Global Machinery Company GTX1850K, GTX2450K instruction manual Chuck replacement, Maintenance

Drilling wood

•For maximum performance, use high speed steel bits for wood drilling.

•Ensure that the mode selector is in normal drilling mode.

•Begin drilling at a very low speed to prevent the bit from slipping off the starting point. Increase the speed as the drill bites into the material.

•When drilling through holes, place a block of wood behind the work piece to prevent ragged or splintered edges on the back side of the hole.

•Warning. Never attempt to lock the trigger switch in the on position, do not lock the trigger on jobs where your hammer drill may need to be stopped suddenly.

All drilling operations

•Mark off the centre of the hole using a centre punch or nail.

Chuck replacement

Chuck removal

Always wear eye protection.

Turn the torque adjustment collar/hammer selection collar

(2)to the “drill” position and low gear, on the gear selector (14). 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.

Maintenance

•Store the tools, instruction manual and where necessary the accessories in the original packaging. In this way you will always have 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 batteries, to the environmentally-safe disposal unit at a municipal waste- disposal centre, or to your dealer.

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