my dewalt 18v drill is broken?

Gearbox is easily disassembled. Get some good quality gear grease and a good clear workspace. Grinding is probably a result of a badly machined cog or locating pin rather than built wrong. As for the not working I would test voltages with a multimeter and while you have it apart change brushes

mark
July 2014

http://www.mtmc.co.uk/product.aspx?ProductID=55970&source=googlebase

Guy
February 2012

boycot Black and Decker and get yourself a bosch or makita Drill.
They will last you a lifetime

Blackdeckerdewalt are rubish
October 2010

i have a dw988 cordless drill hammerdrill it will not run and trying to find a way to test to see if the switch is bad or there is something wrong with the motor can you tell me some way to test these components

lynn
September 2010

my drill wont go into hammer mode seems to be jammed runs through torks ok just will not engage into hammer

Ronnie Currie
April 2010

making a grinding noise on slow speed it is only 34 days old

Ian M Hamilton
September 2009

Hi Phil,
You can view the drawings on the Dewalt website:
https://www.2helpu.com/products/HomePage.aspx?BrandId=2&language=en-GB&country=GB

They are pretty straightforward to repair, depending on the model.
If it is a combi drill - DW988, DC988 or DC 925, it is most likely to be either the brushes, easily replaceable, damaged switch to brush lead, easily replaceable, or the switch (most common)
The easy way to test is to first twist the torque setting to the minimum setting (to stop the gearbox from exploding when you take it off!!), then you can take out the 4 gearbox screws (Torx T10), then the rear cover, another 4 Torx T10, then carefully slide the gearbox out, with the front end and gearbox attached, then remove the rear cover, then remove the last 5 torx T10 screws from the body, check the brushes 1st, as these can be changed by just taking the back cover off(if they need changing, pull off the spade terminals, then put a small driver in at the front and prise them out, the new ones just slide back in).
The easy way to check is to disconnect the 2 wires from the switch, with only the motor connected, then put the 2 wires on to the battery terminal, keeping a hold of the motor, if it now works, it is the switch, if it dosen't, then it is most likely the brushes (which should have been checked 1st) as the motors rarely go wrong.

Whatever you do, do NOT take the gearbox apart, as this is a sealed unit, NOT designed to be taken apart, and is very difficult to put back together, if you have a fault in the gearbox - simply buy a new one!!!!
I hope this helps.

Dave the tool repairer
October 2007