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DeWALT DC988 Type 1 18V Cordless Hammer Drill dewalt logo

 DeWALT DC988 Type 1 18V Cordless Hammer Drill Parts

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 Fig # Img Part Name Availability Price
1
Clamshell Set
Clamshell Set
Part #: 620711-02SV
In stock
9 available
 $13.49
Add To Cart
2
End Cap
End Cap
Part #: 620747-00
In stock
9 available
 $4.86
Add To Cart
3
Bit Clip
Bit Clip
Part #: 148354-03
In stock
17 available
 $2.99
Add To Cart
4
Screwdriver Bit
Screwdriver Bit
Part #: 607918-41
In stock
19 available
 $2.99
Add To Cart
5
Nameplate
Nameplate
Part #: 645166-00
Note: DC988 TYPE 1
In stock
9 available
 $3.99
Add To Cart
6
Forward/Reverse Button ( Fits the Marquette Switch)
Forward/Reverse Button ( Fits the Marquette Switch)
Part #: 634728-00
In stock
7 available
 $3.99
Add To Cart
7
VSR Switch
VSR Switch
Part #: 152274-22
In stock
8 available
 $66.70
Add To Cart
8
Motor Adaptor
Motor Adaptor
Part #: 626494-00
In stock
3 available
 $3.99
Add To Cart
9
Motor and Pinion
Motor and Pinion
Part #: 396505-22SV
Note: Includes Figure 22
In stock
14 available
 $41.16
Add To Cart
10
Torx Screw
Torx Screw
Part #: 682211-00
In stock
25+ available
 $1.99
Add To Cart
11
Transmission
Transmission
Part #: 397892-05SV
In stock
5 available
 $43.73
Add To Cart
12
Detent Shifter
Detent Shifter
Part #: 608060-00
Ships in 9 - 14 business days
 $3.99
Add To Cart
13
Keyless Chuck
Keyless Chuck
Part #: N196034
In stock
15 available
 $51.62
Add To Cart
14
Dewalt Logo Label
Dewalt Logo Label
Part #: 395657-00
In stock
14 available
 $3.99
Add To Cart
15
Gear Case Assembly
Gear Case Assembly
Part #: 399102-01SV
Note: Includes Figures 18, 28
In stock
1 available
 $70.78
Add To Cart
Fig #ImgPart NameAvailabilityPrice
16
Screw,Plastic
Screw,Plastic
Part #: 330019-49
In stock
17 available
 $1.99
Add To Cart
17
Screw (Reverse Thread)
Screw (Reverse Thread)
Part #: 605256-01
Note: Torx T20 Head
In stock
25 available
 $2.99
Add To Cart
18
Cam Return Spring
Cam Return Spring
Part #: 399059-00
Note: Included In Figure 15
In stock
2 available
 $9.06
Add To Cart
19
MTR LWire Guide
MTR LWire Guide
Part #: 603529-00
In stock
2 available
 $3.99
Add To Cart
20
Lead Wire
Lead Wire
Part #: 398978-00
In stock
3 available
 $3.99
Add To Cart
21
Lead Wire Assembly
Lead Wire Assembly
Part #: 398979-01
In stock
1 available
 $3.99
Add To Cart
22
Brush Box (Sold Individually)
Brush Box (Sold Individually)
Part #: 603754-01
Note: Included In Figure 9; Sold Individually
In stock
25+ available
 $7.00
Add To Cart
23
Side Handle
Side Handle
Part #: 646594-00
In stock
23 available
 $5.21
Add To Cart
28
Spindle
Spindle
Part #: 611904-00SV
Note: Included In Figure 15
In stock
4 available
 $41.04
Add To Cart
861
Kitbox
Kitbox
Part #: 660141-00
In stock
5 available
 $34.18
Add To Cart
866A
DeWALT 18V Ni-Cd XR Power Tool Battery
DeWALT 18V Ni-Cd XR Power Tool Battery
Part #: 651034-01
In stock
2 available
 $152.52
Add To Cart
867
Battery Cap
Battery Cap
Part #: 645221-00
In stock
25+ available
 $1.99
Add To Cart
871A
DeWALT 7.2V-18V NiCd - NiMh - Li-Ion Battery Charger
DeWALT 7.2V-18V NiCd - NiMh - Li-Ion Battery Charger
Part #: DC9310
In stock
8 available
 $77.84
Add To Cart
26
Screw,Base
Screw,Base
Part #: 330019-00
In stock
9 available
 $2.99
Add To Cart
866B
Dewalt 18 Volt Battery (XRP, Ni-Cd)
Dewalt 18 Volt Battery (XRP, Ni-Cd)
Part #: 389795-23
Note: DC9096
In stock
2 available
 $193.09
Add To Cart
871B
DeWALT 7.2V - 18V Charger
DeWALT 7.2V - 18V Charger
Part #: 388683-12
In stock
11 available
 $100.97
Add To Cart

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Drill Parts  Hammer Drill Parts

Repair Guides
Removing And Replacing DeWALT Drill Transmissions

This video explains how to carefully remove the transmissions of DeWALT drills and drivers, and how to replace them again.

How to Remove a Drill Chuck

This video explains steps for how to remove threaded-on chucks and taper-fit drill chucks, as well as steps for removing a spindle from an open-center chuck.

Power Tool Care and Maintenance 101
Power Tool Care and Maintenance 101

This article suggests guidelines for power tool care and maintenance. It also describes information tools available at eReplacementParts.com.

Drilling, Fastening, and Hammering Power Tools
Drilling, Fastening, and Hammering Power Tools

This article lists the major categories of drilling, fastening, and hammering tools, and explains the basic applications, types, and features of each.

Discussion
Discussion for the DeWALT DC988 Type 1 18V Cordless Hammer Drill

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What lube/grease for the internals of a DC988 Type 1 also I was wondering when troubleshoot the VSR switch with a volt meter what kind of readings should you get Thanks
Tinkerdave
Reply: DC988 Lube & Switch Troubles...

Tinkerdave

Hi VBC,
The lube you can use a little wheel bearing grease.Don't put too much as it will leak out on to the armature commutator. As far as the voltage from the switch,you should get 18-20 static voltage when the trigger is pulled full open.Hope that helps.Good luck.
Tinker
RogerHSr
Question: DC988 Slow

RogerHSr

I have dropped my DeWalt DC988 drill and is now running very slow and making the battery's over heat. What do I need to check/repair.
Tinkerdave
Reply: DC988 Slow

Tinkerdave

Hi RogerHsr,
You need to remove the four screws on the back cover then remove the cover and look at the brush cartridges to see if they were knocked out of their socket. A number of time I've seen them knocked out and setting in side ways with a little bit of the brush riding on the commutator and making just enough contact to allows the tool to run.If this is the case just slide it back in the socket.Hope that helps.Good luck.
Tinker
I can't get the torque adjustment collar into the drill or hammermill function, what gives?
Tinkerdave
Reply: Dewalt Dc988 - Torque Collar Iss...

Tinkerdave

Hi aquabill,
This seems to have been an issue with the detent pin in a lot of these drills. Some times you can run the drill in reverse while rotating the selector ring in to drill mode. Some times if you switch from 1 to 2 to 3 gear and run the tool it will free up the pin.Also by loosing the front screws about 1 turn of the way out and lightly turning the ring it will free the pin.But be very careful not to loosen the four front screws too much as the rear transmission plate will pop out and not allow you to tighten the screws without taking the transmission completely out.Just keep trying and in a good many of the cases it will just start working again.Hope this helps.Good luck.
Tinker
749103
Question: Dewalt Chuck Issues

ducky

I have a dewalt dc988 18v hammer drill. I'm pretty sure that my chuck is stripped badly. I was able to remove a stuck drill bit, but i am unable to open the chuck enough to access the left handed screw. The chuck will close all the way but will only barely open. If I could open it enough to even get a bit extention in there I could salvage the tool or remove the chuck. Any ideas?
Tinkerdave
Reply: Dewalt Chuck Issues

Tinkerdave

Hi Ducky,You will have to cut off the chuck outer case and cut off the ring nut.This will allow the pawls to be pushed out and you will then be able to reach the screw.Hope that helps.
Tinker
ducky
Reply: Dewalt Chuck Issues

ducky

Thanks Tinker, I was hoping to avoid that, but I kind of figured that was my last recourse. Thanks again for the info, Ducky.
Are the brushes going bad? Are they easy to replace? Are there two if one wants to replace them by themselves?
When I press the trigger on my drill the speed varies. Sometimes I'd press the trigger and it wouldn't work at all until I tapped it a little with my hand. What would be the cause of the problem, and the name and code of the part?

Thank you kindly,
Zafer
Bob
Reply: DeWALT DC988 Type 1 18V Cordless...

Bob

Sounds like bad brushes. They may be worn, cracked or just not contacting well.
Chris
Question: Dc988 Clutch

Chris

I can't get the clutch adjustment ring to go past 22. It won't go to drill or hammer. Is there an easy fix?
Karl
Reply: Dc988 Clutch

Karl

Mine does this too. I have found that if you turn the clutch to the lowest setting and then hold it so that it slips, then you can turn it back to drill or hammer.
chickenman
Reply: Dc988 Clutch

chickenman

Chris and or Karl, I had the same problem and thanks to Karl it worked. Still need to look into why this is so. Seems like something is to blame for this. Guess i'll check with the guys at ereplacement
Tinkerdave
Reply: Dc988 Clutch

Tinkerdave

Hi Guys,
The DC988 had a number of issues with the transmission.The problems were clutch slippage,sticking rotator rings and jumping out of gear.there was never any service bulletin about the problem.Look at the bottom of the drill where the battery goes in and look for a date code.It will start with a 20xx xx-xx. The first 4 digits is the year the tool was made the second will be the week and i think the last where it was made.The transmissions have a three year warranty so if your tool fall within the three years you can get a replacement transmission under warranty. Hope this helps.Good luck.
Tinker
Frosty
Question: Slow Motor?

Frosty

Just bought a couple of 18v xrp drills. One works perfectly but the other one runs slower. I've swapped the batteries round and it runs at the slower speed even when fully charged. There is a slight warm smell. The brushes are a fair way down but could this cause it or is it the motor? Cheers
Phil
Question: Chuck Play On DC988

Phil

I purchased a used DC988 a few months ago and it works great. I just noticed the other day that the spindle that attaches the chuck moves in and out about 1/4 inch or so. I know this is a hammer drill, but is that to much play in the spindle? If so what can be done to fix the problem. Overall the drill still performs.
Please, can someone tell me how to replace the brushes?
Bob
Reply: How To Replace The Brushes On Mo...

Bob

Remove the tail cap with the 4 screws. unplug the wires from the brushes. pull the brush assembly straight out to the side replace with new ones. plug the wires back in on the same side they were on and put the tail cap back on.
greg
Question: Will Not Turn

greg

My drill would drag then take off fine for awhile. Now it is locked and will not turn at all.

What might it be?
faron
Reply: Will Not Turn

faron

My drill chuck will work some then lock up until it s jarred lose may work a minute or two before locking back up.
Handy Dan
Reply: Will Not Turn

Handy Dan

Greg, before you do anything else, look further on this forum to Alberto's letter. Sounds very much like his as well as my same symptoms. Try the suggestion I gave to him and I feel confident you will have satisfying results.
Good luck with your drill!

Handy Dan
Rafael
Question: Change Chuck

Rafael

I was trying to change the chuck on my drill. But the spindle assembly came off I was wondering if I need a special tool to take the chuck off from the spindle assembly ?
MikeA
Reply: Change Chuck

MikeA

It's definitely unusual to have the spindle assembly come off when you're changing a chuck. That spindle is buried pretty deep inside the tool. As far as the chuck removal goes, you can read the post below by MikeF, or visit our chuck removal page here:

http://www.ereplacementparts.com/article/890/How_to_Remove_a_Drill_Chuck.html#threaded

You shouldn't need any special tools to remove the chuck.
Alberto
Question: DC988 Triger Or Motor?

Alberto

My drill isn't working right. I push the trigger and works intermittently and I have to push it several times before it starts working. The motor makes some noise like it wants to start so I am not sure if the problem is the trigger or the motor. Hope someone could give me some advice. Thanks.
Mark
Reply: DC988 Triger Or Motor?

Mark

Hi Alberto, Intermittent electrical problems with a tool can be very difficult to diagnose. The first thing I would do is remove the motor brushes and inspect them. Sometimes dirt or other debris will get into the brush holder causing the brush to jamb and loose contact with the armature. Make sure that the brush can move freely inside of the brush holder. If all looks good with the brushes then it is most likely the switch that has gone bad and will need replacing. The switch is part #152274-22 and is available from http://www.ereplacementparts.com Hope this helps you to repair your cordless drill! -Mark
Handy Dan
Reply: DC988 Triger Or Motor?

Handy Dan

Alberto, Be sure to remove the battery first. You should start by checking the brushes and commutator. To do this, you must use a Torx driver bit to remove the 4 screws at the back end of the drill motor cover and take off the cover. This will expose the brush assembly. Locate the wires that go to each brush assembly,attached by a spade connector. Carefully pull out the connector from each brush holder. Next, you must gently, but firmly pry straight out on the brush holder assembly ( 90 degrees to the motor shaft!) to slide it out. Not just the brush, but the assembly holding the brush. If the brush will extend at least 1/4 of an inch out of the holder, it will last a pretty long time. If not, you need to purchase new brush assemblies. Next step, and probably the most important, is to clean the commutator. (The part of the motor that the brush slides on.) Some VERY FINE sand paper or nail emory board will work. You will need to cut a strip only about as wide as the brush and try to gently buff the commutator until it is a nice bright brass color all the way around. Really, this is the most important step. Probably the main cause of your problem.
Put it all back together and try it out. I just did this on mine and completely solved the exact same symptoms you described.
Good luck. You should have no problems!
Handy Dan
steve
Question: Keyless Chuck

steve

how do i remove chuck for replacement?
MikeF
Reply: Keyless Chuck

MikeF

The chuck replacement process is relatively simple. We have a full walkthrough on our site (including a video) that applies to most keyless chucks. You'll want to check the "Threaded-on" section of our article here:

http://www.ereplacementparts.com/removing-drill-chuck-c-8873_15176.html#Threaded

You'll need to start by removing the chuck screw, which is left-handed (meaning you'll have to turn it clockwise to loosen it), then put the biggest allen wrench you can fit into chuck. Tighten the chuck around the allen wrench, and secure the drill (preferably in a vise) before hitting that allen wrench (counter-clockwise) with a hammer a few times to get it loose. After that, you should be able to get the chuck off by hand.

Putting a new chuck back on is basically the same process in reverse. The whole thing should (hopefully) take no more than a few minutes.

Our article may have some details I may have missed, and the video has been pretty helpful to a lot of people, so I'd still recommend referring to it before starting this project.
Hi, picked the drill motor up today and touched the trigger and the chuck fell off. Apparently it took a fall. Hmm.
Anyhow, chuck still works fine other than the fact it isn't attached. Half the spindle is still on the drill and half still in the chuck.

part 1: Down in the chuck is what appears to be a bolt with a T20 head and a washer (in the end of the spindle.) Is this a left hand thread? How do I get it out when the silly spindle keeps turning in the chuck. Turning it counter clockwise it seemed to just lock up and I had quite a time getting it unlocked. Turning it clockwise, the chuck tightens up on the torx bit and keeps it from coming out.

part 2: there are 3 tiny bolts with T10 heads going back into the front of the drill, in front of the chuck. I haven't done anything to these yet. Go ahead and take them out? Will there be any surprises?

part 3: Near as I can tell, I just need this part:
eReplacementParts.com : Spindle Assembly [611904-00] - $31.08
But then again I might be completely wrong about that. Comments?

Thanks for helping a first time poster,
VegasF6

*edit* The end down in the chuck must be this bolt here:
http://www.ereplacementparts.com/screw-reverse-thread-p-64358.html
Which is listed as a reverse thread. And it has red loctite on it. So, I guess I just need to get tough with it?
Vegasf6
Reply: DC988 Hammer Drill Busted Spindl...

Vegasf6

Yep, just took a little more muscle, yes it was reverse threads, and no, there wasn't much of a surprise behind the 3 bolts in the drill face.
diggla
Question: Dewalt Dc988

diggla

Does anyone know how to replace the clutch and motor on the 18v hammer drill? Is there a good write up that i could use?

Thanks
UtahAV
Reply: Dewalt Dc988

UtahAV

Hi diggla,

We have an article and video of a transmission repair on a DW987 Drill. Most of the information will also apply to your DC988. You can find the article and video at the following link...

Removing And Replacing DeWALT Drill Transmissions.

I hope this helps with your repair!

-UtahAV
-Mark
mgrepairsit
Reply: Dewalt Dc988

mgrepairsit

[QUOTE=diggla;5913]Does anyone know how to replace the clutch and motor on the 18v hammer drill? Is there a good write up that i could use?

Thanks" If you take the rear cap off removing the four screws, you can then lay the drill down on the table with screw side up.remove remander of screws take clamshell off.you will now be looking at inside of drill grab motor lift up pull to the left its now removed,take and lift gearcase and chuck up a little pull to the right its now removed . assembly is the reverse.when installing transmission there will be a pin sticking out the front wich you must align going back into gearcase look at notchs on the side of the transmission those will line up with ones inside of gearcase as you install it you may have to turn chuck to get it to seat all the way in motor is self explaintory its really pretty easy hopefully i have helped you out good luck
losfinch
Question: DW988 Smoking Gun

losfinch

Hi. New to the forum. I've got a dewalt988 that has started to smoke a little bit and put out a burned smell with just about any usage. I'm new to this game so just looking for a little advice. Would it be just the brushes? Its about 3 years old and has been used by a homeowner with what I would call "medium" duty usage.
a. palmer jr.
Reply: DW988 Smoking Gun

a. palmer jr.

I'd say take the drill apart and clean it up inside and put new brushes in it would probably fix it. Don't forget to clean up the part of the armature that the brushes contact. I usually use some kind of real fine emory cloth for this or something like #600 sandpaper and then really clean that part of the armature up afterward so as not to leave any sand in it off of the sandpaper.
My reliable DeWalt DC988 finally died on me. I ordered new brushes. I removed the old ones.

I'm sure this is a dumb question but how exactly do the new brushes fit in. I am having a problem getting them to set properly. It seems like the slot that slides in to securely seat the brushes is not aligning properly or fully seating. My first time at this so any assistance much appreciated.

This is a great site. Hugh
qdea
Reply: DeWalt Drill Replacing Brushes D...

qdea

Fist off you should compare the two brushes to make sure thay're the same size (thkns and width) and if they are,then the holder probably has a build up of residue from the old brushes.so you shud try cleaing it out first using a small flat scewdriver (terminal type) and if that don't work lightly sanding wit a piece of sand paper shud do the trick.
Good luck

Quincy
I have a DeWalt model DC988 heavy duty xrp 18v hammer drill. When drilling, it tends to "clutch out" or skip, as if perhaps a gear is missing a tooth (or several teeth). I have a few questions:

1) What might be causing this?

2) Is it something I can fix myself? If so, is there a repair manual available somewhere?

3) If it is something left to a repair shop, where should I send it?

Thanks in Advance,
Steve Bohne
UtahAV
Reply: DeWalt Hammer Drill "skippi...

UtahAV

Hi sbohne,

It sounds to me like the transmission is on its way out. It is an easy repair to make. We have an article that will walk you through the repair. You can find the article at the following link...

Removing And Replacing DeWALT Drill Transmissions

The new transmission is part #397892-05

Let us know how it turns out!

-UtahAV
-Mark
James_M
Reply: DeWalt Hammer Drill "skippi...

James_M

It is very unlikely this can be repaired unless you have access to custom made gears or junk drills to pull from. It may be stripped gears, broken pressure springs, or darn near anything. I've pulled several of these apart, and have about a 50/50 success rate of returning them to a reduced service. (some drill is better than no drill) It would be cost prohibitive for anyone to stock each piece in these clutches or even offer a repair service (I've thought about it). By the time you paid parts and labor, a new trans from this site is quite the bargain. My best and only advice is be prepared to buy the whole trans or junk the drill, but before you do that, open it up and poke around. My experience is they are full of layered planetary gears and clutch pins that have holes and detents to go in. There is a ring with three teeth near the bottom that seems to frequently lose a tooth freezing up the entire drill. TL;DR, open it up and poke around if you wish, but a new assembly is simply the best fix for full service.
arizzotto
Question: DC988 How To

arizzotto

Hi All,

How do I remove the DC988 Transmission. I have the motor removed, that was not a problem, just not sure on how to remove Transmission.

thanks.
cmoorejack
Reply: DC988 How To

cmoorejack

Hey arizzotto,
If you have the front housing removed..[4 screws] and then the housing half separated..the transmission will remove easily..but you do have to have the front part of the drill removed..
parts avail at ereplacementparts.com
hope this helps..:)
Craig
rockydog
Question: Dewalt Dc988, Loss Of Torque

rockydog

I've got a nicely used DC988 Type 1 hammerdrill. Over time, the drill has lost it's torque. Even if I keep it on Max Torque, it still clicks with only some resistance. Any thoughts on parts to replace? Thanks.
cmoorejack
Reply: Dewalt Dc988, Loss Of Torque

cmoorejack

Hey rockydog,
Most likely it is the transmission..they do wear out over time..
part # 397892-05...avail at ereplacementparts.com..
hope this helps..:)
Craig
jeep
Reply: Dewalt Dc988, Loss Of Torque

jeep

could you please tell how to replace the tranmission...see read about taking off four srews than what?
UtahAV
Reply: Dewalt Dc988, Loss Of Torque

UtahAV

Hi jeep,

We have an article and video on our site that I think will help you with replacing the transmission on your drill. You can find it at the following link...

Replacing DeWalt Cordless Drill Transmissions.

Let us know how the repair goes!

-UtahAV
-Mark
gabygabi
Question: Hi

gabygabi

my name is gabi and i got an DC988 dewalt and i wanna replace the chuck but i can't coz the extension bit had is stuck inside! so anybody who can help me..or Mike coz i saw he is a tech link removed tell me how is posiible to take out that bit from the chuck! thnk you!
Dave
Reply: Hi

Dave

Hey Gabi,

Welcome to the forum. So, you saying that there is a bit stuck in the chuck and you can't get it out?


If that is the case, here are two posts that will help:



Drill chuck is stripped



Bit stuck in chuck
gabygabi
Reply: Hi

gabygabi

thank you Dave for answering me.. I'll try doing what u tell me and I will thak you again after I will take out that bit! thank you anyway!
I have a Dewalt DC988 drill. I am having a lot of spark everytime i used it. I think i need to replace the brush. When i open the drill, I cannot remove the brush. I really need help for this. I'm not the handy man type. Is anybody out there can tell me how to remove and install the brush.

Thanks in advance.
Mike
Reply: How To Replace Brush In Dc988

Mike

Hello! The brushes in your Dewalt DC988 are removable, but you have to remove the entire brush holder along with the brush. The brushes are housed in little clips that are attached to the motor. Here's a pic:

603754-01 Brush and Holder

You will need to unclip the brush and holder from the motor to replace it. Fortunately the brushes are sold along with the holder so all you'll have to do is clip the replacement assemblies in place and you're all set.
dan6531
Question: Dewalt Hammer Drill Question

dan6531

I have the dewalt DC988 type 1 hammer drill. I've used it heavily for some years now and one day it started hesitating and then finnally died. I've replaced the brushes and it still doesn't work. Could it be the switch or the motor? Please help!
cmoorejack
Reply: Dewalt Hammer Drill Question

cmoorejack

Hey Dan6531,
If you have an ohm meter you can test the different components..without.. it's kind of a guessing game..most likely it is your switch now....part #152274-22 avail at ereplacementparts.com..:)
Hope this helps..
Craig
Odie
Reply: Dewalt Hammer Drill Question

Odie

One simple way to bypass your on/off switch to test your cordless drill’s motor is to hot-wire the motor. This test should help you determine whether your motor is the cause of your drill's problems, or if your switch might be the one to blame. All you will need besides basic tools to take your drill apart are two wires that will be used to connect the battery to the motor. Make sure you have a good and fully-charged battery. Follow these steps to conduct this test:

1.Once you have taken your drill apart and removed the battery, take the switch from the handle and disconnect the two wires from the switch.



2. Take a wire and connect it from one of the battery contacts to one of the motor wires.



3. Hold the motor firmly in one hand, then connect another wire from the second battery contact to the other motor wire.

Note: Do not worry about which wire you connect to which battery contact because it will not matter on a DC motor; it only determines which direction the motor will turn.



4. The motor should turn on to full power when you make the second connection. If it does not, your motor is not working properly. If it does work, then your switch is probably what needs to be replaced.

Keep in mind that to hot-wire your motor it has to be disconnected from the switch.

Let me know how it goes.

Odie
dan6531
Reply: Dewalt Hammer Drill Question

dan6531

Thanks guys! I wish I would have found this site earlier!
I have a Dewalt hammer drill which I purchased used a few years ago. It has just started sparking ALOT and smoking though otherwise runs fine. I hate to run it given the smoking though not sure why this would happen. The sparks are coming from the motor/brushes and yes there were small sparks previously though these are coming out of the shell now and it sparks the whole time its running. Any thoughts about how to remedy this?
cmoorejack
Reply: Dewalt Drill Sparks And Smokes

cmoorejack

Hey Kevand,
You may have the brush's wearing down causing excessive sparking and they may just need to be replaced,however the smoking is not a good sign..ugh.. worst case is your armature is shorted and it may be time for a repair or a replace [when you check your brush's be sure and look at the commutator of the armature [where the brush's make contact] and look for any signs of damage..
hope this helps...
Craig
chrisjo
Question: Dewalt DC988 Smoking/Sparking

chrisjo

I have a Dewalt DC988 drill that throws sparks and occasionally smoke out of the vents on the back. Good burning smell too.
Brushes looked ok, but I replaced them anyway (only $4/brush).
It still does the same thing.
Wondering whether I should try replacing the motor or what?
Motor costs about $40 on ereplacement.
Any suggestions greatly appreciated.
Cheers,
Chris
Mike
Reply: Dewalt DC988 Smoking/Sparking

Mike

It definitely sounds like the motor to me. Your magnetic field could be cracked or you may have a short in your armature. Either way, you need to replace the whole motor before it takes out your variable speed switch. The motor comes as a sealed unit and includes a new set of brushes. Here's a link to the motor for your drill:

eReplacementparts.com : MOTOR AND PINION [396505-22] - $39.50
GANNET
Reply: Dewalt DC988 Smoking/Sparking

GANNET

[quote=chrisjo;359]i have a dewalt dc988 drill that throws sparks and occasionally smoke out of the vents on the back. Good burning smell too.
Brushes looked ok, but i replaced them anyway (only $4/brush).
It still does the same thing.
Wondering whether i should try replacing the motor or what?
Motor costs about $40 on ereplacement.
Any suggestions greatly appreciated.
Cheers,
chris"
safety first, remove the power source battery or unplug the tool--- had same problem with a dewalt cordless drill-try this if you are comfortable with taking unit apart. Get to motor, remove brush box (housing)-- i'm guessing you did this to replace the brushes--with very fine sand paper clean the commutator- the part of the rotor that the brushes make contact with until you see clean copper evenly where the brush will make contact. Blow out any junk from sanding,now you will notice small grooves or lines on the commutator-using a razor blade or very small flat head screw driver(jewelers size) carefully clean out each one until you can see a separation between each, again clean out with compressed air - reassemble.tool may spark some as brushes re seat them selfs should only 5 to 10 seconds on high speed.be sure to test in safe place no flammables etc.if still a major problem go with a new motor .
Hope this helps
chrisjo
Reply: Dewalt DC988 Smoking/Sparking

chrisjo

Tried the cleaning and no help.
Ordered a new motor and put it in today.
Works like a champ.
Thanks for the help.
As the motor came with its own set of brushes, I have a spare set of those too :)
Cheers,
Chris
Ben
Reply: Dewalt DC988 Smoking/Sparking

Ben

[QUOTE=Mike;363]It definitely sounds like the motor to me. Your magnetic field could be cracked or you may have a short in your armature. Either way, you need to replace the whole motor before it takes out your variable speed switch. The motor comes as a sealed unit and includes a new set of brushes. Here's a link to the motor for your drill:

eReplacementparts.com : MOTOR AND PINION [396505-22] - $39.50"

I recently replaced my motor with new set of brushes included but I still have sparks after testing it. Will the sparks go away after awhile?
branden34
Reply: Dewalt DC988 Smoking/Sparking

branden34

MIne did the same. I havea new motor on order. since that is the easy way out lol. I have no clue how to get the brushes out anyways:rolleyes:
UtahAV
Reply: Dewalt DC988 Smoking/Sparking

UtahAV

[QUOTE=Ben;3425]I recently replaced my motor with new set of brushes included but I still have sparks after testing it. Will the sparks go away after awhile?"

Yes, there will always be some sparks, that is normal. When a new set of brushes are put in, the end of the carbon that touches the commutator on the armature is flat. That surface will quickly wear to the curvature of the commutator. The excessive sparking you initially see is from the brush wearing to that curved shape.

-UtahAV
-Mark
Wheelygood
Reply: Dewalt DC988 Smoking/Sparking

Wheelygood

Great website and it is VERY easy to find parts!

I just finished replacing the brushes and have the same issue as the previous posters. So I will now buy a new motor.

Will the motor slide out once I remove the leads to the brushes?
Do I need to be concerned about anything else when I pull out the motor?

Thanks in advance for the help.
In the beginning, I thought that DeWalt was the "hard to beat" manufacturer of cordless tools. My experience with using these cordless DeWalt tools has diminished,especially since the other brand manufacturers started introducing cordless tools. My main grievance is the cost of repairs to these tools: I went to a DeWalt service center to buy a new chuck for my DC988 hammer drill. I was presented with a plastic chuck but since my drill chuck was all metal I was offered a replacement price of over $80.00, which was double the cost of the plastic chuck. Since I could purchase the "tool only" for about $100.00 I am having trouble spending any more money on DeWalt tools for fear that they will break down (the drill/driver that is) and there are different manufacturers of drill/drivers that perform.
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