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Re: dewalt dc 988 cordless drill
Posible motor problem, the built in magnetic ring in the motor may broken inside or just to much dust in it. advice when replacing motor also replace th switch for the cost $132.00 plus tax canadian. thanx
We.ve the same problem with those Chinese batteries and find that this problem is quite wide spread with many brands using these batteries. I'm speaking from experience with our battery factories. No quality control!
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In most cases triggers either work or they have to be replaced. There are no repairable parts in them and lubricating them usually results in more dust sticking to them and the plastic breaks down from the lube and the problems get worse. Try blowing any debris out of the trigger with compressed air while working the switch. If that doesn't work, the replacement trigger for your drill is part number 152274-22 and is fairly easy to replace. Shop around on the web for the part as they run $50 to $70 plus shipping.
It's not unusual for Dewalt triggers to go bad and it appears you have correctly tested the trigger. You can test the motor by wiring it directly to the battery but hold on to it and only give it a short burst of power so it doesn't spin out of the case. Dewalt triggers are fairly easy to find online but shop around, they're not cheap.
This replacement battery was a great find. We searched for batteries for our Dewalt drill and this is the only site(www.drill-battery.co.uk) that had it and at a good price. Works fantastic and is a great deal.
Easiest and safest:
take the tool and batteries to nearest shop where they sell Dewalt. Ask the guy to let you use their batteries in your tool and vice versa, your batteries in their tool.
DYI procedure:To check batteries:
- if you have some multimeter, try to measure voltage and if possible also amps (but only for a fraction of the second, if battery is good, amperes shoudl jump up very quickly)
- if you have no multimeter, try to find 12V bulb (check spare bulbs for your car), use wire to connect and it should light up.
To check tool:
open it up, take some 12V DC source, put wires on contacts inside the handle where battery connects. Pull the trigger and it should work. you can try to put wires directly to contacts on the motor. Follow cables from the switch to motor.
If your warranty has expired, you're best off buying a new drill. Replacing batteries will quickly add up to the cost of a new drill.
I know they cost a lot more, but, if you want something that will last a lot longer, look at a Milwaukee, DeWalt, Makita, Bosch, Hitachi for your replacement. Milwaukee actually guarantees their LiIon batteries will last 1,000 charges or longer.