAB IT INTHE METALPART .
•ONCE THE ROTATION OPERATION IS FINISH AND THE DEVISE HAS ARRIVED TO THE END OF
ITS ACTION , DONOT INSIST AGAINST THEEND OF THE RACE. FORCING THE DEVISE AGAINST
THE BOTTOM CAN CAUSE DAMAGES TO THE EQUIPMENT
NEVER USE THE TOOL IF :
THESOCKETS OROTHER SHAFT ADAPTORS ARE WRONGLY INSTALLED ORLOOSE OR
AREADAPTED ORIMPROVISED OR NOT ADEQUATETO THE OPERATIONTO BE DONE.
-
THESPRING RETURN OF THE HANDLEANDTHETWIST HANDLE ITSELFARE NOT IN
PERFECT EFFICIENCY AND OPERATIVE.
-
IFYOUARE NOT EXACTLY AWAREAND SECUREABOUT THE RESULT OF THE ACTION
YOU ARE DOING WITH THE TOOL.
IFTHE REACTION DEVISES THAT WERE INSTALLED HAVE BEEN REMOVED.
AH 15 IS A TOOL THAT CAN GENERATE A HIGH TORQUE THAT CAN BE CONTROLLED AND
CONTRASTED MANUALLY.
FOR THE MAXIMUM SAFETY AND FOR AVOIDING ACCIDENTS IT IS BETTER TO INSTALL ON THE
TOOL AN ANTI REACTION DEVISE THATBLOCKS THE TOOL AND PREVENTITS ROTATION.
THESE PARTS MUSTBE MADE ON PURPOSE AS THEY HAVE TO BE ADEQUATE TO THE PARTTO
TURN.
DO NOT USE THE TOOL AND STOP IMMEDIATELY THE OPERATIONS IF THE SPRING RETURN OF
THE HANDLE IS BROKEN OR IF IT IS NOT IN PERFECT EFFICIENCY.
CONTACT DOA FOR MORE INFORMATION IN THIS RESPECT.
DO NOT USE THE TOOL WITH SOCKETS OR SQUARE DRIVES THATARE NOTPERFECTLY MADE
FOR THE HUB TO TURN.
THE USE OF ADAPTED SOCKETS OR DRIVE SQUARES CAN CAUSE ACCIDENTS AND DAMAGE
THE PARTS TO BE TURNED.

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BEFORE WORKING
CONNECTION OFTHETOOL TO THE POWERPACK OROTHER HYDRAULIC SOURCE
1. Lay down the flexible hydraulic hoses avoiding the contact of the couplers with
the mud or dirt.
2. Lay the tool on a clean surface. Make sure that the tool is in perfect condition
and its accessories are efficientand well installed.
3. First connect the flexible hoses to the power pack whose engine must be OFF.
Connect the female coupler of the hose to the male coupler of the power pack,
then connectthe other hose.
IF CORRECTLY INSTALLED, THE MALE COUPLER OF THE POWER PACK IS THE ONE
CORRESPONDING TO THE PRESSURE LINE, WHERE THE OIL “GETS OUT” FROM THE POWER
PACK, THE CORRECT SEQUENCE OF COUPLERS INSTALLATION DEPENDS ON THE POSITIONING
OF THE FIRST MALE COUPLER .
4. Now connect theflexible hose to the tool, connecting first the return hose corresponding to the
hole with a Tor OUT symbol punched on the tool.
5. The hydraulic connection is now completed.
6. Start the pow er pack (or other hydraulic source ) leaving it at idle for a few minutes allowing
engine and oil warmup.
7. Put the flow lever of the power pack to ON position making circulate the oil. Leave the
equipment in this condition for a few minutes w ithout using the tool and warming engine and
the hydraulic oil. The tool is now ready to use. Check that there are not hydraulic oil leaks.

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IF A FLEXIBLE HOSE FULL OF OIL REMAINS UNDER THE SUN, THE OIL EXPANSION DUE TO THE
HEAT CAN CAUSE A PRESSURE INCREASE AND PREVENT THE CONNECTION OF THE QUICK
COUPLERS. IN THIS CASE THE HOSES SHOULD BE DEPRESSURIZED UNSCREWING THE QUICK
COUPLERS DRIPPING SOME OIL DROPS.
IF THE AMBIENT TEMPERATURE IS VERY COLD, THE HEATING OPERATION SHOULD BE
PROLONGED UNTIL THE HYDRAULIC OIL TANK WILL BE WARM TOUCHING IT. DO NOT WORK
IMMEDIATELY IF THE OIL IS COLD. AT LOW TEMPERATURES THE OIL CAN BE VERY VISCOUS
(HARD) AND CAN CAUSE HARMFUL INCREASES IN THE BACK PRESSURE AND DIFFICULT
SUCTION OF THE PUMP ( CAVITATION PHENOMENON ).
USE OF THE TOOL
AH 15 IS A TOOL THAT DEVELOPS A HIGH ROTATION FORCE THAT ALLOWS TO ELIMINATE THE
FATIGUE TO MAKE THE OPERATIONS BY HAND. FOR ITS FUNCTION THE TOOL MUSTHAVE HIGH
TORQUE FORCE , THIS FORCE CAN BE ADJUSTED IN BOTH SPEED AND TORQUE THESE
VALUES SHOULD BE ADEQUATE AND JUST A LITTLE HIGHER TO THE WORK TO BE DONE . ITIS
IMPORTANT THAT THE OPERATOR EVALUATE THE TYPE OF OPERATION TO DO AND
CONSEQUENTLY EVALUATE THE NECESSARY SPEED AND TORQUE AND WHEN THE OPERATION
CAN COMMENCE OR STOP IT. NOT TO DO SO MAY RESULT IN DAMAGE TO THE EQUIPMENT AND
CAUSE ACCIDENTS.
THE MAJOR AND MORE COMMON RISKS DERIVING FROM IMPROPER USES ARE
THE FOLLOWING:
TOO HIGH FORCE / TORQUE APPLIED OR NECESSARY
RISK:
NECESSITY TO CONTROL AND CONTRAST THE REACTION MANUALLY OR BY THE
USE OF ANTI REACTION DEVISES.
COUNTERBLOW / RECOIL ON THE OPERATORS ARM.
WHEN TO ROTATION OPERATION HAS ARRIVED TO THE END THE RISK IS THAT
TOFORCE THE END OF THE RACE OFDEVISES CAN CAUSE DAMAGES.

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ROTATION SPEED TOO HIGH
RISK:
HIGH SPEED OR EXCESS OF REVOLUTIONS CAN CAUSE PREMATURE WEAR OF
THE DRILLING BITS USED WITH THE PIPE DRILLING MACHINES.
HIGH SPEED COULD SLAM VIOLENTLYTHE DEVISES AT THE END OF THE RACE.
OPERATIONS
READ AND OBSERVE THE INSTRUCTIONS OF THE PREVIOUS PARAGRAPHS.
•GENERAL SAFETY NORMS
•WHAT NOT TO DO
AH 15 IS SUPPLIED WITHOUT THE ADAPTOR SOCKET, WILL BE OBVIOUSLY NECESSARY TO
INSTALL AN OPPORTUNE ADAPTOR SOCKET THAT CONNECT THE TOOL SHAFT WITH THE HUB
OF THE ORGAN TO BE TURNED.
IN CASE OF DOUBT OR FOR MORE INFORMATION CONTACT DOA.
1. AFTER HAVING STARTED THE POWER PACK AND CONNECTED THE OIL
HOSES TO TOOL, WITHOUT ENGAGING THE TOOL MAKE SOME FREE
ROTATION IN ORDER TO GET FAMILIAR WITH TURNING EFFECT
CONSEQUENT TO THE HANDLE TWISTING OPERATIONS.
TWISTING THE HANDLE COUNTER CLOCK WISE ( LIKE ACCELERATING A MOTOR
BIKE) THE TOOL WILL TURN THE DEVISE CLOCK WISE
LIKE SCREWING ( just like the action of a electric drill )
TWISTING THE HANDLE CLOCK WISE ( LIKE DECELERATING THE MOTOR BIKE )
THE TOOLWILL TURN THE DEVISE COUNTER CLOCK WISE
LIKE UNSCREWING
2. AFTER GETTING FAMILIAR WITH THE SENSE OF ROTATION, POSITION THE
TOOL ON THE HUB OF THE DEVISE TO BE ROTATED
3. AFTER HAVING SECURELY POSITIONED THE TOOL ON THE DEVISE ( IF
NECESSARY USING AN OPPORTUNE COUNTER REACTION DEVISE )
SLOWLY TWIST THE HANDLE.
TWIST HANDLE CLOCK WISE TO SCREW THE ORGAN
TWIST HANDLE COUNTER CLOCK WISE TO UNSCREW THE ORGAN

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IF A PIPE DRILLING MACHINE IS USED THE SENSE OF ROTATION IS JUST ONE , IN THIS
APPLICATION THE HANDLE SHOULD NORMALLY BE TURNED COUNTER CLOCK WISE.
4 ROTATE THE DEVISE AS NEEDED OBTAINING THE ACTION EFFECT.
ONCE THE ROTATION HAS BEEN COMPLETED DO NOTINSISTUSELESSLY ON THE END , THIS TO
AVOID STRESS TO THE TOOL AND TO THE DEVISE JUST TURNED.
THE HYDRAULIC MOTOR CAN GET HOT DURING PROLONGED OPERATIONS, AVOID CONTACTS
OF THE MOTOR WITH BARE HANDS TO PREVENTBURNS.
5 IF THE TOOL HAS NO SUFFICIENT TURNING FORCE WILL BE NECESSARY
TO ADJUST FORCE, OR SPEED, FOLLOWING THE INSTRUCTIONS AS
DESCRIBED IN THE FOLLOWINGPARAGRAPH.
REGULATION OF THE ROTATION FORCE – TORQUE
ATHE VALVE THAT CONTROLS THE FORCE IS A HYDRAULIC RELIEF VALVE
INTEGRATED IN THE VALVE BODY OF THE TOOL.
BUNSCREWTHENUTTHATBLOCKS THE VALVE REGULATION SCREW.
C TURN THE CENTRAL SCREW
CLOCK WISETO INCREASE FORCE/TORQUE
COUNTER CLOCK WISE TO DECREASE FORCE/TORQUE
D AFTER HAVING DONE MORE ATTEMPT IN ORDER TO OBTAIN THE NECESSARY
FORCE , BLOCK THE LOCKING NUT OF THE VALVE.
THE MOMENT WHERE THE PIPE DRILLING BITS IS GETTING OUT OF THE MATERIAL OR WHEN
THE DEVISE HAS ARRIVED TO THE END , THIS MOMENT CORRESPOND TO THE MAXIMUM
REACTION - RECOIL OF THE TOOL, BE CAREFUL NOT TO GET KICKED AND TO AVOID DAMAGES
AND ACCIDENTS.

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REGULATION OF SPEED – N° OF REVOLUTIONS
A THE VALVE THAT CONTROLS THE SPEED IS A CARTRIDGE INTEGRATED IN THE
VALVE BODY OF THE TOOL .
BUNSCREWTHENUTTHATBLOCKS THE VALVE REGULATION SCREW.
C TURN THE CENTRAL SCREW
CLOCKWISETO REDUCE SPEED
COUNTER CLOCK WISE TO INCREASE SPEED
D AFTER HAVING DONE SOME TRAILS FOR OBTAINING THE RIGHT SPEED,
BLOCK THE LOCKING NUT OF THE VALVE.
END OF OPERATIONS
1. LAY THE TOOL LIMITING CONTACTS WITH THE MUD AND DIRT, IF IT IS POSSIBLE.
2. PUT THE FLOW LEVER OF THE POWER PACK IN OFF POSITION, THIS WILL TAKE
AWAY FLOW TOTOOL.
3. PUT THE PA CK ENGINE OFF.
4. DISCONNECT THE TOOL FROM THE OIL FLEXIBLE HOSE RELEASING FIRST THE
PRESSURE HOSE CORRESPONDING TO THE HOLE WITH P – IN PUNCHED ON THE
TOOL. THIS OPERATION WILL PREVENT ACCIDENTAL PRESSURE TRAPPING INSIDE
THE TOOL.
5. DISCONNECT THE FLEXIBLE OIL HOSE FROM THE POWER PACK
6. ROLL UP THE OIL FLEXIBLE HOSE IN CIRCLES OF ABOUT 60 CM OF DIAMETER,
CONNECTING THE QUICK COUPLERS AT THE EXTREMITIES IN THE “HEAD/TAIL” WAY.
THIS OPERATION WILL PROTECT THE OIL COUPLERS AGAINST IMPACTS OR
SCRAPING AND WILL ALSO HELP IN KEEPING THE HOSEWELL ROLLED UP.
7. DETACH THE ACCESSORY FROM THE TOOL IF NEEDED, CONTROL THEIR STATE AND
EFFICIENCY AND DISCARD THOSE DA MAGED TO AVOID THAT CA N BE REUSED.
8. STORE THE EQUIPMENT IN A SAFE PLACE REPAIRED FROM BUMPS AND
ATMOSPHERIC AGENTS.
9. IF THE EQUIPMENT SHOULD BE TRANSPORTED ON VEHICLES OR TRUCKS, TAKE
CARE THAT IT IS LOADED AND BLOCKED IN A PROPER WAY FOR AVOIDING TILTING
AND DA MAGES.

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MAINTENANCE AND CARE OF THE PRODUCT
CLEANING OF THE TOOL
THE CLEANING IS VERY IMPORTANT FOR THE GOOD FUNCTIONING OF THE EQUIPMENT. A
CLEAN PRODUCT WILL IMMEDIATELY ALLOW TO FIND OIL LEAKS OR CAUSES OF
MALFUNCTIONING. A CLEAN TOOL IS ALSO MORE COMFORTABLE FOR THE OPERATOR AND
GUARANTEES A FIRM GRIP.
CLEANI NG WIT H CLOT HS OR PAPER
•THETOOL CANBE CLEANED WITH A DAMP RAG,USING A BRUSH WITH GASOHOLOR AN AIR
GUN FOR ELIMINATINGALL TRACES OF DIRT AND OIL.
•CLEAN IN PARTICULARTHE RECESSEDPOINTS AND CAVITIES ANDTHE CONNECTION
SURFACE OFTHE QUICK COUPLERS.
•WITH THE TOOL PERFECTLY DRY, SPRAY A PROTECTIVE-DEWATERING PRODUCT (CRC-OR
WD40) ON THE QUICK COUPLERS.
•DRY UP COMPLETELY THETOOL HANDLE TO GUARANTEE A FIRM GRIP.
PERIODICAL CONTROLS
•EVERY TIMETHE EQUIPMENT IS USED :
1. CONTROL THAT THE TWIST HANDLE AND ITS RETURN SPRING, THE SCREWS, THA
VALVES, AND ALL COMPONENTS ARE WELL INSTALLED AND EFFICIENT, IN CASE
SOMETHING IS DAMAGED IMMEDIATELY DISCARD THE APRT OR INFORM YOUR FOREMAN
SOTHE PARTS WILL NOT BE REUSED.
2. CLEANTHETOOL AND ITS HOSES ANDTHE REST OFTHE EQUIPMENT.
3. PERFORM A GENERAL INSPECTIONOF ALL THEEQUIPMENT.
MAINTENANCE OF THE ACCESSORIES
A CORRECT MAINTENANCE OF THE ACCESSORIES LIKE ADAPTORS, SOCKETS, SHAFT OR
OTHER COUPLING DEVISES PRESERVE THE EFFICIENCY AND GUARANTEES THE SAFETY AND
THE BESTPERFORMANCES ACCESSORIES NOTWELL PRESERVED OR IN BAD CONDITIONS MAY
MAKE THE OPERATION DIFFICULT AND CAN ALSO CAUSE ACCIDENTS OR DANGEROUS
SITUATIONS.
IN ORDER TO OBTAIN THE BEST PERFORMANCE IT’S IMPORTANT TO USE THE RIGHT
ACCESSORY. REMIND THAT A WRONG OR INADEQUATE ACCESSORY CAN CAUSE ACCIDENTS
AND MAKE THE OPERATIONS DIFFICULT.

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ACCESSORIES MUSTBE OFTEN INSPECTED WITH CARE ELIMINATING PROMPTLY THOSE WHICH
ARE FAULTY OR NON MAINTAINABLE, ALSO FOR AVOIDING THAT OTHER PERSONS MAY
INCAUTIOUSLY USE THEM AGAIN.
MAINTENANCE OFTHE OIL FLEXIBLE HOSE
INSPECTION OF THE HOSE
•Lay the flexible hoses on the floor and control if there are oil leaks and the hose surfaces are
integral without peeled sections showing metallic braid with broken steelwires.
•the presence of little sections of wire braid can be tolerated only if the wires are not broken and
still braided.
•Control the pressed bushing at the extremity of the hydraulic hoses and discard immediately
hoses showing bending, squeezing, or deformations.
•Check that the quick couplers are w ell dry,without oil leaks and that the knurled bushing on the
female quick coupler is intact and can slide freely during the connections. The male coupler
should be intact, without dents and deformations. If you try to force the connection of a
damaged male coupler, this will damage irremediably also the female.
•If the oil flexible hose and quick couplers show oil leaks, even if the couplers arewell screwed
into the hose fittings, they should be immediately substituted w ith new parts.
•Replace hoses that show squeezing, unnatural bending, deformations, swellings, etc…
CAREANDMAINTENANCE OF THE OIL FLEXIBLE HOSES
The flexible hose can be cleaned with a hydro cleaner or pressurewasher after having laid it on a
clean surface. Clean with thewater jet in particular near the area of the clips w here the dirt is going
to deposit.
Move the hoses andwashcompletely in particular the quick couplers.
Blow the hoses with an air gun in particular in the area of the quick couplers.
Roll up the flexible hoses in a roll having a diameter of about 60-70 cm and connect the quick
couplers at the ends in the “head/tail” w ay. This operation will protect them against impacts or
scraping.
Place the hose in a safe and dry place, protected frombumps and weather.
IF A FLEXIBLE HOSE FULL OF OIL REMAINS UNDER THE SUN, THE OIL EXPANSION DUE TO THE
HEAT CAN CAUSE A PRESSURE INCREASE AND PREVENT THE CONNECTION OF THE QUICK
COUPLERS. TO DECREASE PRESSURE, LOOSEN THE QUICK COUPLERS, DRIPPING SOME OIL
DROPS DE-PRESSURIZING THE HOSE.

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THE FLEXIBLE HOSE ALWAYS REMAINS FULL OF OILTHAT, DEPENDING ON THE HOSE LENGTH,
CAN HAVE A RELEVANT VOLUME. IF YOU CHANGE THE HYDRAULIC OIL IN THE POWER PACK, IT
IS RECOMMENDED TO REPLACE ALSO THE OIL IN THE HOSES.
THIS WILL ASSURE A FULL REPLACEMENT AND AVOID THE CONTAMINATION OF THE NEW OIL.
DISPOSAL AND SCRAPING
THE HYDRAULIC OIL – BATTERIES OF THE POWER PACKS
HYDRAULIC OIL FILTERS – ACID OF THE BATTERIES
ENGINE OIL – FLEXIBLE HOSES FULL OF OIL
ENGINE OIL FILTERS – ALL FUELS
ARE DANGEROUS WASTES
THAT MUST BE DISPOSED ACCORDING TO THELOCAL REGULATION OF YOUR
COUNTRY OR MUNICIPALITY
DON’T THROW AWAY THE LIQUIDS AND MATERIALS OF THE ABOVE-MENTIONED LIST. THE
INFRINGEMENT OF THE RULES REGARDING THE DISPOSAL OF DANGEROUS WASTES IMPLIES
LEGAL RESPONSIBILITIES.
Also the storing and charging/discharging management of the materials of the above-mentioned
list have to be run according to the specific regulation.
For information about the handling and disposal of the dangerous wastes contact the
ENVIRONMENT department of your municipality.
Except for the liquids and materials of the previous list, the other components of the products
manufactured by DOA are fabricatedwith recyclable materials that can be stored, disposed and
scrappedwithout particular cautions.
MATERIALS ANDCOMPONENTS USED BY DOA DO NOT CONTAINASBESTOS OROTHER
TOXIC EL EM ENTS THAT REQUI RE SP ECIAL CA UTION FOR T HEI R USE.

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REPAIR
DISASSEMBLY – INSPECTION OF THE PARTS – REASSEMBLY
DOA HYDRAULIC TOOLS ARE PROFESSIONAL PRODUCTS THAT SHOULD BE REPAIRED ONLY BY
QUALIFIED PERSONNEL.
THE TOOL REPAIR MAY REQUIRE TECHNICAL LITERATURE AND INSTRUMENTS FOR THE
CONTROL OF THE HYDRAULIC VALUES AND AN ADEQUATE HYDRAULIC SOURCE NECESSARY
FOR CARRYING OUT THE TOOL FUNCTIONING TESTS.
IT IS THEREFORE ADVISABLE NOT TO START THE COMPLETE DISASSEMBLY OF THE PRODUCT
IF YOU ARE NOT A TECHNICIAN AND IF PROFESSIONAL TOOLS AND EQUIPMENT ARE NOT
AVAILABLE.
REPARATION OF PRODUCTS UNDER WARRANTY
IF THE PRODUCTS ARE STILL UNDER WARRANTY, THE REPAIRS MUST BE CARRIED OUT
ONLY BY DOA AUTHORIZED SERVICE AGENTS OTHERWISE THE WARRANTY WILL BE
AUTOMATICALLY NULLIFIED.
GENERAL INFORMATION
Althoughwe recommend that the repairs have to be carried out only by authorized DOA service
agents, some minor repairs can be carried out also by other engineers, in this case follow these
instructions:
BEFORE DISASSEMBLY
•Clean accurately the product and remove any trace of dirt.
•Keep available a clean w orking surface, paper, rags, tools, an air gun, a rubber hammer, a
brass punch, a vicewith soft protection for the jaws, a clean container for collecting the tool oil.
•Keep available an exploded view of the tool and part list.
•Consider that when the tool is completely disassembled, it’s recommended to replace all
exposed seals.
OFTEN THE CAUSE OF FAILURE IS NOTDUE TO PROBLEMS OF THE HYDRAULIC TOOLS, BUT TO
PROBLEMS OF THE HYDRAULIC CIRCUITS WHICH COULD NOT HAVE PRESSURE AND FLOW
CORRECT VALUES. IF YOU SUPPOSE THIS, DO NOT DISASSEMBLE THE TOOL, DO NOT MAKE
EXPERIMENTS AND CONTACT THE NEAREST AUTHORIZED DOA CENTRE.