Are you thinking you are posting to Bosch Technical Services or Bosch Customer Complaints Department? We are FIXYA dot com.
It sounds like the battery is flat. Did you charge the battery? You can test the output voltage of the battery with a multimeter. You can't do anything else as that would void the warranty. Contact the company and claim on it. As it is only one month old you can ask the seller to change it or refund under the UK Sale of Goods Act 'not of merchantable quality'. I presume you are UK as you refer to the light as a 'torch'. I am British, but live in Canada.
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If you've replaced the variable speed unit in your Bosch 11318EVS SDS-max Demolition Hammer and the variable speed is still not working, there could be a few potential reasons for this issue. Here are some steps you can take to troubleshoot and address the problem:
Check Wiring Connections: Ensure that all wiring connections related to the variable speed control are properly connected and secure. Loose or damaged wires can disrupt the variable speed function.
Control Switch: The control switch itself could be faulty. Test the switch to make sure it's functioning as intended. Use a multimeter to check for continuity across the switch terminals in different speed settings.
Speed Control Potentiometer: The potentiometer, which is responsible for adjusting the variable speed, could be malfunctioning. Test the potentiometer with a multimeter to ensure it's changing resistance smoothly as you adjust the speed.
Electronic Control Board: The issue could be with the electronic control board that governs the variable speed function. Inspect the board for any signs of damage, such as burnt components or solder joints.
Brushes and Carbon Motor Contacts: Worn brushes or carbon motor contacts can affect the motor's performance and, consequently, the variable speed control. Check the condition of the brushes and motor contacts and replace them if necessary.
Power Supply and Voltage: Ensure that the tool is receiving the correct power supply and voltage. Incorrect power supply can affect the tool's overall performance.
Manufacturer's Support: If you've exhausted your troubleshooting efforts and the variable speed is still not working, it's advisable to contact Bosch customer support or a professional tool technician. They can provide more specific guidance based on the model and diagnose the issue accurately.
Professional Repair: If the issue is complex or involves internal components, it might be best to seek the assistance of a professional tool repair technician who has experience with Bosch power tools.
Remember that working with power tools and electrical components carries inherent risks. If you're not comfortable or experienced with tool repairs, it's recommended to seek professional assistance to ensure safety and prevent further damage to the tool.
It sounds like the issue with your Bosch bulldog extreme max hammer is likely due to worn out or damaged brushes. Here are the steps to remove and replace the brushes:
Unplug the hammer drill from the power source.
Remove the two screws on the top of the hammer drill handle with a screwdriver.
Lift off the top of the handle to expose the motor.
Locate the brush holders on either side of the motor.
Gently pull out the brush holder on one side of the motor.
Remove the brush from the holder by gently pulling it straight out.
Repeat for the other side of the motor.
Inspect the brushes for damage, wear, or discoloration. Blackening of the brushes is normal, but if they are excessively worn or damaged, they should be replaced.
Insert the new brushes into the brush holders, making sure they are properly seated.
Replace the brush holder on one side of the motor, then the other.
Reattach the top of the handle and replace the screws.
Regarding the digs in the motor surface, if they are not too deep and do not appear to affect the operation of the motor, they may not need to be addressed. However, if they are deep or if they appear to be affecting the motor's performance, it may be necessary to replace the motor.
It's important to note that working on power tools can be dangerous and should only be attempted by those with the necessary knowledge and experience. If you're unsure about any step in the process, it's best to seek the help of a professional.
Yes, the issue you're describing with the green power light coming on but the tool not functioning could be related to the trigger/switch. A malfunctioning trigger/switch can prevent the tool from operating properly. You may want to test the trigger/switch with a multimeter to see if it is functioning properly. If the trigger/switch is not the issue, it could be with the motor or power supply. In that case, I would recommend reaching out to a professional for repair
If it is 15 years old the batteries will need replacing. They were the worst of all the battery types and were replaced by Nickel Metal Hydride and now Lithium. NiCad batteries suffer with 'Memory Effect' and also lost power in storage. Find the YouTube channel of 'Big Clive', he just did a video on battery types, pros and cons.
https://www.youtube.com/c/Bigclive
IIRC, two terminals are the charging plus and minus and the other two are for the charger diagnostics.
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Drill is illustrated with a keyed chuck but in most cases if the drill is reversible there is a L/H thread machine screw accessible between the jaws when the chuck is wide open. This screw must be removed first.
A keyed chuck is removed by fitting the key and striking it sharply with a hammer in the normal direction of rotation.
Removing a keyless chuck can be difficult - the principle is the same but clamping something onto it tight enough to shock it with a hammer usually causes damage. The chuck of a reversible drill can clamped in a vice and the drill operated (carefully) in reverse sometimes does the trick.
Ideally what is needed is something like a few inches of 10mm hexagon bar bent at a right angle - locked into the chuck it would allow a hammer strike without causing damage.
My Bosch were great drills but the batteries were not. They died pretty fast and eventually wouldn't hold a charge. I assume since you say DRILLS in the plural that none of your drills are working and I would suspect the batteries and not the drill when you are talking about more than one drill dying at a time.
You did not say what kind of battery they are. Most lithium batteries will die if they go lower than a certain voltage. Going to zero volts will do that. That can happen when you leave the drill in the garage, where its not only hot which is not good, but not using the battery for long times it will drop in voltage until it stops working altogether. There are ways to try and repair the batteries but it is a dangerous thing to do if you do not understand. I can't share that with you because it can be dangerous. You may need to search Ebay for a new battery, and be sure to keep it charged and out of the heat of a garage. The battery charger should not indicate that the batteries charged, it should indicate and error. So your question did not give enough details for me to give you anymore information.
Hi. Take the battery out and clean the contacts. On both. Reinsert. Battery. Make sure that no lint gets stuck when cleaning. Blow air to dry. I use Isopropyl Alcohol. Chargers very rare go bad. Battery might be bad check with other charger. Good luck. LJ.
The least expensive is $95.95 on Amazon, the most expensive is $690.00, A lot of times, soaking stuff in gasoline works to fix you damaged tool. Be careful.
