GMC 3G12V Instruction Manual Download Page 13

13

Torque adjustment/hammer selection collar

By rotating the torque adjustment/hammer selection collar 

(2) behind the chuck, it is possible to adjust the torque to 

each of twenty settings, or select hammer action or the  

drill setting.
The range of twenty torque settings allows better control 

when using the drill as a screwdriver as it prevents over-

tightening of the screws.
The numbers circling the collar are used to indicate the  

level of torque. The higher number on the collar, the  

higher torque and the larger the fastener which can be 

driven. To select any of the numbers, rotate the collar  

(2) until the desired number aligns with the arrow head 

indicator on the housing.

3 Speed gearbox 

The 3 Speed Gearbox allows 

you to select a gear with the 

optimum speed and torque to 

suit the application.
To select the first gear (low 

speed, high torque setting), turn 

the tool off and wait until it stops. 

Push the gear selector (9) back, 

away from the chuck, so the number 1 is displayed. 
To select the second gear (medium speed, medium torque 

setting),  turn the tool off and wait till it stops. Slide the  

gear selector forward towards the chuck, so the number 2 

is displayed.
To select the third gear (high speed, low torque setting),  

turn the tool off and wait until it stops. Slide the gear 

selector (9) to the middle position, so the number 3  

is displayed.

Note.

 Do not change gears when the tool is running.

Screw driver bit storage

A convenient storage area (10) with retaining clip, for 

screwdriver bits is provided on the left side of the tool.

Chuck replacement

Chuck removal
Always wear eye protection. 

Turn the torque adjustment collar (2) to the “drill” position 

and first gear, on the gear shift (9). Tighten the chuck 

around the shorter end of a hex key (not supplied) of 5mm 

or greater size. Using a wooden mallet or similar object, 

strike the longer end in the clockwise direction. This will 

loosen the screw inside the chuck.

1.  Open chuck jaws fully.
2.  Insert a 5mm hex key into front of chuck between jaws to 

engage screw head. Remove screw by turning clockwise. 

3.  Place the hex key in chuck and 

tighten. Using a wooden mallet or 

similar object, strike key sharply 

in the anti-clockwise direction. 

This will loosen the chuck so that 

it can be unscrewed by hand.

Chuck installation

1.  Screw the chuck on 

by hand as far as 
it will go and insert 

screw (LH thread).

2.  Tighten the chuck 

around the shorter 

end of hex key (not 

supplied) strike the 

longer end in the 

clockwise direction with  

a wooden mallet.

3. Remove the hex key and open the jaws fully. Tighten the 

screw in the centre of the chuck firmly, with the hex key in 

an anti-clockwise direction.  

Summary of Contents for 3G12V

Page 1: ...1 CORDLESS 3 GEAR HAMMER DRILL 3G12V 3G144V 3G18V 3G18VM 3G24V 3G24VM INSTRUCTION MANUAL...

Page 2: ...ction manual Please ensure that you store your receipt in a safe place Conditions apply to the above warranty For full details of the warranty terms and conditions please refer to our website www gmco...

Page 3: ...You will find your new tool easy and safe to operate and with proper care it will give you many years of dependable service CAUTION Carefully read through this entire Instruction Manual before using y...

Page 4: ...ions 20 positions 20 positions Drill chuck capacity 10mm Keyless 10mm Keyless 13mm Keyless 13mm Keyless Weight 2 4kg 2 5kg 2 9kg 3 2kg Maximum torque 17 65 Nm 20 6 Nm 36 3 Nm 45 15 Nm Maximum drill no...

Page 5: ...e reduces the risk of electric shock 3 Personal safety a Stay alert watch what you are doing and use common sense when operating a power tool Do not use a power tool while you are tired or under the i...

Page 6: ...d battery packs Use of any other battery packs may create a risk of injury and fire d When battery pack is not in use keep it away from other metal objects like paper clips coins keys nails screws or...

Page 7: ...design Damage to the lungs if an effective dust mask is not worn Damage to hearing if effective ear defenders are not worn Additional safety instructions for the charger Before using the charger read...

Page 8: ...a low charge condition You should charge the battery pack fully before use To ensure the longest battery life and best battery performance always charge the battery when the air temperature is between...

Page 9: ...ingle sleeve keyless chuck 2 Torque adjustment hammer selection collar 3 Trigger with variable speed control 4 Forward reverse control not shown 5 Adjustable side handle 6 Battery pack release buttons...

Page 10: ...locked OFF position when installing and removing bits It is also recommended to remove the battery pack to avoid unintentional starting 1 Open the chuck jaws by firmly holding the chuck housing and ro...

Page 11: ...e buttons 6 Depending on room temperature line voltage and existing charge level initial battery charging may take longer than one hour Disconnect charger from power source when not in use To obtain t...

Page 12: ...of the tool To select reverse depress the control 4 to the right side of the tool Drilling uses the forward mode The reverse mode is intended for the removal of screws The centre position of the contr...

Page 13: ...etting turn the tool off and wait until it stops Slide the gear selector 9 to the middle position so the number 3 is displayed Note Do not change gears when the tool is running Screw driver bit storag...

Page 14: ...n the mode selector to hammer mode then rotate the torque collar to the drill position Apply light pressure and medium speed for best results in brick Apply additional pressure and high speed for hard...

Page 15: ...ave all the information and parts ready to hand Do not throw used batteries into fire or water There is a danger of explosion Please hand in non working or used batteries or tools with built in batter...

Page 16: ...w Zealand 7am 7pm 7days a week AEST Please note that if repair or replacement is required you must provide a valid original purchase receipt You will need the following details at hand to log your ser...

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