Bosch Drills - Page 8 - Recent Questions, Troubleshooting & Support

You probably have a loose wire at one on the connections inside the unit. Open it up and have a look at all the connections, pay special attention to any push in connections as they tend to get loose over time.

Google.

Hi. When the 3 pins are opened all the way there is a phoenix type screw in the centre of the chick.(inside where the drillbit comes) There you can hold the chuck with hand or bench vise and unscrew the bolt holding it secure. spray some wd 40 on the base and gently wiggle it out.

Dear Fred, Please go to Replacement Parts in the link provided below. Too replace and remove your drill chuck on a cordless drill. How to Remove Drill Chuck Fare Well

There is supposed to be a Phillips head LH thread screw in the chuck. I have seen the screw head worn down so you can no longer get a screwdriver to work. We usually cut the chuck off with a metal chop saw just at the screw - thread what remains of the chuck off, which usually leaves 1/4" of the screw sticking out of the spindle - remove with vise grips. Its not an easy prospect when that happens.

All grease packed hammers require a certain period of time to warm up. Depending on the room temperature, this time may vary from approximately 15 seconds (90'F) to 2 minutes (32'F). A new hammer requires a break-in period before full performance is realized. This period may require up to 5 hours of operation. - depending on the time the device has already been in use it is recommended it should be regreased with a special gear lubricant, - perhaps the grease inside has been used up already, then a proper function of the device is not possible anymore and it has to be serviced.

They are filled with a special grease that comes from Bosch. It sounds like the impact bolt or the striker pin in the unit are not moving the way they should. These are the pieces that work together to create the hitting action. About all that can be done now is the unit has to be dismantled to get those to pieces moving again. Bosch makes what they call service packs for all thier hammers. They have all the o-rings and grease to get your hammer working again. A Bosch service center can supply you with the kit. Ask for P/N 1617000225, or they can take care of it for you.
Hope this helps

Yes you can. Make sure the transformer is rated for more power than the drill label states so that you don't burn up the transformer if you stick the drill bit. For instance, if the drill is rated for 5 amps at 230 volts you should get a 1500 watt transformer. 230 x 5= 1150 watts; the next common size up is 1500 watts. You don't want an 1200 watt if it is available. Transformers are also rated in KVA [Killovolt-amps] so the same transformer would be 1.5 KVA. Do the math for your drill and save future problems. If a transformer doesn't have a rating with real numbers, avoid it. There are lots of really cheap ones on the market that you will regret buying.

Take it back to the store

Go to Boch's website. Look for parts/diagrams or schematics. I believe they have instructions for brush replacement.

You probably have debris in the drill. Try blowing compressed air into the vent to see if it clears. If not, the drill will need to be opened and thoroghly cleaned.

needs brush cleaning when the brushes in the motor get a little dirty they tend to work intermittently

Download the instructions.